IES INDUSTRIES INC
8-K, 1995-11-20
ELECTRIC & OTHER SERVICES COMBINED
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                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549

                            -----------------------

                                    FORM 8-K


                                 CURRENT REPORT


                       Pursuant to Section 13 or 15(d) of
                      the Securities Exchange Act of 1934

                            -----------------------


              Date of Report
              (Date of earliest
              event reported):         November 10, 1995


                              IES INDUSTRIES INC.
            -------------------------------------------------------
               (Exact Name of Registrant as Specified in Charter)


    Iowa                            1-9187                       42-1271452
- ---------------                 ----------------             -------------------
(State or Other                 (Commission File               (IRS Employer
Jurisdiction of                     Number)                  Identification No.)
Incorporation)


                      IES Tower, Cedar Rapids, Iowa 52401
              -----------------------------------------------------
          (Address of principal executive offices, including zip code)


                                 (319) 398-4411
                        -------------------------------
                        (Registrant's telephone number)



<PAGE>



Item 5.  Other Events.

                  IES Industries Inc., a holding company  incorporated under the
laws of the  State of Iowa  ("IES"),  WPL  Holdings,  Inc.,  a  holding  company
incorporated under the laws of the State of Wisconsin ("WPL"),  Interstate Power
Company, an operating public utility incorporated under the laws of the State of
Delaware  ("IPC"),  and AMW Acquisition,  Inc., a wholly owned subsidiary of WPL
incorporated under the laws of the State of Delaware ("AMW"),  have entered into
an  Agreement  and Plan of Merger,  dated as of November  10, 1995 (the  "Merger
Agreement"), providing for (a) the merger of IES with and into WPL, which merger
will  result in the  combination  of WPL and IES as a single  company  (the "IES
Merger"),  and (b) the merger of AMW with and into IPC, which merger will result
in IPC becoming a wholly owned subsidiary of WPL (the "IPC Merger", and together
with the IES Merger, the "Merger").  The Merger,  which was unanimously approved
by the Board of Directors of each of the constituent  companies,  is expected to
close promptly after all of the  conditions to the  consummation  of the Merger,
including  obtaining  all  applicable  regulatory  approvals,  are  fulfilled or
waived. The regulatory  approval process is expected to take approximately 12 to
18 months.

                  In the Merger,  WPL will change its name to Interstate  Energy
Corporation  ("Interstate Energy") and Interstate Energy, as the holding company
of the combined enterprise,  will be registered under the Public Utility Holding
Company Act of 1935, as amended. Interstate Energy will be the parent company of
WPL's present  principal utility  subsidiary,  Wisconsin Power and Light Company
("WP&LC"),  IES's present utility subsidiary,  IES Utilities Inc. ("Utilities"),
and IPC.  Following  the  Merger,  the  non-utility  operations  of WPL and IES,
Heartland Development Corporation and IES Diversified Inc.,  respectively,  will
be combined under one entity to manage the diversified  operations of Interstate
Energy.

                  Under  the terms of the  Merger  Agreement,  each  outstanding
share of common stock, no par value, of IES will be cancelled and converted into
the right to receive .98 of a share of common  stock,  par value $.01 per share,
of Interstate Energy (the "Interstate Energy Common Stock") and each outstanding
share of common stock,  par value $3.50 per share,  of IPC will be cancelled and
converted  into the right to receive  1.11 shares of  Interstate  Energy  Common
Stock. The outstanding  shares of common stock, par value $.01 per share, of WPL
will remain  unchanged and  outstanding  as shares of  Interstate  Energy Common
Stock.  As of the close of business on November 10, 1995, WPL had  approximately
30.8 million  common  shares  outstanding,  IES had  approximately  29.3 million
common shares  outstanding and IPC had  approximately  9.6 million common shares
outstanding. Based on such capitalization,  the Merger will result in the common
shareowners of WPL holding 43.9% of the common equity of Interstate  Energy, the
common  shareowners  of IES  receiving  40.9% of the common equity of Interstate
Energy and the common shareowners of IPC receiving 15.2% of the common equity of
Interstate Energy.  Each outstanding share of preferred stock, par value $50 per
share,  of IPC will be  unchanged  as a result  of the  Merger  and will  remain
outstanding.  In this Current Report on Form 8-K,  unless the context  otherwise
requires,   all  references  to  Interstate  Energy  Common  Stock  include,  if
applicable,  the  associated  rights to  purchase  shares of such  common  stock
pursuant to the terms of the Rights Agreement between WPL and Morgan Shareholder
Services Trust  Company,  as Rights Agent  thereunder,  dated as of February 22,
1989.

                  The parties  expect that the dividend at the effective time of
the Merger  will be the  dividend  then being paid by WPL.  Subsequent  dividend
policy will be developed by the Board of Directors of Interstate Energy.


                                      -2-

<PAGE>



                  The  Merger  is  subject  to  customary  closing   conditions,
including,  without limitation,  the receipt of required shareowner approvals of
WPL, IES and IPC; and the receipt of all  necessary  governmental  approvals and
the making of all necessary  governmental filings,  including approvals of state
utility regulators in Illinois,  Iowa, Minnesota and Wisconsin,  the approval of
the Federal Energy Regulatory Commission, the Securities and Exchange Commission
(the  "SEC")  and the  Nuclear  Regulatory  Commission,  and the  filing  of the
requisite  notification  with the Federal Trade Commission and the Department of
Justice  under the  Hart-Scott-Rodino  Antitrust  Improvements  Act of 1976,  as
amended,  and the expiration of the applicable  waiting period  thereunder.  The
Merger is also  subject to receipt of opinions  of counsel  that the Merger will
qualify  as  a  tax-free  reorganization,   and  assurances  from  the  parties'
independent  accountants  that the Merger will qualify as a pooling of interests
for  accounting  purposes.  In  addition,  the  Merger is  conditioned  upon the
effectiveness  of a registration  statement to be filed by WPL with the SEC with
respect  to shares of the  Interstate  Energy  Common  Stock to be issued in the
Merger  and the  approval  for  listing  of such  shares  on the New York  Stock
Exchange.  (See  Article IX of the Merger  Agreement.)  It is  anticipated  that
shareowners  will vote upon the Merger at the  upcoming  annual  meetings in the
second quarter of 1996.

                  The Merger Agreement contains certain covenants of the parties
pending the  consummation  of the Merger.  Generally,  the parties must carry on
their businesses in the ordinary course  consistent with past practice,  may not
increase  dividends on common  stock in excess of current  levels in the case of
IES and IPC and beyond a specified  limit in the case of WPL,  and may not issue
any capital stock beyond  certain  limits.  The Merger  Agreement  also contains
restrictions on, among other things, charter and bylaw amendments, acquisitions,
capital  expenditures,   dispositions,   incurrence  of  indebtedness,   certain
increases in employee  compensation  and benefits,  and affiliate  transactions.
(See Article VII of the Merger Agreement.)

                  The Merger Agreement provides that, after the effectiveness of
the Merger (the  "Effective  Time"),  the corporate  headquarters  and principal
executive  offices  of  Interstate  Energy  and WP&LC  will  remain in  Madison,
Wisconsin,  the headquarters of Utilities will remain in Cedar Rapids, Iowa, and
the headquarters of IPC will remain in Dubuque,  Iowa. Interstate Energy's Board
of Directors,  which will be divided into three classes, will consist of a total
of 15  directors,  6 of  whom  will be  designated  by  WPL,  6 of whom  will be
designated  by IES and 3 of whom will be  designated  by IPC.  Mr. Lee Liu,  the
current  Chairman of the Board,  President and Chief  Executive  Officer of IES,
will serve as  Chairman of the Board of  Directors  of  Interstate  Energy for a
period of two years from the  Effective  Time.  Mr.  Wayne H.  Stoppelmoor,  the
current  Chairman of the Board,  President and Chief  Executive  Officer of IPC,
will serve as Vice Chairman of the Board of Directors of Interstate Energy for a
period of two years from the  Effective  Time.  Mr.  Erroll B. Davis,  Jr.,  the
current  President and Chief Executive Officer of WPL, will become President and
Chief Executive  Officer of Interstate Energy from the Effective Time. Mr. Davis
will also  assume the  position of Chairman of the Board when Mr. Liu retires as
Chairman. (See Article VIII of the Merger Agreement.)

                  The  Merger   Agreement  may  be   terminated   under  certain
circumstances, including (i) by mutual consent of the parties; (ii) by any party
if the Merger is not consummated by May 10, 1997 (provided,  however,  that such
termination  date shall be extended to May 10, 1998 if all conditions to closing
the  Merger,  other  than the  receipt  of  certain  consents  and/or  statutory
approvals by any of the parties,  have been satisfied by May 10, 1997); (iii) by
any party if any of WPL's, IES's or IPC's shareowners vote against the Merger or
if any state or federal  law or court  order  prohibits  the  Merger;  (iv) by a
non-breaching party if there exist breaches of any representations or warranties
contained  in  the  Merger  Agreement  or in the  Stock  Option  Agreements  (as
hereinafter defined), as of the date thereof, which breaches, individually or in
the aggregate, would result in a material adverse

                                      -3-

<PAGE>



effect on the  breaching  party and which are not cured within  twenty (20) days
after notice; (v) by a non-breaching  party if there occur breaches of specified
covenants  in the Merger  Agreement  or  material  breaches  of any  covenant or
agreement in the Merger  Agreement or in the Stock Option  Agreements  which are
not cured within twenty (20) days after  notice;  (vi) by any party if the Board
of  Directors  of any  other  party  shall  withdraw  or  adversely  modify  its
recommendation  of the  Merger  or shall  approve  or  recommend  any  competing
transaction; or (vii) by any party, under certain circumstances,  as a result of
a third-party  tender offer or business  combination  proposal which such party,
pursuant to its directors'  fiduciary duties, is, in the opinion of such party's
counsel and after the other parties have first been given an opportunity to make
concessions  and adjustments in the terms of the Merger  Agreement,  required to
accept. (See Article X of the Merger Agreement.)

                  The Merger  Agreement  provides that if a breach  described in
clause (iv) or (v) of the previous paragraph occurs, then, if such breach is not
willful, the non-breaching party or parties will be entitled to reimbursement of
its  or  their  out-of-pocket  expenses,  not  to  exceed  $5  million  to  each
non-breaching  party. In the event of a willful breach, the non-breaching  party
or parties will be entitled to its or their out-of-pocket  expenses (which shall
not be limited to $5 million)  and any remedies it or they may have at law or in
equity,  and provided that if, at the time of the breaching  party's or parties'
willful  breach,  there shall have been a third party  tender  offer or business
combination  proposal which shall not have been rejected by the breaching  party
or parties or withdrawn by the third party, and within two and one-half years of
any termination by the  non-breaching  party or parties,  the breaching party or
parties accept an offer to consummate or consummates a business combination with
such third party, then such breaching party or parties, upon the closing of such
business  combination,  will  pay to  the  non-breaching  party  or  parties  an
additional  aggregate  fee equal to $25 million,  if WPL or IES is the breaching
party, or $12.5 million,  if IPC is the breaching  party.  The Merger  Agreement
also requires payment of an aggregate  termination fee of $25 million, if WPL or
IES is the Target Party (as hereinafter  defined),  or $12.5 million,  if IPC is
the Target Party, together with reimbursement of out-of-pocket  expenses, by one
party (the "Target Party") to the other parties in the following  circumstances:
(1) the Merger  Agreement is terminated (x) as a result of the acceptance by the
Target Party of a third-party tender offer or business combination proposal, (y)
following  a failure  of the  shareowners  of the  Target  Party to grant  their
approval to the Merger or (z) as a result of the Target Party's material failure
to convene a shareowner meeting,  distribute proxy materials and, subject to its
board of directors'  fiduciary duties,  recommend the Merger to its shareowners;
(2) at the time of such  termination  or prior to the  meeting  of such  party's
shareowners  there  shall  have  been a  third-party  tender  offer or  business
combination  proposal  which shall not have been rejected by the Target Party or
withdrawn by such third party; and (3) within two and one-half years of any such
termination  described in clause (1) above, the Target Party accepts an offer to
consummate or  consummates  a business  combination  with such third party.  The
applicable  termination  fee  and  out-of-pocket  expenses  referred  to in  the
previous  sentence  will be paid at the  closing  of such  third-party  business
combination.  The  termination  fees  payable  by WPL,  IES and/or IPC under the
foregoing  provisions  plus the aggregate  amount which could be payable by WPL,
IES and/or IPC under the Stock Option Agreements may not exceed $40 million (for
WPL or IES) or $20  million  (for  IPC) in the  aggregate.  In  addition  to the
foregoing,  if the Merger Agreement is terminated under  circumstances that give
rise to the payment of the  termination  fee discussed above by the Target Party
referred  to  above  and  within  nine  months  of such  termination  one of the
non-terminating  parties is acquired by the same third party  offeror,  the sole
remaining party will be entitled to (i) a second termination fee of $25 million,
if WPL or IES is the second target party,  or $12.5 million if IPC is the second
target party, on the signing of a definitive agreement relating to such business
combination,  and (ii) payment of any termination fee paid to such second target
party by the original  terminating party (i.e.,  first Target Party) pursuant to
the termination of the Merger Agreement. If only one party must pay expenses, or
is entitled to receive a

                                      -4-

<PAGE>
termination  fee as set forth above,  such party will pay or receive one hundred
percent (100%) of the applicable expenses or fee. If two parties are required to
pay expenses or entitled to receive any such fee,  each such party's  percentage
of such expenses or fee will equal a fraction,  the numerator of which shall be,
in the case of IES or IPC,  the  number of shares of  Interstate  Energy  Common
Stock which would have been issuable (on a fully diluted  basis) to such party's
shareowners,  or, in the case of WPL, the number of shares of Interstate  Energy
Common  Stock (on a fully  diluted  basis) that would have been  retained by its
shareowners,  had the  effective  time of the  Merger  occurred  at the time the
Merger  Agreement  is  terminated,  and the  denominator  of  which  will be the
aggregate  number of shares of  Interstate  Energy  Common Stock that would have
been  issuable to or retained by (in either case on a fully  diluted  basis) the
shareowners  of the two parties  required to pay expenses or entitled to receive
such fee had the  effective  time of the Merger  occurred at the time the Merger
Agreement is terminated. (See Article X of the Merger Agreement.)

                  Concurrently  with  the  Merger  Agreement,  WPL,  IES and IPC
entered into reciprocal stock option agreements (the "Stock Option  Agreements")
each  granting  the other two  parties  an  irrevocable  option  to  purchase  a
specified  percentage  of up to that  number of  shares  of common  stock of the
granting  company which equals a collective  aggregate of 19.9% of the number of
shares of common stock of the granting company outstanding on November 10, 1995,
at an exercise  price of $30.675  per share of WPL Common  Stock,  $26.7125  per
share of IES Common Stock or $28.9375 per share of IPC Common Stock, as the case
may be, under certain  circumstances if the Merger Agreement becomes  terminable
by one or more parties as a result of one or more other parties'  breach or as a
result of one or more of the other parties becoming the subject of a third-party
proposal for a business combination.  Any party whose option becomes exercisable
(the  "Exercising  Party")  (i) will have the right to  receive,  under  certain
circumstances,  a cash  settlement  that would pay to the  Exercising  Party the
difference between the exercise price and the then current market price and (ii)
may request that the granting  company  repurchase from it all or any portion of
the  Exercising  Party's  option at the  price  specified  in the  Stock  Option
Agreements. (See the Stock Option Agreements.)

                  Interstate   Energy  is  expected   to  be  the   34th-largest
investor-owned  utility  holding  company in the United States based on the 1994
combined  revenues of WPL, IES and IPC of $1.9 billion.  It is anticipated  that
Interstate Energy will have a market  capitalization of approximately $2 billion
(based on the current  combined market  capitalization  of WPL, IES and IPC) and
assets of nearly $4 billion  (based on December 31, 1994 combined asset totals).
It is expected  that  Interstate  Energy will serve more than  850,000  electric
customers  and 360,000  natural gas customers in Iowa,  Illinois,  Minnesota and
Wisconsin.  The business of Interstate Energy will consist of utility operations
and various non-utility enterprises.

                  A preliminary  estimate  indicates that the Merger will result
in net savings of approximately $700 million in costs over 10 years.

                  WPL,  IES and IPC  recognize  that  the  divestiture  of their
existing gas  operations  and certain  non-utility  operations  is a possibility
under the new registered holding company structure,  but will seek approval from
the SEC to maintain such businesses.  If divestiture is ultimately required, the
SEC  has   historically   allowed   companies   sufficient  time  to  accomplish
divestitures in a manner that protects shareowner value.

                                    -5-

<PAGE> 
                               
                  In  response  to the announcement of the  Merger, Standard and
Poor's  Corporation  ("S&P") placed its ratings of  WP&LC's  "AA"  rated  senior
secured debt, "AA-" rated  preferred  stock  and  "A-1+"   commercial  paper  on
Credit Watch with  negative  implications.  The ratings of  Utilities' "A" rated
senior secured debt, "A-"  rated  preferred  stock and  "A-1"  rated  commercial
paper were placed on Credit Watch with positive  implications.  The ratings   of
IPC's "A+" rated senior secured debt, "A" rated senior unsecured debt, "A" rated
preferred stock and "A-1" rated commercial paper were  affirmed.  S&P  indicated
that if the Merger is completed,  the  likely  credit  ratings  for  the  senior
secured debt of WP&LC, Utilities and IPC are expected to be "A+".

                 Moody's  Investors  Service  ("Moody's")  placed  WP&LC's "Aa2"
rated  senior  secured  debt,  "(P)Aa2"   rated  senior   secured   debt   shelf
registration, "aa3" rated preferred stock, "(P)aaa3" rated preferred stock shelf
registration  and "Aa3"   counterparty   rating   under   review   for  possible
downgrade.  The  ratings  of Utilities' "A2" rated senior secured debt,  "(P)A2"
rated senior secured debt shelf  registration,  "A2"  rated  secured   pollution
control bonds, "A3" unsecured pollution  control  bonds,  "(P)A3"  rated  senior
unsecured  debt      shelf      registration,    "(P)Baa1"     rated     junior
subordinated unsecured debt shelf registration and "A3" counterparty rating have
been placed under review for possible upgrade.  In addition,  IPC's  "A1"  rated
senior secured debt, "(P)A1"  rated senior secured  debt   shelf   registration,
"A2"  rated  unsecured pollution   control  bonds, "a2" rated  preferred  stock,
"(P)a2" rated  preferred stock shelf registration and "A2" counterparty   rating
have  been  placed  under review for possible downgrade.  Moody's indicated that
the "Prime-1" short term ratings of the three companies are not under review.
                  
                  The Merger  Agreement,  the press release issued in connection
therewith and the Stock Option  Agreements are filed as exhibits to this Current
Report on Form 8-K and are incorporated herein by reference. The brief summaries
of the material provisions of the Merger Agreement and

                                     -6-
<PAGE>

the Stock Option  Agreements  set forth above are qualified in their entirety by
reference to each respective agreement filed as an exhibit hereto.


Item 7.  Financial Statements and Exhibits.

         (a)     Not Applicable.

         (b)     Not Applicable.

         (c)     Exhibits.

                           The exhibits listed in the accompanying Exhibit Index
                           are filed as part of this Current Report on Form 8-K.

                                      -7-

<PAGE>



                                   SIGNATURES

                  Pursuant to the requirements of the Securities Exchange Act of
1934,  the  Registrant has duly caused this report to be signed on its behalf by
the undersigned thereunto duly authorized.



                                       IES INDUSTRIES INC.



Date:  November 17, 1995               By:/s/ BLAKE O. FISHER, JR.
                                          ------------------------
                                          Blake O. Fisher, Jr.
                                          Executive Vice President and
                                           Chief Financial Officer



                                      -8-

<PAGE>


                              IES INDUSTRIES, INC.

                           EXHIBIT INDEX TO FORM 8-K
                         Report Dated November 10, 1995



                                    Exhibit
                                    -------

(2.1)        Agreement and Plan of Merger, dated as of November 10, 1995, by and
             among WPL Holdings,  Inc., IES Industries  Inc.,  Interstate  Power
             Company and AMW Acquisition, Inc.*

(2.2)        Option  Grantor/Option  Holder  Stock  Option and  Trigger  Payment
             Agreement,  dated  as of  November  10,  1995,  by  and  among  WPL
             Holdings, Inc. and IES Industries Inc.

(2.3)        Option  Grantor/Option  Holder  Stock  Option and  Trigger  Payment
             Agreement,  dated  as of  November  10,  1995,  by  and  among  WPL
             Holdings, Inc. and Interstate Power Company.

(2.4)        Option  Grantor/Option  Holder  Stock  Option and  Trigger  Payment
             Agreement,  dated  as of  November  10,  1995,  by  and  among  IES
             Industries Inc. and WPL Holdings, Inc.

(2.5)        Option  Grantor/Option  Holder  Stock  Option and  Trigger  Payment
             Agreement,  dated  as of  November  10,  1995,  by  and  among  IES
             Industries Inc. and Interstate Power Company.

(2.6)        Option  Grantor/Option  Holder  Stock  Option and  Trigger  Payment
             Agreement,  dated as of November 10, 1995, by and among  Interstate
             Power Company and WPL Holdings, Inc.

(2.7)        Option  Grantor/Option  Holder  Stock  Option and  Trigger  Payment
             Agreement,  dated as of November 10, 1995, by and among  Interstate
             Power Company and IES Industries Inc.

(99)         WPL  Holdings,  Inc.,  IES  Industries  Inc. and  Interstate  Power
             Company Press Release, dated November 11, 1995.





- ------------------------
       *     Certain of the  schedules  and  exhibits to this  document  are not
             being   filed   herewith.   The   Registrant   agrees  to   furnish
             supplementally  a copy of any such  omitted  schedule or exhibit to
             the Securities and Exchange Commission upon request.

                                      -9-

<PAGE>

























                          AGREEMENT AND PLAN OF MERGER

                                  By and Among

                              WPL HOLDINGS, INC.,

                              IES INDUSTRIES INC.,

                            INTERSTATE POWER COMPANY

                                      and

                             AMW ACQUISITION, INC.




                         Dated as of November 10, 1995

<PAGE>


                               TABLE OF CONTENTS

                                                                           Page

                                   ARTICLE I

                                   THE MERGER

Section 1.1    The Merger.................................................... 2
Section 1.2    Effects of the Merger......................................... 2
Section 1.3    Effective Time of the Merger.................................. 3


                                   ARTICLE II

                              TREATMENT OF SHARES

Section 2.1    Effect of the Merger on Capital Stock......................... 3
               (a)  Cancellation of Certain Common Stock..................... 3
               (b)  Conversion of Certain Common Stock....................... 4
               (c)  No Change in Interstate Preferred Stock.................. 4
               (d)  Conversion of AMW Common Stock........................... 5
Section 2.2    Dissenting Shares............................................. 5
Section 2.3    Issuance of New Certificates.................................. 5
               (a)  Deposit with Exchange Agent.............................. 5
               (b)  Issuance Procedures...................................... 6
               (c)  Distributions with Respect to
                    Unsurrendered Shares..................................... 6
               (d)  No Fractional Securities................................. 7
               (e)  Closing of Common Stock Transfer Books................... 8
               (f)  Termination of Exchange Agent............................ 8


                                  ARTICLE III

                                  THE CLOSING

Section 3.1    The Closing................................................... 8


                                   ARTICLE IV

                     REPRESENTATIONS AND WARRANTIES OF WPL

Section 4.1    Organization and Qualification................................ 8
Section 4.2    Subsidiaries.................................................. 9
Section 4.3    Capitalization............................................... 10
Section 4.4    Authority; Noncontravention; Statutory
               Approvals; Compliance........................................ 11
               (a)  Authority............................................... 11
               (b)  Noncontravention........................................ 12
               (c)  Statutory Approvals..................................... 13

<PAGE>

               (d)  Compliance.............................................. 13
Section 4.5    Reports and Financial Statements............................. 14
Section 4.6    Absence of Certain Changes or Events......................... 15
Section 4.7    Litigation................................................... 15
Section 4.8    Registration Statement and Proxy Statement................... 16
Section 4.9    Tax Matters.................................................. 16
               (a)  Filing of Timely Tax Returns............................ 16
               (b)  Payment of Taxes........................................ 16
               (c)  Tax Reserves............................................ 16
               (d)  Tax Liens............................................... 17
               (e)  Withholding Taxes....................................... 17
               (f)  Extensions of Time for Filing Tax Returns............... 17
               (g)  Waivers of Statute of Limitations....................... 17
               (h)  Expiration of Statute of Limitations.................... 17
               (i)  Audit, Administrative and
                    Court Proceedings....................................... 17
               (j)  Powers of Attorney...................................... 17
               (k)  Tax Rulings............................................. 17
               (l)  Availability of Tax Returns............................. 17
               (m)  Tax Sharing Agreements.................................. 18
               (n)  Code Section 280G....................................... 18
               (o)  Liability for Others.................................... 18
Section 4.10   Employee Matters; ERISA...................................... 18
               (a)  Benefit Plans........................................... 18
               (b)  Contributions........................................... 19
               (c)  Qualification; Compliance............................... 19
               (d)  Liabilities............................................. 19
               (e)  Welfare Plans........................................... 20
               (f)  Documents made Available................................ 20
               (g)  Payments Resulting from Merger.......................... 20
               (h)  Labor Agreements........................................ 21
Section 4.11   Environmental Protection..................................... 21
               (a)  Compliance.............................................. 21
               (b)  Environmental Permits................................... 22
               (c)  Environmental Claims.................................... 22
               (d)  Releases................................................ 22
               (e)  Predecessors............................................ 22
               (f)  Disclosure.............................................. 23
                        (i)  "Environmental Claim........................... 23
                       (ii)  "Environmental Laws............................ 23
                      (iii)  "Hazardous Materials........................... 24
                       (iv)  "Release....................................... 24
Section 4.12   Regulation as a Utility...................................... 24
Section 4.13   Vote Required................................................ 25
Section 4.14   Accounting Matters........................................... 25
Section 4.15   Applicability of Certain Provisions of
               Wisconsin Law, Etc........................................... 25
Section 4.16   Opinion of Financial Advisor................................. 26
Section 4.17   Insurance.................................................... 26
Section 4.18   Ownership of IES and Interstate Common Stock................. 26

                                                  -ii-

<PAGE>

Section 4.19   WPL Rights Agreement......................................... 26
Section 4.20   Operations of Nuclear Power Plant............................ 26


                                   ARTICLE V

                     REPRESENTATIONS AND WARRANTIES OF IES

Section 5.1    Organization and Qualification............................... 27
Section 5.2    Subsidiaries................................................. 27
Section 5.3    Capitalization............................................... 28
Section 5.4    Authority; Noncontravention; Statutory
               Approvals; Compliance........................................ 29
               (a)  Authority............................................... 29
               (b)  Noncontravention........................................ 29
               (c)  Statutory Approvals..................................... 30
               (d)  Compliance.............................................. 30
Section 5.5    Reports and Financial Statements............................. 31
Section 5.6    Absence of Certain Changes or Events......................... 32
Section 5.7    Litigation................................................... 32
Section 5.8    Registration Statement and Proxy Statement................... 33
Section 5.9    Tax Matters.................................................. 33
               (a)  Filing of Timely Tax Returns............................ 33
               (b)  Payment of Taxes........................................ 33
               (c)  Tax Reserves............................................ 33
               (d)  Tax Liens............................................... 34
               (e)  Withholding Taxes....................................... 34
               (f)  Extensions of Time for Filing
                    Tax Returns............................................. 34
               (g)  Waivers of Statute of Limitations....................... 34
               (h)  Expiration of Statute of Limitations.................... 34
               (i)  Audit, Administrative and
                    Court Proceedings....................................... 34
               (j)  Powers of Attorney...................................... 34
               (k)  Tax Rulings............................................. 34
               (l)  Availability of Tax Returns............................. 34
               (m)  Tax Sharing Agreements.................................. 35
               (n)  Code Section 280G....................................... 35
               (o)  Liability for Others.................................... 35
Section 5.10   Employee Matters; ERISA...................................... 35
               (a)  Benefit Plans........................................... 35
               (b)  Contributions........................................... 35
               (c)  Qualification; Compliance............................... 35
               (d)  Liabilities............................................. 36
               (e)  Welfare Plans........................................... 36
               (f)  Documents made Available................................ 36
               (g)  Payments Resulting from Merger.......................... 37
               (h)  Labor Agreements........................................ 37
Section 5.11   Environmental Protection..................................... 38
               (a)  Compliance.............................................. 38
               (b)  Environmental Permits................................... 38
               (c)  Environmental Claims.................................... 38
               (d)  Releases................................................ 39

                                         -iii-

<PAGE>

               (e)  Predecessors............................................ 39
               (f)  Disclosure.............................................. 39
Section 5.12   Regulation as a Utility...................................... 39
Section 5.13   Vote Required................................................ 39
Section 5.14   Accounting Matters........................................... 40
Section 5.15   Applicability of Certain Iowa Law............................ 40
Section 5.16   Opinion of Financial Advisor................................. 40
Section 5.17   Insurance.................................................... 40
Section 5.18   Ownership of WPL and Interstate Common Stock................. 40
Section 5.19   IES Rights Agreement......................................... 40
Section 5.20   Operations of Nuclear Power Plant............................ 41


                                   ARTICLE VI

                  REPRESENTATIONS AND WARRANTIES OF INTERSTATE

Section 6.1    Organization and Qualification............................... 41
Section 6.2    Subsidiaries................................................. 42
Section 6.3    Capitalization............................................... 42
Section 6.4    Authority; Noncontravention; Statutory
               Approvals; Compliance........................................ 43
               (a)  Authority............................................... 43
               (b)  Noncontravention........................................ 44
               (c)  Statutory Approvals..................................... 44
               (d)  Compliance.............................................. 45
Section 6.5    Reports and Financial Statements............................. 45
Section 6.6    Absence of Certain Changes or Events......................... 46
Section 6.7    Litigation................................................... 46
Section 6.8    Registration Statement and Proxy Statement................... 47
Section 6.9    Tax Matters.................................................. 48
               (a)  Filing of Timely Tax Returns............................ 48
               (b)  Payment of Taxes........................................ 48
               (c)  Tax Reserves............................................ 48
               (d)  Tax Liens............................................... 48
               (e)  Withholding Taxes....................................... 48
               (f)  Extensions of Time for Filing
               Tax Returns.................................................. 48
               (g)  Waivers of Statute of Limitations....................... 48
               (h)  Expiration of Statute of Limitations.................... 48
               (i)  Audit, Administrative and
                    Court Proceedings....................................... 49
               (j)  Powers of Attorney...................................... 49
               (k)  Tax Rulings............................................. 49
               (l)  Availability of Tax Returns............................. 49
               (m)  Tax Sharing Agreements.................................. 49
               (n)  Code Section 280G....................................... 49
               (o)  Liability for Others.................................... 49
Section 6.10   Employee Matters; ERISA...................................... 49
               (a)  Benefit Plans........................................... 49
               (b)  Contributions........................................... 50
               (c)  Qualification; Compliance............................... 50
               (d)  Liabilities............................................. 50
               (e)  Welfare Plans........................................... 50

                                          -iv-
<PAGE>

               (f)  Documents made Available................................ 51
               (g)  Payments Resulting from Merger.......................... 51
               (h)  Labor Agreements........................................ 52
Section 6.11   Environmental Protection..................................... 52
               (a)  Compliance.............................................. 52
               (b)  Environmental Permits................................... 53
               (c)  Environmental Claims.................................... 53
               (d)  Releases................................................ 53
               (e)  Predecessors............................................ 53
               (f)  Disclosure.............................................. 54
Section 6.12   Regulation as a Utility...................................... 54
Section 6.13   Vote Required................................................ 54
Section 6.14   Accounting Matters........................................... 54
Section 6.15   Applicability of Certain Delaware Law, Etc................... 54
Section 6.16   Opinion of Financial Advisor................................. 55
Section 6.17   Insurance.................................................... 55
Section 6.18   Ownership of WPL and IES Common Stock........................ 55


                                  ARTICLE VII

                     CONDUCT OF BUSINESS PENDING THE MERGER

Section 7.1    Covenants of the Parties..................................... 55
Section 7.2    Ordinary Course of Business.................................. 55
Section 7.3    Dividends.................................................... 56
Section 7.4    Issuance of Securities....................................... 58
Section 7.5    Charter Documents............................................ 59
Section 7.6    No Acquisitions.............................................. 59
Section 7.7    Capital Expenditures and Emission Allowances................. 60
Section 7.8    No Dispositions.............................................. 60
Section 7.9    Indebtedness................................................. 60
Section 7.10   Compensation, Benefits....................................... 61
Section 7.11   1935 Act..................................................... 61
Section 7.12   Transmission, Generation..................................... 62
Section 7.13   Accounting................................................... 62
Section 7.14   Pooling...................................................... 62
Section 7.15   Taxfree Status............................................... 62
Section 7.16   Affiliate Transactions....................................... 62
Section 7.17   Cooperation, Notification.................................... 63
Section 7.18   Thirdparty Consents.......................................... 63
Section 7.19   No Breach.................................................... 64
Section 7.20   Taxexempt Status............................................. 64
Section 7.21   Transition Steering Team..................................... 64
Section 7.22   Company Actions.............................................. 64
Section 7.23   Tax Matters.................................................. 64
Section 7.24   Discharge of Liabilities..................................... 65
Section 7.25   Contracts.................................................... 65
Section 7.26   Insurance.................................................... 65
Section 7.27   Permits...................................................... 65

                                      -v-

<PAGE>

                                  ARTICLE VIII

                             ADDITIONAL AGREEMENTS

Section 8.1    Access to Information........................................ 66
Section 8.2    Joint Proxy Statement and Registration
               Statement.................................................... 66
               (a)  Preparation and Filing.................................. 66
               (b)  Letter of WPL's Accountants............................. 67
               (c)  Letter of IES's Accountants............................. 67
               (d)  Letter of Interstate's Accountants...................... 67
               (e)  Fairness Opinions....................................... 68
Section 8.3    Regulatory Matters........................................... 68
               (a)  HSR Filings............................................. 68
               (b)  Other Regulatory Approvals.............................. 68
Section 8.4    Shareholder Approval......................................... 69
               (a)  Approval of IES Shareholders............................ 69
               (b)  Approval of WPL Shareholders............................ 69
               (c)  Approval of Interstate Shareholders..................... 69
               (d)  Meeting Date............................................ 70
               (e)  Fairness Opinions Not Withdrawn......................... 70
Section 8.5    Director and Officer Indemnification......................... 70
               (a)  Indemnification......................................... 70
               (b)  Insurance............................................... 71
               (c)  Successors.............................................. 71
               (d)  Survival of Indemnification............................. 72
               (e)  Benefit................................................. 72
Section 8.6    Disclosure Schedules......................................... 72
Section 8.7    Public Announcements......................................... 73
Section 8.8    Rule 145 Affiliates.......................................... 73
Section 8.9    Employee Agreements and Workforce Matters.................... 73
               (a)  Certain Employee Agreements............................. 73
               (b)  Workforce Matters....................................... 73
Section 8.10   Employee Benefit Plans....................................... 74
Section 8.11   Stock Option and Other Stock Plans........................... 75
               (a)  Amendment of Stock Plans and Agreements................. 75
               (b)  Company Action.......................................... 76
Section 8.12   No Solicitations............................................. 76
Section 8.13   Company Board of Directors................................... 77
Section 8.14   Company Officers............................................. 78
Section 8.15   Employment Contracts......................................... 80
Section 8.16   PostMerger Operations........................................ 80
Section 8.17   Expenses..................................................... 80
Section 8.18   Further Assurances........................................... 81
Section 8.19   Charter and Bylaw Amendments................................. 81


                                   ARTICLE IX

                                   CONDITIONS

Section 9.1    Conditions to each Party's Obligation to Effect
               the Merger................................................... 82
               (a)  Shareholder Approvals................................... 82

                                          -vi-
<PAGE>

               (b)  No Injunction........................................... 82
               (c)  Registration Statement.................................. 82
               (d)  Listing of Shares....................................... 82
               (e)  Statutory Approvals..................................... 82
               (f)  Pooling................................................. 83

Section 9.2    Further Conditions to Obligation of IES to
               Effect the IES Merger........................................ 83
               (a)  Performance of Obligations.............................. 83
               (b)  Representations and Warranties.......................... 83
               (c)  Closing Certificates.................................... 83
               (d)  Material Adverse Effect................................. 83
               (e)  Tax Opinions............................................ 84
               (f)  Required Consents....................................... 84
               (g)  Affiliate Agreements.................................... 84
Section 9.3    Further Conditions to Obligation of
               Interstate to Effect the Interstate Merger................... 84
               (a)  Performance of Obligations.............................. 84
               (b)  Representations and Warranties.......................... 84
               (c)  Closing Certificates.................................... 85
               (d)  Material Adverse Effect................................. 85
               (e)  Tax Opinions............................................ 85
               (f)  Required Consents....................................... 85
               (g)  Affiliate Agreements.................................... 85
Section 9.4    Further Conditions to Obligation of WPL to
               Effect the Merger............................................ 86
               (a)  Performance of Obligations.............................. 86
               (b)  Representations and Warranties.......................... 86
               (c)  Closing Certificates.................................... 86
               (d)  Material Adverse Effect................................. 86
               (e)  Tax Opinions............................................ 86
               (f)  Required Consents....................................... 87
               (g)  Affiliate Agreements.................................... 87


                                   ARTICLE X

                       TERMINATION, AMENDMENT AND WAIVER

Section 10.1   Termination.................................................. 87
Section 10.2   Effect of Termination........................................ 92
Section 10.3   Termination Fee; Expenses.................................... 92
               (a)  Termination Fee Upon Breach or
                    Withdrawal of Approval.................................. 92
               (b)  Additional Termination Fee.............................. 93
               (c)  Second Termination Fee.................................. 94
               (d)  Expenses................................................ 95
               (e)  Limitation on Termination
                    Fees.................................................... 95
               (f)  Certain Definitions..................................... 96
                    (i)  Participation Percentage........................... 96
                   (ii)  Target Party....................................... 96
Section 10.4   Amendment.................................................... 96
Section 10.5   Waiver....................................................... 97

                                                  -vii-

<PAGE>

                                   ARTICLE XI

                               GENERAL PROVISIONS

Section 11.1   Nonsurvival; Effect of Representations and
               Warranties................................................... 97
Section 11.2   Brokers...................................................... 98
Section 11.3   Notices...................................................... 98
Section 11.4   Miscellaneous................................................ 99
Section 11.5   Interpretation.............................................. 100
Section 11.6   Counterparts; Effect........................................ 100
Section 11.7   Parties in Interest......................................... 100
Section 11.8   Binding Effect; Benefits.................................... 101
Section 11.9   WAIVER OF JURY TRIAL AND CERTAIN DAMAGES.................... 101
Section 11.10  Enforcement................................................. 101

EXHIBITS

Exhibit A         - WPL/IES  Stock Option  Agreement
Exhibit B         - WPL/Interstate  Stock Option  Agreement
Exhibit C         - IES/WPL  Stock  Option  Agreement
Exhibit D         - IES/Interstate  Stock Option Agreement
Exhibit E         - Interstate/WPL  Stock Option Agreement
Exhibit F         - Interstate/IES  Stock Option Agreement
Exhibit 1.3       - Plan of Merger
Exhibit 8.8(a)    - Affiliate Agreement of WPL
Exhibit 8.8(b)    - Affiliate Agreement of IES and Interstate
Exhibit 8.15.1    - WPL Employment  Contract with Mr. Liu
Exhibit 8.15.2    - WPL Employment Contract with Mr. Davis
Exhibit 8.15.3    - WPL Employment Contract with Mr. Stoppelmoor
Exhibit 8.15.4    - WPL Employment Contract with Mr. Chase
Exhibit 8.15.5    - WPL Employment Contract with Mr. Fisher

                                     -viii-

<PAGE>

                             INDEX OF DEFINED TERMS

TERM.................................................................... PAGE #

1935 Act...................................................................   9

Affiliate..................................................................  25
Affiliate Agreement........................................................  73
Affiliated Employees.......................................................  74
Agreement..................................................................   1
AMW........................................................................   1
AMW Common Stock...........................................................   5
Atomic Energy Act..........................................................  14

Business Combination.......................................................  88
Business Combination Proposal..............................................  77

Canceled Common Shares.....................................................   6
Certificates...............................................................   6
Class I....................................................................  77
Class II...................................................................  77
Class III..................................................................  77
Closing....................................................................   8
Closing Agreement..........................................................  18
Closing Date...............................................................   8
Code.......................................................................   1
Company....................................................................   1
Confidentiality Agreement..................................................  66

DAEC.......................................................................  41
DGCL.......................................................................   3
Disclosure Schedules.......................................................  72
Dissenting Shares..........................................................   5
DOE........................................................................  14

Effective Time.............................................................   3
Environmental Claim........................................................  23
Environmental Laws.........................................................  23
Environmental Permits......................................................  22
ERISA......................................................................  19
Exchange Act...............................................................  14
Exchange Agent.............................................................   5

FERC.......................................................................  14
Final Order................................................................  82

GAAP.......................................................................   2
Governmental Authority.....................................................  13

Hazardous Materials........................................................  24
HSR Act....................................................................  68

IBCA.......................................................................   3

                                      -ix-

<PAGE>

Indemnified Liabilities....................................................  70
Indemnified Party..........................................................  70
Indemnified Parties........................................................  70
IES........................................................................   1
IES Benefit Plans..........................................................  35
IES Common Stock...........................................................   3
IES Disclosure Schedule....................................................  27
IES Directors..............................................................  77
IES Dissenting Shares......................................................   5
IES Financial Statements...................................................  32
IES/Interstate Stock Option Agreement......................................   1
IES Joint Venture..........................................................  28
IES Material Adverse Effect................................................  27
IES Merger.................................................................   2
IES Preferred Stock........................................................  28
IES Ratio..................................................................   4
IES Required Consents......................................................  30
IES Required Statutory Approvals...........................................  30
IES Rights Agreement.......................................................  41
IES SEC Reports............................................................  31
IES Special Meeting........................................................  68
IES Stock Awards...........................................................  75
IES Stock Option...........................................................  75
IES Shareholders' Approval.................................................  39
IES Subsidiary.............................................................  28
IES/WPL Stock Option Agreement.............................................   1
Initial Termination Date...................................................  87
Interstate.................................................................   1
Interstate Benefit Plans...................................................  49
Interstate Common Stock....................................................   4
Interstate Directors......................................................   78
Interstate Disclosure Schedule............................................   41
Interstate Dissenting Shares...............................................   5
Interstate Financial Statements............................................  46
Interstate/IES Stock Option Agreement......................................   1
Interstate Joint Venture...................................................  42
Interstate Material Adverse Effect.........................................  41
Interstate Merger..........................................................   2
Interstate Preferred Stock.................................................   4
Interstate Ratio...........................................................   4
Interstate Required Consents...............................................  44
Interstate Required Statutory Approval.....................................  44
Interstate SEC Reports.....................................................  46
Interstate Shareholders' Approval..........................................  54
Interstate Special Meeting.................................................  69
Interstate Subsidiary......................................................  42
Interstate/WPL Stock Option Agreement......................................   1
IRS........................................................................  19

Joint Proxy/Registration Statement.........................................  66
Joint Venture..............................................................  10


Kewaunee...................................................................  26

                                      -x-

<PAGE>

Knowledge..................................................................   3

Merger.....................................................................   2
Merrill....................................................................  26
Morgan.....................................................................  40

Nonregulated Company.......................................................  80
Non-Target Party...........................................................  94
NRC........................................................................  14
NYSE.......................................................................   7

Payment Date...............................................................  57
Participation Percentage...................................................  95
PBGC.......................................................................  19
Permits....................................................................  13
Plan of Merger.............................................................   3
Power Act..................................................................  14
Proxy Statement............................................................  16

Registration Statement.....................................................  16
Release....................................................................  24
Representatives............................................................  66

Salomon....................................................................  55
SEC........................................................................   2
Second Target Party........................................................  94
Securities Act.............................................................  14
Stock Option Agreements....................................................   1
Stock Plans................................................................  76
Subsidiary.................................................................  10

Target Party...............................................................  96
Tax Return.................................................................  18
Tax Ruling.................................................................  18
Taxes......................................................................  18
Three-Year Period.......................................................... 100
Transition Team............................................................  64

Utilities..................................................................  28
Utilities Common Stock.....................................................  28
Utilities Preferred Stock..................................................  28

Violation..................................................................  12

WBCL.......................................................................   3
WP&LC......................................................................  10
WP&LC Common Stock.........................................................  10
WP&LC Preferred Stock......................................................  10
WPL........................................................................   1
WPL Benefit Plans..........................................................  19
WPL Common Stock...........................................................   4
WPL Directors..............................................................  78
WPL Disclosure Schedule....................................................  78
WPL Financial Statements...................................................  15

                                      -xi-

<PAGE>

WPL/IES Stock Option Agreement.............................................   1
WPL/Interstate Stock Option Agreement......................................   1
WPL Joint Venture..........................................................  10
WPL Material Adverse Effect................................................   9
WPL Rights.................................................................   4
WPL Rights Agreement.......................................................   4
WPL Required Consents......................................................  12
WPL Required Statutory Approvals...........................................  13
WPL SEC Reports............................................................  14
WPL Shareholders' Approval.................................................  25
WPL Special Meeting.......................................................   69
WPL Subsidiary.............................................................  10
WPS........................................................................  26





                                     -xii-

<PAGE>

                  THIS  AGREEMENT  AND PLAN OF MERGER,  dated as of November 10,
1995 (this  "Agreement"),  by and among WPL  Holdings,  Inc., a holding  company
incorporated  under the laws of the State of Wisconsin  ("WPL"),  IES Industries
Inc.,  a  holding  company  incorporated  under  the  laws of the  State of Iowa
("IES"),  Interstate  Power Company,  an operating  public utility  incorporated
under  the laws of the State of  Delaware  ("Interstate")  and AMW  Acquisition,
Inc., a wholly-owned  subsidiary of WPL incorporated under the laws of the State
of  Delaware  ("AMW",  and  together  with WPL,  IES and  Interstate,  after the
Effective Time (as hereinafter defined), the "Company"),

                              W I T N E S S E T H:

                  WHEREAS, WPL, IES and Interstate have determined that it would
be in their  respective best interests and in the interests of their  respective
shareholders to effect the transactions contemplated by this Agreement;

                  WHEREAS,  in furtherance  thereof,  the  respective  Boards of
Directors of WPL, IES,  Interstate  and AMW have approved this Agreement and the
Merger (as defined in Section 1.1 below) on the terms and  conditions  set forth
in this Agreement;

                  WHEREAS,  the Board of  Directors  of WPL has approved and WPL
has executed  agreements  with IES in the form of Exhibit A (the "WPL/IES  Stock
Option Agreement"), and Interstate in the form of Exhibit B (the "WPL/Interstate
Stock Option Agreement"), the Board of Directors of IES has approved and IES has
executed agreements with WPL in the form of Exhibit C (the "IES/WPL Stock Option
Agreement"),  and Interstate in the form of Exhibit D (the "IES/Interstate Stock
Option  Agreement"),  and the Board of Directors of Interstate  has approved and
Interstate  has  executed  agreements  with  WPL in the form of  Exhibit  E (the
"Interstate/WPL  Stock Option  Agreement") and IES in the form of Exhibit F (the
"Interstate/IES  Stock  Option  Agreement")  (collectively,  the  "Stock  Option
Agreements") whereby each of WPL, IES and Interstate,  respectively, has granted
to the others an option to purchase  shares of its common stock on the terms and
conditions provided in such agreements;

                  WHEREAS, for Federal income tax purposes,  it is intended that
the  transactions  contemplated  herein  will be  reorganizations  described  in
Section  368(a) of the Internal  Revenue Code of 1986,  as amended (the "Code"),
and the regulations thereunder, and that the parties hereto and their respective
shareholders will recognize no gain or loss for Federal income tax purposes as a
result of the consummation of the Merger;



<PAGE>



                  WHEREAS,  for  accounting  purposes,  it is intended  that the
Merger  will be  accounted  for as a pooling of  interests  in  accordance  with
generally accepted accounting  principles applied on a consistent basis ("GAAP")
and  applicable  regulations  of the  Securities  and Exchange  Commission  (the
"SEC");

                  NOW,  THEREFORE,  in  consideration  of the  premises  and the
representations,  warranties,  covenants and agreements  contained  herein,  the
parties hereto, intending to be legally bound hereby, agree as follows:


                                   ARTICLE I

                                   THE MERGER

                  Section 1.1  The Merger.  Upon the terms and subject to
the conditions of this Agreement:

                  (a)  at the Effective Time:

                      (i) IES  shall be  merged  with  and  into  WPL (the  "IES
         Merger") in  accordance  with the laws of the States of  Wisconsin  and
         Iowa;

                      (ii) AMW shall be  merged  with and into  Interstate  (the
         "Interstate  Merger")  in  accordance  with  the  laws of the  State of
         Delaware;

                      (iii) The IES Merger, together with the Interstate Merger,
         are collectively referred to herein as the "Merger."

                  (b) WPL shall be the surviving  corporation of the IES Merger,
and Interstate shall be the surviving  corporation of the Interstate Merger, and
each shall continue its  respective  corporate  existence  under the laws of the
States of Wisconsin and Delaware, respectively; and

                  (c) the effects and the consequences of the Merger shall be as
set forth in Section 1.2.

                  Section 1.2 Effects of the Merger. At the Effective Time,

                  (a) the surviving  corporation  of the IES Merger shall change
its name to Interstate Energy Corporation,

                  (b) the  Restated  Articles  of  Incorporation  of WPL,  as in
effect  immediately  prior to the Effective Time, except as set forth in Section
1.2(a)  above,  shall be the Restated  Articles of  Incorporation  of WPL as the
surviving corporation in the IES Merger until thereafter amended,


                                      -2-

<PAGE>



                  (c) the By-laws of WPL, as in effect  immediately prior to the
Effective Time, shall be the By-laws of WPL as the surviving  corporation in the
IES Merger until thereafter amended,

                  (d) the Restated  Certificate of  Incorporation of Interstate,
as in effect  immediately  prior to the  Effective  Time,  shall be the Restated
Certificate of Incorporation  of Interstate as the surviving  corporation in the
Interstate Merger until thereafter amended, and

                  (e) the By-laws of Interstate,  as in effect immediately prior
to the  Effective  Time,  shall be the By-laws of  Interstate  as the  surviving
corporation in the Interstate Merger until thereafter amended.

Subject to the  foregoing,  the  additional  effects  of the Merger  shall be as
provided in the applicable  provisions of the Wisconsin Business Corporation Law
(the "WBCL"),  the Iowa Business  Corporation  Act (the "IBCA") and the Delaware
General Corporation Law (the "DGCL").

                  Section 1.3 Effective Time of the Merger.  On the Closing Date
(as hereinafter  defined),  articles and certificates of merger together, in the
case of the IES Merger, with a Plan of Merger in substantially the form attached
hereto as Exhibit 1.3, which Plan of Merger is incorporated by reference  herein
and deemed a part hereof (the "Plan of Merger"), complying with the requirements
of the WBCL,  the IBCA and the DGCL,  shall be executed by WPL, IES,  Interstate
and AMW and  shall be  filed by WPL and  Interstate,  as  appropriate,  with the
Secretary  of  State  of the  State of  Wisconsin  pursuant  to the WBCL and the
Secretary of State of the State of Iowa pursuant to the IBCA, in the case of the
IES Merger,  and the Secretary of State of the State of Delaware pursuant to the
DGCL, in the case of the Interstate Merger. The Merger shall become effective on
the later of the times  (the  "Effective  Time")  specified  in the  appropriate
articles and certificates of merger filed with respect to the IES Merger and the
Interstate Merger, respectively.


                                   ARTICLE II

                              TREATMENT OF SHARES

                  Section  2.1  Effect of the Merger on  Capital  Stock.  At the
Effective  Time,  by virtue of the Merger and  without any action on the part of
any holder of any capital stock of WPL, IES, Interstate or AMW:

                  (a)  Cancellation of Certain Common Stock.

                      (i) Each share of Common Stock,  no par value, of IES (the
         "IES Common  Stock") that is owned by IES, WPL or  Interstate or any of
         their respective Subsidiaries (as

                                      -3-

<PAGE>



         hereinafter defined) shall be canceled and shall cease to exist, and

                      (ii) each  share of  Common  Stock,  par  value  $3.50 per
         share, of Interstate (the  "Interstate  Common Stock") that is owned by
         IES, WPL or Interstate or any of their respective Subsidiaries shall be
         canceled and shall cease to exist.

                  (b)  Conversion of Certain Common Stock.

                      (i) Each issued and outstanding  share of IES Common Stock
         (other  than shares  canceled  pursuant  to Section  2.1(a)(i)  and IES
         Dissenting Shares (as hereinafter defined)) shall be converted into the
         right to  receive  0.98  (the "IES  Ratio")  duly  authorized,  validly
         issued,  fully paid and nonassessable  (except as otherwise provided in
         Section  180.0622(2)(b)  of the WBCL) shares of Common Stock, par value
         $.01 per share, of WPL ("WPL Common Stock"),  including, if applicable,
         associated  rights (the "WPL Rights") to purchase  shares of WPL Common
         Stock  pursuant to the terms of that certain Rights  Agreement  between
         WPL and Morgan  Shareholder  Services  Trust  Company,  as Rights Agent
         thereunder, dated as of February 22, 1989 (the "WPL Rights Agreement").
         Until the  Distribution  Date (as defined in the WPL Rights  Agreement)
         all  references  in this  Agreement  to the WPL Common  Stock  shall be
         deemed to include the associated WPL Rights.

                      (ii)  Each  issued  and  outstanding  share of  Interstate
         Common   Stock  (other  than  shares   canceled   pursuant  to  Section
         2.1(a)(ii))  shall be  converted  into the right to  receive  1.11 (the
         "Interstate  Ratio") duly  authorized,  validly issued,  fully paid and
         nonassessable  (except as otherwise provided in Section  180.0622(2)(b)
         of the WBCL) shares of WPL Common Stock.

                      (iii)  Upon  such  conversions  and  except  as  otherwise
         provided  in  Section  2.2,  all such  shares of IES  Common  Stock and
         Interstate  Common Stock shall be canceled and cease to exist, and each
         holder of a certificate  formerly  representing  any such shares of IES
         Common Stock or Interstate Common Stock shall cease to have rights with
         respect  thereto,  except the right to receive the shares of WPL Common
         Stock to be issued in consideration therefor upon the surrender of such
         certificate  in  accordance  with  Section  2.3 and any cash in lieu of
         fractional shares of WPL Common Stock.

                  (c) No Change in Interstate  Preferred Stock.  Each issued and
outstanding  share  of  Preferred  Stock,  $50 par  value,  of  Interstate  (the
"Interstate  Preferred  Stock") shall be unchanged as a result of the Interstate
Merger and shall remain outstanding thereafter.

                                      -4-

<PAGE>




                  (d)  Conversion  of AMW  Common  Stock.  All of the  shares of
Common Stock,  par value $0.01 per share, of AMW (the "AMW Common Stock") issued
and outstanding  immediately prior to the Effective Time shall be converted into
that number of shares of Interstate  Common Stock (as the surviving  corporation
in the Interstate  Merger) which shall be equivalent to the aggregate  number of
shares of Interstate  Common Stock (exclusive of the shares canceled pursuant to
Section  2.1(a)(ii))  issued and outstanding  immediately prior to the Effective
Time.  From  and  after  the  Effective  Time,  each   outstanding   certificate
theretofore  representing  shares of AMW  Common  Stock  shall be deemed for all
purposes  to  evidence  ownership  of and to  represent  the number of shares of
Interstate  Common  Stock into which such shares of AMW Common  Stock shall have
been converted.

                  Section 2.2   Dissenting Shares.

                  (a) Shares of IES Common Stock held by any holder  entitled to
relief as a dissenting  shareholder under Section 490.1302 of the IBCA (the "IES
Dissenting  Shares") shall not be converted into the right to receive WPL Common
Stock  in the IES  Merger,  but  shall  be  canceled  and  converted  into  such
consideration  as may  be due  with  respect  to  such  shares  pursuant  to the
applicable  provisions of Sections 490.1320 through 490.1330 of the IBCA, unless
and  until  the  right of such  holder  to  receive  fair  cash  value  for such
Dissenting  Shares  (as  hereinafter  defined)  terminates  in  accordance  with
Sections  490.1320  through  490.1330 of the IBCA.  If such right is  terminated
otherwise  than by the  purchase of such shares by WPL,  then such shares  shall
cease to be  Dissenting  Shares and shall  represent  the right to  receive  WPL
Common Stock, as provided in Section 2.1(b)(i).

                  (b) Shares of  Interstate  Preferred  Stock held by any holder
entitled to relief as a  dissenting  shareholder  under  Section 262 of the DGCL
(the "Interstate  Dissenting Shares," and,  collectively with the IES Dissenting
Shares,  the  "Dissenting  Shares")  shall be canceled and  converted  into such
consideration  as may  be due  with  respect  to  such  shares  pursuant  to the
applicable  provisions  of Section 262 of the DGCL.  If such right is terminated
otherwise  than by the  purchase of such shares by WPL,  then such shares  shall
cease to be Dissenting Shares and shall remain outstanding.

                  Section 2.3  Issuance of New Certificates.

                  (a) Deposit with Exchange Agent. As soon as practicable  after
the Effective  Time,  WPL shall  deposit with such bank,  trust company or other
appropriate  entity mutually agreeable to WPL, IES and Interstate (the "Exchange
Agent"), certificates representing shares of WPL Common Stock required to effect
the issuances  referred to in Section 2.1, together with cash payable in respect
of fractional shares pursuant to Section 2.3(d).

                                      -5-

<PAGE>




                  (b)  Issuance Procedures.

                      (i) As soon as practicable  after the Effective  Time, the
         Exchange  Agent shall mail to each holder of record of a certificate or
         certificates  (the  "Certificates")  which  immediately  prior  to  the
         Effective Time  represented  outstanding  shares of IES Common Stock or
         Interstate  Common  Stock,  as  the  case  may  be  (collectively,  the
         "Canceled  Common  Shares"),  that were canceled and became instead the
         right to receive  shares of WPL Common Stock pursuant to Section 2.1(b)
         and the  Plan of  Merger,  (A) a letter  of  transmittal  (which  shall
         specify that delivery shall be effected,  and risk of loss and title to
         the  Certificates   shall  pass,  only  upon  actual  delivery  of  the
         Certificates to the Exchange  Agent),  and (B)  instructions for use in
         effecting   the   surrender  of  the   Certificates   in  exchange  for
         certificates representing WPL Common Stock.

                      (ii) Upon surrender of a Certificate to the Exchange Agent
         for  cancellation (or to such other agent or agents as may be appointed
         by agreement of WPL, IES and Interstate), together with a duly executed
         letter of  transmittal  and such other  documents as the Exchange Agent
         shall  require,  the holder of such  Certificate  shall be  entitled to
         receive a certificate  representing  that number of whole shares of WPL
         Common Stock which such holder has the right to receive pursuant to the
         provisions of this Article II and the Plan of Merger. In the event of a
         transfer of ownership of Canceled Common Shares which is not registered
         in the  transfer  records of IES or  Interstate,  as the case may be, a
         certificate  representing  the  proper  number of shares of WPL  Common
         Stock may be issued to a  transferee  if the  Certificate  representing
         such  Canceled  Common  Shares  is  presented  to the  Exchange  Agent,
         accompanied  by all  documents  required  to  evidence  and effect such
         transfer and by evidence  satisfactory  to the Exchange  Agent that any
         applicable stock transfer taxes have been paid.

                      (iii) Until  surrendered as  contemplated  by this Section
         2.3, each  Certificate  shall be deemed at any time after the Effective
         Time to  represent  only the right to receive upon such  surrender  the
         certificate  representing  WPL  Common  Stock  and  cash in lieu of any
         fractional shares of WPL Common Stock contemplated by this Section 2.3.

                  (c)  Distributions with Respect to Unsurrendered Shares.

                      (i) No dividends or other  distributions  declared or made
         after the  Effective  Time with  respect to shares of WPL Common  Stock
         with a record date after the Effective Time shall be paid to the holder
         of any  unsurrendered  Certificate  with  respect  to the shares of WPL
         Common Stock represented

                                      -6-

<PAGE>



         thereby and no cash payment in lieu of fractional  shares shall be paid
         to any such  holder  pursuant  to  Section  2.3(d)  until the holder of
         record of such  Certificate  (or a  transferee  as described in Section
         2.3(b)) shall surrender such Certificate.

                      (ii) Subject to the effect of unclaimed property,  escheat
         and other applicable laws, following surrender of any such Certificate,
         there shall be paid to the record holders (or a transferee as described
         in Section 2.3(b)) of the certificates representing whole shares of WPL
         Common Stock issued in consideration therefor, without interest,

                           (A) at the time of such surrender, the amount of cash
                  in lieu of a  fractional  share of WPL  Common  Stock to which
                  such holder (or  transferee)  is entitled  pursuant to Section
                  2.3(d) and the amount of dividends or other distributions with
                  a record  date  after the  Effective  Time  which  theretofore
                  became  payable  but which  were not paid by reason of Section
                  2.3(c)(i)  with  respect  to such  whole  shares of WPL Common
                  Stock, and

                           (B) at the  appropriate  payment date,  the amount of
                  dividends or other  distributions with a record date after the
                  Effective  Time but  prior to  surrender  and a  payment  date
                  subsequent  to  surrender  payable  with respect to such whole
                  shares of WPL Common Stock.

                  (d)  No Fractional Securities.

                      (i) Notwithstanding any other provision of this Agreement,
         no certificates or scrip  representing  fractional shares of WPL Common
         Stock shall be issued upon the surrender  for exchange of  Certificates
         and such fractional  shares shall not entitle the owner thereof to vote
         as, or to any other rights of, a holder of WPL Common Stock.

                      (ii) A holder of IES  Common  Stock or  Interstate  Common
         Stock who would  otherwise  have been  entitled to receive a fractional
         share of WPL Common  Stock shall be entitled to receive a cash  payment
         in lieu of such  fractional  share in an  amount  equal to the  product
         (rounded to the nearest cent) of such fraction  (rounded to the nearest
         thousandth) multiplied by the average of the last reported sales price,
         regular  way,  per share of WPL  Common  Stock,  on the New York  Stock
         Exchange ("NYSE") Composite Tape for the ten business days prior to and
         including the last  business day prior to the  Effective  Time on which
         WPL Common Stock was traded on the NYSE, without any interest thereon.


                                      -7-

<PAGE>



                   (e) Closing of Common Stock  Transfer  Books.  From and after
the Effective  Time, the stock transfer books of IES and Interstate with respect
to shares of IES Common Stock and Interstate Common Stock issued and outstanding
prior to the  Effective  Time shall be closed and no transfer of any such shares
shall  thereafter  be made.  If,  after the  Effective  Time,  Certificates  are
presented  to WPL or  Interstate,  they  shall be  canceled  and  exchanged  for
certificates  representing the appropriate  number of shares of WPL Common Stock
as provided in this Section 2.3.

                   (f)   Termination  of  Exchange   Agent.   Any   certificates
representing  WPL Common Stock  deposited  with the Exchange  Agent  pursuant to
Section  2.3(a)  and not  exchanged  within one year  after the  Effective  Time
pursuant to this  Section 2.3 shall be  returned  by the  Exchange  Agent to the
Company,  which shall  thereafter act as Exchange  Agent.  All funds held by the
Exchange  Agent for payment to the  holders of  unsurrendered  Certificates  and
unclaimed  at the end of one year from the  Effective  Time shall be returned to
the Company,  after which time any holder of  unsurrendered  Certificates  shall
look as a general  creditor  only to the  Company  for  payment of such funds to
which such holder may be due,  subject to applicable  law. The Company shall not
be liable to any person for such shares or funds  delivered to a public official
pursuant to any applicable abandoned property, escheat or similar law.


                                  ARTICLE III

                                  THE CLOSING

                  Section  3.1 The  Closing.  The  closing  of the  Merger  (the
"Closing")  shall  take  place  at the  offices  of  Foley &  Lardner,  777 East
Wisconsin Avenue,  Milwaukee,  Wisconsin,  at 10:00 a.m.  (Milwaukee,  Wisconsin
local time) on the second business day  immediately  following the date on which
the last of the  conditions  set forth in  Article  IX hereof  is  fulfilled  or
waived,  or at such  other  time and date and place as WPL,  IES and  Interstate
shall mutually agree (the "Closing Date").


                                   ARTICLE IV

                     REPRESENTATIONS AND WARRANTIES OF WPL

                  WPL represents and warrants to IES and Interstate as follows:

                  Section  4.1  Organization  and  Qualification.  Except as set
forth in Section 4.1 of the Disclosure  Schedule to this Agreement  prepared and
delivered  by WPL  (the  "WPL  Disclosure  Schedule"),  each  of WPL and the WPL
Subsidiaries (as hereinafter  defined) is a corporation duly organized,  validly
existing and in

                                      -8-

<PAGE>



good  standing  (to the  extent  applicable)  under  the laws of its  respective
jurisdiction of incorporation or organization, has all requisite corporate power
and  authority,  and has been duly  authorized  by all  necessary  approvals and
orders to own,  lease and operate its assets and properties to the extent owned,
leased and operated  and to carry on its  business as it is now being  conducted
and is duly  qualified  and in good  standing (to the extent  applicable)  to do
business in each respective  jurisdiction in which the nature of its business or
the ownership or leasing of its assets and properties  makes such  qualification
necessary, other than in such jurisdictions where the failure to be so qualified
and in good  standing  would  not,  when  taken  together  with all  other  such
failures,   have  a  material  adverse  effect  on  the  business,   operations,
properties,  assets,  condition  (financial  or  otherwise),  or the  results of
operations  of  WPL  and  the  WPL  Subsidiaries  taken  as a  whole  or on  the
consummation of the  transactions  contemplated  hereby (a "WPL Material Adverse
Effect").

                  Section 4.2  Subsidiaries.

                  (a) Section 4.2 of the WPL  Disclosure  Schedule  sets forth a
description  as of the  date  hereof,  of all WPL  Subsidiaries  and  WPL  Joint
Ventures, including (i) the name of each such entity and WPL's interest therein,
and  (ii) a brief  description  of the  principal  line  or  lines  of  business
conducted by each such entity.

                  (b) Except as set forth in Section  4.2 of the WPL  Disclosure
Schedule,  none of the WPL  Subsidiaries  or WPL  Joint  Ventures  is a  "public
utility company," a "holding company," a "subsidiary  company" or an "affiliate"
of any public utility  company within the meaning of Section  2(a)(5),  2(a)(7),
2(a)(8) or  2(a)(11)  of the Public  Utility  Holding  Company  Act of 1935,  as
amended (the "1935 Act"), respectively.

                  (c) Except as set forth in Section  4.2 of the WPL  Disclosure
Schedule,  all of the issued and outstanding shares of capital stock of each WPL
Subsidiary  are duly  authorized,  validly  issued,  fully  paid,  nonassessable
(except as otherwise provided in Section 180.0622(2)(b) of the WBCL) and free of
preemptive rights, and are owned, directly or indirectly,  by WPL free and clear
of any liens, claims,  encumbrances,  security interests,  equities, charges and
options of any nature  whatsoever,  and there are no outstanding  subscriptions,
options,  calls,  contracts,   voting  trusts,  proxies  or  other  commitments,
understandings,  restrictions,  arrangements,  rights or warrants, including any
right of conversion or exchange under any  outstanding  security,  instrument or
other agreement,  obligating any such WPL Subsidiary to issue,  deliver or sell,
or cause to be  issued,  delivered  or sold,  additional  shares of its  capital
stock, or granting to any person other than WPL or a WPL Subsidiary any right to
participate  in its dividends or earnings or  obligating it to grant,  extend or
enter into any such agreement or commitment.

                                      -9-

<PAGE>




                  (d)  As used in this Agreement,

                      (i) "Subsidiary" of a person shall mean any corporation or
         other entity (including  partnerships and other business  associations)
         of which at least a majority of the outstanding  capital stock or other
         voting securities  having voting power under ordinary  circumstances to
         elect  directors  or  similar  members  of the  governing  body of such
         corporation  or  entity  shall  at  the  time  be  held,   directly  or
         indirectly, by such person or entity;

                      (ii) "WPL Subsidiary" shall mean any Subsidiary of WPL;

                      (iii) "Joint Venture" of a person or entity shall mean any
         corporation or other entity (including  partnerships and other business
         associations)  that is not a  Subsidiary  of such person or entity,  in
         which such person or one or more of its  Subsidiaries  owns directly or
         indirectly an equity  interest,  other than equity  interests  held for
         passive investment purposes which are less than 5% of each class of the
         outstanding  voting  securities or equity interests of any such entity;
         and

                      (iv) "WPL Joint  Venture"  shall mean any Joint Venture of
         WPL or any WPL Subsidiary.

                  Section 4.3  Capitalization.

                  (a)  The   authorized   capital   stock  of  WPL  consists  of
100,000,000  shares of WPL Common Stock of which  30,773,588  shares were issued
and outstanding as of September 30, 1995;

                  (b) The authorized  capital stock of Wisconsin Power and Light
Company ("WP&LC"), a Wisconsin corporation and a Subsidiary of WPL, consists of

                           (A) 18,000,000  shares of Common Stock, $5 par value,
                  of which  13,236,601  shares were issued and outstanding as of
                  September 30, 1995 (the "WP&LC Common Stock"), and

                           (B)  3,750,000  shares  of  Preferred  Stock  without
                  mandatory  redemption,  (4.50%  series,  4.80%  series,  4.96%
                  series,  4.40% series,  4.76%  series,  6.50% series and 6.20%
                  series) of which  1,049,225 were issued and  outstanding as of
                  September  30, 1995 (the  classes set forth in this clause (B)
                  being  referred  to  collectively  as,  the  "WP&LC  Preferred
                  Stock").

                  (c) All of the  issued  and  outstanding  shares of WPL Common
Stock,  WP&LC Common Stock and WP&LC  Preferred Stock are, and any shares of WPL
Common Stock issued  pursuant to the Merger and the  WPL/Interstate  and WPL/IES
Stock Option Agreements will

                                      -10-

<PAGE>



be duly  authorized,  validly  issued,  fully  paid,  nonassessable  (except  as
otherwise provided in Section 180.0622(2)(b) of the WBCL) and free of preemptive
rights.

                  (d) Except as set forth in Section  4.3 of the WPL  Disclosure
Schedule,  as of  the  date  hereof,  there  are no  outstanding  subscriptions,
options,  calls,  contracts,   voting  trusts,  proxies  or  other  commitments,
understandings,  restrictions,  arrangements,  rights or warrants, including any
right of conversion or exchange under any  outstanding  security,  instrument or
other agreement, obligating WPL or any of the WPL Subsidiaries to issue, deliver
or sell,  or cause to be issued,  delivered  or sold,  additional  shares of the
capital stock of WPL, or obligating WPL to grant, extend or enter into any such
agreement or commitment,  other than under the WPL/IES and WPL/Interstate  Stock
Option Agreements.

                  Section 4.4 Authority; Non-contravention; Statutory Approvals;
Compliance.

                  (a)  Authority.

                      (i) WPL has all requisite corporate power and authority to
         enter into this  Agreement  and the  WPL/IES and  WPL/Interstate  Stock
         Option  Agreements,  and,  subject to the applicable WPL  Shareholders'
         Approval  (as  hereinafter  defined)  and the  applicable  WPL Required
         Statutory  Approvals  (as  hereinafter   defined),  to  consummate  the
         transactions contemplated hereby or thereby. The execution and delivery
         of this  Agreement  and the WPL/IES  and  WPL/Interstate  Stock  Option
         Agreements and the consummation by WPL of the transactions contemplated
         hereby and thereby have been duly authorized by all necessary corporate
         action on the part of WPL,  subject to  obtaining  the  applicable  WPL
         Shareholders'  Approval.  Each of this  Agreement  and the  WPL/IES and
         WPL/Interstate  Stock  Option  Agreements  has been  duly  and  validly
         executed  and  delivered by WPL and,  assuming  the due  authorization,
         execution  and  delivery  hereof and  thereof by the other  signatories
         hereto and thereto, constitutes the valid and binding obligation of WPL
         enforceable  against it in accordance with its terms,  except as may be
         limited by applicable bankruptcy,  insolvency,  reorganization or other
         similar laws affecting the enforcement of creditors'  rights generally,
         and except  that the  availability  of  equitable  remedies,  including
         specific  performance,  may be subject to the  discretion  of any court
         before which any proceeding therefor may be brought.

                      (ii) AMW has all  requisite  power and  authority to enter
         into this  Agreement and to consummate  the  transactions  contemplated
         hereby. This Agreement has been duly and validly executed and delivered
         by AMW and,  assuming  the due  authorization,  execution  and delivery
         hereof  by the  other  signatories  hereto,  constitutes  the valid and
         binding

                                      -11-

<PAGE>



         obligation of AMW enforceable  against it in accordance with its terms,
         except  as  may  be  limited  by  applicable  bankruptcy,   insolvency,
         reorganization,  or other  similar laws  affecting the  enforcement  of
         creditors'  rights  generally,  and  except  that the  availability  of
         equitable remedies,  including specific performance,  may be subject to
         the discretion of any court before which any proceeding may be brought.

                  (b)  Non-contravention.  Except as set forth in Section 4.4(b)
of the WPL Disclosure Schedule, the execution and delivery of this Agreement and
the WPL/IES and the  WPL/Interstate  Stock Option  Agreements by WPL do not, and
the  consummation of the  transactions  contemplated  hereby or thereby will not
violate, conflict with, or result in a breach of any provision of, or constitute
a default (with or without notice or lapse of time or both) under,  or result in
the termination or modification  of, or accelerate the performance  required by,
or  result  in a right of  termination,  cancellation,  or  acceleration  of any
obligation  or the loss of a benefit  under,  or result in the  creation  of any
lien,  security  interest,  charge or encumbrance  upon any of the properties or
assets of WPL or any of the WPL  Subsidiaries  or WPL Joint  Ventures  (any such
violation, conflict, breach, default, termination,  modification,  cancellation,
acceleration,  loss or creation,  a  "Violation"  with respect to WPL, such term
when used in Articles V and VI having a correlative  meaning with respect to IES
and Interstate, respectively) pursuant to any provisions of:

                      (i) the  Articles  of  Incorporation,  By-laws  or similar
         governing  documents of WPL or any of the WPL Subsidiaries or WPL Joint
         Ventures;

                      (ii)  subject  to  obtaining  the WPL  Required  Statutory
         Approvals  and the  receipt  of the  WPL  Shareholders'  Approval,  any
         statute, law, ordinance,  rule,  regulation,  judgment,  decree, order,
         injunction,  writ, permit or license of any Governmental  Authority (as
         hereinafter  defined)  applicable to WPL or any of the WPL Subsidiaries
         or WPL Joint Ventures or any of their respective  properties or assets;
         or

                      (iii)  subject to obtaining the  third-party  consents set
         forth in  Section  4.4(b)  of the WPL  Disclosure  Schedule  (the  "WPL
         Required Consents") any note, bond, mortgage, indenture, deed of trust,
         license,  franchise,  permit,  concession,  contract,  lease  or  other
         instrument,  obligation or agreement of any kind to which WPL or any of
         the WPL Subsidiaries or WPL Joint Ventures is a party or by which it or
         any of its properties or assets may be bound or affected,

excluding from the foregoing  clauses (ii) and (iii) such  violations  which, in
the aggregate do not, and insofar as reasonably can be foreseen, would not, have
a WPL Material Adverse Effect.

                                      -12-

<PAGE>




                  (c)   Statutory   Approvals.   No   declaration,   filing   or
registration  with, or notice to or  authorization,  consent or approval of, any
court,  Federal,  state,  local  or  foreign  governmental  or  regulatory  body
(including a stock exchange or other self-regulatory body) or authority (each, a
"Governmental  Authority")  is necessary  for the execution and delivery of this
Agreement or the WPL/IES and  WPL/Interstate  Stock Option  Agreements by WPL or
the  consummation  by WPL of the  transactions  contemplated  hereby or thereby,
except as described in Section 4.4(c) of the WPL  Disclosure  Schedule (the "WPL
Required  Statutory  Approvals,"  it being  understood  that  references in this
Agreement to "obtaining" such WPL Required Statutory Approvals shall mean making
such declarations, filings or registrations; giving such notices; obtaining such
authorizations, consents or approvals; and having such waiting periods expire as
are necessary to avoid a violation of law).

                  (d)  Compliance.

                      (i)  (A)  Except as set forth in Section  4.4(d),  Section
         4.10 or Section 4.11 of the WPL Disclosure Schedule, or as disclosed in
         the WPL SEC Reports (as  hereinafter  defined)  filed prior to the date
         hereof,  neither  WPL  nor  any of the  WPL  Subsidiaries  nor,  to the
         knowledge of WPL, any WPL Joint  Venture,  is in violation of, is under
         investigation  with  respect  to any  violation  of, or has been  given
         notice or been charged with any violation of, any law, statute,  order,
         rule, regulation, ordinance or judgment (including, without limitation,
         any  applicable  environmental  law,  ordinance or  regulation)  of any
         Governmental  Authority,  except for violations which, in the aggregate
         do not, and insofar as  reasonably  can be foreseen,  would not, have a
         WPL Material Adverse Effect.

                           (B) For purposes of this Agreement  "knowledge" shall
         mean, with respect to any party hereto,  the actual knowledge after due
         inquiry of  principal  executive  officers of WPL,  IES or  Interstate,
         respectively set forth in Sections 4.4(d), 5.4(d) and 6.4(d) of the WPL
         Disclosure  Schedule,  IES Disclosure Schedule (as hereinafter defined)
         and Interstate Disclosure Schedule (as hereinafter defined).

                      (ii)  Except as set forth in Section  4.4(d) or in Section
         4.11 of the WPL Disclosure  Schedule,  WPL and the WPL Subsidiaries and
         the WPL Joint Ventures have all permits, licenses, franchises and other
         governmental authorizations,  consents and approvals (collectively, the
         "Permits")   necessary  to  conduct   their   businesses  as  presently
         conducted,  except  those  the  failure  of  which  to  obtain,  in the
         aggregate do not, and insofar as reasonably can be foreseen, would not,
         have a WPL Material Adverse Effect.


                                      -13-

<PAGE>



                      (iii)  Except  as set forth in  Section  4.4(d) of the WPL
         Disclosure Schedule, each of WPL and the WPL Subsidiaries and WPL Joint
         Ventures is not in breach,  violation or default in the  performance or
         observance  of any term or  provision  of,  and no event  has  occurred
         which, with lapse of time or action by a third party, could result in a
         default under,

                           (A) its Articles of Incorporation or By-laws, or

                           (B) any contract, commitment,  agreement,  indenture,
         mortgage, loan agreement, note, lease, bond, license, approval or other
         instrument  to  which it is a party or by which it is bound or to which
         any of its  property is subject,  except for  breaches,  violations  or
         defaults  which, in the aggregate do not, and insofar as reasonably can
         be foreseen, would not, have a WPL Material Adverse Effect.

                  Section 4.5  Reports and Financial Statements.

                  (a)  The  filings  required  to be  made  by WPL  and  the WPL
Subsidiaries  since January 1, 1992 under the Securities Act of 1933, as amended
(the  "Securities  Act"),  the Securities  Exchange Act of 1934, as amended (the
"Exchange  Act"),  the 1935 Act, the Federal  Power Act (the "Power  Act"),  the
Atomic Energy Act of 1954, as amended (the "Atomic  Energy Act") and  applicable
state laws and  regulations  have been filed with the SEC,  the  Federal  Energy
Regulatory  Commission  (the "FERC"),  the Nuclear  Regulatory  Commission  (the
"NRC"),  the  Department of Energy (the "DOE") or any  appropriate  state public
utilities  commission,  as the case may be,  including  all  forms,  statements,
reports,  agreements (oral or written) and all documents,  exhibits,  amendments
and  supplements  appertaining  thereto,  and complied,  as of their  respective
dates,  in  all  material  respects  with  all  applicable  requirements  of the
appropriate statute and the rules and regulations thereunder.

                  (b) WPL has made  available  to IES and  Interstate a true and
complete  copy  of each  form,  report,  schedule,  registration  statement  and
definitive  proxy  statement  filed by each of WPL and WP&LC  with the SEC since
January  1, 1992 (as such  documents  have since the time of their  filing  been
amended or supplemented,  the "WPL SEC Reports") and each other filing described
in Section 4.5(a).  As of their  respective  dates,  the WPL SEC Reports did not
contain any untrue statement of a material fact or omit to state a material fact
required to be stated  therein or necessary to make the statements  therein,  in
light of the circumstances under which they were made, not misleading.

                  (c)  The  audited   consolidated   financial   statements  and
unaudited  interim  financial  statements of WPL and WP&LC,  as the case may be,
included in the WPL SEC Reports (collectively, the

                                      -14-

<PAGE>



"WPL Financial  Statements")  have been prepared in accordance with GAAP (except
as may be indicated  therein or in the notes  thereto and except with respect to
unaudited  statements  as  permitted  by Form 10-Q under the  Exchange  Act) and
fairly present in all material respects the financial  position of WPL or WP&LC,
as the case may be, as of the dates  thereof and the  results of its  operations
and cash flows for the periods then ended, subject, in the case of the unaudited
interim financial statements, to normal, recurring audit adjustments.

                  (d)  True,  accurate  and  complete  copies  of  the  Restated
Articles of  Incorporation  and By-laws of WPL, as in effect on the date hereof,
are included (or incorporated by reference) in the WPL SEC Reports.

                  Section  4.6 Absence of Certain  Changes or Events.  Except as
disclosed in the WPL SEC Reports  filed prior to the date hereof or as set forth
in Section 4.6 of the WPL Disclosure Schedule,  since December 31, 1994, WPL and
each of the WPL  Subsidiaries  and the WPL Joint Ventures have  conducted  their
businesses only in the ordinary course of their respective businesses consistent
with past  practice  and there has not been,  and no facts or  conditions  exist
(other than facts or conditions  of general  applicability  to electric  utility
companies in the region in which WPL, IES and Interstate  operate) which, in the
aggregate  have,  or insofar as  reasonably  can be foreseen,  would have, a WPL
Material Adverse Effect.

                  Section 4.7  Litigation.  Except as  disclosed  in the WPL SEC
Reports  filed prior to the date hereof or as set forth in Section 4.7,  Section
4.9 or Section 4.11 of the WPL Disclosure Schedule,

                  (a) there are no claims, suits, actions or proceedings pending
         or,  to the  knowledge  of  WPL,  threatened,  nor  are  there,  to the
         knowledge of WPL, any  investigations  or reviews pending or threatened
         against,  relating to or affecting  WPL or any of the WPL  Subsidiaries
         and, to the knowledge of WPL, the WPL Joint Ventures;

                  (b) there have not been any  developments  since  December 31,
         1994  with  respect  to  such   disclosed   claims,   suits,   actions,
         proceedings, investigations or reviews; and

                  (c) there are no  judgments,  decrees,  injunctions,  rules or
         orders  of any  court,  governmental  department,  commission,  agency,
         instrumentality or authority or any arbitrator applicable to WPL or any
         of the WPL  Subsidiaries  and, to the  knowledge  of WPL, the WPL Joint
         Ventures,

which, when taken together with any other nondisclosures of matters described in
clauses (a), (b) and (c), have, or insofar as reasonably can be foreseen,  would
have, a WPL Material Adverse Effect.

                                      -15-

<PAGE>




                  Section 4.8  Registration Statement and Proxy Statement.

                  (a) None of the  information  supplied or to be supplied by or
on behalf of WPL for inclusion or incorporation by reference in:

                      (i) the  registration  statement  on Form  S-4 to be filed
         with the SEC by WPL in  connection  with the  issuance of shares of WPL
         Common Stock in the Merger (the "Registration  Statement") will, at the
         time the  Registration  Statement is filed with the SEC and at the time
         it becomes  effective  under the  Securities  Act,  contain  any untrue
         statement  of a  material  fact or  omit to  state  any  material  fact
         required  to be stated  therein  or  necessary  to make the  statements
         therein not misleading; and

                      (ii)  the  joint  proxy  statement,  in  definitive  form,
         relating to the meetings of WPL, IES and Interstate  shareholders to be
         held in connection with the Merger (the "Proxy Statement") will, at the
         date(s)  mailed to  shareholders  and at the times of the  meetings  of
         shareholders  to be held in  connection  with the  Merger,  contain any
         untrue  statement of a material fact or omit to state any material fact
         required  to be  stated  therein  or  necessary  in  order  to make the
         statements  therein, in light of the circumstances under which they are
         made, not misleading.

                  (b) The  Registration  Statement and the Proxy  Statement will
comply as to form in all material respects with the provisions of the Securities
Act and the Exchange Act, respectively, and the applicable rules and regulations
thereunder.

                  Section 4.9 Tax Matters. Except as set forth in Section 4.9 of
the WPL Disclosure Schedule:

                  (a)  Filing of  Timely  Tax  Returns.  WPL and each of the WPL
Subsidiaries  have filed (or there has been filed on its behalf) all Tax Returns
(as hereinafter  defined)  required to be filed by each of them under applicable
law. All such Tax Returns were and are in all material  respects true,  complete
and correct and filed on a timely basis.

                  (b)  Payment  of Taxes.  WPL and each of the WPL  Subsidiaries
have,  within the time and in the manner  prescribed  by law, paid all Taxes (as
hereinafter  defined)  that are  currently  due and  payable  except  for  those
contested in good faith and for which adequate reserves have been taken.

                  (c)  Tax  Reserves.   WPL  and  the  WPL   Subsidiaries   have
established on their books and records reserves adequate to pay

                                      -16-

<PAGE>



all Taxes and reserves for deferred income taxes in accordance with GAAP.

                  (d) Tax  Liens.  There are no Tax liens upon the assets of WPL
or any of the WPL Subsidiaries except liens for Taxes not yet due.

                  (e) Withholding  Taxes.  WPL and each of the WPL  Subsidiaries
have complied in all material  respects with the provisions of the Code relating
to the withholding of Taxes, as well as similar provisions under any other laws,
and have,  within the time and in the manner  prescribed  by law,  withheld from
employee wages and paid over to the proper governmental  authorities all amounts
required.

                  (f) Extensions of Time for Filing Tax Returns. Neither WPL nor
any of the WPL  Subsidiaries has requested any extension of time within which to
file any Tax Return, which Tax Return has not since been timely filed.

                  (g) Waivers of Statute of Limitations.  Neither WPL nor any of
the WPL Subsidiaries has executed any outstanding waivers or comparable consents
regarding  the  application  of the statute of  limitations  with respect to any
Taxes or Tax Returns.

                  (h)  Expiration  of Statute  of  Limitations.  The  statute of
limitations  for the  assessment of all Taxes has expired for all applicable Tax
Returns of WPL and each of the WPL  Subsidiaries  or those Tax Returns have been
examined by the appropriate  taxing authorities for all Tax periods ended before
the date hereof, and no deficiency for any Taxes has been proposed,  asserted or
assessed against WPL or any of the WPL  Subsidiaries  that has not been resolved
and paid in full.

                  (i) Audit, Administrative and Court Proceedings.  No audits or
other administrative proceedings or court proceedings are presently pending with
regard to any Taxes or Tax Returns of WPL or any of the WPL Subsidiaries.

                  (j) Powers of  Attorney.  No power of  attorney  currently  in
force has been granted by WPL or any of the WPL Subsidiaries  concerning any Tax
matter.

                  (k) Tax Rulings.  Neither WPL nor any of the WPL  Subsidiaries
has  received a Tax Ruling (as  hereinafter  defined) or entered  into a Closing
Agreement (as hereinafter  defined) with any taxing  authority that would have a
continuing adverse effect after the Closing Date.

                  (l) Availability of Tax Returns. WPL has made available to IES
and  Interstate  complete  and  accurate  copies  covering  the six years  ended
December 31, 1994 of (i) all Tax Returns,  and any amendments thereto,  filed by
WPL or any of the WPL  Subsidiaries,  (ii) all audit  reports  received from any
taxing

                                      -17-

<PAGE>



authority  relating  to  any  Tax  Return  filed  by  WPL  or  any  of  the  WPL
Subsidiaries, and (iii) any Closing Agreements entered into by WPL or any of the
WPL Subsidiaries with any taxing authority.

                  (m) Tax Sharing Agreements. Neither WPL nor any WPL Subsidiary
is a party to any agreement relating to allocating or sharing of Taxes.

                  (n)  Code  Section  280G.  Neither  WPL  nor  any of  the  WPL
Subsidiaries is a party to any agreement,  contract,  or arrangement  that could
result, on account of the transactions contemplated hereunder,  separately or in
the  aggregate,  in the payment of any "excess  parachute  payments"  within the
meaning of Section 280G of the Code.

                  (o)  Liability  for  Others.  None  of WPL  or any of the  WPL
Subsidiaries  has any  liability  for Taxes of any person other than WPL and the
WPL Subsidiaries (i) under Treasury Regulations Section 1.1502-6 (or any similar
provision of state, local or foreign law) as a transferee or successor,  (ii) by
contract, or (iii) otherwise.

                  (p) As used in this Agreement:

                      (i) "Taxes"  means any Federal,  state,  county,  local or
         foreign taxes, charges,  fees, levies, or other assessments,  including
         all net income,  gross  income,  sales and use,  ad valorem,  transfer,
         gains, profits,  excise,  franchise,  real and personal property, gross
         receipts,   capital  stock,   production,   business  and   occupation,
         disability,  employment,  payroll,  license,  estimated,  stamp, custom
         duties,  severance  or  withholding  taxes or  charges  imposed  by any
         governmental  entity, and includes any interest and penalties (civil or
         criminal) on or additions to any such taxes;

                      (ii)  "Tax  Return"  means  a  report,   return  or  other
         information  required  to be  supplied  to a  governmental  entity with
         respect to Taxes  including,  where permitted or required,  combined or
         consolidated returns for a group of entities;

                      (iii)  "Tax  Ruling"  means a  written  ruling of a taxing
         authority relating to Taxes; and

                      (iv)  "Closing  Agreement"  means a  written  and  legally
         binding agreement with a taxing authority relating to Taxes.

                  Section 4.10 Employee Matters; ERISA.

                  (a)  Benefit  Plans.  Section  4.10(a)  of the WPL  Disclosure
Schedule  contains  a true and  complete  list of each  employee  benefit  plan,
program or arrangement covering employees,

                                      -18-

<PAGE>



former  employees or directors of WPL and each of the WPL  Subsidiaries or their
beneficiaries,  or  providing  benefits  to such  persons in respect of services
provided to any such entity,  including,  but not limited to,  employee  benefit
plans  within the  meaning of Section  3(3) of the  Employee  Retirement  Income
Security  Act of 1974,  as amended  ("ERISA"),  and any  severance  or change in
control agreement  (collectively,  the "WPL Benefit Plans"). For the purposes of
this  Section  4.10  only,  the  term  "WPL"  shall be  deemed  to  include  the
predecessors of such company.

                  (b)  Contributions.  Except as set forth in Section 4.10(b) of
the WPL  Disclosure  Schedule,  all material  contributions  and other  payments
required  to be made by WPL or any of the WPL  Subsidiaries  to any WPL  Benefit
Plan (or to any  person  pursuant  to the terms  thereof)  have been made or the
amount of such payment or contribution  obligation has been reflected in the WPL
Financial Statements.

                  (c) Qualification;  Compliance. Except as set forth in Section
4.10(c) of the WPL Disclosure Schedule each of the WPL Benefit Plans intended to
be  "qualified"  within  the  meaning  of  Section  401(a)  of the Code has been
determined by the Internal Revenue Service (the "IRS") to be so qualified,  and,
to the knowledge of WPL, no circumstances  exist that are reasonably expected by
WPL to result in the revocation of any such determination.  WPL is in compliance
in all respects with, and each of the WPL Benefit Plans is and has been operated
in all respects in compliance  with, all applicable  laws, rules and regulations
governing each such plan,  including,  without  limitation,  ERISA and the Code,
except  for any  violations  that,  in the  aggregate  do not,  and  insofar  as
reasonably  can be  foreseen,  would not,  give rise to a WPL  Material  Adverse
Effect.  Each WPL Benefit  Plan  intended to provide for the deferral of income,
the  reduction  of salary or other  compensation,  or to afford other income tax
benefits,  complies  in all  material  respects  with  the  requirements  of the
applicable  provisions of the Code or other laws, rules and regulations required
to provide such income tax benefits.

                  (d)  Liabilities.  With  respect  to the  WPL  Benefit  Plans,
individually and in the aggregate,  no event has occurred, and, to the knowledge
of WPL,  there does not now exist any  condition  or set of  circumstances  that
could subject WPL or any of the WPL Subsidiaries to any liability  arising under
the Code, ERISA or any other applicable law (including,  without limitation, any
liability  of any kind  whatsoever,  whether  direct  or  indirect,  contingent,
inchoate  or  otherwise,  to any  such  plan  or the  Pension  Benefit  Guaranty
Corporation  (the  "PBGC")),  or under any  indemnity  agreement to which WPL is
subject, which liability,  excluding liability for PBGC premiums, benefit claims
and  funding  obligations  payable in the  ordinary  course,  has, or insofar as
reasonably can be foreseen, would have, a WPL Material Adverse Effect.

                                      -19-

<PAGE>




                  (e) Welfare Plans.  Except as set forth in Section  4.10(e) of
the WPL  Disclosure  Schedule,  none of the WPL Benefit  Plans that are "welfare
plans"  within the meaning of Section  3(1) of ERISA,  provides for any benefits
payable  to or on  behalf of any  employee  or  director  after  termination  of
employment  or service,  as the case may be,  other than  elective  continuation
coverage  required to be provided  under  Section 4980B of the Code or Part 6 of
Title I of ERISA or  coverage  which  expires at the end of the  calendar  month
following such event.

                  (f) Documents  made  Available.  WPL has made available to IES
and Interstate a true and correct copy of each collective  bargaining  agreement
to which WPL or any of the WPL Subsidiaries is a party or under which WPL or any
of the WPL  Subsidiaries  has obligations  and, with respect to each WPL Benefit
Plan, where applicable,

                      (i) such plan and summary plan description,

                      (ii) the most recent annual report filed with the IRS,

                      (iii) each related trust  agreement,  insurance  contract,
         service  provider or investment  management  agreement  (including  all
         amendments to each such document),

                      (iv) the most recent determination of the IRS with respect
         to the qualified status of such WPL Benefit Plan, and

                      (v) the most recent actuarial report or valuation.

                  (g) Payments  Resulting  from  Merger.  Except as set forth in
Section 4.10(g) of the WPL Disclosure Schedule:

                      (i) The  consummation  or  announcement of any transaction
         contemplated  by this  Agreement  will  not  (either  alone or upon the
         occurrence of any additional or further acts or events) result in any

                           (A) payment  (whether of severance  pay or otherwise)
                  becoming  due from WPL or any of the WPL  Subsidiaries  to any
                  officer,  employee,  former employee or director thereof or to
                  the  trustee  under any "rabbi  trust" or similar  arrangement
                  that  would  not  have  been  paid  without   regard  to  such
                  consummation or announcement, or

                           (B)  benefit   under  any  WPL  Benefit   Plan  being
                  established or becoming accelerated, vested or payable; and

                      (ii)  neither  WPL nor any of the  WPL  Subsidiaries  is a
         party to

                                      -20-

<PAGE>




                           (A)    any    management,     employment,    deferred
                  compensation,  severance  (including  any  payment,  right  or
                  benefit  resulting  from a change in control),  bonus or other
                  contract for personal  services with any officer,  director or
                  employee,

                           (B) any consulting contract with any person who prior
                  to entering  into such  contract  was a director or officer of
                  WPL, or

                           (C) any  material  plan,  agreement,  arrangement  or
                  understanding similar to any of the foregoing.

                  (h) Labor  Agreements.  Except as set forth in Section 4.10(h)
of the WPL Disclosure  Schedule,  as of the date hereof,  neither WPL nor any of
the WPL Subsidiaries is a party to any collective  bargaining agreement or other
labor agreement with any union or labor  organization.  To the knowledge of WPL,
as of the  date  hereof,  there  is no  current  union  representation  question
involving employees of WPL or any of the WPL Subsidiaries,  nor does WPL know of
any activity or proceeding of any labor organization (or representative thereof)
or employee group to organize any such employees. Except as disclosed in the WPL
SEC  Reports  filed  prior to the date  hereof or in Section  4.10(h) of the WPL
Disclosure Schedule,

                      (i) there is no material unfair labor practice, employment
         discrimination  or  other  complaint  against  WPL or  any  of the  WPL
         Subsidiaries pending, or to the knowledge of WPL, threatened,

                      (ii) there is no  strike,  lockout  or  material  dispute,
         slowdown  or  work  stoppage  pending,  or to  the  knowledge  of  WPL,
         threatened,  against or involving  WPL or any of the WPL  Subsidiaries,
         and

                      (iii) there is no material proceeding, claim, suit, action
         or  governmental  investigation  pending or, to the  knowledge  of WPL,
         threatened,  in respect of which any  director,  officer,  employee  or
         agent of WPL or any of the WPL  Subsidiaries  is or may be  entitled to
         claim indemnification from WPL or such WPL Subsidiary pursuant to their
         respective Articles of Incorporation or By-laws.

                  Section 4.11 Environmental Protection.  Except as set forth in
Section  4.11 of the WPL  Disclosure  Schedule or in the WPL SEC  Reports  filed
prior to the date hereof:

                  (a)  Compliance.

                      (i)  Each of WPL and the WPL  Subsidiaries  and WPL  Joint
         Ventures is in compliance  with all applicable  Environmental  Laws (as
         hereinafter defined),  except where the failure to be in compliance, in
         the aggregate does not,

                                      -21-

<PAGE>



         and  insofar as  reasonably  can be  foreseen,  would  not,  have a WPL
         Material Adverse Effect; and

                      (ii) neither WPL nor any of the WPL  Subsidiaries  and WPL
         Joint  Ventures has received any  communication  (written or oral) from
         any person or  Governmental  Authority  that alleges that WPL or any of
         the WPL  Subsidiaries  and WPL Joint Ventures is not in such compliance
         with applicable Environmental Laws.

                  (b)   Environmental   Permits.   Each   of  WPL  and  the  WPL
Subsidiaries has obtained all material environmental,  health and safety permits
and governmental  authorizations  (collectively,  the  "Environmental  Permits")
necessary  for the  construction  of their  facilities  and the conduct of their
operations,  as  applicable,  and all  such  Environmental  Permits  are in good
standing or, where applicable,  a renewal  application has been timely filed and
is pending agency  approval,  and WPL and the WPL Subsidiaries are in compliance
with all terms and  conditions of the  Environmental  Permits,  except where the
failure to be in such  compliance,  in the  aggregate  does not,  and insofar as
reasonably can be foreseen, would not, have a WPL Material Adverse Effect.

                  (c) Environmental  Claims. There is no material  Environmental
Claim (as hereinafter defined) pending

                      (i)  against  WPL or any of the  WPL  Subsidiaries  or WPL
         Joint Ventures,

                      (ii) against any person or entity whose  liability for any
         Environmental  Claim WPL or any of the WPL Subsidiaries has or may have
         retained or assumed either contractually or by operation of law, or

                      (iii) against any real or personal  property or operations
         which WPL or any of the WPL Subsidiaries  owns,  leases or manages,  in
         whole or in part.

                  (d) Releases. To the knowledge of WPL, there have not been any
material  Releases  (as  hereinafter  defined)  of any  Hazardous  Material  (as
hereinafter  defined) that would be  reasonably  likely to form the basis of any
material  Environmental  Claim  against WPL or any of the WPL  Subsidiaries,  or
against any person or entity  whose  liability  for any  material  Environmental
Claim WPL or any of the WPL  Subsidiaries  has or may have  retained  or assumed
either contractually or by operation of law.

                  (e) Predecessors. To the knowledge of WPL, with respect to any
predecessor  of  WPL  or  any of the  WPL  Subsidiaries,  there  is no  material
Environmental  Claim  pending  or  threatened,  and there has been no Release of
Hazardous  Materials  that would be  reasonably  likely to form the basis of any
material Environmental Claim.


                                      -22-

<PAGE>



                  (f) Disclosure.  To WPL's knowledge, WPL has disclosed to each
of IES and Interstate all material facts which WPL reasonably  believes form the
basis of a material Environmental Claim arising from

                      (i) the cost of WPL pollution control equipment  currently
         required or known to be required in the future;

                      (ii)  current  WPL  remediation  costs or WPL  remediation
         costs known to be required in the future; or

                      (iii) any other environmental  matter affecting WPL or the
         WPL Subsidiaries or WPL Joint Ventures.

                  (g) As used in this Agreement:

                      (i)    "Environmental    Claim"    means   any   and   all
         administrative,  regulatory or judicial actions, suits, demands, demand
         letters,  directives,  claims,  liens,  investigations,  proceedings or
         notices of noncompliance,  liability or violation  (written or oral) by
         any person or entity  (including any Governmental  Authority)  alleging
         potential   liability   (including,   without   limitation,   potential
         responsibility  or  liability  for  enforcement,  investigatory  costs,
         cleanup costs,  governmental  response costs,  removal costs,  remedial
         costs, natural resources damages,  property damages,  personal injuries
         or penalties) arising out of, based on or resulting from

                           (A) the presence,  or Release or  threatened  Release
                  into  the  environment,  of  any  Hazardous  Materials  at any
                  location, whether or not owned, operated, leased or managed by
                  WPL or any of the WPL  Subsidiaries or WPL Joint Ventures (for
                  purposes of this  Section  4.11),  or by IES or any of the IES
                  Subsidiaries  or IES Joint Ventures (as  hereinafter  defined)
                  (for  purposes of Section 5.11) or by Interstate or any of the
                  Interstate  Subsidiaries  or  Interstate  Joint  Ventures  (as
                  hereinafter defined) (for the purposes of Section 6.11); or

                           (B) circumstances forming the basis of any violation,
                  or alleged violation, of any Environmental Law; or

                           (C) any and all  claims  by any third  party  seeking
                  damages,   contribution,   indemnification,   cost   recovery,
                  compensation or injunctive  relief resulting from the presence
                  or Release of any Hazardous Materials;

                      (ii)  "Environmental  Laws" means all  Federal,  state and
         local  laws,   rules  and  regulations   relating  to  pollution,   the
         environment (including, without limitation, ambient air,

                                      -23-

<PAGE>



         surface  water,  groundwater,  land  surface or  subsurface  strata) or
         protection of human health as it relates to the environment  including,
         without  limitation,  laws and  regulations  relating  to  Releases  or
         threatened  Releases of Hazardous  Materials,  or otherwise relating to
         the manufacture,  processing,  distribution,  use, treatment,  storage,
         disposal, transport or handling of Hazardous Materials;

                      (iii)  "Hazardous  Materials"  means (a) any  petroleum or
         petroleum products, radioactive materials, asbestos in any form that is
         or  could  become  friable,  urea  formaldehyde  foam  insulation,  and
         transformers   or  other  equipment  that  contain   dielectric   fluid
         containing polychlorinated biphenyls; and (b) any chemicals,  materials
         or substances which are now defined as or included in the definition of
         "hazardous  substances,"  "hazardous  wastes,"  "hazardous  materials,"
         "extremely  hazardous  wastes,"  "restricted  hazardous wastes," "toxic
         substances," "toxic pollutants," or words of similar import,  under any
         Environmental Law; and (c) any other chemical,  material,  substance or
         waste, exposure to which is now prohibited,  limited or regulated under
         any  Environmental Law in a jurisdiction in which WPL or any of the WPL
         Subsidiaries  or WPL Joint  Ventures  operates  (for  purposes  of this
         Section  4.11) or in which  IES or any of the IES  Subsidiaries  or IES
         Joint  Ventures  operates  (for  purposes of Section  5.11) or in which
         Interstate or any of the Interstate  Subsidiaries  or Interstate  Joint
         Ventures operates (for purposes of Section 6.11); and

                      (iv)  "Release"  means  any  release,   spill,   emission,
         leaking, injection, deposit, disposal,  discharge,  dispersal, leaching
         or migration into the atmosphere,  soil, surface water,  groundwater or
         property.

                  Section 4.12  Regulation as a Utility.  (a) WP&LC is regulated
as a public  utility in the State of Wisconsin  and in no other  state.  WP&LC's
Subsidiary,   South  Beloit  Water,  Gas  and  Electric  Company,   an  Illinois
corporation,  is a public  utility  supplying  electric,  gas and water service,
principally in Winnebago County,  Illinois.  Except as set forth in Section 4.12
of the WPL  Disclosure  Schedule,  neither WPL nor any  "subsidiary  company" or
"affiliate"  of WPL is  subject  to  regulation  as a public  utility  or public
service company (or similar designation) by any other state in the United States
or any foreign  country.  WPL is an exempt holding company under Section 3(a)(1)
of the 1935 Act.

                  (b) As used in this  Section  4.12  and in  Sections  5.12 and
6.12, the terms  "subsidiary  company" and "affiliate" shall have the respective
meanings ascribed to them in the 1935 Act.


                                      -24-

<PAGE>



                  Section 4.13 Vote  Required.  The approval by the holders of a
majority of the votes  entitled  to be cast by all  holders of WPL Common  Stock
(the "WPL  Shareholders'  Approval") to approve the IES Merger,  the issuance of
the shares of WPL  Common  Stock in the Merger  and the  charter  amendments  as
described in Section 8.19 of the WPL Disclosure Schedule is the only vote of the
holders of any class or series of the capital  stock of WPL  required for any of
the transactions  contemplated by this Agreement or the Stock Option  Agreements
to which WPL is a party; provided, however, that the approval of shareholders of
WPL may be required for the repurchase of shares of WPL Common Stock pursuant to
Section 8(a) of each of the WPL/IES and  WPL/Interstate  Stock Option Agreements
under circumstances where Section 180.1134 of the WBCL would be applicable.

                  Section 4.14  Accounting Matters.

                  (a) Neither WPL nor, to WPL's knowledge, any of its Affiliates
(as  hereinafter  defined)  has taken or agreed to take any  action  that  would
prevent WPL from accounting for the transactions to be effected pursuant to this
Agreement as a pooling of interests in accordance  with GAAP and  applicable SEC
regulations.

                  (b)  As  used  in  this  Agreement   (except  as  specifically
otherwise defined):

                      (i) "Affiliate"  means, as to any person, any other person
         which directly or indirectly controls, or is under common control with,
         or is controlled by, such person; and

                      (ii) "control" (including,  with its correlative meanings,
         "controlled  by" and "under  common  control  with") means  possession,
         directly or  indirectly,  of power to direct or cause the  direction of
         management  or policies  (whether  through  ownership of  securities or
         partnership or other ownership interests, by contract or otherwise).

                  Section 4.15  Applicability of Certain Provisions of Wisconsin
Law, Etc. Assuming the representations and warranties of IES and Interstate made
in Sections 5.18 and 6.18, respectively, are correct, none of the "control share
voting"  provisions of Section 180.1150 of the WBCL, the "business  combination"
provisions  of  Sections  180.1140 to  180.1144  of the WBCL,  the "fair  price"
provisions of Sections  180.1130 to 180.1133 of the WBCL, or any other  takeover
related  provisions  of the WBCL (or, to the knowledge of WPL, any other similar
state statute) or the Restated  Articles of Incorporation or By-laws of WPL, are
applicable to the  transactions  contemplated by this  Agreement,  including the
granting or exercise of the WPL/IES and  WPL/Interstate  Stock Option Agreements
(except as set forth in Section 4.15 of the WPL Disclosure Schedule).


                                      -25-

<PAGE>



                  Section  4.16  Opinion of  Financial  Advisor.  As of the date
hereof, WPL has received the opinion of Merrill Lynch & Co. ("Merrill"),  to the
effect that, as of the date hereof,  the IES Ratio and the Interstate  Ratio are
fair to WPL from a financial point of view.

                  Section 4.17 Insurance. Except as set forth in Section 4.17 of
the WPL Disclosure  Schedule,  each of WPL and the WPL  Subsidiaries is, and has
been continuously  since January 1, 1990,  insured with financially  responsible
insurers in such amounts and against  such risks and losses as are  customary in
all material respects for companies conducting the business conducted by WPL and
the WPL  Subsidiaries  during such time  period.  Except as set forth in Section
4.17 of the WPL Disclosure Schedule, neither WPL nor any of the WPL Subsidiaries
has  received  any notice of  cancellation  or  termination  with respect to any
material  insurance policy of WPL or any of the WPL Subsidiaries.  The insurance
policies  of WPL and each of the WPL  Subsidiaries  are  valid  and  enforceable
policies in all material respects.

                  Section 4.18  Ownership of IES and  Interstate  Common  Stock.
Except as set forth in Section 4.18 of the WPL Disclosure  Schedule,  and except
pursuant  to  the  terms  of  the  IES/WPL   Stock  Option   Agreement  and  the
Interstate/WPL Stock Option Agreement,  WPL does not "beneficially own" (as such
term is defined for purposes of Section 13(d) of the Exchange Act) any shares of
IES Common Stock or Interstate Common Stock.

                  Section  4.19 WPL Rights  Agreement.  Assuming the accuracy of
the representations contained in Sections 5.18 and 6.18, the consummation of the
transactions contemplated by this Agreement will not result in the triggering of
any right or entitlement of WPL shareholders under the WPL Rights Agreement.

                  Section 4.20 Operations of Nuclear Power Plant.  Except as set
forth in Section 4.20 of the WPL  Disclosure  Schedule,  the  operations  of the
Kewaunee  Nuclear  Facility  ("Kewaunee")  owned by WPL (together with Wisconsin
Public  Service  Corporation  ("WPS")  and Madison  Gas & Electric  Company,  as
tenants in common) and  operated  by WPS,  have at all times been  conducted  in
compliance  with  applicable   health,   safety,   regulatory  and  other  legal
requirements, except where the failure to be in compliance in the aggregate does
not, and insofar as can  reasonably be foreseen,  would not, have a WPL Material
Adverse  Effect.  Kewaunee  maintains  emergency plans designed to respond to an
unplanned  release from Kewaunee of radioactive  materials into the environment.
Customary liability  insurance  consistent with industry practice and consistent
with  WPL's  view of the risks  inherent  in the  operation  of a nuclear  power
facility   currently   exists   with   respect  to   Kewaunee.   Plans  for  the
decommissioning of Kewaunee and for the short-term storage of spent nuclear fuel
conform  with the  requirements  of  applicable  law, and such plans have at all
times been funded consistently with budget projections for such plans.

                                      -26-

<PAGE>





                                   ARTICLE V

                     REPRESENTATIONS AND WARRANTIES OF IES

                  IES represents and warrants to WPL and Interstate as follows:

                  Section  5.1  Organization  and  Qualification.  Except as set
forth in Section 5.1 of the Disclosure  Schedule to this Agreement  prepared and
delivered  by IES  (the  "IES  Disclosure  Schedule"),  each  of IES and the IES
Subsidiaries (as hereinafter  defined) is a corporation duly organized,  validly
existing and in good  standing (to the extent  applicable  under the laws of its
respective  jurisdiction of  incorporation  or  organization,  has all requisite
corporate  power and  authority,  and has been duly  authorized by all necessary
approvals and orders to own,  lease and operate its assets and properties to the
extent  owned,  leased and  operated  and to carry on its  business as it is now
being  conducted  and is duly  qualified  and in good  standing  (to the  extent
applicable) to do business in each  respective  jurisdiction in which the nature
of its business or the ownership or leasing of its assets and  properties  makes
such qualification necessary, other than in such jurisdictions where the failure
to be so qualified and in good standing  would not, when taken together with all
other such failures, have a material adverse effect on the business, operations,
properties,  assets,  condition  (financial  or  otherwise),  or the  results of
operations  of  IES  and  the  IES  Subsidiaries  taken  as a  whole  or on  the
consummation of the transaction  contemplated  hereby (an "IES Material  Adverse
Effect").

                  Section 5.2  Subsidiaries.

                  (a) Section 5.2 of the IES  Disclosure  Schedule  sets forth a
description  as of the  date  hereof,  of all IES  Subsidiaries  and  IES  Joint
Ventures, including (i) the name of each such entity and IES's interest therein,
and  (ii) a brief  description  of the  principal  line  or  lines  of  business
conducted by each such entity.

                  (b) Except as set forth in Section  5.2 of the IES  Disclosure
Schedule, none of the IES Subsidiaries is a "public utility company," a "holding
company," a "subsidiary company" or an "affiliate" of any public utility company
within the meaning of Section 2(a)(5),  2(a)(7), 2(a)(8) or 2(a)(11) of the 1935
Act, respectively.

                  (c) Except as set forth in Section  5.2 of the IES  Disclosure
Schedule,  all of the issued and outstanding shares of capital stock of each IES
Subsidiary are duly authorized,  validly issued,  fully paid,  nonassessable and
free of preemptive  rights, and are owned,  directly or indirectly,  by IES free
and clear of any liens, claims, encumbrances, security interests, equities,

                                      -27-

<PAGE>



charges  and  options of any  nature  whatsoever,  and there are no  outstanding
subscriptions,  options,  calls,  contracts,  voting  trusts,  proxies  or other
commitments,  understandings,  restrictions,  arrangements,  rights or warrants,
including any right of conversion or exchange  under any  outstanding  security,
instrument  or other  agreement,  obligating  any such IES  Subsidiary to issue,
deliver or sell, or cause to be issued,  delivered or sold, additional shares of
its capital stock, or granting to any person other than IES or an IES Subsidiary
any right to participate in its dividends or earnings or obligating it to grant,
extend or enter into any such agreement or commitment.

                  (d)  As used in this Agreement,

                      (i) "IES Subsidiary" shall mean any Subsidiary of IES; and

                      (ii) "IES Joint  Venture"  shall mean any Joint Venture of
         IES or any IES Subsidiary.

                  Section 5.3  Capitalization.

                  (a)  The authorized capital stock of IES consists of

                      (i)  48,000,000  shares  of  IES  Common  Stock  of  which
         29,345,573 shares were issued and outstanding as of September 30, 1995,
         and

                      (ii) 5,000,000  shares of IES Cumulative  Preferred Stock,
         no par value  ("IES  Preferred  Stock"),  of which none were  issued or
         outstanding as of September 30, 1995.

                   (b) The  authorized  capital stock of IES's  Subsidiary,  IES
Utilities Inc., an Iowa corporation ("Utilities") consists of

                      (i) 24,000,000 shares of common stock, par value $2.50 per
         share of which  13,370,788  shares  were issued and  outstanding  as of
         September 30, 1995 ("Utilities Common Stock"),

                      (ii) 466,406 shares of Cumulative Preferred Stock, $50 par
         value (4.30% series,  4.80% series,  and 6.10% series) of which 120,000
         of the 4.30% series,  146,354 of the 4.80%  series,  and 100,000 of the
         6.10%  series  were issued and  outstanding  as of  September  30, 1995
         ("Utilities Preferred Stock"), and

                      (iii) 700,000 shares of Cumulative  Preference Stock, $100
         par value, of which none were outstanding as of September 30, 1995.

                  (c) All of the  issued  and  outstanding  shares of IES Common
Stock,  Utilities Common Stock and Utilities Preferred Stock are, and any shares
of IES Common Stock issued pursuant to

                                      -28-

<PAGE>



the IES/WPL and IES/Interstate Stock Option Agreements will be, duly authorized,
validly issued, fully paid, nonassessable and free of preemptive rights.

                  (d) Except as set forth in Section  5.3 of the IES  Disclosure
Schedule,  as of  the  date  hereof,  there  are no  outstanding  subscriptions,
options,  calls,  contracts,   voting  trusts,  proxies  or  other  commitments,
understandings,  restrictions,  arrangements,  rights or warrants, including any
right of conversion or exchange under any  outstanding  security,  instrument or
other agreement, obligating IES or any of the IES Subsidiaries to issue, deliver
or sell,  or cause to be issued,  delivered  or sold,  additional  shares of the
capital stock of IES, or obligating IES to grant,  extend or enter into any such
agreement or commitment,  other than under the IES/WPL and IES/Interstate  Stock
Option Agreements.

                  Section 5.4 Authority; Non-contravention; Statutory Approvals;
Compliance.

                  (a)  Authority.  IES has all  requisite  corporate  power  and
authority to enter into this Agreement and the IES/WPL and IES/Interstate  Stock
Option Agreements, and, subject to the applicable IES Shareholders' Approval (as
hereinafter  defined) and the  applicable IES Required  Statutory  Approvals (as
hereinafter  defined),  to consummate the  transactions  contemplated  hereby or
thereby.  The  execution  and  delivery  of this  Agreement  and the IES/WPL and
IES/Interstate  Stock  Option  Agreements  and  the  consummation  by IES of the
transactions  contemplated  hereby and thereby have been duly  authorized by all
necessary  corporate  action  on the  part  of IES,  subject  to  obtaining  the
applicable IES  Shareholders'  Approval.  Each of this Agreement and the IES/WPL
and  IES/Interstate  Stock Option  Agreements has been duly and validly executed
and delivered by IES and, assuming the due authorization, execution and delivery
hereof and thereof by the other signatories hereto and thereto,  constitutes the
valid and binding  obligation of IES  enforceable  against it in accordance with
its  terms,  except as may be  limited  by  applicable  bankruptcy,  insolvency,
reorganization  or other similar laws  affecting the  enforcement  of creditors'
rights  generally,  and except  that the  availability  of  equitable  remedies,
including  specific  performance,  may be subject to the discretion of any court
before which any proceeding therefor may be brought.

                  (b)  Non-contravention.  Except as set forth in Section 5.4(b)
of the IES Disclosure Schedule, the execution and delivery of this Agreement and
the IES/WPL and  IES/Interstate  Stock Option  Agreements by IES do not, and the
consummation of the transactions contemplated hereby or thereby will not, result
in a Violation pursuant to any provisions of:

                      (i) the  Articles  of  Incorporation,  By-laws  or similar
         governing  documents of IES or any of the IES  Subsidiaries  or the IES
         Joint Ventures;

                                      -29-

<PAGE>




                      (ii)  subject  to  obtaining  the IES  Required  Statutory
         Approvals  and the  receipt  of the  IES  Shareholders'  Approval,  any
         statute, law, ordinance,  rule,  regulation,  judgment,  decree, order,
         injunction,  writ,  permit or  license  of any  Governmental  Authority
         applicable to IES or any of IES  Subsidiaries  or IES Joint Ventures or
         any of their respective properties or assets, or

                      (iii)  subject to obtaining the  third-party  consents set
         forth in  Section  5.4(b)  of the IES  Disclosure  Schedule  (the  "IES
         Required Consents"), any material note, bond, mortgage, indenture, deed
         of trust, license,  franchise,  permit, concession,  contract, lease or
         other  instrument,  obligation or agreement of any kind to which IES or
         any of the IES  Subsidiaries  or IES  Joint  Ventures  is a party or by
         which it or any of its properties or assets may be bound or affected,

excluding from the foregoing  clauses (ii) and (iii) such  violations  which, in
the aggregate do not, and insofar as reasonably can be foreseen, would not, have
an IES Material Adverse Effect.

                  (c)   Statutory   Approvals.   No   declaration,   filing   or
registration  with, or notice to or  authorization,  consent or approval of, any
Governmental  Authority  is  necessary  for the  execution  and delivery of this
Agreement or the IES/WPL and  IES/Interstate  Stock Option  Agreements by IES or
the  consummation  by IES of the  transactions  contemplated  hereby or thereby,
except as described in Section 5.4(c) of the IES  Disclosure  Schedule (the "IES
Required  Statutory  Approvals",  it being  understood  that  references in this
Agreement to "obtaining" such IES Required Statutory Approvals shall mean making
such declarations, filings or registrations; giving such notices; obtaining such
authorizations, consents or approvals; and having such waiting periods expire as
are necessary to avoid a violation of law).

                  (d)  Compliance.

                      (i) Except as set forth in Section 5.4(d), Section 5.10 or
         Section 5.11 of the IES Disclosure Schedule, or as disclosed in the IES
         SEC Reports (as  hereinafter  defined)  filed prior to the date hereof,
         neither IES nor any of the IES  Subsidiaries  nor, to the  knowledge of
         IES, any IES Joint Venture,  is in violation of, is under investigation
         with  respect to any  violation  of, or has been  given  notice or been
         charged  with  any  violation  of,  any  law,  statute,   order,  rule,
         regulation,  ordinance or judgment (including,  without limitation, any
         applicable   environmental   law,   ordinance  or  regulation)  of  any
         Governmental  Authority,  except for violations which, in the aggregate
         do not, and insofar as reasonably  can be foreseen,  would not, have an
         IES Material Adverse Effect.


                                      -30-

<PAGE>



                      (ii)  Except as set forth in Section  5.4(d) or in Section
         5.11 of the IES Disclosure  Schedule,  IES and the IES Subsidiaries and
         IES  Joint  Ventures  have  all  Permits  necessary  to  conduct  their
         businesses as presently conducted, except those the failure of which to
         obtain,  in the  aggregate  do not,  and insofar as  reasonably  can be
         foreseen, would not, have an IES Material Adverse Effect.

                      (iii)  Except  as set forth in  Section  5.4(d) of the IES
         Disclosure Schedule, each of IES and the IES Subsidiaries and IES Joint
         Ventures is not in breach,  violation, or default in the performance or
         observance  of any term or  provision  of,  and no event  has  occurred
         which, with lapse of time or action by a third party, could result in a
         default under,

                           (A) its Articles of Incorporation or By-laws, or

                           (B) any contract, commitment,  agreement,  indenture,
                  mortgage, loan agreement, note, lease, bond, license, approval
                  or other  instrument  to which it is a party or by which it is
                  bound or to which any of its  property is subject,  except for
                  breaches,  violations or defaults  which,  in the aggregate do
                  not, and insofar as  reasonably  can be  foreseen,  would not,
                  have an IES Material Adverse Effect.

                  Section 5.5  Reports and Financial Statements.

                  (a)  The  filings  required  to be  made  by IES  and  the IES
Subsidiaries  since January 1, 1992 under the Securities  Act, the Exchange Act,
the 1935 Act, the Power Act, the Atomic Energy Act and applicable state laws and
regulations  have been filed  with the SEC,  the FERC,  the NRC,  the DOE or any
appropriate state public utilities commission, as the case may be, including all
forms,  statements,  reports,  agreements  (oral or written) and all  documents,
exhibits,  amendments and supplements  appertaining thereto, and complied, as of
their   respective   dates,  in  all  material   respects  with  all  applicable
requirements  of  the   appropriate   statute  and  the  rules  and  regulations
thereunder.

                  (b) IES has made  available  to WPL and  Interstate a true and
complete  copy  of each  form,  report,  schedule,  registration  statement  and
definitive proxy statement filed by each of IES and Utilities with the SEC since
January  1, 1992 (as such  documents  have since the time of their  filing  been
amended or supplemented,  the "IES SEC Reports") and each other filing described
in Section 5.5(a).  As of their  respective  dates,  the IES SEC Reports did not
contain any untrue statement of a material fact or omit to state a material fact
required to be stated  therein or necessary to make the statements  therein,  in
light of the circumstances under which they were made, not misleading.


                                      -31-

<PAGE>



                  (c)  The  audited   consolidated   financial   statements  and
unaudited interim financial statements of IES and Utilities, as the case may be,
included in the IES SEC Reports  (collectively,  the "IES Financial Statements")
have been prepared in accordance  with GAAP (except as may be indicated  therein
or in the notes  thereto  and except with  respect to  unaudited  statements  as
permitted  by Form 10-Q  under  the  Exchange  Act) and  fairly  present  in all
material  respects the financial  position of IES or Utilities,  as the case may
be, as of the dates thereof and the results of its operations and cash flows for
the periods then ended,  subject, in the case of the unaudited interim financial
statements, to normal, recurring audit adjustments.

                  (d)  True,  accurate  and  complete  copies  of  the  Restated
Articles of  Incorporation  and By-laws of IES, as in effect on the date hereof,
are included (or incorporated by reference) in the IES SEC Reports.

                  Section  5.6 Absence of Certain  Changes or Events.  Except as
disclosed in the IES SEC Reports  filed prior to the date hereof or as set forth
in Section 5.6 of the IES Disclosure Schedule,  since December 31, 1994, IES and
each of the IES  Subsidiaries  and  IES  Joint  Ventures  have  conducted  their
businesses only in the ordinary course of their respective businesses consistent
with past  practice  and there has not been,  and no facts or  conditions  exist
(other than facts or conditions  of general  applicability  to electric  utility
companies in the region in which WPL, IES and Interstate  operate) which, in the
aggregate  have or,  insofar as reasonably  can be foreseen,  would have, an IES
Material Adverse Effect.

                  Section 5.7  Litigation.  Except as  disclosed  in the IES SEC
Reports  filed prior to the date hereof or as set forth in Section 5.7,  Section
5.9 or Section 5.11 of the IES Disclosure Schedule,

                  (a) there are no claims, suits, actions or proceedings pending
         or,  to the  knowledge  of  IES,  threatened,  nor  are  there,  to the
         knowledge of IES, any  investigations  or reviews pending or threatened
         against,  relating to or affecting  IES or any of the IES  Subsidiaries
         and, to the knowledge of IES, the IES Joint Ventures;

                  (b) there have not been any  developments  since  December 31,
         1994  with  respect  to  such   disclosed   claims,   suits,   actions,
         proceedings, investigations or reviews; and

                  (c) there are no  judgments,  decrees,  injunctions,  rules or
         orders  of any  court,  governmental  department,  commission,  agency,
         instrumentality or authority or any arbitrator applicable to IES or any
         of the IES Subsidiaries  and, to the knowledge of IES, or the IES Joint
         Ventures,


                                      -32-

<PAGE>



which, when taken together with any other nondisclosures of matters described in
clauses (a), (b) and (c), have, or insofar as reasonably can be foreseen,  would
have, an IES Material Adverse Effect.


                  Section 5.8  Registration Statement and Proxy Statement.

                  (a) None of the  information  supplied or to be supplied by or
on behalf of IES for inclusion or incorporation by reference in:

                      (i) the  Registration  Statement  will,  at the  time  the
         Registration Statement is filed with the SEC and at the time it becomes
         effective under the Securities Act,  contain any untrue  statement of a
         material  fact or omit to state any material fact required to be stated
         therein or necessary to make the statements  therein,  not  misleading,
         and

                      (ii) the  Proxy  Statement  will,  at the date  mailed  to
         shareholders  and at the times of the  meetings of  shareholders  to be
         held in connection with the IES Merger, contain any untrue statement of
         a  material  fact or omit to state any  material  fact  required  to be
         stated therein or necessary in order to make the statements therein, in
         light of the circumstances under which they are made, not misleading.

                  (b) The  Registration  Statement and the Proxy  Statement will
comply as to form in all material respects with the provisions of the Securities
Act and the Exchange Act, respectively, and the applicable rules and regulations
thereunder.

                  Section 5.9 Tax Matters. Except as set forth in Section 5.9 of
the IES Disclosure Schedule:

                  (a)  Filing of  Timely  Tax  Returns.  IES and each of the IES
Subsidiaries  have filed (or there has been filed on its behalf) all Tax Returns
required to be filed by each of them under  applicable law. All such Tax Returns
were and are in all material respects true,  complete and correct and filed on a
timely basis.

                  (b)  Payment  of Taxes.  IES and each of the IES  Subsidiaries
have,  within the time and in the manner  prescribed by law, paid all Taxes that
are currently due and payable  except for those  contested in good faith and for
which adequate reserves have been taken.

                  (c)  Tax  Reserves.   IES  and  the  IES   Subsidiaries   have
established on their books and records reserves adequate to pay

                                      -33-

<PAGE>



all Taxes and reserves for deferred income taxes in accordance with GAAP.

                  (d) Tax  Liens.  There are no Tax liens upon the assets of IES
or any of the IES Subsidiaries except liens for Taxes not yet due.

                  (e) Withholding  Taxes.  IES and each of the IES  Subsidiaries
have complied in all material  respects with the provisions of the Code relating
to the withholding of Taxes, as well as similar provisions under any other laws,
and have,  within the time and in the manner  prescribed  by law,  withheld from
employee wages and paid over to the proper governmental  authorities all amounts
required.

                  (f) Extensions of Time for Filing Tax Returns. Neither IES nor
any of the IES  Subsidiaries has requested any extension of time within which to
file any Tax Return, which Tax Return has not since been timely filed.

                  (g) Waivers of Statute of Limitations.  Neither IES nor any of
the IES Subsidiaries has executed any outstanding waivers or comparable consents
regarding  the  application  of the statute of  limitations  with respect to any
Taxes or Tax Returns.

                  (h)  Expiration  of Statute  of  Limitations.  The  statute of
limitations  for the  assessment of all Taxes has expired for all applicable Tax
Returns of IES and each of the IES  Subsidiaries  or those Tax Returns have been
examined by the appropriate  taxing authorities for all Tax periods ended before
the date hereof, and no deficiency for any Taxes has been proposed,  asserted or
assessed against IES or any of the IES  Subsidiaries  that has not been resolved
and paid in full.

                  (i) Audit,  Administrative and Court Proceedings. No audits or
other administrative proceedings or court proceedings are presently pending with
regard to any Taxes or Tax Returns of IES or any of the IES Subsidiaries.

                  (j) Powers of  Attorney.  No power of  attorney  currently  in
force has been granted by IES or any of the IES Subsidiaries  concerning any Tax
matter.

                  (k) Tax Rulings.  Neither IES nor any of the IES  Subsidiaries
has  received a Tax Ruling or entered into a Closing  Agreement  with any taxing
authority that would have a continuing adverse effect after the Closing Date.

                  (l) Availability of Tax Returns. IES has made available to WPL
and  Interstate  complete  and  accurate  copies  covering  the six years  ended
December 31, 1994 of (i) all Tax Returns,  and any amendments thereto,  filed by
IES or any of the IES  Subsidiaries,  (ii) all audit  reports  received from any
taxing authority relating to any Tax Return filed by IES or any of the

                                      -34-

<PAGE>



IES Subsidiaries, and (iii) any Closing Agreements entered into by IES or any of
the IES Subsidiaries with any taxing authority.

                  (m) Tax Sharing Agreements. Neither IES nor any IES Subsidiary
is a party to any agreement relating to allocating or sharing of Taxes.

                  (n) Code Section 280G.  Except as set forth in Section  5.9(n)
of the IES Disclosure Schedule, neither IES nor any of the IES Subsidiaries is a
party to any agreement,  contract,  or arrangement that could result, on account
of the transactions  contemplated hereunder,  separately or in the aggregate, in
the payment of any  "excess  parachute  payments"  within the meaning of Section
280G of the Code.

                  (o)  Liability  for  Others.  None  of IES  or any of the  IES
Subsidiaries  has any  liability  for Taxes of any person other than IES and the
IES Subsidiaries (i) under Treasury Regulations Section 1.1502-6 (or any similar
provision of state, local or foreign law) as a transferee or successor,  (ii) by
contract, or (iii) otherwise.

                  Section 5.10 Employee Matters; ERISA.

                  (a)  Benefit  Plans.  Section  5.10(a)  of the IES  Disclosure
Schedule  contains  a true and  complete  list of each  employee  benefit  plan,
program or arrangement covering employees,  former employees or directors of IES
and each of the IES Subsidiaries or their  beneficiaries,  or providing benefits
to such persons in respect of services  provided to any such entity,  including,
but not limited to, employee benefit plans within the meaning of Section 3(3) of
ERISA and any severance or change in control agreement  (collectively,  the "IES
Benefit  Plans").  For the purposes of this  Section  5.10 only,  the term "IES"
shall be deemed to include the predecessors of such company.

                  (b)  Contributions.  Except as set forth in Section 5.10(b) of
the IES  Disclosure  Schedule,  all material  contributions  and other  payments
required  to be made by IES or any of the IES  Subsidiaries  to any IES  Benefit
Plan (or to any  person  pursuant  to the terms  thereof)  have been made or the
amount of such payment or contribution  obligation has been reflected in the IES
Financial Statements.

                  (c) Qualification;  Compliance. Except as set forth in Section
5.10(c) of the IES Disclosure  Schedule,  each of the IES Benefit Plans intended
to be  "qualified"  within the  meaning  of Section  401(a) of the Code has been
determined  by the IRS to be so  qualified,  and,  to the  knowledge  of IES, no
circumstances  exist  that  are  reasonably  expected  by IES to  result  in the
revocation of any such determination. IES is in compliance in all respects with,
and each of the IES Benefit  Plans is and has been  operated in all  respects in
compliance with, all applicable laws, rules and regulations  governing each such
plan, including,

                                      -35-

<PAGE>



without  limitation,  ERISA and the Code, except for any violations that, in the
aggregate do not, and insofar as  reasonably  can be foreseen,  would not,  give
rise to an IES  Material  Adverse  Effect.  Each IES  Benefit  Plan  intended to
provide  for  the  deferral  of  income,   the  reduction  of  salary  or  other
compensation,  or to afford other income tax benefits,  complies in all material
respects with the requirements of the applicable provisions of the Code or other
laws, rules and regulations required to provide such income tax benefits.

                  (d)  Liabilities.  With  respect  to the  IES  Benefit  Plans,
individually and in the aggregate,  no event has occurred, and, to the knowledge
of IES,  there does not now exist any  condition  or set of  circumstances  that
could subject IES or any of the IES Subsidiaries to any liability  arising under
the Code, ERISA or any other applicable law (including,  without limitation, any
liability  of any kind  whatsoever,  whether  direct  or  indirect,  contingent,
inchoate or  otherwise,  to any such plan or the PBGC),  or under any  indemnity
agreement to which IES is subject, which liability, excluding liability for PBGC
premiums, benefit claims and funding obligations payable in the ordinary course,
has, or insofar as  reasonably  can be  foreseen,  would have,  an IES  Material
Adverse Effect.

                  (e) Welfare  Plans.  Except a set forth in Section  5.10(e) of
the IES  Disclosure  Schedule,  none of the IES Benefit  Plans that are "welfare
plans"  within the meaning of Section  3(1) of ERISA,  provides for any benefits
payable  to or on  behalf of any  employee  or  director  after  termination  of
employment  or service,  as the case may be,  other than  elective  continuation
coverage  required to be provided  under  Section 4980B of the Code or Part 6 of
Title I of ERISA or  coverage  which  expires at the end of the  calendar  month
following such event.

                  (f) Documents  made  Available.  IES has made available to WPL
and Interstate a true and correct copy of each collective  bargaining  agreement
to which IES or any of the IES Subsidiaries is a party or under which IES or any
of the IES  Subsidiaries  has obligations  and, with respect to each IES Benefit
Plan, where applicable,

                      (i) such plan and summary plan description,

                      (ii) the most recent annual report filed with the IRS,

                      (iii) each related trust  agreement,  insurance  contract,
         service  provider or investment  management  agreement  (including  all
         amendments to each such document),

                      (iv) the most recent determination of the IRS with respect
         to the qualified status of such IES Benefit Plan, and


                                      -36-

<PAGE>



                      (v) the most recent actuarial report or valuation.

                  (g) Payments  Resulting  from  Merger.  Except as set forth in
Section 5.10(g) of the IES Disclosure Schedule:

                      (i) The  consummation  or  announcement of any transaction
         contemplated  by this  Agreement  will  not  (either  alone or upon the
         occurrence of any additional or further acts or events) result in any

                           (A) payment  (whether of severance  pay or otherwise)
                  becoming  due from IES or any of the IES  Subsidiaries  to any
                  officer,  employee,  former employee or director thereof or to
                  the  trustee  under any "rabbi  trust" or similar  arrangement
                  that  would  not  have  been  paid  without   regard  to  such
                  consummation or announcement or

                           (B)  benefit   under  any  IES  Benefit   Plan  being
                  established or becoming accelerated, vested or payable; and

                      (ii)  neither  IES nor any of the  IES  Subsidiaries  is a
         party to

                           (A)    any    management,     employment,    deferred
                  compensation,  severance  (including  any  payment,  right  or
                  benefit  resulting  from a change in control),  bonus or other
                  contract for personal  services with any officer,  director or
                  employee,

                           (B) any consulting contract with any person who prior
                  to entering  into such  contract  was a director or officer of
                  IES, or

                           (C) any  material  plan,  agreement,  arrangement  or
                  understanding similar to any of the foregoing.

                  (h) Labor  Agreements.  Except as set forth in Section 5.10(h)
of the IES Disclosure  Schedule,  as of the date hereof,  neither IES nor any of
the IES Subsidiaries is a party to any collective  bargaining agreement or other
labor agreement with any union or labor  organization.  To the knowledge of IES,
as of the  date  hereof,  there  is no  current  union  representation  question
involving employees of IES or any of the IES Subsidiaries,  nor does IES know of
any activity or proceeding of any labor organization (or representative thereof)
or employee group to organize any such employees. Except as disclosed in the IES
SEC  Reports  filed  prior to the date  hereof or in Section  5.10(h) of the IES
Disclosure Schedule,

                      (i) there is no material unfair labor practice, employment
         discrimination  or  other  complaint  against  IES or  any  of the  IES
         Subsidiaries pending, or to the knowledge of IES, threatened,

                                      -37-

<PAGE>




                      (ii) there is no  strike,  lockout  or  material  dispute,
         slowdown  or  work  stoppage  pending,  or to  the  knowledge  of  IES,
         threatened,  against or involving  IES or any of the IES  Subsidiaries,
         and

                      (iii) there is no material proceeding, claim, suit, action
         or  governmental  investigation  pending or, to the  knowledge  of IES,
         threatened,  in respect of which any  director,  officer,  employee  or
         agent of IES or any of the IES  Subsidiaries  is or may be  entitled to
         claim indemnification from IES or such IES Subsidiary pursuant to their
         respective Articles of Incorporation or By-laws.

                  Section 5.11 Environmental Protection.  Except as set forth in
Section  5.11 of the IES  Disclosure  Schedule or in the IES SEC  Reports  filed
prior to the date hereof:

                  (a)  Compliance.

                      (i)  Each of IES and the IES  Subsidiaries  and IES  Joint
         Ventures  is in  compliance  with all  applicable  Environmental  Laws,
         except where the failure to be in  compliance,  in the  aggregate  does
         not, and insofar as reasonably  can be foreseen,  would not, have a IES
         Material Adverse Effect; and

                      (ii) neither IES nor any of the IES  Subsidiaries  and IES
         Joint  Ventures has received any  communication  (written or oral) from
         any person or  Governmental  Authority  that alleges that IES or any of
         the IES  Subsidiaries  and IES Joint Ventures is not in such compliance
         with applicable Environmental Laws.

                  (b)   Environmental   Permits.   Each   of  IES  and  the  IES
Subsidiaries  has  obtained  all   Environmental   Permits   necessary  for  the
construction  of  their  facilities  and the  conduct  of their  operations,  as
applicable,  and all such  Environmental  Permits are in good standing or, where
applicable,  a renewal  application  has been timely filed and is pending agency
approval,  and IES and the IES Subsidiaries are in compliance with all terms and
conditions of the Environmental Permits,  except where the failure to be in such
compliance,  in the  aggregate  does  not,  and  insofar  as  reasonably  can be
foreseen, would not, have an IES Material Adverse Effect.

                  (c) Environmental  Claims. There is no material  Environmental
Claim pending

                      (i)  against  IES or any of the  IES  Subsidiaries  or IES
         Joint Ventures,

                      (ii) against any person or entity whose  liability for any
         Environmental Claim IES or any of the IES

                                      -38-

<PAGE>



         Subsidiaries  has or may have retained or assumed either  contractually
         or by operation of law, or

                      (iii) against any real or personal  property or operations
         which IES or any of the IES Subsidiaries  owns,  leases or manages,  in
         whole or in part.

                  (d) Releases. To the knowledge of IES, there have not been any
material  Releases of any Hazardous  Material that would be reasonably likely to
form the basis of any material Environmental Claim against IES or any of the IES
Subsidiaries,  or against any person or entity whose  liability for any material
Environmental  Claim IES or any of the IES Subsidiaries has or may have retained
or assumed either contractually or by operation of law.

                  (e) Predecessors. To the knowledge of IES, with respect to any
predecessor  of  IES  or  any of the  IES  Subsidiaries,  there  is no  material
Environmental  Claim  pending  or  threatened,  and there has been no Release of
Hazardous  Materials  that would be  reasonably  likely to form the basis of any
material Environmental Claim.

                  (f) Disclosure.  To IES's knowledge, IES has disclosed to each
of WPL and Interstate all material facts which IES reasonably  believes form the
basis of a material Environmental Claim arising from

                      (i) the cost of IES pollution control equipment  currently
         required or known to be required in the future;

                      (ii)  current  IES  remediation  costs or IES  remediation
         costs known to be required in the future; or

                      (iii) any other environmental  matter affecting IES or the
         IES Subsidiaries or IES Joint Ventures.

                  Section 5.12  Regulation as a Utility.  Utilities is regulated
as a public  utility in the State of Iowa and in no other  state.  Except as set
forth  in  Section  5.12 of the IES  Disclosure  Schedule,  neither  IES nor any
"subsidiary  company" or "affiliate" of IES is subject to regulation as a public
utility or public service company (or similar designation) by any other state in
the United States or any foreign country. IES is an exempt holding company under
Section 3(a)(1) of the 1935 Act.

                  Section 5.13 Vote  Required.  The approval by the holders of a
majority of the votes  entitled  to be cast by all  holders of IES Common  Stock
(the "IES  Shareholders'  Approval") to approve the IES Merger, is the only vote
of the holders of any class or series of capital  stock of IES  required for any
of the transactions required by this Agreement or the Stock Option Agreements to
which IES is a party.


                                      -39-

<PAGE>



                  Section  5.14  Accounting  Matters.  Neither IES nor, to IES's
knowledge,  any of its  Affiliates  has taken or agreed to take any action  that
would prevent IES from accounting for the  transactions to be effected  pursuant
to this  Agreement  as a  pooling  of  interests  in  accordance  with  GAAP and
applicable SEC regulations.

                  Section 5.15  Applicability of Certain Iowa Law, Etc. Assuming
the  representations  and warranties of WPL and Interstate made in Sections 4.18
and 6.18,  respectively,  are correct,  none of the "fair price"  provisions  of
Section  502.214.7 of the IBCA, or any other takeover related  provisions of the
IBCA (or, to the  knowledge  of IES,  any other  similar  state  statute) or the
Restated  Articles  of  Incorporation  or  By-laws of IES is  applicable  to the
transaction  contemplated by this Agreement,  including the granting or exercise
of the IES/WPL and  IES/Interstate  Stock Option Agreements (except as set forth
on Schedule 5.15 of the IES Disclosure Schedule).

                  Section  5.16  Opinion of  Financial  Advisor.  As of the date
hereof,  IES has  received  the  opinion  of Morgan  Stanley & Co.  Incorporated
("Morgan"),  to the effect that,  as of the date hereof,  the IES Ratio,  taking
into account the Interstate Ratio, is fair from a financial point of view to the
holders of IES Common Stock.

                  Section 5.17 Insurance. Except as set forth in Section 5.17 of
the IES Disclosure  Schedule,  each of IES and the IES  Subsidiaries is, and has
been continuously  since January 1, 1990,  insured with financially  responsible
insurers in such amounts and against  such risks and losses as are  customary in
all material respects for companies conducting the business conducted by IES and
the IES  Subsidiaries  during such time  period.  Except as set forth in Section
5.17 of the IES Disclosure Schedule, neither IES nor any of the IES Subsidiaries
has  received  any notice of  cancellation  or  termination  with respect to any
material  insurance policy of IES or any of the IES Subsidiaries.  The insurance
policies  of IES and each of the IES  Subsidiaries  are  valid  and  enforceable
policies in all material respects.

                  Section 5.18  Ownership of WPL and  Interstate  Common  Stock.
Except as set forth in Section 5.18 of the IES Disclosure  Schedule,  and except
pursuant  to  the  terms  of  the  WPL/IES   Stock  Option   Agreement  and  the
Interstate/IES Stock Option Agreement,  IES does not "beneficially own" (as such
term is defined for purposes of Section 13(d) of the Exchange Act) any shares of
WPL Common Stock or Interstate Common Stock.

                  Section  5.19 IES Rights  Agreement.  Assuming the accuracy of
the representations contained in Sections 4.18 and 6.18, the consummation of the
transactions contemplated by this Agreement will not result in the triggering of
any right or entitlement of IES shareholders under the Rights Agreement, dated

                                      -40-

<PAGE>



as of  November 6, 1991,  between IES and IES, as rights  agent (the "IES Rights
Agreement").

                  Section 5.20 Operations of Nuclear Power Plant.  Except as set
forth in Section 5.20 of the IES  Disclosure  Schedule,  the  operations  of the
Duane Arnold Energy  Center  ("DAEC")  owned by IES (together  with Central Iowa
Power  Cooperative  and Cornbelt  Power  Cooperative,  as tenants in common) and
operated by IES, have at all times been conducted in compliance  with applicable
health,  safety,  regulatory  and other  legal  requirements,  except  where the
failure  to be in  compliance  in the  aggregate  does not,  and  insofar as can
reasonably be foreseen,  would not, have an IES Material  Adverse  Effect.  DAEC
maintains  emergency plans designed to respond to an unplanned release from DAEC
of radioactive  materials into the environment.  Customary  liability  insurance
consistent  with industry  practice and consistent  with IES's view of the risks
inherent in the  operation of a nuclear  power  facility  currently  exists with
respect to DAEC.  Plans for the  decommissioning  of DAEC and for the short-term
storage of spent nuclear fuel conform with the  requirements  of applicable law,
and  such  plans  have  at  all  times  been  funded  consistently  with  budget
projections for such plans.


                                   ARTICLE VI

                  REPRESENTATIONS AND WARRANTIES OF INTERSTATE

                  Interstate represents and warrants to WPL and IES as follows:

                  Section  6.1  Organization  and  Qualification.  Except as set
forth in Section 6.1 of the Disclosure  Schedule to this Agreement  prepared and
delivered  by  Interstate  (the  "Interstate  Disclosure  Schedule"),   each  of
Interstate  and  the  Interstate  Subsidiaries  (as  hereinafter  defined)  is a
corporation duly organized, validly existing and in good standing (to the extent
applicable)  under the laws of its respective  jurisdiction of  incorporation or
organization, has all requisite corporate power and authority, and has been duly
authorized by all necessary  approvals and orders to own,  lease and operate its
assets and  properties to the extent owned,  leased and operated and to carry on
its  business as it is now being  conducted  and is duly  qualified  and in good
standing  (to  the  extent   applicable)  to  do  business  in  each  respective
jurisdiction  in which the nature of its business or the ownership or leasing of
its assets and properties makes such qualification necessary, other than in such
jurisdictions  where the failure to be so qualified and in good  standing  would
not, when taken together with all other such failures,  have a material  adverse
effect on the business, operations,  properties, assets, condition (financial or
otherwise),  or the  results of  operations  of  Interstate  and the  Interstate
Subsidiaries taken as a whole or on the consummations

                                      -41-

<PAGE>



of  the  transactions  contemplated  hereby  (an  "Interstate  Material  Adverse
Effect").

                  Section 6.2  Subsidiaries.

                  (a) Section 6.2 of the  Interstate  Disclosure  Schedule  sets
forth a description as of the date hereof,  of all Interstate  Subsidiaries  and
Interstate  Joint  Ventures,  including  (i) the name of each  such  entity  and
Interstate's  interest  therein,  and (ii) a brief  description of the principal
line or lines of business conducted by each such entity.

                  (b)  Except  as set  forth in  Section  6.2 of the  Interstate
Disclosure  Schedule,  none of the Interstate  Subsidiaries is a "public utility
company," a "holding  company," a "subsidiary  company" or an "affiliate" of any
public utility company within the meaning of Section 2(a)(5),  2(a)(7),  2(a)(8)
or 2(a)(11) of the 1935 Act, respectively.

                  (c)  Except  as set  forth in  Section  6.2 of the  Interstate
Disclosure  Schedule,  all of the issued and outstanding shares of capital stock
of each Interstate  Subsidiary are duly authorized,  validly issued, fully paid,
nonassessable  and  free of  preemptive  rights,  and  are  owned,  directly  or
indirectly,  by Interstate  free and clear of any liens,  claims,  encumbrances,
security interests,  equities, charges and options of any nature whatsoever, and
there  are no  outstanding  subscriptions,  options,  calls,  contracts,  voting
trusts,   proxies   or   other   commitments,   understandings,    restrictions,
arrangements,  rights or warrants, including any right of conversion or exchange
under any outstanding  security,  instrument or other agreement,  obligating any
such  Interstate  Subsidiary  to issue,  deliver or sell, or cause to be issued,
delivered  or sold,  additional  shares of its capital  stock or granting to any
person  other  than  Interstate  or  any  Interstate  Subsidiary  any  right  to
participate  in its dividends or earnings or  obligating it to grant,  extend or
enter into any such agreement or commitment.

                  (d) As used in this Agreement,

                      (i) "Interstate  Subsidiary"  shall mean any Subsidiary of
         Interstate; and

                      (ii)  "Interstate  Joint  Venture"  shall  mean any  Joint
         Venture of Interstate or any Interstate Subsidiary.

                  Section 6.3  Capitalization.

                  (a) The authorized capital stock of Interstate consists of

                      (i) 30,000,000  shares of Interstate Common Stock of which
         9,564,287 shares were issued and outstanding as of September 30, 1995,

                                      -42-

<PAGE>




                      (ii) 2,000,000  shares of Interstate  Preferred Stock were
         authorized,  of which 761,381 shares of the 4.36% series, 4.68% series,
         6.40%  series  and 7.76%  series  were  issued  and  outstanding  as of
         September 30, 1995, and

                      (iii)  2,000,000  shares of Interstate  Preference  Stock,
         $1.00 par  value,  of which  none were  issued  and  outstanding  as of
         September 30, 1995.

                  (b) All of the issued  and  outstanding  shares of  Interstate
Common Stock and  Interstate  Preferred  Stock are, and any shares of Interstate
Common Stock issued  pursuant to the  Interstate/WPL  and  Interstate/IES  Stock
Option  Agreements  will  be,  duly  authorized,  validly  issued,  fully  paid,
nonassessable and free of preemptive rights.

                  (c)  Except  as set  forth in  Section  6.3 of the  Interstate
Disclosure   Schedule,   as  of  the  date  hereof,  there  are  no  outstanding
subscriptions,  options,  calls,  contracts,  voting  trusts,  proxies  or other
commitments,  understandings,  restrictions,  arrangements,  rights or warrants,
including any right of conversion or exchange  under any  outstanding  security,
instrument or other  agreement,  obligating  Interstate or any of the Interstate
Subsidiaries  to issue,  deliver or sell,  or cause to be issued,  delivered  or
sold,  additional  shares of the  capital  stock of  Interstate,  or  obligating
Interstate  to grant,  extend or enter into any such  agreement  or  commitment,
other than under the Interstate/WPL and Interstate/IES Stock Option Agreements.

                  Section 6.4 Authority; Non-contravention; Statutory Approvals;
Compliance.

                  (a) Authority.  Interstate has all requisite  corporate  power
and  authority  to  enter  into  this  Agreement  and  the   Interstate/WPL  and
Interstate/IES   Stock  Option  Agreements,   and,  subject  to  the  applicable
Interstate  Shareholders'  Approval (as hereinafter  defined) and the applicable
Interstate Required Statutory Approvals (as hereinafter  defined), to consummate
the transactions  contemplated hereby or thereby.  The execution and delivery of
this Agreement and the Interstate/WPL and Interstate/IES Stock Option Agreements
and the consummation by Interstate of the transactions  contemplated  hereby and
thereby have been duly authorized by all necessary  corporate action on the part
of  Interstate,  subject to obtaining the  applicable  Interstate  Shareholders'
Approval. Each of this Agreement and the Interstate/WPL and Interstate/IES Stock
Option Agreements has been duly and validly executed and delivered by Interstate
and, assuming the due  authorization,  execution and delivery hereof and thereof
by the other signatories  hereto and thereto,  constitutes the valid and binding
obligation of Interstate  enforceable  against it in accordance  with its terms,
except as may be limited by applicable bankruptcy, insolvency, reorganization or
other similar laws affecting the enforcement of creditors' rights generally, and
except that the availability of equitable

                                      -43-

<PAGE>



remedies,  including specific  performance,  may be subject to the discretion of
any court before which any proceeding therefor may be brought.

                  (b)  Non-contravention.  Except as set forth in Section 6.4(b)
of the  Interstate  Disclosure  Schedule,  the  execution  and  delivery of this
Agreement and the Interstate/WPL  and Interstate/IES  Stock Option Agreements by
Interstate do not, and the consummation of the transactions  contemplated hereby
or thereby will not, result in a Violation pursuant to any provisions of:

                      (i) the  Articles  of  Incorporation,  By-laws  or similar
         governing documents of Interstate or any of the Interstate Subsidiaries
         or Interstate Joint Ventures;

                      (ii)  subject  to  obtaining   the   Interstate   Required
         Statutory  Approvals  and the receipt of the  Interstate  Shareholders'
         Approval,  any statute,  law, ordinance,  rule,  regulation,  judgment,
         decree, order, injunction,  writ, permit or license of any Governmental
         Authority   applicable  to   Interstate   or  any  of  the   Interstate
         Subsidiaries  or Interstate  Joint Ventures or any of their  respective
         properties or assets; or

                      (iii)  subject to obtaining the  third-party  consents set
         forth in Section  6.4(b) of the  Interstate  Disclosure  Schedule  (the
         "Interstate  Required  Consents"),  any material note, bond,  mortgage,
         indenture,  deed of  trust,  license,  franchise,  permit,  concession,
         contract,  lease or other  instrument,  obligation  or agreement of any
         kind to which  Interstate or any of the Interstate  Subsidiaries or the
         Interstate  Joint  Ventures  is a party  or by  which  it or any of its
         properties or assets may be bound or affected,

excluding from the foregoing  clauses (ii) and (iii) such  violations  which, in
the aggregate do not, and insofar as reasonably can be foreseen, would not, have
an Interstate Material Adverse Effect.

                  (c)   Statutory   Approvals.   No   declaration,   filing   or
registration  with, or notice to or  authorization,  consent or approval of, any
Governmental  Authority  is  necessary  for the  execution  and delivery of this
Agreement or the Interstate/WPL  and  Interstate/IES  Stock Option Agreements by
Interstate or the  consummation by Interstate of the  transactions  contemplated
hereby or  thereby,  except as  described  in Section  6.4(c) of the  Interstate
Disclosure  Schedule (the "Interstate  Required Statutory  Approvals",  it being
understood  that  references in this  Agreement to "obtaining"  such  Interstate
Required  Statutory  Approvals shall mean making such  declarations,  filings or
registrations;  giving such notices; obtaining such authorizations,  consents or
approvals;  and having such waiting  periods  expire as are necessary to avoid a
violation of law).

                                      -44-

<PAGE>




                  (d)  Compliance.

                      (i) Except as set forth in Section 6.4(d), Section 6.10 or
         Section 6.11 of the Interstate  Disclosure Schedule, or as disclosed in
         the Interstate SEC Reports (as hereinafter  defined) filed prior to the
         date hereof, neither Interstate nor any of the Interstate  Subsidiaries
         nor, to the knowledge of Interstate, any Interstate Joint Venture is in
         violation of, is under  investigation with respect to any violation of,
         or has been given  notice or been charged  with any  violation  of, any
         law,  statute,   order,   rule,   regulation,   ordinance  or  judgment
         (including,  without  limitation,  any  applicable  environmental  law,
         ordinance or  regulation)  of any  Governmental  Authority,  except for
         violations  which,  in the  aggregate do not, and insofar as reasonably
         can be foreseen, would not, have an Interstate Material Adverse Effect.

                      (ii)  Except as set forth in Section  6.4(d) or in Section
         6.11  of  the  Interstate  Disclosure  Schedule,   Interstate  and  the
         Interstate  Subsidiaries and Interstate Joint Ventures have all Permits
         necessary to conduct their  businesses as presently  conducted,  except
         those the  failure of which to obtain,  in the  aggregate  do not,  and
         insofar as  reasonably  can be foreseen,  would not, have an Interstate
         Material Adverse Effect.

                      (iii)  Except  as  set  forth  in  Section  6.4(d)  of the
         Interstate  Disclosure Schedule,  each of Interstate and the Interstate
         Subsidiaries and Interstate Joint Ventures is not in breach,  violation
         or default in the  performance  or  observance of any term or provision
         of, and no event has occurred which,  with lapse of time or action by a
         third party, could result in a default under,

                           (A) its Articles of Incorporation or By-laws, or

                           (B) any contract, commitment,  agreement,  indenture,
                  mortgage, loan agreement, note, lease, bond, license, approval
                  or other  instrument  to which it is a party or by which it is
                  bound or to which any of its  property is subject,  except for
                  breaches,  violations or defaults  which,  in the aggregate do
                  not,  and insofar as can be  reasonably  foreseen,  would not,
                  have an Interstate Material Adverse Effect.

                  Section 6.5  Reports and Financial Statements.

                  (a) The  filings  required  to be made by  Interstate  and the
Interstate  Subsidiaries  since  January 1, 1992 under the  Securities  Act, the
Exchange Act, the Power Act, and applicable state laws and regulations have been
filed  with the  SEC,  the  FERC,  or any  appropriate  state  public  utilities
commission, as

                                      -45-

<PAGE>



the case may be, including all forms, statements,  reports,  agreements (oral or
written) and all documents,  exhibits,  amendments and supplements  appertaining
thereto,  and complied,  as of their respective  dates, in all material respects
with all applicable  requirements of the  appropriate  statute and the rules and
regulations thereunder.

                  (b)  Interstate  has made  available to WPL and IES a true and
complete  copy  of each  form,  report,  schedule,  registration  statement  and
definitive  proxy  statement  filed by Interstate  with the SEC since January 1,
1992 (as such  documents  have since the time of their  filing  been  amended or
supplemented,  the "Interstate SEC Reports") and each other filing  described in
Section 6.5(a). As of their respective dates, the Interstate SEC Reports did not
contain any untrue statement of a material fact or omit to state a material fact
required to be stated  therein or necessary to make the statements  therein,  in
light of the circumstances under which they were made, not misleading.

                  (c)  The  audited   consolidated   financial   statements  and
unaudited interim financial  statements of Interstate included in the Interstate
SEC Reports  (collectively,  the "Interstate  Financial  Statements")  have been
prepared in accordance  with GAAP (except as may be indicated  therein or in the
notes  thereto and except with respect to unaudited  statements  as permitted by
Form 10-Q under the Exchange  Act) and fairly  present in all material  respects
the financial  position of Interstate as of the dates thereof and the results of
its operations and cash flows for the periods then ended,  subject,  in the case
of the  unaudited  interim  financial  statements,  to normal,  recurring  audit
adjustments.

                  (d)  True,  accurate  and  complete  copies  of  the  Restated
Articles of  Incorporation  and By-laws of Interstate,  as in effect on the date
hereof,  are included (or  incorporated  by  reference)  in the  Interstate  SEC
Reports.

                  Section  6.6 Absence of Certain  Changes or Events.  Except as
disclosed in the Interstate SEC Reports filed prior to the date hereof or as set
forth in Section 6.6 of the Interstate  Disclosure Schedule,  since December 31,
1994,  Interstate and each of the Interstate  Subsidiaries  and Interstate Joint
Ventures have conducted  their  businesses  only in the ordinary course of their
respective  businesses consistent with past practice and there has not been, and
no facts  or  conditions  exist  (other  than  facts or  conditions  of  general
applicability to electric utility  companies in the region in which WPL, IES and
Interstate  operate)  which, in the aggregate have or, insofar as reasonably can
be foreseen, would have, an Interstate Material Adverse Effect.

                  Section 6.7 Litigation.  Except as disclosed in the Interstate
SEC  Reports  filed  prior to the date  hereof or as set forth in  Section  6.7,
Section 6.9 or Section 6.11 of the Interstate Disclosure Schedule,

                                      -46-

<PAGE>




                  (a) there are no claims, suits, actions or proceedings pending
         or, to the knowledge of Interstate,  threatened,  nor are there, to the
         knowledge  of  Interstate,  any  investigations  or reviews  pending or
         threatened against,  relating to or affecting  Interstate or any of the
         Interstate  Subsidiaries  and,  to the  knowledge  of  Interstate,  the
         Interstate Joint Ventures;

                  (b) there have not been any  developments  since  December 31,
         1994  with  respect  to  such   disclosed   claims,   suits,   actions,
         proceedings, investigations or reviews; and

                  (c) there are no  judgments,  decrees,  injunctions,  rules or
         orders  of any  court,  governmental  department,  commission,  agency,
         instrumentality or authority or any arbitrator applicable to Interstate
         or  any  of the  Interstate  Subsidiaries  and,  to  the  knowledge  of
         Interstate, the Interstate Joint Ventures,

which, when taken together with any other nondisclosures of matters described in
clauses (a), (b) and (c), have, or insofar as reasonably can be foreseen,  would
have, an Interstate Material Adverse Effect.

                  Section 6.8 Registration Statement and Proxy Statement.

                  (a) None of the  information  supplied or to be supplied by or
on behalf of Interstate for inclusion or incorporation by reference in

                      (i) the  Registration  Statement  will,  at the  time  the
         Registration Statement is filed with the SEC and at the time it becomes
         effective under the Securities Act,  contain any untrue  statement of a
         material  fact or omit to state any material fact required to be stated
         therein or necessary to make the statements therein not misleading, and

                      (ii) the  Proxy  Statement  will,  at the date  mailed  to
         shareholders  and at the times of the  meetings of  shareholders  to be
         held in  connection  with the  Interstate  Merger,  contain  any untrue
         statement  of a  material  fact or  omit to  state  any  material  fact
         required  to be  stated  therein  or  necessary  in  order  to make the
         statements  therein, in light of the circumstances under which they are
         made, not misleading.

                  (b) The  Registration  Statement and the Proxy  Statement will
comply as to form in all material respects with the provisions of the Securities
Act and the Exchange Act, respectively, and the applicable rules and regulations
thereunder.


                                      -47-

<PAGE>



                  Section 6.9 Tax Matters. Except as set forth in Section 6.9 of
the Interstate Disclosure Schedule:

                  (a) Filing of Timely Tax Returns.  Interstate  and each of the
Interstate  Subsidiaries  have filed (or there has been filed on its behalf) all
Tax Returns  required to be filed by each of them under applicable law. All such
Tax Returns were and are in all material respects true, complete and correct and
filed on a timely basis.

                  (b) Payment of Taxes.  Interstate  and each of the  Interstate
Subsidiaries have, within the time and in the manner prescribed by law, paid all
Taxes that are  currently  due and payable  except for those  contested  in good
faith and for which adequate reserves have been taken.

                  (c) Tax Reserves.  Interstate and the Interstate  Subsidiaries
have established on their books and records  reserves  adequate to pay all Taxes
and reserves for deferred income taxes in accordance with GAAP.

                  (d) Tax  Liens.  There  are no Tax  liens  upon the  assets of
Interstate or any of the Interstate  Subsidiaries except liens for Taxes not yet
due.

                  (e) Withholding  Taxes.  Interstate and each of the Interstate
Subsidiaries  have complied in all material  respects with the provisions of the
Code relating to the withholding of Taxes, as well as similar  provisions  under
any other laws, and have,  within the time and in the manner  prescribed by law,
withheld  from  employee  wages  and  paid  over  to  the  proper   governmental
authorities all amounts required.

                  (f)  Extensions  of  Time  for  Filing  Tax  Returns.  Neither
Interstate nor any of the Interstate Subsidiaries has requested any extension of
time within  which to file any Tax  Return,  which Tax Return has not since been
timely filed.

                  (g) Waivers of Statute of Limitations.  Neither Interstate nor
any of the  Interstate  Subsidiaries  has  executed any  outstanding  waivers or
comparable consents regarding the application of the statute of limitations with
respect to any Taxes or Tax Returns.

                  (h)  Expiration  of Statute  of  Limitations.  The  statute of
limitations  for the  assessment of all Taxes has expired for all applicable Tax
Returns  of  Interstate  and each of the  Interstate  Subsidiaries  or those Tax
Returns have been examined by the  appropriate  taxing  authorities  for all Tax
periods ended before the date hereof,  and no deficiency  for any Taxes has been
proposed,  asserted  or assessed  against  Interstate  or any of the  Interstate
Subsidiaries that has not been resolved and paid in full.


                                      -48-

<PAGE>



                  (i) Audit,  Administrative and Court Proceedings. No audits or
other administrative proceedings or court proceedings are presently pending with
regard  to any  Taxes or Tax  Returns  of  Interstate  or any of the  Interstate
Subsidiaries.

                  (j) Powers of  Attorney.  No power of  attorney  currently  in
force has been  granted  by  Interstate  or any of the  Interstate  Subsidiaries
concerning any Tax matter.

                  (k) Tax Rulings.  Neither Interstate nor any of the Interstate
Subsidiaries has received a Tax Ruling or entered into a Closing  Agreement with
any taxing  authority  that would have a  continuing  adverse  effect  after the
Closing Date.

                  (l) Availability of Tax Returns. Interstate has made available
to WPL and IES  complete  and  accurate  copies  covering  the six  years  ended
December 31, 1994 of (i) all Tax Returns,  and any amendments thereto,  filed by
Interstate  or  any of the  Interstate  Subsidiaries,  (ii)  all  audit  reports
received  from  any  taxing  authority  relating  to any  Tax  Return  filed  by
Interstate  or  any  of the  Interstate  Subsidiaries,  and  (iii)  any  Closing
Agreements entered into by Interstate or any of the Interstate Subsidiaries with
any taxing authority.

                  (m)  Tax  Sharing  Agreements.   Neither  Interstate  nor  any
Interstate  Subsidiary  is a party to any  agreement  relating to  allocating or
sharing of Taxes.

                  (n)  Code  Section  280G.  Neither  Interstate  nor any of the
Interstate  Subsidiaries is a party to any agreement,  contract,  or arrangement
that  could  result,  on  account of the  transactions  contemplated  hereunder,
separately  or in  the  aggregate,  in the  payment  of  any  "excess  parachute
payments" within the meaning of Section 280G of the Code.

                  (o)  Liability  for Others.  None of  Interstate or any of the
Interstate  Subsidiaries  has any  liability  for Taxes of any person other than
Interstate  and the  Interstate  Subsidiaries  (i)  under  Treasury  Regulations
Section 1.1502-6 (or any similar provision of state,  local or foreign law) as a
transferee or successor, (ii) by contract, or (iii) otherwise.

                  Section 6.10 Employee Matters; ERISA.

                  (a)  Benefit   Plans.   Section   6.10(a)  of  the  Interstate
Disclosure  Schedule  contains a true and complete list of each employee benefit
plan, program or arrangement  covering employees,  former employees or directors
of Interstate and each of the Interstate Subsidiaries or their beneficiaries, or
providing  benefits to such persons in respect of services  provided to any such
entity, including, but not limited to, employee benefit plans within the meaning
of  Section  3(3) of ERISA and any  severance  or change  in  control  agreement
(collectively, the "Interstate Benefit Plans"). For the purposes of this

                                      -49-

<PAGE>



Section  6.10  only,  the term  "Interstate"  shall be  deemed  to  include  the
predecessors of such company.

                  (b)  Contributions.  Except as set forth in Section 6.10(b) of
the  Interstate  Disclosure  Schedule,  all  material  contributions  and  other
payments required to be made by Interstate or any of the Interstate Subsidiaries
to any Interstate  Benefit Plan (or to any person pursuant to the terms thereof)
have been made or the amount of such payment or contribution obligation has been
reflected in the Interstate Financial Statements.

                  (c) Qualification;  Compliance. Except as set forth in Section
6.10(b) of the Interstate  Disclosure  Schedule,  each of the Interstate Benefit
Plans  intended to be  "qualified"  within the meaning of Section  401(a) of the
Code has been determined by the IRS to be so qualified, and, to the knowledge of
Interstate, no circumstances exist that are reasonably expected by Interstate to
result in the revocation of any such determination.  Interstate is in compliance
in all respects with,  and each of the Interstate  Benefit Plans is and has been
operated in all respects in compliance  with,  all  applicable  laws,  rules and
regulations governing each such plan, including,  without limitation,  ERISA and
the Code except for any violations that, in the aggregate do not, and insofar as
reasonably  can be  foreseen,  would not,  give rise to an  Interstate  Material
Adverse  Effect.  Each  Interstate  Benefit  Plan  intended  to provide  for the
deferral of income, the reduction of salary or other compensation,  or to afford
other  income  tax  benefits,   complies  in  all  material  respects  with  the
requirements of the applicable  provisions of the Code or other laws,  rules and
regulations required to provide such income tax benefits.

                  (d) Liabilities. With respect to the Interstate Benefit Plans,
individually and in the aggregate,  no event has occurred, and, to the knowledge
of  Interstate,  there does not now exist any condition or set of  circumstances
that could  subject  Interstate  or any of the  Interstate  Subsidiaries  to any
liability  arising under the Code, ERISA or any other applicable law (including,
without  limitation,  any liability of any kind  whatsoever,  whether  direct or
indirect,  contingent,  inchoate or otherwise to any such plan or the PBGC),  or
under any indemnity  agreement to which Interstate is subject,  which liability,
excluding  liability for PBGC premiums,  benefit claims and funding  obligations
payable in the ordinary  course,  has, or insofar as reasonably can be foreseen,
would have, an Interstate Material Adverse Effect.

                  (e) Welfare Plans.  Except as set forth in Section  6.10(e) of
the Interstate  Disclosure  Schedule,  none of the Interstate Benefit Plans that
are "welfare plans" within the meaning of Section 3(1) of ERISA provides for any
benefits  payable to or on behalf of any employee or director after  termination
of employment or service, as the case may be, other

                                      -50-

<PAGE>



than elective  continuation coverage required to be provided under Section 4980B
of the Code or Part 6 of Title I of ERISA or coverage  which  expires at the end
of the calendar month following such event.

                  (f) Documents made Available. Interstate has made available to
WPL and IES a true and correct copy of each collective  bargaining  agreement to
which Interstate or any of the Interstate Subsidiaries is a party or under which
Interstate  or any of the  Interstate  Subsidiaries  has  obligations  and, with
respect to each Interstate Benefit Plan, where applicable,

                      (i) such plan and summary plan description,

                      (ii) the most recent annual report filed with the IRS,

                      (iii) each related trust  agreement,  insurance  contract,
         service  provider or investment  management  agreement  (including  all
         amendments to each such document),

                      (iv) the most recent determination of the IRS with respect
         to the qualified status of such Interstate Benefit Plan, and

                      (v) the most recent actuarial report or valuation.

                  (g) Payments  Resulting  from  Merger.  Except as set forth in
Section 6.10(g) of the Interstate Disclosure Schedule:

                      (i) The  consummation  or  announcement of any transaction
         contemplated  by this  Agreement  will  not  (either  alone or upon the
         occurrence of any additional or further acts or events) result in any

                           (A) payment  (whether of severance  pay or otherwise)
                  becoming  due  from   Interstate  or  any  of  the  Interstate
                  Subsidiaries  to any  officer,  employee,  former  employee or
                  director  thereof or to the trustee under any "rabbi trust" or
                  similar  arrangement  that  would not have  been paid  without
                  regard to such consummation or announcement, or

                           (B) benefit under any  Interstate  Benefit Plan being
                  established or becoming accelerated, vested or payable; and

                      (ii)  neither   Interstate   nor  any  of  the  Interstate
         Subsidiaries is a party to

                           (A)    any    management,     employment,    deferred
                  compensation,  severance  (including  any  payment,  right  or
                  benefit resulting from a change in control), bonus

                                      -51-

<PAGE>



                  or other  contract  for  personal  services  with any officer,
                  director or employee,

                           (B) any consulting contract with any person who prior
                  to entering  into such  contract  was a director or officer of
                  Interstate, or

                           (C) any  material  plan,  agreement,  arrangement  or
                  understanding similar to any of the foregoing.

                  (h) Labor  Agreements.  Except as set forth in Section 6.10(h)
of the Interstate Disclosure Schedule, as of the date hereof, neither Interstate
nor any of the Interstate  Subsidiaries is a party to any collective  bargaining
agreement or other labor agreement with any union or labor organization.  To the
knowledge  of  Interstate,  as of the date  hereof,  there is no  current  union
representation  question  involving  employees  of  Interstate  or  any  of  the
Interstate Subsidiaries,  nor does Interstate know of any activity or proceeding
of any labor  organization  (or  representative  thereof) or  employee  group to
organize any such  employees.  Except as disclosed in the Interstate SEC Reports
filed  prior  to the  date  hereof  or in  Section  6.10(h)  of  the  Interstate
Disclosure Schedule,

                      (i) there is no material unfair labor practice, employment
         discrimination  or other  complaint  against  Interstate  or any of the
         Interstate  Subsidiaries  pending,  or to the knowledge of  Interstate,
         threatened,

                      (ii) there is no  strike,  lockout  or  material  dispute,
         slowdown or work  stoppage  pending,  or to the knowledge of Interstate
         threatened,  against or involving  Interstate or any of the  Interstate
         Subsidiaries, and

                      (iii) there is no material proceeding, claim, suit, action
         or  governmental   investigation   pending  or,  to  the  knowledge  of
         Interstate,  threatened,  in  respect of which any  director,  officer,
         employee or agent of Interstate or any of the  Interstate  Subsidiaries
         is or may be entitled to claim  indemnification from Interstate or such
         Interstate   Subsidiary   pursuant  to  their  respective  Articles  of
         Incorporation or by-laws.

                  Section 6.11 Environmental Protection.  Except as set forth in
Section 6.11 of the  Interstate  Disclosure  Schedule or in the  Interstate  SEC
Reports filed prior to the date hereof:

                  (a)  Compliance.

                      (i) Each of Interstate and the Interstate Subsidiaries and
         Interstate   Joint  Ventures  is  in  compliance  with  all  applicable
         Environmental  Laws,  except where the failure to be in compliance,  in
         the aggregate does not, and

                                      -52-

<PAGE>



         insofar as  reasonably  can be foreseen,  would not, have an Interstate
         Material Adverse Effect; and

                      (ii)  neither   Interstate   nor  any  of  the  Interstate
         Subsidiaries   and   Interstate   Joint   Ventures   has  received  any
         communication  (written  or  oral)  from  any  person  or  Governmental
         Authority  that  alleges  that  Interstate  or any  of  the  Interstate
         Subsidiaries  and Interstate  Joint  Ventures is not in compliance,  as
         required by clause (i) above, with applicable Environmental Laws.

                  (b)  Environmental   Permits.   Each  of  Interstate  and  the
Interstate Subsidiaries has obtained all Environmental Permits necessary for the
construction  of  their  facilities  and the  conduct  of their  operations,  as
applicable,  and all such  Environmental  Permits are in good standing or, where
applicable,  a renewal  application  has been timely filed and is pending agency
approval, and Interstate and the Interstate  Subsidiaries are in compliance with
all terms and conditions of the Environmental Permits,  except where the failure
to be in such  compliance,  in the aggregate does not, and insofar as reasonably
can be foreseen, would not, have an Interstate Material Adverse Effect.

                  (c) Environmental  Claims. There is no material  Environmental
Claim pending

                      (i)   against   Interstate   or  any  of  the   Interstate
         Subsidiaries or Interstate Joint Ventures,

                      (ii) against any person or entity whose  liability for any
         Environmental  Claim  Interstate or any of the Interstate  Subsidiaries
         has  or  may  have  retained  or  assumed  either  contractually  or by
         operation of law, or

                      (iii) against any real or personal  property or operations
         which Interstate or any of the Interstate  Subsidiaries owns, leases or
         manages, in whole or in part.

                  (d) Releases.  To the knowledge of  Interstate,  there has not
been any material  Releases of any  Hazardous  Material that would be reasonably
likely to form the basis of any material  Environmental Claim against Interstate
or any of the  Interstate  Subsidiaries,  or against any person or entity  whose
liability  for  any  material  Environmental  Claim  Interstate  or  any  of the
Interstate Subsidiaries has or may have retained or assumed either contractually
or by operation of law.

                  (e) Predecessors. To the knowledge of Interstate, with respect
to any predecessor of Interstate or any of the Interstate Subsidiaries, there is
no material  Environmental  Claim pending or  threatened,  and there has been no
Release of Hazardous Materials that would be reasonably likely to form the basis
of any material Environmental Claim.


                                      -53-

<PAGE>



                  (f)  Disclosure.  To  Interstate's  knowledge,  Interstate has
disclosed to each of WPL and IES all material facts which Interstate  reasonably
believes form the basis of a material Environmental Claim arising from

                      (i) the cost of  Interstate  pollution  control  equipment
         currently required or known to be required in the future;

                      (ii) current  Interstate  remediation  costs or Interstate
         remediation costs known to be required in the future; or

                      (iii) any other environmental  matter affecting Interstate
         or the Interstate Subsidiaries or Interstate Joint Ventures.

                  Section 6.12 Regulation as a Utility.  Interstate is regulated
as a public  utility in the States of Iowa,  Illinois  and  Minnesota  and in no
other state.  Except as set forth in Section 6.12 of the  Interstate  Disclosure
Schedule,  no  "subsidiary  company" or  "affiliate" of Interstate is subject to
regulation  as  a  public  utility  or  public   service   company  (or  similar
designation) by any other state in the United States or any foreign country.

                  Section 6.13 Vote  Required.  The approval by the holders of a
majority of the outstanding  shares of Interstate  Common Stock (the "Interstate
Shareholders'  Approval") to approve the  Interstate  Merger is the only vote of
the holders of any class or series of capital stock of  Interstate  required for
any  of the  transactions  required  by  this  Agreement  or  the  Stock  Option
Agreements to which Interstate is a party. The approval by the holders of shares
of Interstate Preferred Stock is not required to approve the Interstate Merger.

                  Section 6.14 Accounting  Matters.  Neither  Interstate nor, to
Interstate's  knowledge,  any of its  Affiliates has taken or agreed to take any
action that would prevent  Interstate from accounting for the transactions to be
effected pursuant to this Agreement as a pooling of interests in accordance with
GAAP and applicable SEC regulations.

                  Section  6.15  Applicability  of Certain  Delaware  Law,  Etc.
Assuming the representations and warranties of WPL and IES made in Sections 4.18
and 5.18,  respectively,  are correct,  none of the provisions of Section 203 of
the  DGCL,  or any  other  takeover  related  provisions  of the DGCL (or to the
knowledge  of  Interstate,  any other  similar  State  statute) or the  Restated
Articles  of  Incorporation  or  By-laws of  Interstate  are  applicable  to the
transactions contemplated by this Agreement,  including the granting or exercise
of the Interstate/WPL and Interstate/IES  Stock Option Agreements (except as set
forth in Section 6.15 of the Interstate Disclosure Schedule.

                                      -54-

<PAGE>




                  Section  6.16  Opinion of Financial  Advisor.  Interstate  has
received the opinion of Salomon  Brothers  Inc  ("Salomon")  dated  November 10,
1995,  to the effect  that,  as of the date  thereof,  the  consideration  to be
received by the holders of Interstate  Common Stock in the Interstate  Merger is
fair from a financial point of view to the holders of Interstate Common Stock.

                  Section 6.17 Insurance. Except as set forth in Section 6.17 of
the  Interstate  Disclosure  Schedule,  each of  Interstate  and the  Interstate
Subsidiaries is, and has been continuously  since January 1, 1990,  insured with
financially  responsible  insurers in such  amounts  and against  such risks and
losses as are customary in all material  respects for companies  conducting  the
business  conducted by Interstate  and the Interstate  Subsidiaries  during such
time period.  Except as set forth in Section 6.17 of the  Interstate  Disclosure
Schedule, neither Interstate nor any of the Interstate Subsidiaries has received
any notice of cancellation or termination with respect to any material insurance
policy  of  Interstate  or any of the  Interstate  Subsidiaries.  The  insurance
policies of Interstate  and each of the  Interstate  Subsidiaries  are valid and
enforceable policies in all material respects.

                  Section  6.18  Ownership of WPL and IES Common  Stock.  Except
pursuant to the terms of the  WPL/Interstate  and  IES/Interstate  Stock  Option
Agreements,  Interstate does not "beneficially own" (as such term is defined for
purposes of Section 13(d) of the Exchange Act) any shares of WPL Common Stock
or IES Common Stock.


                                  ARTICLE VII

                     CONDUCT OF BUSINESS PENDING THE MERGER

                  Section 7.1  Covenants of the  Parties.  After the date hereof
and prior to the Effective Time or earlier  termination of this Agreement,  WPL,
IES and  Interstate  each  agree as set forth in this  Article  VII,  each as to
itself  and to each  of the  WPL  Subsidiaries,  the  IES  Subsidiaries  and the
Interstate  Subsidiaries,  respectively,  except as  expressly  contemplated  or
permitted in this Agreement,  the Stock Option Agreements,  or to the extent the
other parties hereto shall otherwise consent in writing.

                  Section 7.2  Ordinary  Course of  Business.  Each party hereto
shall, and shall cause its Subsidiaries to, carry on their respective businesses
in the usual,  regular and ordinary course in  substantially  the same manner as
heretofore  conducted and use all  commercially  reasonable  efforts to preserve
intact their present business organizations and goodwill,  preserve the goodwill
and relationships with customers,  suppliers and others having business dealings
with them and, subject to prudent

                                      -55-

<PAGE>



management  of workforce  needs and ongoing  programs  currently in force,  keep
available the services of their present  officers and  employees.  Except as set
forth in Section 7.2 of the WPL Disclosure Schedule, the IES Disclosure Schedule
or the Interstate Disclosure Schedule,  respectively,  no party shall, nor shall
any party permit any of its  Subsidiaries to, enter into a new line of business,
or make any change in the line of  business  it engages in as of the date hereof
involving  any  material  investment  of assets  or  resources  or any  material
exposure to liability or loss,  in the case of WPL, to WPL and its  Subsidiaries
taken as a whole,  in the case of IES,  to IES and its  Subsidiaries  taken as a
whole, and in the case of Interstate,  to Interstate and its Subsidiaries  taken
as a whole.

                  Section 7.3  Dividends.  No party  shall,  nor shall any party
permit any of its Subsidiaries to,

                  (a)(i)   declare  or  pay  any  dividends  on  or  make  other
         distributions in respect of any of their capital stock other than

                           (A) to such party or its wholly-owned Subsidiaries,

                           (B)  dividends   required  to  be  paid  on  any  IES
                  Preferred Stock,  Utilities  Preferred Stock,  WP&LC Preferred
                  Stock or Interstate  Preferred  Stock in  accordance  with the
                  respective terms thereof, and

                           (C) regular  quarterly  dividends on IES Common Stock
                  and  Interstate  Common  Stock,  with usual record and payment
                  dates,  during  any fiscal  year,  which  dividends  shall not
                  exceed  100% of the prior  year in the case of IES and 100% of
                  the prior year in the case of Interstate, and

                           (D) regular quarterly  dividends on WPL Common Stock,
                  with usual record and payment  dates,  during any fiscal year,
                  which dividends shall not exceed 105% of the dividends for the
                  prior fiscal year; and

                      (ii) split,  combine or  reclassify  any of their  capital
         stock or issue or  authorize  or  propose  the  issuance  of any  other
         securities in respect of, in lieu of, or in substitution for, shares of
         their capital stock; or

                      (iii) redeem,  repurchase or otherwise  acquire any shares
         of their capital stock, other than

                           (A) redemptions,  purchases or acquisitions  required
                  by the respective  terms of any series of IES Preferred Stock,
                  Utilities   Preferred   Stock,   WP&LC  Preferred   Stock,  or
                  Interstate Preferred Stock,

                                      -56-

<PAGE>




                           (B) in  connection  with  refunding of IES  Preferred
                  Stock,  Utilities  Preferred  Stock,  WP&LC Preferred Stock or
                  Interstate  Preferred  Stock with preferred stock or debt at a
                  lower  cost of funds  (calculating  such cost on an  after-tax
                  basis),

                           (C) in  connection  with  intercompany  purchases  of
                  capital stock,

                           (D)  for  the  purpose  of  funding   employee  stock
                  ownership or dividend reinvestment and stock purchase plans in
                  accordance with past practice, or

                           (E) as set forth on  Section  7.3(a)(iii)  of the WPL
                  Disclosure  Schedule,  IES  Disclosure  Schedule or Interstate
                  Disclosure Schedule.

                  (b) Each of WPL, IES, and Interstate  shall declare a dividend
         on each share of its Common  Stock to holders of record of such  shares
         as of the close of  business on the  business  day next  preceding  the
         Effective Time in an amount equal to the product of

                      (i) a fraction,

                           (A) the  numerator of which equals the number of days
                  between  the  payment  date with  respect  to the most  recent
                  regular dividend paid by WPL, IES, or Interstate,  as the case
                  may be, and the Effective Time, and

                           (B) the denominator of which equals 91, and

                      (ii) the amount of the regular cash dividend most recently
         paid by WPL, IES or Interstate, as the case may be;

provided,  however,  that  if any one or more  of  WPL,  IES or  Interstate  has
declared  a regular  quarterly  dividend  on shares of its  Common  Stock with a
payment date (the "Payment  Date") after the Effective Time, then no dividend as
provided  for in this  Section  7.3(b) shall be declared or paid with respect to
such shares and the dividend of the other party or parties  shall be  calculated
by  substituting  "Payment Date" for  "Effective  Time" in clause (i)(A) of this
Section 7.3(b).

                  (c)  Notwithstanding the foregoing,

                      (i)  WPL  may  redeem  all or  any  portion  of the  WP&LC
         Preferred  Stock  if the  Board  of  Directors  of WPL  in  good  faith
         determines  such  course of action  will  facilitate  the  transactions
         contemplated hereby,

                      (ii)  IES  may  redeem  all or  any  portion  of  the  IES
         Preferred Stock or Utilities Preferred Stock if the IES

                                      -57-

<PAGE>



         Board of Directors in good faith  determines such course of action will
         facilitate the transactions contemplated hereby, and

                      (iii)  Interstate  may  redeem  all or any  portion of the
         Interstate  Preferred  Stock,  if the Interstate  Board of Directors in
         good  faith  determines  such  course of  action  will  facilitate  the
         transactions contemplated hereby.

                  Section 7.4 Issuance of  Securities.  (a) No party shall,  nor
shall  any party  permit  any of its  Subsidiaries  to,  issue,  agree to issue,
deliver,  sell, award, pledge,  dispose of or otherwise encumber or authorize or
propose  the  issuance,   delivery,  sale,  award,  pledge,  disposal  or  other
encumbrance of, any shares of their capital stock of any class or any securities
convertible  into or  exchangeable  for, or any  rights,  warrants or options to
acquire, any such shares or convertible or exchangeable  securities,  other than
(w) pursuant to the Stock Option  Agreements,  (x) pursuant to the Benefit Plans
relating to the WPL Subsidiaries listed in (and in amounts no greater than those
set forth in) Section 7.4 of the WPL  Disclosure  Schedule,  (y)  issuances by a
Subsidiary of a party hereto to the party that  directly or indirectly  controls
such  Subsidiary  or to a  wholly-  owned  Subsidiary  of  such  party,  and (z)
issuances:

                      (i) in the case of IES and the IES Subsidiaries

                           (A) in connection  with refunding IES Preferred Stock
                  or Utilities Preferred Stock with preferred stock or debt at a
                  lower  cost of funds  (calculating  such cost on an  after-tax
                  basis); and

                           (B) up to 450,000  shares of IES  Common  Stock to be
                  issued for general corporate purposes,  including issuances in
                  connection  with  acquisitions  and  financing  and  issuances
                  pursuant to employee  benefit  plans,  stock  option and other
                  incentive   compensation  plans,  directors  plans  and  stock
                  purchase plans;

                           (C)  issuances  of IES Common  Stock  pursuant to IES
                  dividend reinvestment plans; and

                           (D)  issuances  of  securities  pursuant  to the  IES
                  Rights Agreement.

                      (ii) in the case of WPL and the WPL Subsidiaries

                           (A) in connection  with refunding of WP&LC  Preferred
                  Stock  with  preferred  stock or debt at a lower cost of funds
                  (calculating such cost on an after-tax basis); and

                           (B) up to 1 million  shares of WPL Common Stock to be
                  issued for general corporate purposes,

                                      -58-

<PAGE>



                  including   issuances  in  connection  with  acquisitions  and
                  financing and issuances  pursuant to employee  benefit  plans,
                  stock option and other incentive compensation plans, directors
                  plans and stock purchase plans;

                           (C)  issuances  of WPL Common  Stock  pursuant to WPL
                  dividend reinvestment plans; and

                           (D)  issuances  of  securities  pursuant  to the  WPL
                  Rights Agreement.

                      (iii)  in  the  case  of  Interstate  and  the  Interstate
         Subsidiaries

                           (A)  in  connection   with  refunding  of  Interstate
                  Preferred  Stock with preferred  stock or debt at a lower cost
                  of funds (calculating such cost on an after-tax basis); and

                           (B) up to 200,000  shares of Interstate  Common Stock
                  to  be  issued  for  general  corporate  purposes,   including
                  issuances in connection  with  acquisitions  and financing and
                  issuances pursuant to employee benefit plans, stock option and
                  other incentive  compensation plans, directors plans and stock
                  purchase plans; and

                           (C) issuances of Interstate  Common Stock pursuant to
                  Interstate's dividend reinvestment plans.

                  (b) The  parties  shall  promptly  furnish  to each other such
information as may be reasonably  requested including financial  information and
take such action as may be reasonably  necessary and otherwise  fully  cooperate
with each  other in the  preparation  of any  registration  statement  under the
Securities  Act and other  documents  necessary in  connection  with issuance of
securities as contemplated by this Section 7.4,  subject to obtaining  customary
indemnities.

                  Section 7.5 Charter Documents.  Except as set forth in Section
7.5  of  the  WPL  Disclosure  Schedule,  the  IES  Disclosure  Schedule  or the
Interstate  Disclosure  Schedule,  except as contemplated herein, no party shall
amend or propose to amend its respective  articles of incorporation,  by-laws or
regulations, or similar organic documents.

                  Section  7.6 No  Acquisitions.  Except as set forth in Section
7.6  of  the  WPL  Disclosure  Schedule,  the  IES  Disclosure  Schedule  or the
Interstate  Disclosure  Schedule,  other  than  acquisitions  by a party and its
Subsidiaries not in excess of $10 million in the case of WPL, $10 million in the
case of IES and $5 million in the case of Interstate,  over the amount  budgeted
or forecasted by each party for acquisition  expenditures,  as set forth in such
Section 7.6 of the WPL Disclosure  Schedule,  the IES Disclosure Schedule or the
Interstate Disclosure Schedule,

                                      -59-

<PAGE>



singularly or in the aggregate,  no party shall,  nor shall any party permit any
of its  Subsidiaries to, acquire,  or publicly  propose to acquire,  or agree to
acquire,  by merger or  consolidation  with,  or by  purchase  or  otherwise,  a
substantial  equity  interest in or a substantial  portion of the assets of, any
business  or  any  corporation,   partnership,  association  or  other  business
organization  or  division  thereof,  nor shall any  party  acquire  or agree to
acquire a  material  amount  of  assets  other  than in the  ordinary  course of
business consistent with past practice.

                  Section  7.7 Capital  Expenditures  and  Emission  Allowances.
Except as set  forth in  Section  7.7 of the WPL  Disclosure  Schedule,  the IES
Disclosure  Schedule or the Interstate  Disclosure  Schedule,  or as required by
law, no party shall,  nor shall any party permit any of its Subsidiaries to, (i)
make  capital  expenditures  in excess of $50  million  in the case of WPL,  $80
million in the case of IES, and $16 million in the case of  Interstate  over the
amount budgeted by each such party for capital expenditures as set forth in such
Section 7.7 of the WPL Disclosure  Schedule,  the IES Disclosure Schedule or the
Interstate  Disclosure Schedule,  or (ii) enter into written commitments for the
purchase of sulfur dioxide emission  allowances as provided for by the Clean Air
Act Amendments of 1990, in excess (singularly or in the aggregate) of $1 million
in the case of WPL,  $500,000  in the case of IES,  and  $250,000 in the case of
Interstate.

                  Section  7.8 No  Dispositions.  Except as set forth in Section
7.8  of  the  WPL  Disclosure  Schedule,  the  IES  Disclosure  Schedule  or the
Interstate  Disclosure  Schedule,  other  than  dispositions  by a party and its
Subsidiaries  of  assets  having  a  fair  market  value  (singularly  or in the
aggregate)  of less than $10 million in the case of WPL, $10 million in the case
of IES, and $2 million in the case of Interstate,  no party shall, nor shall any
party permit any of its  Subsidiaries  to,  sell,  lease,  license,  encumber or
otherwise dispose of, any of its assets, other than encumbrances or dispositions
in the ordinary course of its business consistent with past practice.

                  Section  7.9  Indebtedness.  Except  as  contemplated  by this
Agreement,  no party shall,  nor shall any party permit any of its  Subsidiaries
to,  incur  or  guarantee  any  indebtedness  (including  any debt  borrowed  or
guaranteed or otherwise assumed including,  without limitation,  the issuance of
debt  securities  or warrants or rights to acquire debt) or enter into any "keep
well" or other  agreement to maintain any financial  condition of another person
or enter into any arrangement having the economic effect of any of the foregoing
other  than (i)  short-term  indebtedness  in the  ordinary  course of  business
consistent  with past practice (such as the issuance of commercial  paper or the
use of existing credit facilities);  (ii) long-term indebtedness not aggregating
more than $40 million in the case of WPL,  $60  million in the case of IES,  and
$20 million in the case of Interstate;

                                      -60-

<PAGE>



(iii)  arrangements  between  such  party  and its  Subsidiaries  or  among  its
Subsidiaries;  (iv) as set forth in Section 7.9 of the WPL Disclosure  Schedule,
the IES  Disclosure  Schedule  or the  Interstate  Disclosure  Schedule;  (v) in
connection with the refunding of existing indebtedness at a lower cost of funds;
or (vi) in  connection  with the  refunding of IES  Preferred  Stock,  Utilities
Preferred  Stock,  WP&LC  Preferred  Stock or  Interstate  Preferred  Stock,  as
permitted in Section 7.3.

                  Section 7.10  Compensation,  Benefits.  Except as set forth in
Section 7.10 of the WPL Disclosure Schedule,  the IES Disclosure Schedule or the
Interstate  Disclosure  Schedule,  as may be  required by  applicable  law or as
contemplated by this Agreement,  no party shall,  nor shall any party permit any
of its Subsidiaries to

                  (a)  enter  into,  adopt or amend or  increase  the  amount or
accelerate the payment or vesting of any benefit or amount  payable  under,  any
employee  benefit plan or other contract,  agreement,  commitment,  arrangement,
plan or policy  maintained  by,  contributed to or entered into by such party or
any of its  Subsidiaries,  or increase,  or enter into any contract,  agreement,
commitment or arrangement to increase in any manner,  the compensation or fringe
benefits, or otherwise to extend,  expand or enhance the engagement,  employment
or any related rights, of any director,  officer or other employee of such party
or any of its  Subsidiaries,  except for normal increases in the ordinary course
of business consistent with past practice that, in the aggregate,  do not result
in a material increase in benefits or compensation  expense to such party or any
of its Subsidiaries, or

                 (b) enter into or amend any  employment,  severance  or special
pay arrangement  with respect to the  termination  of  employment  or other 
similar contract,  agreement  or  arrangement  with any  director  or  officer 
or other employee,  except as set forth in Section 7.10 of the WPL  Disclosure 
Schedule, the IES Disclosure  Schedule or the Interstate  Disclosure Schedule or
otherwise in the ordinary course of business consistent with past practice.

                  Section 7.11 1935 Act.  Except as set forth in Section 7.11 of
the WPL  Disclosure  Schedule,  the IES  Disclosure  Schedule or the  Interstate
Disclosure  Schedule,  no party  shall,  nor shall any party  permit  any of its
Subsidiaries to, except as required or contemplated by this Agreement, engage in
any  activities  which  would  cause  a  change  in its  status,  or that of its
Subsidiaries,  under the 1935 Act,  or that would  impair the  ability of WPL to
claim an exemption  pursuant to its order under Section  3(a)(1) of the 1935 Act
or that would  impair the ability of IES to claim an  exemption  pursuant to its
order under Section 3(a)(1) of the 1935 Act prior to the Effective  Time,  other
than (i) the  application  to the SEC  under the 1935 Act  contemplated  by this
Agreement for approval to the extent

                                      -61-

<PAGE>



required of the  transactions  contemplated  hereby and (ii) the registration of
the Company pursuant to the 1935 Act.

                  Section  7.12  Transmission,  Generation.  Except as  required
pursuant to tariffs on file with the FERC as of the date hereof, in the ordinary
course of business  consistent  with past  practice,  or as set forth in Section
7.12  of the  WPL  Disclosure  Schedule,  the  IES  Disclosure  Schedule  or the
Interstate  Disclosure Schedule,  no party shall, nor shall any party permit any
of its Subsidiaries to, (i) commence construction of any additional  generating,
transmission  or  delivery  capacity,  or (ii)  obligate  itself to  purchase or
otherwise  acquire,  or to  sell or  otherwise  dispose  of,  or to  share,  any
additional generating,  transmission or delivery capacity in an amount in excess
of $30  million  in the case of WPL,  $80  million  in the case of IES,  and $16
million  in the  case of  Interstate,  except  as set  forth in the  budgets  or
forecasts  of WPL dated  November  10,  1995,  IES dated  October  16,  1995 and
Interstate  dated  February 27, 1995,  respectively,  which budgets or forecasts
have been shared with each other party hereto .

                  Section 7.13  Accounting.  Except as set forth in Section 7.13
of the WPL Disclosure  Schedule,  the IES Disclosure  Schedule or the Interstate
Disclosure  Schedule,  no party  shall,  nor shall any party  permit  any of its
Subsidiaries  to,  make any  changes  in their  accounting  methods,  except  as
required by law, rule, regulation or GAAP.

                  Section  7.14  Pooling.  No party  shall,  nor shall any party
permit any of its Subsidiaries or, within the exercise of its best efforts,  its
Joint  Ventures to, take any action which would,  or would be reasonably  likely
to,  prevent the Company from  accounting  for the  transactions  to be effected
pursuant to this Agreement as a pooling of interests in accordance with GAAP and
applicable  SEC  regulations,  and each party  hereto  shall use all  reasonable
efforts  to  achieve  such  result  (including  taking  such  actions  as may be
necessary  to  cure  any  facts  or   circumstances   that  could  prevent  such
transactions from qualifying for pooling-of-interests accounting treatment).

                  Section 7.15 Tax-free  Status.  No party shall,  nor shall any
party  permit  any of its  Subsidiaries  or,  within  the  exercise  of its best
efforts,  its Joint  Ventures  to, take any  actions  which  would,  or would be
reasonably  likely to,  adversely  affect the status of the Merger as a tax-free
transaction  (except as to  dissenters'  rights  and  fractional  shares)  under
Section  368(a) of the Code,  and each  party  hereto  shall use all  reasonable
efforts to achieve such result.

                  Section 7.16  Affiliate  Transactions.  Except as set forth in
Section 7.16 of the WPL Disclosure Schedule,  the IES Disclosure Schedule or the
Interstate  Disclosure Schedule,  no party shall, nor shall any party permit any
of its  Subsidiaries  or,  within the  exercise of its best  efforts,  its Joint
Ventures

                                      -62-

<PAGE>



to,  enter  into  any  material  agreement  or  arrangement  with  any of  their
respective Affiliates (other than wholly-owned Subsidiaries) on terms materially
less  favorable  to such party than could  reasonably  be  expected to have been
obtained with an unaffiliated third party on an arm's-length basis.

                  Section 7.17 Cooperation,  Notification. Each party shall, and
shall cause its  Subsidiaries and shall use its best efforts to cause, its Joint
Ventures to

                  (a)  cause  its  appropriate  representatives  to  confer on a
regular and frequent basis with one or more  representatives of each other party
to discuss,  subject to applicable  law,  material  operational  matters and the
general status of its ongoing operations;

                  (b)  promptly  notify  each  other  party  of any  significant
changes in its business,  properties,  assets,  condition  (financial or other),
results of operations or prospects;

                  (c) advise  each other party of any change or event which has,
had or,  insofar as reasonably can be foreseen,  is reasonably  likely to result
in, in the case of WPL, a WPL Material  Adverse  Effect,  in the case of IES, an
IES  Material  Adverse  Effect,  or in the  case of  Interstate,  an  Interstate
Material Adverse Effect; and

                  (d)  promptly  provide  each other  party  with  copies of all
filings made by such party or any of its Subsidiaries  with any state or Federal
court,  administrative  agency,  commission or other  Governmental  Authority in
connection with this Agreement and the transactions contemplated hereby.

                  Section 7.18 Third-party Consents.

                  (a) WPL shall,  and shall cause its  Subsidiaries  to, use all
commercially  reasonable efforts to obtain all WPL Required Consents.  WPL shall
promptly  notify IES and  Interstate  of any failure or  prospective  failure to
obtain any such consents and, if requested by IES or  Interstate,  shall provide
copies of all WPL Required Consents obtained by WPL to IES and Interstate.

                  (b) IES shall,  and shall cause its  Subsidiaries  to, use all
commercially  reasonable efforts to obtain all IES Required Consents.  IES shall
promptly  notify WPL and  Interstate  of any failure or  prospective  failure to
obtain any such consents and, if requested by WPL or  Interstate,  shall provide
copies of all IES Required Consents obtained by IES to WPL and Interstate.

                  (c) Interstate shall, and shall cause its Subsidiaries to, use
all commercially  reasonable efforts to obtain all Interstate Required Consents.
Interstate shall promptly notify

                                      -63-

<PAGE>



WPL and IES of any failure or  prospective  failure to obtain any such  consents
and, if requested by WPL or IES, shall provide copies of all Interstate Required
Consents obtained by Interstate to WPL and IES.

                  Section 7.19 No Breach.  No party  shall,  nor shall any party
permit any of its  Subsidiaries  to,  willfully take any action that would or is
reasonably likely to result

                  (a) in a material breach of any provision of this Agreement or
the Stock Option Agreements, or

                  (b) in any of its  representations and warranties set forth in
this  Agreement  or the Stock  Option  Agreements  being untrue on and as of the
Closing Date.

                  Section 7.20 Tax-exempt  Status. No party shall, nor shall any
party permit any  Subsidiary to take any action that would be reasonably  likely
to  jeopardize  the  qualification  of  WP&LC's,   Utilities's  or  Interstate's
outstanding  revenue bonds which qualify on the date hereof under Section 142(a)
of the Code as "exempt facility bonds" or as tax-exempt  industrial  development
bonds under Section  103(b)(4) of the Internal Revenue Code of 1954, as amended,
prior to the enactment of the Tax Reform Act of 1986.

                  Section 7.21 Transition  Steering Team. As soon as practicable
after the date hereof,  the parties shall create a special  transition  steering
team (the "Transition  Team")  reporting to Erroll B. Davis,  Jr. ("Mr.  Davis")
which shall be chaired by Wayne H. Stoppelmoor ("Mr. Stoppelmoor") and include a
designee of each of IES, WPL and  Interstate.  The Transition Team shall develop
recommendations  concerning  the future  structure and operations of the Company
after the Effective Time, subject to applicable law.

                  Section 7.22 Company Actions.  IES, WPL and Interstate  shall,
and shall cause their  respective  Subsidiaries and shall use their best efforts
to cause their respective  Joint Ventures to, take only those actions,  from the
date  hereof  until  the  Effective  Time,  that  are  required,   permitted  or
contemplated  by this Agreement to be taken by any of them,  including,  without
limitation,  the  declaration,  filing  or  registration  with,  or notice to or
authorization,  consent or approval of, any Governmental Authority, as set forth
in Section 7.22 of the WPL Disclosure Schedule,  the IES Disclosure Schedule and
the Interstate Disclosure Schedule, respectively.

                  Section 7.23 Tax Matters.  Except as set forth in Section 7.23
of the WPL Disclosure  Schedule,  the IES Disclosure  Schedule or the Interstate
Disclosure  Schedule,  no party  shall make or rescind any  material  express or
deemed  election  relating to taxes,  settle or compromise  any material  claim,
action, suit, litigation, proceeding, arbitration, investigation, audit or

                                      -64-

<PAGE>



controversy  relating to taxes, or change any of its methods of reporting income
or  deductions  for  Federal  income tax  purposes  from those  employed  in the
preparation  of its  Federal  income  tax  return for the  taxable  year  ending
December 31, 1994, except as may be required by applicable law.

                  Section 7.24  Discharge of  Liabilities.  No party shall,  nor
shall any party  permit its  Subsidiaries  to,  pay,  discharge  or satisfy  any
material  claims,  liabilities or obligations  (absolute,  accrued,  asserted or
unasserted,  contingent  or  otherwise),  other than the  payment,  discharge or
satisfaction,  in the ordinary course of business  consistent with past practice
(which  includes  the  payment  of  final  and  unappealable  judgments)  or  in
accordance with their terms, of liabilities reflected or reserved against in, or
contemplated by, the most recent consolidated financial statements (or the notes
thereto) of such party  included in such party's  reports filed with the SEC, or
incurred in the ordinary course of business consistent with past practice.

                  Section 7.25  Contracts.  No party shall,  nor shall any party
permit its Subsidiaries  or, within the exercise of its best efforts,  its Joint
Ventures to,  except in the  ordinary  course of business  consistent  with past
practice,  modify,  amend,  terminate,  renew or fail to use reasonable business
efforts to renew any  material  contract or agreement to which such party or any
Subsidiary  of such party is a party or waive,  release  or assign any  material
rights or claims.

                  Section 7.26 Insurance.  Each party shall, and shall cause its
Subsidiaries  to,  maintain with  financially  responsible  insurance  companies
insurance  coverage in such  amounts  and  against  such risks and losses as are
customary  for  companies  engaged in the electric and gas utility  industry and
employing methods of generating electric power and fuel sources similar to those
methods employed and fuels used by such party or its Subsidiaries.

                  Section 7.27  Permits.  Each party shall,  and shall cause its
Subsidiaries  to, use  reasonable  efforts to  maintain  in effect all  existing
Permits pursuant to which such party or its Subsidiaries operate.


                                  ARTICLE VIII

                             ADDITIONAL AGREEMENTS

                  Section 8.1  Access to Information.

                  (a) Upon reasonable notice,  each party shall, and shall cause
its  Subsidiaries  and, shall use its best efforts to cause,  its Joint Ventures
to,  afford  to  the  officers,  directors,  employees,   accountants,  counsel,
investment bankers, financial

                                      -65-

<PAGE>



advisors  and  other   representatives  of  the  other  parties   (collectively,
"Representatives")  reasonable  access,  during normal business hours throughout
the  period  prior  to the  Effective  Time,  to all of its  properties,  books,
contracts,  commitments and records (including, but not limited to, Tax Returns)
and, during such period,  each party shall, and shall cause its Subsidiaries to,
furnish promptly to the other parties

                      (i) access to each  report,  schedule  and other  document
         filed or  received  by it or any of its  Subsidiaries  and,  within the
         exercise  of its best  efforts,  its  Joint  Ventures  pursuant  to the
         requirements of Federal or state  securities laws or filed with or sent
         to the SEC, the FERC, the NRC, the DOE, the Department of Justice,  the
         Federal Trade Commission,  the Iowa Utilities Board, the Public Service
         Commission  of  Wisconsin,   the  Illinois  Commerce  Commission,   the
         Minnesota  Public  Utilities  Commission  or any other Federal or state
         regulatory agency or commission, and

                      (ii)  access to all  information  concerning  itself,  its
         Subsidiaries  and,  within the exercise of its best efforts,  its Joint
         Ventures,  directors,  officers and shareholders and such other matters
         as may be reasonably  requested by any other party in  connection  with
         any filings, applications or approvals required or contemplated by this
         Agreement  or  for  any  other  reason  related  to  the   transactions
         contemplated by this Agreement.

                  (b) Each party  shall,  and shall cause its  Subsidiaries  and
Representatives,  and shall use its best efforts to cause its Joint Ventures to,
hold in strict  confidence all documents and  information  concerning the others
furnished  to it in  connection  with  the  transactions  contemplated  by  this
Agreement in accordance with the Confidentiality  Agreement, dated September 19,
1995, among WPL, IES and Interstate, as it may be amended from time to time (the
"Confidentiality Agreement").

                  Section 8.2 Joint Proxy Statement and Registration Statement.

                  (a) Preparation and Filing.  The parties will prepare and file
with  the SEC as soon as  reasonably  practicable  after  the  date  hereof  the
Registration   Statement  and  the  Proxy   Statement   (together,   the  "Joint
Proxy/Registration  Statement").  The parties  hereto shall each use  reasonable
efforts to cause the Registration  Statement to be declared  effective under the
Securities Act as promptly as practicable  after such filing.  Each party hereto
shall also take such action as may reasonably be required to cause the shares of
WPL Common Stock issuable in connection  with the Merger to be registered (or to
obtain an exemption  from  registration)  under  applicable  state "blue sky" or
securities laws; provided,  however, that no party shall be required to register
or qualify as a foreign  corporation or to take other action which would subject
it to service of process in

                                      -66-

<PAGE>



any jurisdiction where it will not be, following the Merger, so subject. Each of
the parties  hereto shall  furnish all  information  concerning  itself which is
required or customary for inclusion in the Joint  Proxy/Registration  Statement.
The parties shall use reasonable efforts to cause the shares of WPL Common Stock
issuable in the Merger to be approved  for listing on the NYSE  subject  only to
official notice of issuance.  The  information  provided by any party hereto for
use in the Joint  Proxy/Registration  Statement shall be true and correct in all
material  respects  without  omission of any material  fact which is required to
make such information not false or misleading.  No  representation,  covenant or
agreement is made by any party hereto with  respect to  information  supplied by
any other party for inclusion in the Joint Proxy/Registration Statement.

                  (b) Letter of WPL's Accountants. WPL shall use best efforts to
cause to be delivered to IES and  Interstate  a letter of Arthur  Andersen  LLP,
dated  a  date  within  two   business   days  before  the  date  of  the  Joint
Proxy/Registration  Statement, and addressed to IES and Interstate,  in form and
substance reasonably satisfactory to IES and Interstate,  and customary in scope
and  substance  for "cold  comfort"  letters  delivered  by  independent  public
accountants in connection with registration statements on Form S-4.

                  (c) Letter of IES's Accountants. IES shall use best efforts to
cause to be delivered to WPL and  Interstate  a letter of Arthur  Andersen  LLP,
dated  a  date  within  two   business   days  before  the  date  of  the  Joint
Proxy/Registration  Statement, and addressed to WPL and Interstate,  in form and
substance  reasonably  satisfactory to WPL and Interstate and customary in scope
and  substance  for "cold  comfort"  letters  delivered  by  independent  public
accountants in connection with registration statements on Form S-4.

                  (d) Letter of Interstate's  Accountants.  Interstate shall use
best  efforts  to cause to be  delivered  to WPL and IES a letter of  Deloitte &
Touche LLP,  dated a date within two business  days before the date of the Joint
Proxy/Registration  Statement,  and  addressed  to WPL  and  IES,  in  form  and
substance  reasonably  satisfactory  to WPL and IES and  customary  in scope and
substance for "cold comfort" letters delivered by independent public accountants
in connection with registration statements on Form S-4.

                  (e) Fairness Opinions.  It shall be a condition to the mailing
of the Joint  Proxy/Registration  Statement to the  shareholders of WPL, IES and
Interstate that

                      (i) WPL shall have received an opinion from Merrill, dated
         the date of the Joint Proxy/Registration Statement, to the effect that,
         as of the date thereof, the IES Ratio and the Interstate Ratio are fair
         to WPL from a financial point of view,

                                      -67-

<PAGE>




                      (ii) IES shall have received an opinion from Morgan, dated
         the date of the Joint Proxy/Registration Statement, to the effect that,
         as of the  date  thereof,  the  IES  Ratio,  taking  into  account  the
         Interstate Ratio, is fair from a financial point of view to the holders
         of IES Common Stock, and

                      (iii)  Interstate  shall have  received  an  opinion  from
         Salomon, dated the date of the Joint  Proxy/Registration  Statement, to
         the  effect  that,  as of the date  thereof,  the  consideration  to be
         received by the holders of  Interstate  Common Stock in the  Interstate
         Merger  is fair  from a  financial  point  of view  to the  holders  of
         Interstate Common Stock.

                  Section 8.3  Regulatory Matters.

                  (a) HSR  Filings.  Each party hereto shall file or cause to be
filed with the  Federal  Trade  Commission  and the  Department  of Justice  any
notifications required to be filed by itself or its respective "ultimate parent"
company  under the  Hart-Scott-Rodino  Antitrust  Improvements  Act of 1976,  as
amended (the "HSR Act"),  and the rules and regulations  promulgated  thereunder
with respect to the transactions  contemplated hereby. Such parties will use all
commercially  reasonable  efforts to make such filings within 200 days after the
date hereof, and to respond promptly to any requests for additional  information
made by either of such agencies.

                  (b)  Other  Regulatory  Approvals.  Each  party  hereto  shall
cooperate  and use its best efforts to promptly  prepare and file all  necessary
documentation, to effect all necessary applications, notices, petitions, filings
and other documents,  and to use all commercially  reasonable  efforts to obtain
all  necessary   permits,   consents,   approvals  and   authorizations  of  all
Governmental  Authorities  necessary  or  advisable  to  consummate  the Merger,
including,  without limitation,  the WPL Required Statutory  Approvals,  the IES
Required Statutory Approvals and the Interstate Required Statutory Approvals.

                  Section 8.4  Shareholder Approval.

                  (a) Approval of IES Shareholders. Subject to the provisions of
Section 8.4(d) and Section 8.4(e), IES shall, as soon as reasonably  practicable
after the date hereof

                      (i) take all steps necessary to duly call, give notice of,
         convene  and hold a  special  meeting  of its  shareholders  (the  "IES
         Special  Meeting")  for the purpose of securing  the IES  Shareholders'
         Approval,

                      (ii) distribute to its shareholders the Proxy Statement in
         accordance with applicable Federal and state

                                      -68-

<PAGE>



         law and with its Restated Articles of Incorporation and By-laws,

                      (iii)  subject  to the  fiduciary  duties  of its Board of
         Directors,  recommend  to its  shareholders  the  approval  of the  IES
         Merger, this Agreement and the transactions contemplated hereby, and

                      (iv)  cooperate and consult with WPL and  Interstate  with
         respect to each of the foregoing matters.

                  (b) Approval of WPL Shareholders. Subject to the provisions of
Section 8.4(d) and Section 8.4(e), WPL shall, as soon as reasonably  practicable
after the date hereof

                      (i) take all steps necessary to duly call, give notice of,
         convene  and hold a  special  meeting  of its  shareholders  (the  "WPL
         Special  Meeting")  for the purpose of securing  the WPL  Shareholders'
         Approval,

                      (ii) distribute to its shareholders the Proxy Statement in
         accordance with applicable  Federal and state law and with its Restated
         Articles of Incorporation and By-laws,

                      (iii)  subject  to the  fiduciary  duties  of its Board of
         Directors,  recommend to its  shareholders  the approval of the Merger,
         this Agreement and the transactions contemplated hereby, and

                      (iv)  cooperate and consult with IES and  Interstate  with
         respect to each of the foregoing matters.

                  (c)  Approval  of  Interstate  Shareholders.  Subject  to  the
provisions of Section 8.4(d) and Section  8.4(e),  Interstate  shall, as soon as
reasonably practicable after the date hereof

                      (i) take all steps necessary to duly call, give notice of,
         convene and hold a special meeting of its shareholders (the "Interstate
         Special   Meeting")   for  the  purpose  of  securing  the   Interstate
         Shareholders' Approval,

                      (ii) distribute to its shareholders the Proxy Statement in
         accordance with applicable  Federal and state law and with its Restated
         Certificate of Incorporation and By-laws,

                      (iii)  subject  to the  fiduciary  duties  of its Board of
         Directors, recommend to its shareholders the approval of the Interstate
         Merger, this Agreement and the transactions contemplated hereby, and

                      (iv)  cooperate  and consult with IES and WPL with respect
         to each of the foregoing matters.

                                      -69-

<PAGE>




                  (d) Meeting  Date.  The IES Special  Meeting,  the WPL Special
Meeting and the Interstate  Special  Meeting shall be held on such dates as WPL,
IES and Interstate shall mutually determine.

                  (e) Fairness  Opinions Not Withdrawn.  It shall be a condition
to the  obligation  of WPL to hold the WPL Special  Meeting  that the opinion of
Merrill,  referred to in Section 8.2(e), shall not have been withdrawn, it shall
be a condition to the obligation of IES to hold the IES Special Meeting that the
opinion of Morgan, referred to in Section 8.2(e), shall not have been withdrawn,
and it  shall  be a  condition  to the  obligation  of  Interstate  to hold  the
Interstate  Special Meeting that the opinion of Salomon,  referred to in Section
8.2(e), shall not have been withdrawn.

                  Section 8.5  Director and Officer Indemnification.

                  (a) Indemnification. To the extent, if any, not provided by an
existing right of indemnification  or other agreement or policy,  from and after
the  Effective  Time,  the Company  shall,  to the fullest  extent  permitted by
applicable law,  indemnify,  defend and hold harmless each person who is now, or
has been at any  time  prior to the date  hereof,  or who  becomes  prior to the
Effective Time, an officer, director or employee of any of the parties hereto or
any Subsidiary (each an "Indemnified  Party" and collectively,  the "Indemnified
Parties") against

                      (i) all losses,  expenses (including reasonable attorney's
         fees and expenses),  claims,  damages or liabilities or, subject to the
         proviso of the next  succeeding  sentence,  amounts paid in settlement,
         arising  out of  actions  or  omissions  occurring  at or  prior to the
         Effective  Time (and whether  asserted or claimed prior to, at or after
         the Effective Time) that are, in whole or in part,  based on or arising
         out of the fact  that  such  person is or was a  director,  officer  or
         employee of such party (the "Indemnified Liabilities"), and

                      (ii) all  Indemnified  Liabilities to the extent that they
         are  based  on  or  arise  out  of  or  pertain  to  the   transactions
         contemplated by this Agreement.

In the event of any such loss,  expense,  claim, damage or liability (whether or
not arising before the Effective Time),

                           (A) the  Company  shall pay the  reasonable  fees and
                  expenses of counsel selected by the Indemnified Parties, which
                  counsel  shall  be  reasonably  satisfactory  to the  Company,
                  promptly after statements  therefor are received and otherwise
                  advance to such Indemnified  Party upon request  reimbursement
                  of documented expenses reasonably incurred,


                                      -70-

<PAGE>



                           (B) the Company will  cooperate in the defense of any
                  such matter, and

                           (C)  any  determination  required  to  be  made  with
                  respect to whether an  Indemnified  Party's  conduct  complies
                  with the standards set forth under Sections  180.0850  through
                  180.0859   of  the  WBCL   and  the   Restated   Articles   of
                  Incorporation  or By-laws of the Company (as the same shall be
                  amended  from  time to  time)  shall  be  made by  independent
                  counsel mutually acceptable to the Company and the Indemnified
                  Party; provided, however, that the Company shall not be liable
                  for any settlement effected without its written consent (which
                  consent shall not be unreasonably withheld).

                  The  Indemnified  Parties as a group may  retain  only one law
firm with respect to each related  matter except to the extent that there is, in
the opinion of counsel to an Indemnified  Party,  under applicable  standards of
professional  conduct,  a conflict on any significant issue between positions of
such Indemnified Party and any other Indemnified Party or Indemnified Parties.

                  (b)  Insurance.  For a period of six years after the Effective
Time, the Company shall cause to be maintained in effect  policies of directors'
and officers' liability insurance  maintained by WPL, IES and Interstate for the
benefit of those persons who are currently  covered by such policies on terms no
less  favorable  than the terms of such current  insurance  coverage;  provided,
however,  that the Company shall not be required to expend in any year an amount
in excess of 150% of the annual  aggregate  premiums  currently paid by WPL, IES
and Interstate for such  insurance;  and provided,  further,  that if the annual
premiums of such  insurance  coverage  exceed such amount,  the Company shall be
obligated to obtain a policy with the best coverage available, in the reasonable
judgment of the Board of Directors of the Company, for a cost not exceeding such
amount.

                  (c)  Successors.  In  the  event  the  Company  or  any of its
successors or assigns (i) consolidates  with or merges into any other person and
shall  not  be the  continuing  or  surviving  corporation  or  entity  of  such
consolidation  or merger,  or (ii)  transfers  all or  substantially  all of its
properties  and  assets to any  person,  then and in either  such  case,  proper
provisions shall be made so that the successors and assigns of the Company shall
assume the obligations set forth in this Section 8.5.

                  (d)  Survival  of  Indemnification.   To  the  fullest  extent
permitted  by  law,   from  and  after  the  Effective   Time,   all  rights  to
indemnification  as of the  date  hereof  in  favor  of the  employees,  agents,
directors  and  officers  of  WPL,  IES  and  Interstate  and  their  respective
Subsidiaries  with respect to their  activities  as such prior to the  Effective
Time, as provided in their respective articles of incorporation and by-laws in

                                      -71-

<PAGE>



effect on the date  thereof,  or otherwise  in effect on the date hereof,  shall
survive  the Merger and shall  continue in full force and effect for a period of
not less than six years from the Effective Time.

                  (e) Benefit.  The  provisions of this Section 8.5 are intended
to be for the benefit of, and shall be enforceable by, each  Indemnified  Party,
his or her heirs and his or her representatives.

                  Section 8.6  Disclosure Schedules.  On the date hereof,

                  (a) IES has delivered to WPL and  Interstate an IES Disclosure
Schedule,  accompanied by a certificate signed by the chief financial officer of
IES stating the IES  Disclosure  Schedule  is being  delivered  pursuant to this
Section 8.6(a),

                  (b) WPL has delivered to IES and  Interstate a WPL  Disclosure
Schedule,  accompanied by a certificate signed by the Vice President,  Corporate
Secretary  and  Treasurer  of WPL stating the WPL  Disclosure  Schedule is being
delivered pursuant to this Section 8.6(b), and

                  (c)  Interstate  has  delivered  to WPL and IES an  Interstate
Disclosure  Schedule,  accompanied  by a  certificate  signed  by the  principal
financial officer of Interstate  stating the Interstate  Disclosure  Schedule is
being delivered pursuant to this Section 8.6(c).

                  (d) The WPL Disclosure  Schedule,  the IES Disclosure Schedule
and the Interstate  Disclosure  Schedule are collectively  referred to herein as
the "Disclosure Schedules."

                  (e) The  Disclosure  Schedules  constitute an integral part of
this Agreement and modify the respective representations,  warranties, covenants
or agreements  of the parties  hereto  contained  herein to the extent that such
representations,  warranties,  covenants or  agreements  expressly  refer to the
Disclosure  Schedules.  Anything  to the  contrary  contained  herein  or in the
Disclosure Schedules notwithstanding,  any and all statements,  representations,
warranties or disclosures set forth in the Disclosure  Schedules shall be deemed
to have been made on and as of the date hereof.

                  Section  8.7 Public  Announcements.  Subject  to each  party's
disclosure  obligations  imposed by law, WPL, IES and Interstate  will cooperate
with each other in the  development  and  distribution  of all news releases and
other public  information  disclosures  with respect to this Agreement or any of
the transactions contemplated hereby and shall not issue any public announcement
or  statement  with respect  hereto or thereto  without the consent of the other
parties (which consent shall not be unreasonably withheld).


                                      -72-

<PAGE>



                  Section  8.8 Rule 145  Affiliates.  Within 30 days  before the
Closing Date,  WPL shall identify in a letter to IES and  Interstate,  IES shall
identify in a letter to WPL and Interstate,  and Interstate  shall identify in a
letter to WPL and IES, all persons who are, and to such  person's  knowledge who
will  be  at  the  Closing  Date,  "affiliates"  of  WPL,  IES  and  Interstate,
respectively,  as such  term is used in Rule 145 under  the  Securities  Act (or
otherwise   under   applicable   SEC   accounting   releases   with  respect  to
pooling-of-interests  accounting  treatment).  Each of WPL,  IES and  Interstate
shall use all reasonable efforts to cause their respective affiliates (including
any person who may be deemed to have become an  affiliate  after the date of the
letter  referred to in the prior sentence) to deliver to the Company on or prior
to the Closing Date a written  agreement  substantially  in the form attached as
Exhibit 8.8(a) with respect to affiliates of WPL and Exhibit 8.8(b) with respect
to affiliates of IES and Interstate (each, an "Affiliate Agreement").

                  Section 8.9  Employee Agreements and Workforce Matters.

                  (a)  Certain  Employee  Agreements.  Subject to Section  8.10,
Section 8.14 and Section  8.15,  the Company and its  Subsidiaries  shall honor,
without   modification,   all  contracts,   agreements,   collective  bargaining
agreements  and  commitments of the parties prior to the date hereof which apply
to any current or former  employee or current or former  director of the parties
hereto; provided,  however, that this undertaking is not intended to prevent the
Company  from  enforcing  such  contracts,  agreements,   collective  bargaining
agreements and  commitments in accordance with their terms,  including,  without
limitation,  any reserved right to amend, modify,  suspend,  revoke or terminate
any such contract, agreement, collective bargaining agreement or commitment.

                  (b)      Workforce Matters.

                      (i)   Subject   to   applicable    collective   bargaining
         agreements,  for a period of three years  following the Effective Time,
         any  reductions  in  workforce  in respect to  employees of the Company
         (except as provided in subparagraph (ii) below) shall be made on a fair
         and equitable basis, in light of the  circumstances  and the objectives
         to be achieved,  giving  consideration  to previous work  history,  job
         experience and qualifications, without regard to whether employment was
         with WPL or its Subsidiaries, IES or its Subsidiaries, or Interstate or
         its  Subsidiaries,  and any employees whose employment is terminated or
         jobs are  eliminated by the Company or any of its  Subsidiaries  during
         such period shall be entitled to  participate  on a fair and  equitable
         basis in the job opportunity and employment  placement programs offered
         by the Company or any of its  Subsidiaries.  Any  workforce  reductions
         carried out following the Effective Time by the Company and its

                                      -73-

<PAGE>



         Subsidiaries shall be done in accordance with all applicable collective
         bargaining  agreements,  and all laws  and  regulations  governing  the
         employment  relationship  and termination  thereof  including,  without
         limitation,  the Worker Adjustment and Retraining  Notification Act and
         regulations promulgated  thereunder,  and any comparable state or local
         law.

                      (ii)  During  the  three-year  period  ending on the third
         anniversary of the Closing Date, the overall  employment  levels of the
         Company in the greater Dubuque area as measured  against such levels as
         of the Closing Date will not fall (for any reason whatsoever, including
         attrition of all types) below the following levels,

                           (A) prior to the  first  anniversary  of the  Closing
                  Date, 90%,

                           (B) prior to the second  anniversary  of the  Closing
                  Date, 75%, and

                           (C) prior to the  third  anniversary  of the  Closing
                  Date, 60%.

                  Section 8.10 Employee Benefit Plans.  Subject to Section 7.10,
each of the WPL Benefit Plans, the IES Benefit Plans and the Interstate  Benefit
Plans in effect at the date hereof shall be maintained in effect with respect to
the employees or former  employees of WPL and any of its  Subsidiaries,  IES and
any  of  its   Subsidiaries,   and  Interstate  and  any  of  its  Subsidiaries,
respectively,  who are covered by any such Benefit Plan immediately prior to the
Closing Date (the "Affiliated Employees") until the Company otherwise determines
after the Effective Time; provided, however, that nothing herein contained shall
limit any reserved  right  contained in any such WPL Benefit  Plan,  IES Benefit
Plan or Interstate Benefit Plan, to amend, modify,  suspend, revoke or terminate
any such plan; provided,  further, however, that the Company or its Subsidiaries
shall provide to the Affiliated Employees for a period of not less than one year
following the Effective Time benefits, other than with respect to plans referred
to in Section  8.11,  which are no less  favorable in the  aggregate  than those
provided  under the WPL Benefit  Plans,  the IES Benefit Plans or the Interstate
Benefit  Plans,  as the case may be. Without  limitation of the foregoing,  each
participant of any such WPL Benefit Plan, IES Benefit Plan or Interstate Benefit
Plan shall receive credit for purposes of eligibility to  participate,  vesting,
benefit accrual and eligibility to receive  benefits under a benefit plan of the
Company or any of its  Subsidiaries  or Affiliates for service  credited for the
corresponding  purpose under such benefit  plan;  provided,  however,  that such
crediting  of service  shall not  operate to  duplicate  any benefit to any such
participant or the funding for any such benefit. Any person hired by the Company
or any of its Subsidiaries after the Closing Date who was not

                                      -74-

<PAGE>



employed  by any  party  hereto  or its  Subsidiaries  immediately  prior to the
Closing Date shall be eligible to participate in such benefit plans  maintained,
or contributed  to, by the Company or the  Subsidiary,  division or operation by
which such person is employed,  provided that such person meets the  eligibility
requirements of the applicable plan.

                  Section 8.11  Stock Option and Other Stock Plans.

                  (a)  Amendment  of Stock  Plans and  Agreements.  Prior to the
Effective Time, IES shall amend its Stock Plan (as hereinafter defined) and each
underlying  award  agreement  to  provide  that (i) each  outstanding  option to
purchase  shares of IES  Common  Stock (a "IES  Stock  Option"),  along with any
tandem stock appreciation right, shall constitute an option to acquire shares of
WPL Common Stock, on the same terms and conditions as were applicable under such
IES Stock Option,  based on the same number of shares of WPL Common Stock as the
holder of such IES Stock Option would have been entitled to receive  pursuant to
the Merger in accordance  with Article II had such holder  exercised such option
in full immediately  prior to the Effective Time;  provided,  however,  that the
number of shares,  the option price, and the terms and conditions of exercise of
such  option,  shall be  determined  in a  manner  that  preserves  both (A) the
aggregate  gain  (or  loss) on the IES  Stock  Option  immediately  prior to the
Effective  Time and (B) the  ratio of the  exercise  price  per share of the IES
Stock to the fair market value (determined  immediately prior to Effective Time)
per share subject to such option; and provided, further, that in the case of any
option to which  Section 421 of the Code applies by reason of its  qualification
under any of  Sections  422-424  of the Code,  the option  price,  the number of
shares  purchasable  pursuant  to such  option and the terms and  conditions  of
exercise  of such option  shall be  determined  in order to comply with  Section
424(a) of the Code;  and (ii) each other  outstanding  award under the IES Stock
Plan (the "IES Stock  Awards")  shall  constitute  an award  based upon the same
number of shares of WPL Common Stock as the holder of such IES Stock Award would
have been entitled to receive  pursuant to the Merger in accordance with Article
II had such holder been the absolute  owner,  immediately  before the  Effective
Time,  of the shares of IES Common Stock on which such IES Stock Award is based,
and  otherwise  on the same terms and  conditions  as governed by such IES Stock
Award immediately  before the Effective Time. At the Effective Time, the Company
shall  assume each stock  award  agreement  relating  to the IES Stock Plan,  as
amended as previously provided. As soon as practicable after the Effective Time,
the  Company  shall  deliver to the  holders of IES Stock  Options and IES Stock
Awards  appropriate  notices  setting forth such holders' rights with respect to
such options and awards after the Effective Time and each underlying stock award
agreement, each as assumed by the Company.

                  (b) Company Action.  After the Effective Time, with respect to
the IES Stock Plan, and any other plans under which

                                      -75-

<PAGE>



the delivery of WPL Common Stock is required upon payment of benefits,  grant of
awards or exercise of options (the "Stock  Plans"),  the Company  shall take all
corporate action necessary or appropriate to

                      (i) obtain shareholder approval with respect to such Stock
         Plan to the extent such  approval is required  for purposes of the Code
         or other  applicable  law,  or to enable such Stock Plan to comply with
         Rule 16b-3 promulgated under the Exchange Act,

                      (ii)  reserve for  issuance  under such plan or  otherwise
         provide a sufficient  number of shares of WPL Common Stock for delivery
         upon payment of benefits,  grant of awards or exercise of options under
         such Stock Plan, and

                      (iii) as soon as  practicable  after the  Effective  Time,
         file  registration  statements on Form S-3 or Form S-8, as the case may
         be (or any successor or other appropriate  forms),  with respect to the
         shares of WPL  Common  Stock  subject  to such Stock Plan to the extent
         such  registration  statement is required under applicable law, and the
         Company  shall use its best  efforts to maintain the  effectiveness  of
         such  registration  statements  (and maintain the current status of the
         prospectuses contained therein) for so long as such benefits and grants
         remain payable and such options remain outstanding.

With respect to those  individuals  who subsequent to the Merger will be subject
to the  reporting  requirements  under  Section  16(a) of the Exchange  Act, the
Company shall  administer the Stock Plans,  where  applicable,  in a manner that
complies with Rule 16b-3 promulgated under the Exchange Act.

                  Section 8.12  No Solicitations.

                  (a) No party hereto  shall,  and each such party shall use its
best   efforts   to  cause  its   Subsidiaries   not  to,   permit  any  of  its
Representatives,  directly or indirectly initiate, solicit or encourage, or take
any action to facilitate the making of any offer or proposal  which  constitutes
or is  reasonably  likely to lead to,  any  Business  Combination  Proposal  (as
hereinafter  defined),  or, in the event of an unsolicited  Business Combination
Proposal,  except  to the  extent  required  by  their  fiduciary  duties  under
applicable law if so advised in a written opinion of outside counsel,  engage in
negotiations  or provide any  information or data to any person  relating to any
Business Combination Proposal.

                  (b) Each party hereto shall  notify the other  parties  orally
and in writing of any such inquiries,  offers or proposals  (including,  without
limitation,  the terms and  conditions  of any such proposal and the identity of
the person making it),  within 24 hours of the receipt  thereof,  shall keep the
other parties

                                      -76-

<PAGE>



informed of the status and details of any such inquiry,  offer or proposal,  and
shall give the other  parties five days'  advance  notice of any agreement to be
entered into with or any  information  to be supplied to any person  making such
inquiry, offer or proposal.  Each party hereto shall immediately cease and cause
to be terminated all existing  discussions  and  negotiations,  if any, with any
parties conducted heretofore with respect to any Business Combination Proposal.

                  (c) As  used  in  this  Section  8.12,  "Business  Combination
Proposal"  shall  mean any  tender or  exchange  offer,  proposal  for a merger,
consolidation  or  other  business  combination  involving  any  party  to  this
Agreement or any of its material Subsidiaries, or any proposal or offer (in each
case, whether or not in writing and whether or not delivered to the shareholders
of a party  generally)  to acquire in any  manner,  directly  or  indirectly,  a
substantial  equity  interest in or a  substantial  portion of the assets of any
party to this Agreement or any of its material Subsidiaries, other than pursuant
to the transactions contemplated by this Agreement.

                  (d)  Nothing  contained  herein  shall  prohibit  a party from
taking  and  disclosing  to its  shareholders  a position  contemplated  by Rule
14e-2(a) under the Exchange Act with respect to a Business  Combination Proposal
made by means of a tender offer.

                  Section 8.13  Company Board of Directors.

                  (a)  WPL's,  IES's  and  Interstate's   respective  Boards  of
Directors  will take  such  action as may be  necessary  to cause the  number of
directors comprising the full Board of Directors of the Company at the Effective
Time to be fifteen  (15)  persons.  The  directors  shall be divided  into three
classes (hereafter referred to as "Class I," "Class II" and "Class III") of five
directors each.  Class I directors shall be appointed for a term expiring at the
first annual  meeting of  shareholders  of the Company  following  the Effective
Time,  Class II directors  shall be appointed  for a term expiring at the second
annual meeting of shareholders of the Company  following the Effective Time, and
Class III  directors  shall be appointed for a term expiring at the third annual
meeting of shareholders of the Company following the Effective Time, and in each
case until their respective successors have been duly elected and qualified.  Of
the directors comprising Class I, two shall be designated by each of IES and WPL
and one shall be designated by  Interstate  prior to the Effective  Time. Of the
directors  comprising  Class II, two shall be designated by each of IES and WPL,
and one shall be designated by Interstate prior to the Effective Time. Class III
directors shall consist of Lee Liu ("Mr. Liu"), Mr. Davis and Mr. Stoppelmoor as
well as two additional directors, one director designated by each of IES and WPL
prior to the Effective  Time.  Directors  designated by IES, WPL and  Interstate
(including their successors) are hereinafter sometimes referred to as the "IES

                                      -77-

<PAGE>



Directors,"   "WPL   Directors"  and   "Interstate   Directors,"   respectively.
Notwithstanding  the  foregoing,  if, prior to the Effective  Time,  any of such
designees  shall  decline  or be unable to serve,  the  respective  party  which
designated such person shall designate  another person to serve in such person's
stead. In addition, subject to the limitations set forth in Section 8.13(b), for
a period  commencing  as of the  Effective  Time and expiring on the date of the
third annual  meeting of  shareholders  of the Company  following  the Effective
Time, the IES, WPL and Interstate  Directors (each as a separate group) shall be
entitled to nominate those persons who will be eligible to be appointed, elected
or re-elected as IES, WPL and Interstate Directors,  respectively.  For purposes
of this Agreement,  Messrs.  Liu, Davis and Stoppelmoor  shall be deemed to have
been  designated  by IES, WPL and  Interstate,  respectively.  WPL's,  IES's and
Interstate's respective Boards of Directors will also take such action as may be
necessary to cause the  Nominating,  Audit and  Compensation  Committees  of the
Board  of   Directors  of  the  Company  at  the   Effective   Time  to  consist
proportionally  (to the extent  reasonably  practicable) of designees of each of
WPL, IES and Interstate.

                  (b) For a period of five years  following the Effective  Time,
no person who is an  executive  officer or employee of the Company or any of its
Subsidiaries shall be eligible to serve as a director of the Company, except for
Messrs. Liu, Davis and Stoppelmoor;  provided, however, that if Mr. Davis is not
then serving as Chief Executive Officer of the Company,  the individual  serving
in such capacity shall be eligible to serve as a director of the Company.

                  (c) Meetings of the Board of Directors of the Company shall be
reasonably  rotated  among the WPL,  IES and  Interstate  cities  for so long as
separate utility headquarters exist in those cities.

                  Section 8.14 Company Officers. At the Effective Time, pursuant
to the terms hereof and of the employment contracts referred to in Section 8.15:

                  (a) Mr. Liu shall hold the  position  of Chairman of the Board
of Directors and shall be entitled to serve in such capacity for a period of two
years from the  Effective  Time,  after which time he will retire as Chairman of
the Board of  Directors  of the Company but he shall  continue to be eligible to
serve as a director.

                  (b) Mr.  Davis  shall hold the  positions  of Chief  Executive
Officer  and  President  for a period of at least five years from the  Effective
Time.  When Mr. Liu no longer serves as Chairman of the Board of Directors,  Mr.
Davis shall be entitled to continue to serve in his capacity as Chief  Executive
Officer  and  President,  and  shall  also  serve as  Chairman  of the  Board of
Directors for at least the remainder of the five year term

                                      -78-

<PAGE>



specified above.  Subject to the five-year term specified above, Mr. Davis shall
be  entitled  to  serve  in all of the  above-referenced  capacities  until  his
successor is elected or appointed and shall have  qualified in  accordance  with
the WBCL and the Restated  Articles of Incorporation  and By-laws of the Company
(as the same shall be amended pursuant to Section 8.19). In addition,  Mr. Davis
shall hold the positions of Chief Executive Officer of each of Utilities, WP&LC,
Interstate and the Nonregulated Company (as hereinafter  defined),  and shall be
entitled  to  serve in such  capacities  for a period  of three  years  from the
Effective  Time and  until  his  successor  is duly  elected  or  appointed  and
qualified in accordance with applicable charter documents and law.

                  (c) Mr.  Stoppelmoor  shall hold the position of Vice Chairman
of the Board of  Directors of the Company and shall be entitled to serve in such
capacity for a period of two years after the Effective Time, after which time he
shall retire as Vice Chairman,  but he shall continue to be eligible to serve as
a director.

                  (d) Mr. Michael R. Chase ("Mr. Chase") shall hold the position
of President of Interstate and shall be entitled to serve in such capacity for a
period of at least three years after the Effective Time.

                  (e) Mr. Blake O. Fisher ("Mr. Fisher") shall hold the position
of President of Utilities  and shall be entitled to serve in such capacity for a
period of time subject to the discretion of its Chief Executive  Officer.  After
such time as Mr. Fisher  ceases to be President of  Utilities,  Mr. Fisher shall
assume responsibility for the Nonregulated  Company,  reporting to Mr. Davis. In
addition,  Mr.  Fisher  shall be  elected to the  positions  of  Executive  Vice
President and Chief  Financial  Officer of the Company as of the Effective  Time
and shall be entitled to serve in such  capacities  until his  successor is duly
elected or appointed and qualified in accordance  with the WBCL and the Restated
Articles  of  Incorporation  and  By-laws of the  Company  (as the same shall be
amended pursuant to Section 8.19).

                  (f) Mr. Lance W. Ahearn ("Mr.  Ahearn")  shall be appointed to
the  position  of  President  and Chief  Operating  Officer of the  Nonregulated
Company as of the Effective Time.

                  (g)  Subject  to  Section  8.14(h),  if any  of the  foregoing
persons is unable or  unwilling  to hold such  offices for the periods set forth
above,  his successor shall be selected by the Board of Directors of the Company
in accordance with its By- laws.

                  (h) For a period of five years following the Effective Time, a
majority vote of the WPL Directors or the successors  thereto shall, in addition
to any other vote required by law, be

                                      -79-

<PAGE>



required to appoint or elect any person other than Mr. Davis as Chief  Executive
Officer of the Company.

                  Section 8.15 Employment  Contracts.  WPL shall, as of or prior
to the Effective Time, enter into employment contracts with each of Messrs. Liu,
Davis,  Stoppelmoor,  Chase and Fisher in the forms set forth in Exhibit 8.15.1,
8.15.2, 8.15.3, 8.15.4 and 8.15.5, respectively.

                  Section 8.16 Post-Merger  Operations.  Following the Effective
Time, the Company shall conduct its operations or take such action in accordance
with the following:

                  (a) the Company shall  maintain its  headquarters  in Madison,
Wisconsin,  but this  location  will be evaluated  over time as future  business
needs dictate.

                  (b) during the three-year period following the Effective Time,
Utilities,  WP&LC,  and  Interstate  shall  maintain  their  separate  corporate
existences and shall maintain their  headquarters in their present  locations of
Cedar Rapids, Iowa, Madison, Wisconsin and Dubuque, Iowa, respectively;

                  (c)  immediately  following  the Effective  Time,  the Company
shall cause the IES nonregulated  holding company to merge with and into the WPL
nonregulated  holding company,  with the WPL nonregulated  holding company being
the surviving  corporation  (the combined  company is herein  referred to as the
"Nonregulated Company"); and

                  (d) during the five-year  period  following the Effective Time
or for such shorter  period as the following  entities  maintain  their separate
corporate existences,  the Company shall use its best efforts to insure that the
composition of the Board of Directors of each of Utilities, WP&LC and Interstate
and  Nonregulated  Company will be identical to the  composition of the Board of
Directors of the Company.

                  Section 8.17 Expenses.  Subject to Section 10.3, all costs and
expenses  incurred  in  connection  with  this  Agreement  and the  transactions
contemplated  hereby shall be paid by the party incurring such expenses,  except
that  those   expenses   incurred  in   connection   with   printing  the  Joint
Proxy/Registration  Statement, as well as the filing fee relating thereto, shall
be  shared by the  parties  in the  following  proportions:  43% by WPL,  14% by
Interstate and 43% by IES.

                  Section 8.18  Further  Assurances.  Each party will,  and will
cause  its  Subsidiaries  and,  will use its best  efforts  to cause  its  Joint
Ventures to,  execute  such  further  documents  and  instruments  and take such
further actions as may reasonably be requested by the terms hereof.  The parties
expressly  acknowledge and agree that, although it is their current intention to
effect a business combination among themselves in the form contemplated

                                      -80-

<PAGE>



by  this  Agreement,  it  may  be  preferable  to  effectuate  such  a  business
combination by means of an alternative  structure in light of the conditions set
forth in Section 9.1(e), Section 9.2(e), Section 9.2(f), Section 9.3(e), Section
9.3(f), Section 9.4(e) and Section 9.4(f).  Accordingly,  if the only conditions
to the parties'  obligations to consummate the Merger which are not satisfied or
waived are receipt of any one or more of the WPL Required Consents, WPL Required
Statutory  Approvals,  IES Required Consents,  IES Required Statutory Approvals,
Interstate  Required Consents,  Interstate  Required Statutory  Approvals or the
opinions referred to in Sections 9.2(e), 9.3(e), and 9.4(e), and the adoption of
an alternative  structure (that otherwise  substantially  preserves for WPL, IES
and  Interstate  the economic and other  material  benefits of the Merger) would
result in such conditions being satisfied or waived,  then the parties shall use
their respective best efforts to effect a business  combination among themselves
by means of a mutually  agreed  upon  structure  other  than the Merger  that so
preserves such benefits;  provided that, prior to closing any such  restructured
transaction,  all material third party and Governmental Authority  declarations,
filings, registrations, notices, authorizations, consents or approvals necessary
to effect such alternative business combination shall have been obtained and all
other  conditions  to the parties'  obligations  to  consummate  the Merger,  as
applied to such alternative business  combination,  shall have been satisfied or
waived.

                  Section  8.19  Charter  and  By-law  Amendments.  Prior to the
Closing, WPL shall cause its Articles of Incorporation and By-laws to be amended
as contemplated in Section 8.19 of the WPL Disclosure Schedule.

                  Section 8.20 IES Rights Agreement.  Prior to or at the time of
the Closing,  IES shall amend the IES Rights  Agreement to cause it to terminate
effective as of the Effective Time.

                                   ARTICLE IX

                                   CONDITIONS

                  Section 9.1  Conditions  to each Party's  Obligation to Effect
the Merger. The respective  obligations of each party to effect the Merger shall
be subject to the  satisfaction on or prior to the Closing Date of the following
conditions,  except,  to the  extent  permitted  by  applicable  law,  that such
conditions may be waived in writing pursuant to Section 10.5 by the joint action
of the parties hereto:

                  (a) Shareholder Approvals. The IES Shareholders' Approval, the
Interstate  Shareholders' Approval and the WPL Shareholders' Approval shall have
been obtained.

                  (b)  No  Injunction.   No  temporary   restraining   order  or
preliminary or permanent injunction or other order by any Federal

                                      -81-

<PAGE>



or state court preventing  consummation of the Merger  (including either or both
of the IES  Merger and the  Interstate  Merger)  shall  have been  issued and be
continuing in effect, and the Merger (including either or both of the IES Merger
and the Interstate Merger) and the other transactions  contemplated hereby shall
not  have  been  prohibited  under  any  applicable  Federal  or  state  law  or
regulation.

                  (c) Registration  Statement.  The Registration Statement shall
have become  effective in accordance  with the provisions of the Securities Act,
and no stop order  suspending  such  effectiveness  shall  have been  issued and
remain in effect.

                  (d) Listing of Shares. The shares of WPL Common Stock issuable
in the Merger pursuant to Article II shall have been approved for listing on the
NYSE subject only to official notice of issuance.

                  (e) Statutory Approvals.

                      (i) The WPL Required Statutory Approvals, the IES Required
         Statutory  Approvals and the Interstate  Required  Statutory  Approvals
         shall  have  been  obtained  at or prior to the  Effective  Time,  such
         approvals shall have become Final Orders (as  hereinafter  defined) and
         such Final Orders shall not impose terms or  conditions  which,  in the
         aggregate have, or insofar as reasonably can be foreseen, would have, a
         material adverse effect on the business, assets, financial condition or
         results of  operations  or  prospects  of the Company or which would be
         materially  inconsistent  with the agreements of the parties  contained
         herein.

                      (ii) As used in this Agreement, "Final Order" means action
         by the  relevant  regulatory  authority  which  has not been  reversed,
         stayed,  enjoined,  set aside,  annulled or suspended,  with respect to
         which any  waiting  period  prescribed  by law before the  transactions
         contemplated hereby may be consummated has expired, and as to which all
         conditions to the consummation of such transactions  prescribed by law,
         regulation or order have been satisfied.

                  (f)  Pooling.  Each of  WPL,  IES and  Interstate  shall  have
received a letter of its independent public accountants, dated the Closing Date,
in form and  substance  reasonably  satisfactory,  in each case, to WPL, IES and
Interstate,  stating that the transactions  effected  pursuant to this Agreement
will  qualify  as a  pooling  of  interests  transaction  pursuant  to GAAP  and
applicable SEC regulations.

                  Section 9.2 Further  Conditions to Obligation of IES to Effect
the IES Merger.  The obligation of IES to effect the IES Merger shall be further
subject to the  satisfaction,  on or prior to the Closing Date, of the following
conditions, except as may be waived by IES in writing pursuant to Section 10.5:

                                      -82-

<PAGE>




                  (a)  Performance of  Obligations.  WPL (and/or its appropriate
Subsidiaries)  and Interstate  (and/or its appropriate  Subsidiaries)  will have
performed their  agreements and covenants  contained in Sections 7.3 and 7.4 and
will  have  performed  in all  material  respects  their  other  agreements  and
covenants  contained in or contemplated  by this Agreement,  and the WPL/IES and
Interstate/IES  Stock Option Agreements required to be performed by each of them
at or prior to the Effective Time.

                  (b)  Representations  and Warranties.  The representations and
warranties of WPL and Interstate  set forth in this Agreement  shall be true and
correct (i) on and as of the date hereof and (ii) on and as of the Closing  Date
with the same effect as though such representations and warranties had been made
on and as of the Closing Date (except for  representations  and warranties  that
expressly speak only as of a specific date or time other than the date hereof or
the  Closing  Date which need only be true and  correct as of such date or time)
except in each of cases (i) and (ii) for such  failures  of  representations  or
warranties  to  be  true  and  correct   (without   regard  to  any  materiality
qualifications  contained  therein)  which,  individually or in the aggregate do
not,  and insofar as  reasonably  can be  foreseen,  would not,  result in a WPL
Material Adverse Effect or an Interstate  Material  Adverse Effect,  as the case
may be.

                  (c)   Closing   Certificates.   IES  shall  have   received  a
certificate signed by the chief financial officer of each of WPL and Interstate,
dated the Closing  Date, to the effect that, to such  officer's  knowledge,  the
conditions set forth in Section 9.2(a) and Section 9.2(b) with respect to WPL or
Interstate, as the case may be, have been satisfied.

                  (d) Material Adverse Effect. No WPL Material Adverse Effect or
Interstate Material Adverse Effect shall have occurred, and there shall exist no
facts or conditions (other than facts or conditions of general  applicability to
electric  utility  companies  in the  region in which  WPL,  IES and  Interstate
conduct their utility  operations)  which have, or insofar as reasonably  can be
foreseen,  would have a WPL Material  Adverse  Effect or an Interstate  Material
Adverse Effect, as the case may be.

                  (e) Tax Opinions.

                      (i) IES  shall  have  received  an  opinion  of  Winthrop,
         Stimson,  Putnam & Roberts  dated as of the Closing Date, to the effect
         that the IES Merger will be treated as a tax-free  reorganization under
         Section 368(a) of the Code, and

                      (ii) IES and  Winthrop,  Stimson,  Putnam & Roberts  shall
         have had the opportunity to review the tax opinions of Interstate's and
         WPL's special tax counsel received  pursuant to Sections  9.3(e)(i) and
         9.4(e)(i),  respectively,  including the representations,  covenants or
         other matters in reliance

                                      -83-

<PAGE>



         on which the  opinions  are  being  rendered,  and shall be  reasonably
         satisfied with the completeness and accuracy of said opinions.

                  (f)  Required  Consents.  The WPL  Required  Consents  and the
Interstate  Required  Consents,  the failure of which to obtain would have a WPL
Material  Adverse Effect or an Interstate  Material  Adverse Effect,  shall have
been obtained.

                  (g) Affiliate  Agreements.  WPL shall have received  Affiliate
Agreements, duly executed by each Affiliate of WPL and Interstate, substantially
in the form of Exhibit 8.8(a) or 8.8(b), as provided in Section 8.8.

                  Section 9.3 Further  Conditions to Obligation of Interstate to
Effect  the  Interstate  Merger.  The  obligation  of  Interstate  to effect the
Interstate Merger shall be further subject to the  satisfaction,  on or prior to
the  Closing  Date,  of the  following  conditions,  except  as may be waived by
Interstate in writing pursuant to Section 10.5:

                  (a)  Performance of  Obligations.  IES (and/or its appropriate
Subsidiaries) and WPL (and/or its appropriate  Subsidiaries) will have performed
their  agreements and covenants  contained in Sections 7.3 and 7.4 and will have
performed  in  all  material  respects  their  other  agreements  and  covenants
contained  in or  contemplated  by this  Agreement  and the  IES/Interstate  and
WPL/Interstate  Stock Option Agreement  required to be performed by each of them
at or prior to the Effective Time.

                  (b)  Representations  and Warranties.  The representations and
warranties of IES and WPL set forth in this Agreement  shall be true and correct
(i) on and as of the date hereof and (ii) on and as of the Closing Date with the
same effect as though such  representations  and warranties had been made on and
as of the Closing Date (except for representations and warranties that expressly
speak  only as of a  specific  date or time  other  than the date  hereof or the
Closing Date which need only be true and correct as of such date or time) except
in each of cases (i) and (ii) for such failures of representations or warranties
to be  true  and  correct  (without  regard  to any  materiality  qualifications
contained  therein) which,  individually or in the aggregate do not, and insofar
as  reasonably  can be foreseen,  would not,  result in an IES Material  Adverse
Effect or a WPL Material Adverse Effect, as the case may be.

                  (c) Closing  Certificates.  Interstate  shall have  received a
certificate  signed by the chief financial officer of each of IES and WPL, dated
the  Closing  Date,  to the  effect  that,  to  such  officer's  knowledge,  the
conditions set forth in Section 9.3(a) and Section 9.3(b) with respect to WPL or
IES, as the case may be, have been satisfied.


                                      -84-

<PAGE>



                  (d) Material Adverse Effect. No IES Material Adverse Effect or
WPL Material Adverse Effect shall have occurred,  and there shall exist no facts
or  conditions  (other  than facts or  conditions  of general  applicability  to
electric  utility  companies  in the  region in which  WPL,  IES and  Interstate
conduct their utility  operations)  which have, or insofar as reasonably  can be
foreseen,  would have an IES Material  Adverse Effect or a WPL Material  Adverse
Effect, as the case may be.

                  (e) Tax Opinions.

                      (i) Interstate  shall have received an opinion of Milbank,
         Tweed, Hadley & McCloy dated as of the Closing Date, to the effect that
         the  Interstate  Merger  will be treated  as a tax-free  reorganization
         under Section 368(a) of the Code; and

                      (ii) Interstate and Milbank,  Tweed, Hadley & McCloy shall
         have had the  opportunity to review the tax opinions of IES's and WPL's
         special  tax  counsel  received  pursuant  to  Sections  9.2(e)(i)  and
         9.4(e)(i),  respectively,  including the representations,  covenants or
         other matters in reliance on which the opinions are being rendered, and
         shall be reasonably  satisfied  with the  completeness  and accuracy of
         said opinions.

                  (f) Required  Consents.  The IES Required Consents and the WPL
Required  Consents,  the failure of which to obtain  would have an IES  Material
Adverse Effect or a WPL Material Adverse Effect, shall have been obtained.

                  (g) Affiliate  Agreements.  WPL shall have received  Affiliate
Agreements, duly executed by each Affiliate of IES and WPL, substantially in the
form of Exhibit 8.8(a) and 8.8(b), as provided in Section 8.8.

                  Section 9.4 Further  Conditions to Obligation of WPL to Effect
the Merger.  The obligation of WPL to effect the Merger shall be further subject
to  the  satisfaction,  on or  prior  to the  Closing  Date,  of  the  following
conditions, except as may be waived by WPL in writing pursuant to Section 10.5:

                  (a)  Performance of  Obligations.  IES (and/or its appropriate
Subsidiaries)  and Interstate  (and/or its appropriate  Subsidiaries)  will have
performed their  agreements and covenants  contained in Sections 7.3 and 7.4 and
will  have  performed  in all  material  respects  their  other  agreements  and
covenants  contained in or  contemplated  by this  Agreement and the IES/WPL and
Interstate/WPL  Stock  Option  Agreements  required to be  performed by it at or
prior to the Effective Time.

                  (b)  Representations  and Warranties.  The representations and
warranties of IES and Interstate  set forth in this Agreement  shall be true and
correct (i) on and as of the

                                      -85-

<PAGE>



date  hereof  and (ii) on and as of the  Closing  Date  with the same  effect as
though  such  representations  and  warranties  had  been  made on and as of the
Closing Date (except for  representations  and warranties  that expressly  speak
only as of a specific  date or time other  than the date  hereof or the  Closing
Date which need only be true and correct as of such date or time) except in each
of cases (i) and (ii) for such failures of  representations  or warranties to be
true and correct  (without  regard to any materiality  qualifications  contained
therein)  which,  individually  or in the  aggregate  do  not,  and  insofar  as
reasonably can be foreseen,  would not, result in an IES Material Adverse Effect
or an Interstate Material Adverse Effect, as the case may be.

                  (c)   Closing   Certificates.   WPL  shall  have   received  a
certificate signed by the chief financial officer of each of IES and Interstate,
dated the Closing  Date, to the effect that, to such  officer's  knowledge,  the
conditions set forth in Section 9.4(a) and Section 9.4(b) with respect to IES or
Interstate, as the case may be, have been satisfied.

                  (d) Material Adverse Effect. No IES Material Adverse Effect or
Interstate Material Adverse Effect shall have occurred, and there shall exist no
facts or conditions (other than facts or conditions of general  applicability to
electric  utility  companies  in the  region in which  WPL,  IES and  Interstate
conduct their utility  operations)  which have, or insofar as reasonably  can be
foreseen,  would have an IES Material  Adverse Effect or an Interstate  Material
Adverse Effect, as the case may be.

                  (e) Tax Opinions.

                      (i) WPL shall have  received an opinion of Foley & Lardner
         dated as of the  Closing  Date,  to the effect  that the Merger will be
         treated as a tax-free  reorganization under Section 368(a) of the Code;
         and

                      (ii)  WPL  and  Foley  &  Lardner   shall   have  had  the
         opportunity  to  review  the tax  opinions  of IES's  and  Interstate's
         special tax counsel,  as set forth in Sections 9.2(e)(i) and 9.3(e)(i),
         respectively, including the representations, covenants or other matters
         in  reliance on which the  opinions  are being  rendered,  and shall be
         reasonably  satisfied  with  the  completeness  and  accuracy  of  said
         opinions.

                  (f)  Required  Consents.  The IES  Required  Consents  and the
Interstate  Required Consents,  the failure of which to obtain would have an IES
Material  Adverse Effect or an Interstate  Material  Adverse Effect,  shall have
been obtained.

                  (g) Affiliate  Agreements.  WPL shall have received  Affiliate
Agreements, duly executed by each Affiliate of IES and Interstate, substantially
in the form of Exhibit 8.8(b), as provided in Section 8.8.

                                      -86-

<PAGE>





                                   ARTICLE X

                       TERMINATION, AMENDMENT AND WAIVER

                  Section 10.1 Termination.  This Agreement may be terminated at
any time prior to the  Closing  Date,  whether  before or after  approval by the
shareholders of the respective parties hereto contemplated by this Agreement:

                  (a) by mutual written consent of WPL, IES and Interstate;

                  (b) by any  party  hereto,  by  written  notice  to the  other
parties, if the Effective Time shall not have occurred on or before May 10, 1997
(the "Initial Termination Date"); provided, however, that the right to terminate
the  Agreement  under this Section  10.1(b)  shall not be available to any party
whose failure to fulfill any obligation  under this Agreement has been the cause
of, or resulted in, the failure of the Effective  Time to occur on or before the
Initial  Termination  Date;  and  provided,  further,  that  if on  the  Initial
Termination  Date the  conditions  to the Closing set forth in Sections  9.1(e),
9.2(f),  9.3(f)  and/or  9.4(f)  shall  not have  been  fulfilled  but all other
conditions  to the  Closing  shall be  fulfilled  or shall be  capable  of being
fulfilled, then the Initial Termination Date shall be extended to May 10, 1998;

                  (c) by any  party  hereto,  by  written  notice  to the  other
parties, if

                      (i) the WPL  Shareholders'  Approval  shall  not have been
         obtained at a duly held WPL Special Meeting, including any adjournments
         thereof, or

                      (ii) the IES  Shareholders'  Approval  shall not have been
         obtained at a duly held IES Special Meeting, including any adjournments
         thereof, or

                      (iii) the Interstate Shareholders' Approval shall not have
         been obtained at a duly held Interstate Special Meeting,  including any
         adjournments thereof;

                  (d) by any party hereto,  if any state or Federal law,  order,
rule or regulation is adopted or issued,  which has the effect,  as supported by
the written opinion of outside counsel for such party, of prohibiting the Merger
(including either or both the IES Merger and the Interstate  Merger),  or by any
party hereto if any court of competent  jurisdiction in the United States or any
State shall have issued an order,  judgment or decree  permanently  restraining,
enjoining or otherwise  prohibiting the Merger (including either or both the IES
Merger and the Interstate Merger), and such order, judgment or decree shall have
become final and nonappealable;

                                      -87-

<PAGE>




                  (e) by IES, upon two days' prior notice to WPL and Interstate,
if, as a result of a tender offer by a party other than WPL or Interstate or any
of their respective  Affiliates or any written offer or proposal with respect to
a merger, sale of a material portion of its assets or other business combination
(each, a "Business  Combination") by a party other than WPL or Interstate or any
of their respective Affiliates, the Board of Directors of IES determines in good
faith that its  fiduciary  obligations  under  applicable  law require that such
tender offer or other written offer or proposal be accepted;  provided, however,
that

                      (i) the Board of  Directors of IES shall have been advised
         in a written opinion of outside counsel that  notwithstanding a binding
         commitment to  consummate an agreement of the nature of this  Agreement
         entered into in the proper exercise of its applicable fiduciary duties,
         and  notwithstanding  all  concessions  which may be offered by WPL and
         Interstate in negotiations  entered into pursuant to clause (ii) below,
         such  fiduciary  duties would require the directors to reconsider  such
         commitment  as a result of such tender offer or other  written offer or
         proposal; and

                      (ii) prior to any such  termination,  IES shall, and shall
         cause its respective  financial and legal  advisors to,  negotiate with
         WPL and Interstate to make such adjustments in the terms and conditions
         of this Agreement as would enable IES to proceed with the  transactions
         contemplated herein on such adjusted terms;

                  (f) by Interstate, upon two days' prior notice to WPL and IES,
if, as a result  of a tender  offer by a party  other  than WPL or IES or any of
their  respective  Affiliates or any written offer or proposal with respect to a
Business Combination by a party other than WPL or IES or any of their respective
Affiliates,  the Board of Directors of Interstate  determines in good faith that
its fiduciary obligations under applicable law require that such tender offer or
other written offer or proposal be accepted; provided, however, that

                      (i) the Board of Directors of  Interstate  shall have been
         advised in a written opinion of outside counsel that  notwithstanding a
         binding  commitment  to  consummate  an agreement of the nature of this
         Agreement  entered  into  in the  proper  exercise  of  its  applicable
         fiduciary  duties,  and  notwithstanding  all concessions  which may be
         offered by WPL and IES in negotiations  entered into pursuant to clause
         (ii) below,  such  fiduciary  duties  would  require the  directors  to
         reconsider  such  commitment  as a result of such tender offer or other
         written offer or proposal; and

                      (ii) prior to any such termination,  Interstate shall, and
         shall cause its respective  financial and legal advisors to,  negotiate
         with WPL and IES to make such

                                      -88-

<PAGE>



         adjustments  in the terms and  conditions  of this  Agreement  as would
         enable Interstate to proceed with the transactions  contemplated herein
         on such adjusted terms;

                  (g) by WPL, upon two days' prior notice to IES and Interstate,
if, as a result of a tender offer by a party other than IES or Interstate or any
of their respective  Affiliates or any written offer or proposal with respect to
a Business  Combination  by a party other than IES or Interstate or any of their
respective  Affiliates,  the Board of Directors of WPL  determines in good faith
that its fiduciary  obligations  under  applicable  law require that such tender
offer or other written offer or proposal be accepted; provided, however, that

                      (i) the Board of  Directors of WPL shall have been advised
         in a written opinion of outside counsel that  notwithstanding a binding
         commitment to  consummate an agreement of the nature of this  Agreement
         entered into in the proper exercise of its applicable fiduciary duties,
         and  notwithstanding  all  concessions  which may be offered by IES and
         Interstate in negotiations  entered into pursuant to clause (ii) below,
         such  fiduciary  duties would require the directors to reconsider  such
         commitment  as a result of such tender offer or other  written offer or
         proposal; and

                      (ii) prior to any such  termination,  WPL shall, and shall
         cause its respective  financial and legal  advisors to,  negotiate with
         IES and Interstate to make such adjustments in the terms and conditions
         of this Agreement as would enable WPL to proceed with the  transactions
         contemplated herein on such adjusted terms;

                  (h)  by IES, by written notice to WPL and Interstate, if

                      (i)  there   exists   any  breach  or   breaches   of  the
         representations  and warranties of WPL or Interstate  made herein or in
         any of the Stock Option Agreements  pursuant to which either of them is
         a grantor of options, which breaches,  individually or in the aggregate
         have or,  insofar as  reasonably  can be  foreseen,  would have,  a WPL
         Material Adverse Effect or an Interstate  Material Adverse Effect,  and
         such breaches shall not have been remedied within 20 days after receipt
         by WPL or  Interstate,  as the case may be, of notice in  writing  from
         IES, specifying the nature of such breaches and requesting that they be
         remedied;

                      (ii)   WPL   or   Interstate   (and/or   its   appropriate
         Subsidiaries) shall not have performed and complied with its agreements
         and covenants contained in Sections 7.3 and 7.4 or shall have failed to
         perform  and  comply  with,  in  all  material  respects,  their  other
         agreements and covenants hereunder or under the Stock Option Agreements
         and such failure to perform or comply shall not have been remedied

                                      -89-

<PAGE>



         within 20 days after receipt by WPL or Interstate,  as the case may be,
         of notice in writing  from IES,  specifying  the nature of such failure
         and requesting that it be remedied; or

                      (iii) the Board of Directors of WPL or  Interstate  or any
         committee thereof:

                           (A) shall withdraw or modify in any manner adverse to
                  IES its approval or recommendation  of this Agreement,  or the
                  IES Merger or the Interstate Merger,

                           (B)  shall  fail  to   reaffirm   such   approval  or
                  recommendation upon IES's request,

                           (C)  shall   approve  or   recommend   any   Business
                  Combination  involving WPL or Interstate other than the Merger
                  involving WPL and Interstate or any tender offer for shares of
                  capital  stock  of WPL or  Interstate,  in  each  case,  by or
                  involving a party other than IES or any of its Affiliates or

                           (D)  shall   resolve  to  take  any  of  the  actions
                  specified in clause (A), (B) or (C);

                  (i) by Interstate, by written notice to WPL and IES, if

                      (i)  there   exists   any  breach  or   breaches   of  the
         representations  and  warranties of WPL or IES made herein or in any of
         the  Stock  Option  Agreements  pursuant  to which  either of them is a
         grantor of options,  which  breaches,  individually or in the aggregate
         have,  or insofar as  reasonably  can be  foreseen,  would have,  a WPL
         Material  Adverse Effect or an IES Material  Adverse  Effect,  and such
         breaches  shall not have been remedied  within 20 days after receipt by
         WPL or IES, as the case may be, of notice in writing  from  Interstate,
         specifying  the nature of such  breaches  and  requesting  that they be
         remedied;

                      (ii)  WPL or IES  (and/or  its  appropriate  Subsidiaries)
         shall not have performed and complied with its agreements and covenants
         contained  in Sections  7.3 and 7.4 or shall have failed to perform and
         comply  with,  in all  material  respects,  its  other  agreements  and
         covenants  hereunder  or under the  Stock  Option  Agreements  and such
         failure  to perform or comply  shall not have been  remedied  within 20
         days  after  receipt  by WPL or IES,  as the case may be,  of notice in
         writing  from  Interstate,  specifying  the nature of such  failure and
         requesting that it be remedied; or

                      (iii)  the  Board  of  Directors  of  WPL  or  IES  or any
         committee thereof:

                                      -90-

<PAGE>




                           (A) shall withdraw or modify in any manner adverse to
                  Interstate its approval or  recommendation  of this Agreement,
                  the IES Merger or the Interstate Merger,

                           (B)  shall  fail  to   reaffirm   such   approval  or
                  recommendation upon Interstate's request,

                           (C)  shall   approve  or   recommend   any   Business
                  Combination  involving  WPL  or  IES  other  than  the  Merger
                  involving  WPL and  IES or any  tender  offer  for  shares  of
                  capital  stock of WPL or IES, in each case,  by or involving a
                  party other than Interstate or any of its Affiliates or

                           (D)  shall   resolve  to  take  any  of  the  actions
                  specified in clause (A), (B) or (C); or

                  (j)  by WPL, by written notice to Interstate and IES, if

                      (i)  there   exists   any  breach  or   breaches   of  the
         representations  and  warranties of Interstate or IES made herein or in
         any of the Stock Option Agreements  pursuant to which either of them is
         a grantor of options, which breaches,  individually or in the aggregate
         have  or,  insofar  as  reasonably  can be  foreseen,  would  have,  an
         Interstate  Material  Adverse Effect or an IES Material Adverse Effect,
         and such  breaches  shall not have been  remedied  within 20 days after
         receipt by  Interstate or IES, as the case may be, of notice in writing
         from WPL,  specifying the nature of such breaches and  requesting  that
         they be remedied;

                      (ii)   Interstate   or   IES   (and/or   its   appropriate
         Subsidiaries) shall not have performed and complied with its agreements
         and covenants contained in Sections 7.3 and 7.4 or shall have failed to
         perform and comply with, in all material respects, its other agreements
         and covenants hereunder or under the Stock Option Agreements,  and such
         failure  to perform or comply  shall not have been  remedied  within 20
         days after  receipt by Interstate or IES, as the case may be, of notice
         in  writing  from  WPL,  specifying  the  nature  of such  failure  and
         requesting that it be remedied; and

                      (iii) the Board of Directors of  Interstate  or IES or any
         committee thereof:

                           (A) shall withdraw or modify in any manner adverse to
                  WPL its approval or recommendation  of this Agreement,  or the
                  IES Merger or the Interstate Merger,

                           (B)  shall  fail  to   reaffirm   such   approval  or
                  recommendation upon WPL's request,

                                      -91-

<PAGE>




                           (C)  shall   approve  or   recommend   any   Business
                  Combination  involving Interstate or IES other than the Merger
                  involving  Interstate  and  IES or any  tender  offer  for the
                  shares of capital  stock of Interstate or IES, in each case by
                  or  involving a party other than WPL or any of its  Affiliates
                  or

                           (D)  shall   resolve  to  take  any  of  the  actions
                  specified in clause (A), (B) or (C).

                  Section  10.2  Effect  of  Termination.   Subject  to  Section
11.1(b), in the event of termination of this Agreement by WPL, IES or Interstate
pursuant to Section  10.1 there shall be no liability on the part of either WPL,
IES or Interstate or their respective  officers or directors  hereunder,  except
that Section 8.1(b),  Section 8.17,  Section 10.3, Section 11.2 and Section 11.8
shall survive the termination.

                  Section 10.3  Termination Fee; Expenses.

                  (a) Termination Fee Upon Breach or Withdrawal of Approval.  If
this  Agreement is  terminated  at such time that this  Agreement is  terminable
pursuant to one or two (but not three) of (x) Section  10.1(h)(i)  or (ii),  (y)
Section 10.1(i)(i) or (ii) or (z) Section 10.1(j)(i) or (ii), then:

                      (i) each breaching party shall promptly (but no later than
         five business days after receipt of notice from the non-breaching party
         or parties (other than AMW)) pay to the non-breaching  party or parties
         in cash such breaching party's Participation Percentage (as hereinafter
         defined) of an amount equal to all  documented  out-of-pocket  expenses
         and fees  incurred by the  non-breaching  party or parties  (including,
         without limitation, fees and expenses payable to all legal, accounting,
         financial, public relations and other professional advisors arising out
         of, in  connection  with or related  to the Merger or the  transactions
         contemplated  by this  Agreement)  not in excess of $5 million  for any
         non- breaching  party;  provided,  however,  that, if this Agreement is
         terminated  by a party as a result  of a  willful  breach  by any other
         party, each non-breaching party may pursue any remedies available to it
         at  law  or  in  equity  and  shall,  in  addition  to  its  documented
         out-of-pocket expenses and fees (which shall be paid as specified above
         and shall not be limited to $5 million for any non-breaching party), be
         entitled to retain such additional amounts as such non- breaching party
         may be entitled to receive at law or in equity; and

                      (ii) if

                           (A) at the time of a breaching party's willful breach
                  of this Agreement,  there shall have been a third party tender
                  offer for shares of, or a third

                                      -92-

<PAGE>



                  party offer or proposal with respect to a Business Combination
                  involving,  such party or any of its  Affiliates  which at the
                  time of such termination  shall not have been rejected by such
                  party and its board of  directors  or  withdrawn  by the third
                  party, and

                           (B) within two and one-half years of any  termination
                  by a non-breaching  party, the breaching party or an Affiliate
                  thereof  becomes a Subsidiary  of such offeror or a Subsidiary
                  of an Affiliate of such offeror or accepts a written  offer to
                  consummate  or  consummates a Business  Combination  with such
                  offeror or an Affiliate thereof,

         then such breaching party (jointly and severally with its  Affiliates),
         at the closing (and as a condition  to the  closing) of such  breaching
         party becoming such a Subsidiary or of such Business Combination,  will
         pay to each  non-  breaching  party  (other  than  AMW)  in  cash  such
         non-breaching  party's   Participation   Percentage  of  an  additional
         aggregate fee equal to $25 million,  if WPL is the breaching party, $25
         million, if IES is the breaching party, or $12.5 million, if Interstate
         is the breaching party.

                  (b)  Additional Termination Fee.  If

                      (i) this Agreement

                           (A) is  terminated  by any party  pursuant to Section
                  10.1(e), (f) or (g),

                           (B)  is   terminated   following  a  failure  of  the
                  shareholders of any one of the necessary  parties to grant the
                  necessary  approvals  described in Section 4.13,  Section 5.13
                  and Section 6.13 or

                           (C) is terminated as a result of any party's material
                  breach of Section 8.4, and

                      (ii) at the  time  of such  termination  or  prior  to the
         meeting  of  such  party's   shareholders   there  shall  have  been  a
         third-party  tender  offer for  shares  of, or a  third-party  offer or
         proposal with respect to a Business Combination  involving,  such party
         or any of its  Affiliates  which at the time of such  termination or of
         the  meeting  of such  party's  shareholders  shall  not have  been (A)
         rejected by such party and its board of directors  or (B)  withdrawn by
         the third party, and

                      (iii)   within  two  and   one-half   years  of  any  such
         termination  described in clause (i) above,  a Target Party (as defined
         herein)  becomes a Subsidiary  of such  offeror or a  Subsidiary  of an
         Affiliate of such offeror or accepts a

                                      -93-

<PAGE>



         written offer to consummate or consummates a Business  Combination with
         such offeror or an Affiliate thereof,

         then such Target Party (jointly and severally with its Affiliates),  at
         the closing  (and as a condition  to the  closing) of such Target Party
         becoming such a Subsidiary or of such Business Combination, will pay to
         each  other  party  (other  than  AMW)  in  cash  such  other   party's
         Participation  Percentage of an aggregate  termination fee equal to $25
         million,  if WPL is the Target Party, $25 million, if IES is the Target
         Party,  or $12.5 million,  if Interstate is the Target Party,  plus, in
         each case, the documented  out-of-pocket  fees and expenses incurred by
         each such non-breaching party (including,  without limitation, fees and
         expenses payable to all legal, accounting,  financial, public relations
         and other  professional  advisors arising out of, in connection with or
         related  to  the  Merger  or  the  transactions  contemplated  by  this
         Agreement).

                  (c) Second  Termination  Fee. If this  Agreement is terminated
under circumstances that give rise to the payment of any fee pursuant to Section
10.3(b)  by  any  party,  and  thereafter,   within  nine  (9)  months  of  such
termination,  either of the parties  that was not a Target  Party at the time of
such  termination  becomes a Target Party (a "Second  Target Party") of the same
entity, or an Affiliate thereof, that caused the original Target Party to become
such, then such Second Target Party (jointly and severally with its Affiliates),
upon  the  signing  of a  definitive  agreement  relating  to  such  a  Business
Combination,  or, if no such agreement is signed,  then at the closing (and as a
condition to the closing) of such Second Target Party becoming such a Subsidiary
or of such Business  Combination,  will pay to the  remaining  party (other than
AMW) that is neither a Target  Party nor a Second  Target  Party (a  "Non-Target
Party")

                      (i) a termination fee in cash equal to $25 million, if WPL
         is the Second  Target Party,  $25 million,  if IES is the Second Target
         Party,  or $12.5  million,  if  Interstate  is the Second Target Party,
         plus, in each case, any additional  documented  out-of-pocket  fees and
         expenses   incurred  by  the  Non-Target  Party   (including,   without
         limitation,  fees  and  expenses  payable  to  all  legal,  accounting,
         financial, public relations and other professional advisors arising out
         of, in  connection  with or related  to the Merger or the  transactions
         contemplated by this Agreement); and

                      (ii) the full amount of any  termination fee paid to it by
         the first Target Party.

                  (d) Expenses.  The parties agree that the agreements contained
in this Section 10.3 are an integral part of the  transactions  contemplated  by
the Agreement and constitute  liquidated damages and not a penalty. If one party
fails to

                                      -94-

<PAGE>



promptly  pay to any other party any fee due  hereunder,  the  defaulting  party
shall  pay the  costs  and  expenses  (including  legal  fees and  expenses)  in
connection  with any action,  including the filing of any lawsuit or other legal
action,  taken to collect  payment,  together with interest on the amount of any
unpaid fee at the publicly announced prime rate of Citibank,  N.A. from the date
such fee was required to be paid.

                  (e) Limitation on Termination Fees.  Notwithstanding  anything
herein to the contrary,

                      (i) the aggregate amount payable by WPL and its Affiliates
         to IES and/or Interstate  pursuant to Section 10.3(a),  Section 10.3(b)
         and  the  terms  of  the  WPL/IES   Stock  Option   Agreement  and  the
         WPL/Interstate Stock Option Agreement shall not exceed $40 million,

                      (ii)  the  aggregate   amount   payable  by  IES  and  its
         Affiliates  pursuant to Section 10.3(a),  Section 10.3(b) and the terms
         of the IES/WPL  Stock Option  Agreement  and the  IES/Interstate  Stock
         Option Agreement shall not exceed $40 million, and

                      (iii) the aggregate  amount  payable by Interstate and its
         Affiliates under Section 10.3(a),  Section 10.3(b) and the terms of the
         Interstate/WPL  Stock Option  Agreement  and the  Interstate/IES  Stock
         Option Agreement shall not exceed $20 million

(exclusive,  in each  case,  of  reimbursement  for  fees and  expenses  payable
pursuant to this Section 10.3). For purposes of this Section 10.3(d), the amount
payable pursuant to the terms of the Stock Option Agreements shall be the amount
paid pursuant to Section 5 and/or Section 8(a)(i) and 8(a)(ii) thereof.

                  (f)  Certain Definitions.

                      (i)  Participation  Percentage.  A  party's  participation
         percentage  ("Participation  Percentage")  shall be one hundred percent
         (100%) if only one party is  required to pay or entitled to receive its
         Participation Percentage pursuant to the terms of this Section 10.3. If
         two parties are required to pay or entitled to receive their respective
         Participation Percentages,  each party's Participation Percentage shall
         equal a fraction  (expressed as a  percentage),  the numerator of which
         shall be, in the case of IES or Interstate, the number of shares of WPL
         Common Stock which would be issuable (on a fully diluted basis) to such
         party's  shareholders,  or, in the case of WPL, the number of shares of
         WPL  Common  Stock (on a fully  diluted  basis)  that  would  have been
         retained by its  shareholders,  had the Effective  Time occurred at the
         time this  Agreement is terminated  and the  denominator of which shall
         be, the aggregate number of shares of WPL Common Stock that would be

                                      -95-

<PAGE>



         issuable to or retained  by (in either case on a fully  diluted  basis)
         the  shareholders  of the two  parties  required  to pay or entitled to
         receive  their  Participation  Percentages,   had  the  Effective  time
         occurred at the time this Agreement is terminated.

                      (ii) Target Party.  The term "Target Party" shall mean any
         of WPL, IES or Interstate, or their respective Affiliates,  that is the
         subject  of a  tender  offer or offer or  proposal  with  respect  to a
         Business Combination.

                  Section 10.4  Amendment.

                  (a) This  Agreement  may be amended by the Boards of Directors
of the  parties  hereto,  at any time  before  or after  approval  hereof by the
shareholders  of WPL, IES and  Interstate  and prior to the Effective  Time, but
after such approvals, no such amendment shall

                      (i) alter or change the  amount or kind of shares,  rights
         or any of the proceedings of the treatment of shares under Article II,

                      (ii)  alter or change any of the terms and  conditions  of
         this Agreement if any of the  alterations  or changes,  alone or in the
         aggregate,  would materially  adversely affect the rights of holders of
         WPL, IES and Interstate Common Stock, or

                      (iii) alter or change any term of the Restated Articles of
         Incorporation of WPL, IES or Interstate as approved by the shareholders
         of WPL, IES and  Interstate,  respectively,  except for  alterations or
         changes  that could  otherwise  be adopted by the Board of Directors of
         the  Company,  without the further  approval of such  shareholders,  as
         applicable.

                  (b) This  Agreement may not be amended except by an instrument
in writing signed on behalf of each of the parties hereto.

                  Section 10.5  Waiver.

                  (a) At any  time  prior to the  Effective  Time,  the  parties
hereto may

                      (i)  extend  the  time for the  performance  of any of the
         obligations or other acts of the other parties hereto,

                      (ii) waive any  inaccuracies  in the  representations  and
         warranties  contained  herein  or in any  document  delivered  pursuant
         hereto and


                                      -96-

<PAGE>



                      (iii)  waive  compliance  with  any of the  agreements  or
         conditions contained herein, to the extent permitted by applicable law.

                  (b) Any  agreement  on the part of a party  hereto to any such
extension  or waiver  shall be valid if set forth in an  instrument  in  writing
signed on behalf of such party.


                                   ARTICLE XI

                               GENERAL PROVISIONS

                  Section  11.1  Non-survival;  Effect  of  Representations  and
Warranties.

                  (a) All  representations,  warranties  and  agreements in this
Agreement  shall not survive the Merger,  except as  otherwise  provided in this
Agreement  and except for the  agreements  contained in this Section 11.1 and in
Article II,  Section 8.5  (Director  and Officer  Indemnification),  Section 8.9
(Employee  Agreements and Workforce  Matters),  Section 8.10  (Employee  Benefit
Plans), Section 8.11 (Stock Option and Other Stock Plans), Section 8.13 (Company
Board of Directors),  Section 8.14 (Company Officers),  Section 8.15 (Employment
Contracts),  Section 8.16  (Post-Merger  Operations),  Section 8.17  (Expenses),
Section 11.2 (Brokers) and Section 11.7 (Parties in Interest).

                  (b)  No  party  may   assert  a  claim   for   breach  of  any
representation or warranty  contained in this Agreement (whether by direct claim
or  counterclaim)  except in connection  with the  termination of this Agreement
pursuant to Section 10.1(h)(i),  Section  10.1(i)(i),  or Section 10.1(j)(i) (or
pursuant to any other subsection of Section 10.1, if the terminating party would
have been entitled to terminate this Agreement  pursuant to Section  10.1(h)(i),
Section 10.1(i)(i) or Section 10.1(j)(i)).

                  Section 11.2  Brokers.

                  (a) WPL  represents  and  warrants  that,  except for Merrill,
whose fees have been disclosed to IES and  Interstate  prior to the date hereof,
no broker, finder or investment banker is entitled to any brokerage, finder's or
other fee or  commission  in  connection  with the Merger,  or the  transactions
contemplated by this Agreement based upon  arrangements  made by or on behalf of
WPL.

                  (b) IES represents and warrants that, except for Morgan, whose
fees have been  disclosed to WPL and  Interstate  prior to the date  hereof,  no
broker,  finder or investment  banker is entitled to any brokerage,  finder's or
other fee or commission in  connection  with the IES Merger or the  transactions
contemplated by this Agreement based upon  arrangements  made by or on behalf of
IES.

                                      -97-

<PAGE>




                  (c)  Interstate  represents  and  warrants  that,  except  for
Salomon, whose fees have been disclosed to WPL and IES prior to the date hereof,
no broker, finder or investment banker is entitled to any brokerage, finder's or
other  fee or  commission  in  connection  with  the  Interstate  Merger  or the
transactions  contemplated by this Agreement based upon  arrangements made by or
on behalf of Interstate.

                  Section  11.3  Notices.  All notices and other  communications
hereunder  shall be in  writing  and  shall  be  deemed  given if (i)  delivered
personally,  (ii) sent by reputable overnight courier service,  (iii) telecopied
(which is  confirmed),  or (iv) five days after being  mailed by  registered  or
certified  mail  (return  receipt  requested)  to the  parties at the  following
addresses  (or at such other  address for a party as shall be  specified by like
notice):

                  (a)  If to WPL, to:           WPL Holdings, Inc.
                                                222 West Washington Avenue
                                                P.O. Box 2568
                                                Madison, WI  53701-2568

                       Attention:               Erroll B. Davis, Jr.
                                                President and Chief Executive
                                                 Officer

                       Telephone:               (608) 252-3137
                       Telecopy:                (608) 252-5059

                       with a copy to:          Foley & Lardner
                                                777 East Wisconsin Avenue
                                                Milwaukee, WI 53202-5367

                       Attention:               Benjamin F. Garmer, III, Esq.

                       Telephone:               (414) 297-5675
                       Telecopy:                (414) 297-4900


                  (b)  If to IES, to:           IES Industries Inc.
                                                IES Tower
                                                200 First Street S.E.
                                                Cedar Rapids, IO 52401

                       Attention:               Stephen W. Southwick
                                                Vice President, General Counsel
                                                 and Secretary

                       Telephone:               (319) 398-8147
                       Telecopy:                (319) 398-4204

                       with a copy to:          Winthrop, Stimson, Putnam
                                                  & Roberts
                                                One Battery Park Plaza

                                      -98-

<PAGE>



                                                New York, New York 10004-1490

                       Attention:               Stephen R. Rusmisel, Esq.

                       Telephone:               (212) 858-1442
                       Telecopy:                (212) 858-1500


                  (c)  If to Interstate,
                         to:                    Interstate Power Company
                                                1000 Main Street
                                                P.O. Box 769
                                                Dubuque, IO  52004-0789

                       Attention:               Wayne H. Stoppelmoor
                                                Chairman of the Board

                       Telephone:               (319) 557-2200
                       Telecopy:                (319) 557-2202

                       with a copy to:          Milbank, Tweed, Hadley & McCloy
                                                1 Chase Manhattan Plaza
                                                New York, New York 10005-1413

                       Attention:               John T. O'Connor, Esq.

                       Telephone:               (212) 530-5548
                       Telecopy:                (212) 530-0283


                  Section 11.4  Miscellaneous.  This  Agreement  (including  the
documents and instruments referred to herein)

                  (a) constitutes the entire  agreement and supersedes all other
prior agreements and  understandings,  both written and oral, among the parties,
or any of them,  with  respect  to the  subject  matter  hereof  other  than the
Confidentiality Agreement and the Stock Option Agreements;

                  (b) shall not be assigned by  operation  of law or  otherwise;
and

                  (c) shall be governed by and construed in accordance  with the
laws of the State of  Delaware  applicable  to  contracts  executed in and to be
fully  performed in such State,  without  giving  effect to its conflicts of law
rules or  principles  or to any  requirement  as to  jurisdiction  or service of
process contained in Section 2708 of Title 6 of the Delaware Code, and except to
the  extent  the  provisions  of this  Agreement  (including  the  documents  or
instruments  referred  to herein)  are  expressly  governed  by or derive  their
authority from the WBCL, IBCA or the DGCL.


                                      -99-

<PAGE>



                  Section 11.5 Interpretation.  When a reference is made in this
Agreement  to  Sections or  Exhibits,  such  reference  shall be to a Section or
Exhibit of this Agreement,  respectively,  unless otherwise indicated. The table
of contents and headings  contained in this Agreement are for reference purposes
only and  shall not  affect in any way the  meaning  or  interpretation  of this
Agreement.  Whenever the words "include,"  "includes" or "including" are used in
this  Agreement,  they  shall be deemed  to be  followed  by the words  "without
limitation."

                  Section  11.6  Counterparts;  Effect.  This  Agreement  may be
executed  in one or more  counterparts,  each of which  shall be deemed to be an
original, but all of which shall constitute one and the same agreement.

                  Section 11.7  Parties in Interest.

                  (a) A  majority  of the IES  Directors  (or their  successors)
serving on the Board of  Directors  of the  Company  who are  designated  by IES
pursuant  to Section  8.13  (Company  Board of  Directors)  shall be entitled to
enforce or waive  compliance with the provisions of Section 8.13 during the time
such  provisions  are, by their  specific  terms,  applicable  and shall also be
entitled  during the  three-year  period  commencing at the Effective  Time (the
"Three-Year  Period")  to  enforce  the  provisions  of  Section  8.9  (Employee
Agreements  and Workforce  Matters),  Section 8.10  (Employee  Benefits  Plans),
Section 8.11 (Stock  Option and Other Stock  Plans),  Section  8.14(a)  (Company
Officers),  Section  8.15  (Employment  Contracts)  and Section  8.16(b) and (d)
(Post- Merger  Operations),  and the  agreements  referred to in Schedules  4.10
(Employee  Matters;  ERISA),  5.10  (Employee  Matters;  ERISA),  6.10 (Employee
Matters; ERISA) and 7.10 (Compensation  Benefits), in each instance on behalf of
the IES officers, directors and employees, as the case may be;

                  (b) A  majority  of the WPL  Directors  (or their  successors)
serving on the Board of  Directors  of the  Company  who are  designated  by WPL
pursuant to Section 8.13 shall be entitled to enforce or waive  compliance  with
the  provisions  of Section 8.13 during the time such  provisions  are, by their
specific  terms,  applicable  and shall also be  entitled  during the  five-year
period following the Effective Time to enforce the provisions of Section 8.14(b)
and (h) and  Section  8.16(a)  and during the Three-  Year Period to enforce the
provisions of Section 8.9, Section 8.10,  Section 8.11 and Section 8.15, and the
agreements  referred to in Schedules 4.10, 5.10, 6.10 and 7.10, in each instance
on behalf of WPL officers, directors and employees, as the case may be; and

                  (c)  A  majority  of  the   Interstate   Directors  (or  their
successors)  serving on the Board of Directors of the Company who are designated
by  Interstate  pursuant  to Section  8.13 shall be entitled to enforce or waive
compliance  with the provisions of Section 8.13 during the time such  provisions
are, by their

                                     -100-

<PAGE>

specific  terms,  applicable  and shall also be entitled  during the  Three-Year
Period to enforce the  provisions of Section 8.9,  Section  8.10,  Section 8.11,
Section  8.14(c),  Section 8.15 and Section  8.16(b) and (d), and the agreements
referred to in Schedules  4.10,  5.10, 6.10 and 7.10, in each instance on behalf
of the Interstate officers, directors and employees, as the case may be.

                  Section 11.8 Binding  Effect;  Benefits.  This Agreement shall
inure to the  benefit  of and be  binding  upon the  parties  hereto  and  their
respective  successors  and  assigns;  except as provided in Section  8.5(e) and
Section 11.7, nothing in this Agreement,  express or implied,  shall confer upon
any person,  other than the parties hereto and their  respective  successors and
assigns, any rights, remedies,  obligations or liabilities under or by reason of
this Agreement.

                  Section  11.9 WAIVER OF JURY TRIAL AND CERTAIN  DAMAGES.  EACH
PARTY TO THIS AGREEMENT  WAIVES,  TO THE FULLEST EXTENT  PERMITTED BY APPLICABLE
LAW,

                           (a) ANY  RIGHT  IT MAY  HAVE  TO A  TRIAL  BY JURY IN
         RESPECT OF ANY ACTION, SUIT OR PROCEEDING ARISING OUT OF OR RELATING TO
         THIS AGREEMENT, AND

                           (b) WITHOUT  LIMITATION TO SECTION 10.3, ANY RIGHT IT
         MAY HAVE TO RECEIVE DAMAGES FROM ANY OTHER PARTY BASED ON ANY THEORY OF
         LIABILITY  FOR ANY SPECIAL,  INDIRECT,  CONSEQUENTIAL  (INCLUDING  LOST
         PROFITS) OR PUNITIVE DAMAGES.

                  Section 11.10 Enforcement.  The parties agree that irreparable
damage  would occur in the event that any of the  provisions  of this  Agreement
were not performed in accordance  with their  specific  terms or were  otherwise
breached.  It is  accordingly  agreed that the  parties  shall be entitled to an
injunction or injunctions  to prevent  breaches of this Agreement and to enforce
specifically  the terms and  provisions  hereof,  this being in  addition to any
other remedy to which they are entitled at law or in equity.

                                     -101-

<PAGE>


                  IN WITNESS WHEREOF,  WPL, IES,  Interstate and AMW have caused
this  Agreement  to be  signed  by  their  respective  officers  thereunto  duly
authorized as of the date first written above.


                                             WPL HOLDINGS, INC.

Attest:


By:/s/ EDWARD M. GLEASON                     By:/s/ ERROLL B. DAVIS, JR.
   ---------------------                        ---------------------------
   Name:   Edward M. Gleason                    Name:   Erroll B. Davis, Jr.
   Title:  Secretary                            Title:  President and Chief
                                                         Executive Officer

                                             IES INDUSTRIES INC.

Attest:


By:/s/ STEPHEN W. SOUTHWICK                  By:/s/ LEE LIU
   ------------------------                     -----------
   Name:   Stephen W. Southwick                 Name:   Lee Liu
   Title:  Secretary and General                Title:  Chairman of the Board,
            Counsel                                      President and Chief
                                                         Executive Officer

                                             INTERSTATE POWER COMPANY

Attest:


By:/s/ JOSEPH C. McGOWAN                     By:/s/ WAYNE H. STOPPELMOOR
   ---------------------                        ------------------------
   Name:  Joseph C. McGowan                     Name:   Wayne H. Stoppelmoor
   Title: Secretary - Treasurer                 Title:  President and Chief
                                                         Executive Officer


                                             AMW ACQUISITION, INC.

Attest:


By:/s/ EDWARD M. GLEASON                     By:/s/ ERROLL B. DAVIS, JR.
   ---------------------                        -------------------------
   Name:   Edward M. Gleason                    Name:   Erroll B. Davis, Jr.
   Title:  Secretary                            Title:  President




                                                                       EXHIBIT A


                   OPTION GRANTOR/OPTION HOLDER STOCK OPTION
                         AND TRIGGER PAYMENT AGREEMENT


                  This STOCK  OPTION  AGREEMENT,  dated as of November  10, 1995
(the "Agreement") by and among WPL Holdings, Inc., a corporation organized under
the laws of the State of Wisconsin  ("OPTION  GRANTOR" or the "Company") and IES
Industries  Inc., a  corporation  organized  under the laws of the State of Iowa
("OPTION HOLDER").

                          W I T N E S S E T H   T H A T:

                  WHEREAS,  concurrently with the execution and delivery of this
Agreement,   OPTION  GRANTOR,   OPTION  HOLDER,   Interstate  Power  Company,  a
corporation  organized  under the laws of the State of Delaware  ("Interstate"),
and AMW Acquisition, Inc., a wholly-owned subsidiary of OPTION GRANTOR organized
under the laws of the State of Delaware ("AMW"),  are entering into an Agreement
and Plan of Merger,  dated as of November  10, 1995,  (the "Merger  Agreement"),
which  provides,  inter  alia,  upon the terms  and  subject  to the  conditions
thereof,  for the  merger of  OPTION  HOLDER  with and into  OPTION  GRANTOR  in
accordance with the laws of the States of Wisconsin and Iowa (the "IES Merger"),
and the merger of AMW with and into  Interstate in  accordance  with the laws of
the State of  Delaware  (the  "Interstate  Merger",  and  together  with the IES
Merger, the "Merger");

                  WHEREAS,  in  connection  with  the  execution  of the  Merger
Agreement,  OPTION  GRANTOR,  OPTION  HOLDER and  Interstate  are entering  into
certain  stock  option  agreements  dated as of the date  hereof,  of which this
Agreement  is one,  whereby the parties  hereto  grant each other an option with
respect to certain  shares of each other's common stock on the terms and subject
to the conditions set forth therein (the "Stock Option Agreements"); and

                  WHEREAS,  as a condition  to OPTION  HOLDER's  willingness  to
enter into the Merger Agreement, OPTION HOLDER has requested that OPTION GRANTOR
agree,  and OPTION  GRANTOR has so agreed,  to grant to OPTION  HOLDER an option
with respect to certain shares of OPTION  GRANTOR's  common stock,  on the terms
and subject to the conditions set forth herein;

                  NOW,  THEREFORE,  to induce  OPTION  HOLDER to enter  into the
Merger   Agreement  and  certain  of  the  Stock  Option   Agreements,   and  in
consideration  of the  representations,  warranties,  covenants  and  agreements
contained  herein, in the Merger Agreement and in the Stock Option Agreements to
which OPTION GRANTOR and OPTION

<PAGE>

HOLDER are parties,  the parties hereto,  intending to be legally bound,  hereby
agree as follows:

                  1.  GRANT OF OPTION.

                  (a) Subject to the  receipt of all  regulatory  approvals  and
orders  required  by OPTION  GRANTOR as set forth in  Section  4.4(c) of the WPL
Disclosure Schedule to the Merger Agreement and by OPTION HOLDER as set forth in
Section 5.4(c) of the IES Disclosure  Schedule to the Merger  Agreement,  OPTION
GRANTOR hereby grants OPTION HOLDER an irrevocable  option (the "OPTION  GRANTOR
Option")  to  purchase up to that  number of shares,  subject to  adjustment  as
provided in Section 12 (the "OPTION GRANTOR Shares"), of common stock, par value
$.01 per share, of OPTION GRANTOR (the "OPTION GRANTOR Common Stock") equal to a
percentage (the "Option Shares  Percentage"),  which Option Shares Percentage is
equal to the  OPTION  HOLDER's  Participation  Percentage  as  defined  below in
subsection (e), of 6,123,944  shares of OPTION GRANTOR Common Stock (being 19.9%
of the number of shares of OPTION GRANTOR Common Stock issued and outstanding as
of November 10, 1995, the "Initial  Number") in the manner set forth below, at a
price (the "Exercise Price") per OPTION GRANTOR Share of $30.675 (which is equal
to the Fair Market Value (as defined  below) of a OPTION GRANTOR Share as of the
date hereof).

                  (b) The Exercise Price shall  be  payable,  at OPTION HOLDER's
option, as follows:

                           (i)   in cash, or

                           (ii)  subject to the receipt of all  approvals of any
         Governmental  Authority  required  for OPTION  GRANTOR to acquire,  and
         OPTION HOLDER to issue,  the OPTION  HOLDER  Shares (as defined  below)
         from OPTION HOLDER,  in shares of common stock, no par value, of OPTION
         HOLDER ("OPTION HOLDER Shares"),

in either case in accordance with Section 4 hereof.

                  (c) Notwithstanding  the  foregoing,  in no event  shall  the
number  of  OPTION  GRANTOR  Shares  for  which  the  OPTION  GRANTOR  Option is
exercisable  exceed the product of the Option Shares  Percentage and the Initial
Number, subject to adjustment as provided in Section 12.

                  (d) As used herein, the "Fair Market Value" of any share shall
be the average of the daily  closing  sales price for such share on the New York
Stock  Exchange (the "NYSE") during the ten NYSE trading days prior to the fifth
NYSE trading day preceding the date such Fair Market Value is to be determined.

                  (e) For  purposes of this  Agreement  the term  "Participation
Percentage"  shall have the same meaning as in Section  10.3(f)(i) of the Merger
Agreement,  except that the numerator and denominator  shall be calculated based
on the number of shares of WPL

                                     - 2 -

<PAGE>

Common  Stock which would be issuable  (or, in the case of WPL,  retained by its
shareholders) on a fully diluted basis had the Effective Time occurred as of the
date on which the  Exercise  Notice is delivered  under  Section 2 hereof or the
date on which demand for the Trigger  Payment (as defined herein) is given under
Section 5 hereof,  as the case may be. Other  capitalized  terms used herein but
not defined herein shall have the meanings set forth in the Merger Agreement.

                  2.  EXERCISE OF OPTION.

                  (a) The  OPTION  GRANTOR  Option  may be  exercised  by OPTION
HOLDER,  in whole or in part,  at any time or from time to time after the Merger
Agreement becomes  terminable by OPTION HOLDER under  circumstances  which could
entitle OPTION HOLDER to a termination  fee under Section  10.3(a) of the Merger
Agreement  (provided that the events specified in Section  10.3(a)(ii)(A) of the
Merger  Agreement shall have occurred,  although the events specified in Section
10.3(a)(ii)(B) thereof need not have occurred), or Section 10.3(b) of the Merger
Agreement  (regardless of whether the Merger Agreement is actually terminated or
whether  there occurs a closing of any Business  Combination  involving a Target
Party or a closing by which a Target Party becomes a Subsidiary), any such event
by which the Merger  Agreement  becomes so  terminable  by OPTION  HOLDER  being
referred to herein as a "Trigger Event").

                  (b)      (i)  OPTION   GRANTOR  shall  notify  OPTION  HOLDER
         promptly in writing of the  occurrence of any Trigger  Event,  it being
         understood  that the giving of such notice by OPTION  GRANTOR shall not
         be a condition  to the right of OPTION  HOLDER to  exercise  the OPTION
         GRANTOR Option.

                           (ii) In the event  OPTION  HOLDER  wishes to exercise
         the  OPTION  GRANTOR  Option,  OPTION  HOLDER  shall  deliver to OPTION
         GRANTOR  written  notice (an "Exercise  Notice")  specifying  the total
         number of OPTION GRANTOR Shares it wishes to purchase.

                           (iii)  Upon the  giving  by  OPTION  HOLDER to OPTION
         GRANTOR  of the  Exercise  Notice  and  the  tender  of the  applicable
         aggregate Exercise Price, OPTION HOLDER, to the extent permitted by law
         and OPTION GRANTOR's  organizational  documents,  and provided that the
         conditions to OPTION  GRANTOR's  obligation to issue the OPTION GRANTOR
         Shares  to OPTION  HOLDER  hereunder  set forth in  Section 3 have been
         satisfied or waived,  shall be deemed to be the holder of record of the
         OPTION GRANTOR Shares issuable upon such exercise, notwithstanding that
         the stock transfer books of OPTION GRANTOR shall then be closed or that
         certificates  representing such OPTION GRANTOR Shares shall not then be
         actually delivered to OPTION HOLDER.

                           (iv) Each  closing  of a purchase  of OPTION  GRANTOR
         Shares (a "Closing")  shall occur at a place,  on a date, and at a time
         designated  by OPTION HOLDER in an Exercise  Notice  delivered at least
         two business days prior to the date of the Closing.

                                     - 3 -

<PAGE>

                  (c) The  OPTION  GRANTOR  Option  shall  terminate  upon  the 
earliest to occur of:

                           (i)   the Effective Time of the Merger;

                           (ii)  the   termination  of  the  Merger   Agreement
         pursuant to Section 10.1 thereof,  other than under circumstances which
         also constitute a Trigger Event under this Agreement;

                           (iii) 180  days  following  any  termination  of the
         Merger  Agreement upon or during the continuance of a Trigger Event (or
         if, at the expiration of such 180 day period, the OPTION GRANTOR Option
         cannot  be  exercised  by reason of any  applicable  judgment,  decree,
         order,  law or regulation,  ten business days after such  impediment to
         exercise  shall have been  removed or shall have  become  final and not
         subject to appeal,  but in no event under this clause  (iii) later than
         May 10, 1998); and

                           (iv) payment by OPTION GRANTOR of the Trigger Payment
         set forth in Section 5 of this Agreement to OPTION HOLDER.

                  (d) Notwithstanding  the foregoing,  the OPTION GRANTOR Option
may not be  exercised if (i) OPTION  HOLDER is in material  breach of any of its
representations or warranties,  or in material breach of any of its covenants or
agreements,  contained in this Agreement or in the Merger  Agreement,  or (ii) a
Trigger  Payment has been paid pursuant to Section 5 of this Agreement or demand
therefor has been made and not withdrawn.

                  3.  CONDITIONS TO CLOSING.  The  obligation  of OPTION GRANTOR
to issue the OPTION GRANTOR Shares to OPTION HOLDER hereunder is subject to the
conditions that

                  (a) all waiting periods,  if any, under the HSR Act applicable
to the issuance and  acquisition of the OPTION GRANTOR  Shares  hereunder  shall
have expired or have been terminated;

                  (b) the OPTION  GRANTOR  Shares,  and any OPTION HOLDER Shares
which are issued in payment of the Exercise Price,  shall have been approved for
listing on the NYSE subject only to official notice of issuance;

                  (c) all consents,  approvals,  orders or authorizations of, or
registrations,  declarations  or  filings  with,  any  federal,  state  or local
administrative   agency  or  commission  or  other   federal,   state  or  local
Governmental  Authority,  if any,  required in  connection  with the issuance by
OPTION GRANTOR and the acquisition by OPTION HOLDER of the OPTION GRANTOR Shares
hereunder shall have been obtained or made, including,  without limitation,  the
approval  of the SEC  under  Sections  9 and 10 of the  Public  Utility  Holding
Company Act of 1935,  as amended  (the "1935  Act"),  the approval of the Public
Service  Commission of Wisconsin of the issuance of the OPTION GRANTOR Shares by
OPTION GRANTOR and, if applicable,  the  acquisition of OPTION GRANTOR Shares by
OPTION

                                     - 4 -

<PAGE>

HOLDER,  and the approval of the Iowa Utilities  Board of the acquisition of the
OPTION GRANTOR Shares by OPTION HOLDER and, if  applicable,  the  acquisition by
OPTION  GRANTOR of the OPTION  HOLDER  Shares  constituting  the Exercise  Price
hereunder; and

                  (d) no preliminary  or permanent  injunction or other order by
any court of competent  jurisdiction  prohibiting or otherwise  restraining such
issuance shall be in effect.

The condition set forth in paragraph (b) above may be waived by OPTION  GRANTOR,
in the case of OPTION HOLDER Shares, and by OPTION HOLDER, in the case of OPTION
GRANTOR Shares, in the sole discretion of the waiving party.

                  4.  CLOSING.  At any Closing,

                  (a)  OPTION  GRANTOR  shall  deliver  to OPTION  HOLDER or its
designee a single  certificate  in definitive  form  representing  the number of
OPTION GRANTOR Shares  designated by OPTION HOLDER in its Exercise Notice,  such
certificate to be registered in the name of OPTION HOLDER and to bear the legend
set forth in Section 13; and

                  (b) OPTION  HOLDER   shall  deliver  to  OPTION  GRANTOR  the
aggregate price for the OPTION GRANTOR Shares  so designated and being purchased
by

                           (i)   wire transfer of immediately available funds or
         certified check or bank check, or

                           (ii)  subject to the condition  in Section  1(b)(ii),
         delivery of a certificate or  certificates  representing  the number of
         OPTION  HOLDER  Shares being issued by OPTION  HOLDER in  consideration
         thereof, determined in accordance with Section 4(c).

                  (c) In the event  that  OPTION  HOLDER  issues  OPTION  HOLDER
Shares to OPTION GRANTOR in  consideration  of OPTION GRANTOR Shares pursuant to
Section  4(b)(ii),  the number of OPTION  HOLDER Shares to be so issued shall be
equal to the quotient obtained by dividing:

                             (i) the product of (x) the number of OPTION GRANTOR
         Shares  with  respect  to which  the  OPTION  GRANTOR  Option  is being
         exercised and (y) the Exercise Price, by

                             (ii) the Fair  Market  Value of the  OPTION  HOLDER
         Shares  as of the date  immediately  preceding  the  date the  Exercise
         Notice is delivered to OPTION GRANTOR.

                  (d) OPTION  GRANTOR  shall pay all  expenses,  and any and all
Federal,  state  and  local  taxes  and other  charges  that may be  payable  in
connection with the preparation,  issue and delivery of stock certificates under
this Section 4.

                                     - 5 -

<PAGE>

                  5.  TRIGGER PAYMENT.

                  (a)  Trigger  Payment.  Subject to the  provisions  of Section
10.3(e) of the Merger Agreement,  if a Trigger Event shall have occurred and any
regulatory approval or order required for the issuance by OPTION GRANTOR, or the
acquisition by OPTION HOLDER, of the OPTION GRANTOR Option pursuant to Section 1
hereof  shall not have been  obtained,  OPTION  HOLDER  shall  have the right to
receive,  and OPTION GRANTOR shall pay to OPTION HOLDER, an amount (the "Trigger
Payment") equal to the product of

                             (i) the  maximum  number of OPTION  GRANTOR  Shares
         that would have been subject to purchase by OPTION HOLDER upon exercise
         of the OPTION GRANTOR Option pursuant to Sections 1 and 2 hereof if all
         such regulatory approvals or orders had been obtained, and

                             (ii) the  difference  between (A) the  Market/Offer
         Price (as defined herein), determined as of the date on which notice of
         demand for the Trigger  Payment is given by OPTION HOLDER,  and (B) the
         Exercise Price (but only if such Market/Offer Price is higher than such
         Exercise Price).

Demand for the Trigger  Payment shall be given by notice in accordance  with the
provisions  of Section 17 hereof.  The Trigger  Payment  shall be paid to OPTION
HOLDER by OPTION  GRANTOR  on the  Payment  Date (as  defined  herein),  by wire
transfer  of  immediately  available  funds to an  account to be  designated  in
writing by OPTION  HOLDER not less than two  business  days  before the  Payment
Date.

                  (b) Payment  Date.  For purposes of this  Section 5,  "Payment
Date" means the date on which termination fees are required to be paid by OPTION
GRANTOR to OPTION HOLDER under Sections 10.3(a) or 10.3(b),  as the case may be,
of the Merger  Agreement  as a result of the  occurrence  of the  Trigger  Event
referred to in subsection (a) of this Section 5.

                  (c)  Certain   Conditions.   OPTION   GRANTOR  shall  have  no
obligation to pay the Trigger  Payment if OPTION HOLDER is in material breach of
any of its  representations  or warranties,  or in material breach of any of its
covenants or agreements, contained in this Agreement or in the Merger Agreement.

                  6.  REPRESENTATIONS AND WARRANTIES OF OPTION
GRANTOR.  OPTION GRANTOR represents and warrants to OPTION HOLDER that

                  (a)  Except  as  set  forth  in  Section  4.4(a)  of  the  WPL
Disclosure  Schedule to the Merger  Agreement,  OPTION GRANTOR has the corporate
power  and  authority  to  enter  into  this  Agreement  and to  carry  out  its
obligations  hereunder,  subject  in the case of the  repurchase  of the  OPTION
GRANTOR Shares  pursuant to Section 8(a) to applicable law and the provisions of
OPTION  GRANTOR's  Articles of  Incorporation,  as amended (the "OPTION  GRANTOR
Articles");

                                     - 6 -

<PAGE>

                  (b) this  Agreement  has been duly and  validly  executed  and
delivered by OPTION GRANTOR, and, assuming the due authorization,  execution and
delivery  hereof by OPTION  HOLDER and the  receipt of all  required  regulatory
approvals,  constitutes  a valid  and  binding  obligation  of  OPTION  GRANTOR,
enforceable  against OPTION GRANTOR in accordance with its terms,  except as may
be limited by applicable bankruptcy, insolvency, reorganization or other similar
laws affecting the enforcement of creditors' rights  generally,  and except that
the availability of equitable remedies,  including specific performance,  may be
subject to the discretion of any court before which any proceeding  therefor may
be brought;

                  (c) OPTION GRANTOR has taken all necessary corporate action to
authorize  and reserve for issuance and to permit it to issue,  upon exercise of
the OPTION  GRANTOR  Option,  and at all times from the date hereof  through the
expiration of the OPTION GRANTOR  Option will have reserved,  the Initial Number
of authorized and unissued OPTION GRANTOR  Shares,  such amount being subject to
adjustment  as  provided in Section 12, all of which,  upon their  issuance  and
delivery  in  accordance  with  the  terms  of  this  Agreement,  will  be  duly
authorized,  validly issued,  fully paid and nonassessable  (except as otherwise
provided in Section 180.0622(2)(b) of the WBCL);

                  (d) upon  delivery  of the  OPTION  GRANTOR  Shares  to OPTION
HOLDER  upon the  exercise  of the OPTION  GRANTOR  Option,  OPTION  HOLDER will
acquire the OPTION GRANTOR Shares free and clear of all claims,  liens, charges,
encumbrances and security interests of any nature whatsoever;

                  (e)  except  as  described  in  Section   4.4(b)  of  the  WPL
Disclosure Schedule to the Merger Agreement,  the execution and delivery of this
Agreement by OPTION GRANTOR does not, and, subject to compliance with applicable
law and the OPTION GRANTOR Articles with respect to the repurchase of the OPTION
GRANTOR Shares  pursuant to Section 8(a), the  consummation by OPTION GRANTOR of
the transactions contemplated hereby will not, violate, conflict with, or result
in a breach of any provision of, or constitute a default (with or without notice
or a lapse  of time,  or both)  under,  or  result  in the  termination  of,  or
accelerate  the  performance  required by, or result in a right of  termination,
cancellation,  or  acceleration  of any  obligation  or the  loss of a  material
benefit under,  or the creation of a lien,  pledge,  security  interest or other
encumbrance  on  assets  (any  such  conflict,   violation,  default,  right  of
termination,  cancellation,   acceleration,  loss  or  creation,  hereinafter  a
"Violation") of OPTION GRANTOR or any of its Subsidiaries, pursuant to

                             (i) any provision of the OPTION GRANTOR Articles or
         the Bylaws of OPTION GRANTOR,

                             (ii) any  provisions of any material loan or credit
         agreement,  note,  mortgage,  indenture,  lease,  benefit plan or other
         agreement,  obligation,  instrument,  permit, concession,  franchise or
         license  (any of the  foregoing  in  effect  on the date  hereof  being
         referred  to  as a  "Material  Contract")  of  OPTION  GRANTOR  or  its
         subsidiaries or to which any of them is a party, or

                                     - 7 -

<PAGE>

                             (iii) any judgment,  order, decree,  statute,  law,
         ordinance,  rule or  regulation  applicable  to OPTION  GRANTOR  or its
         properties or assets,

which Violation, in the case of each clauses (ii) and (iii), could reasonably be
expected to have an OPTION  GRANTOR  Material  Adverse  Effect  (except  that no
representation  or  warranty is given  concerning  any  Violation  of a Material
Contract with respect to the  repurchase of OPTION  GRANTOR  Shares  pursuant to
Section 8(a));

                  (f)  except  as  described  in  Section   4.4(c)  of  the  WPL
Disclosure  Schedule  to the  Merger  Agreement  or  Section 1 or 3 hereof,  the
execution  and delivery of this  Agreement  by OPTION  GRANTOR does not, and the
performance of this  Agreement by OPTION GRANTOR will not,  require any consent,
approval,  authorization  or permit  of,  filing  with or  notification  to, any
Governmental Authority;

                  (g) none of OPTION  GRANTOR,  any of its  affiliates or anyone
acting on its or their  behalf,  has  issued,  sold or offered  any  security of
OPTION GRANTOR to any person under  circumstances  that would cause the issuance
and sale of OPTION GRANTOR Shares,  as  contemplated  by this  Agreement,  to be
subject to the  registration  requirements of the Securities Act as in effect on
the date hereof,  and,  assuming the  representations  and  warranties of OPTION
HOLDER  contained in Section 7(g) are true and correct,  the issuance,  sale and
delivery  of the  OPTION  GRANTOR  Shares  hereunder  would be  exempt  from the
registration and prospectus  delivery  requirements of the Securities Act, as in
effect on the date hereof (and OPTION  GRANTOR  shall not take any action  which
would cause the issuance,  sale, and delivery of OPTION GRANTOR Shares hereunder
not to be exempt from such requirements); and

                  (h)  any  OPTION  HOLDER  Shares  acquired  pursuant  to  this
Agreement  will be acquired for OPTION  GRANTOR's  own account,  for  investment
purposes  only,  and will not be acquired by OPTION  GRANTOR  with a view to the
public  distribution  thereof in  violation of any  applicable  provision of the
Securities Act.

                  7.  REPRESENTATIONS AND WARRANTIES OF OPTION HOLDER.
OPTION HOLDER represents and warrants to OPTION GRANTOR that

                  (a)  Except  as set  forth  in  Schedule  5.4(a)  of  the  IES
Disclosure  Schedule to the Merger  Agreement,  OPTION  HOLDER has the corporate
power  and  authority  to  enter  into  this  Agreement  and to  carry  out  its
obligations hereunder;

                  (b) this  Agreement  has been duly and  validly  executed  and
delivered by OPTION HOLDER and,  assuming the due  authorization,  execution and
delivery  hereof by OPTION  GRANTOR and the receipt of all  required  regulatory
approvals,  constitutes  a  valid  and  binding  obligation  of  OPTION  HOLDER,
enforceable  against  OPTION HOLDER in  accordance  with its  respective  terms,
except as may be limited by applicable bankruptcy,  insolvency,  reorganization,
or other similar laws affecting the enforcement of creditors'  rights generally,
and except that the  availability  of  equitable  remedies,  including  specific
performance,  may be subject to the  discretion  of any court  before  which any
proceeding may be brought;

                                     - 8 -

<PAGE>

                  (c)  prior  to  any  delivery  of  OPTION   HOLDER  Shares  in
consideration of the purchase of OPTION GRANTOR Shares pursuant  hereto,  OPTION
HOLDER will have taken all necessary  corporate action to authorize for issuance
and to permit it to issue such OPTION HOLDER  Shares,  all of which,  upon their
issuance and delivery in accordance  with the terms of this  Agreement,  will be
duly authorized, validly issued, fully paid and nonassessable;

                  (d) upon any delivery of such OPTION  HOLDER  Shares to OPTION
GRANTOR in  consideration  of the  purchase of OPTION  GRANTOR  Shares  pursuant
hereto,  OPTION  GRANTOR will acquire the OPTION HOLDER Shares free and clear of
all claims,  liens,  charges,  encumbrances and security interests of any nature
whatsoever;

                  (e)  except  as  described  in  Section   5.4(b)  of  the  IES
Disclosure Schedule to the Merger Agreement,  the execution and delivery of this
Agreement by OPTION  HOLDER does not, and the  consummation  by OPTION HOLDER of
the transactions contemplated hereby will not, violate, conflict with, or result
in the breach of any  provision  of, or  constitute  a default  (with or without
notice or a lapse of time, or both) under,  or result in any Violation by OPTION
HOLDER or any of its Subsidiaries, pursuant to

                             (i) any provision of the Articles of  Incorporation
         or Bylaws of OPTION HOLDER,

                             (ii) any Material  Contract of OPTION HOLDER or any
         of its subsidiaries or to which any of them is a party, or

                             (iii) any judgment,  order, decree,  statute,  law,
         ordinance,  rule or  regulation  applicable  to  OPTION  HOLDER  or its
         properties or assets,

which  Violation,  in the case of each of clauses  (ii) or (iii),  would have an
OPTION HOLDER Material Adverse Effect;

                  (f)  except  as  described  in  Section   5.4(c)  of  the  IES
Disclosure  Schedule  to the  Merger  Agreement  or  Section 1 or 3 hereof,  the
execution  and  delivery of this  Agreement  by OPTION  HOLDER does not, and the
consummation by OPTION HOLDER of the transactions  contemplated hereby will not,
require  any  consent,  approval,  authorization  or permit of,  filing  with or
notification to, any Governmental Authority; and

                  (g) any OPTION  GRANTOR  Shares  acquired upon exercise of the
OPTION  GRANTOR  Option will be acquired for OPTION  HOLDER's  own account,  for
investment  purposes only and will not be, and the OPTION  GRANTOR Option is not
being, acquired by OPTION HOLDER with a view to the public distribution thereof,
in violation of any applicable provision of the Securities Act.

                  8.  CERTAIN REPURCHASES.

                  (a) OPTION  HOLDER "PUT".  At  the request of OPTION HOLDER by
written notice (x) at  any  time  during  which  the  OPTION  GRANTOR  Option is
exercisable

                                     - 9 -

<PAGE>

pursuant  to  Section  2 (the  "Repurchase  Period"),  OPTION  GRANTOR  (or  any
successor  entity  thereof)  shall,  if permitted by applicable  law, the OPTION
GRANTOR Articles and Bylaws and OPTION GRANTOR's Material Contracts,  repurchase
from OPTION HOLDER all or any portion of the OPTION GRANTOR Option, at the price
set forth in subparagraph  (i) below,  or, (y) at any time prior to May 10, 1997
(provided  that  such  date  shall  be  extended  to  May  10,  1998  under  the
circumstances  where the date after which either party may  terminate the Merger
Agreement  pursuant to Section 10.1(b) of the Merger Agreement has been extended
to May 10, 1998),  OPTION GRANTOR (or any successor  entity  thereof)  shall, if
permitted by applicable  law, the OPTION GRANTOR  Articles and Bylaws and OPTION
GRANTOR's Material  Contracts,  repurchase from OPTION HOLDER all or any portion
of the OPTION GRANTOR Shares  purchased by OPTION HOLDER  pursuant to the OPTION
GRANTOR Option, at the price set forth in subparagraph (ii) below:

                         (i) (A) The difference between the "Market/Offer Price"
         (as defined  below) for shares of OPTION GRANTOR Common Stock as of the
         date OPTION  HOLDER  gives  notice of its intent to exercise its rights
         under this Section 8 and the Exercise  Price,  multiplied by the number
         of OPTION  GRANTOR  Shares  purchasable  pursuant to the OPTION GRANTOR
         Option (or  portion  thereof  with  respect to which  OPTION  HOLDER is
         exercising   its  rights  under  this  Section  8),  but  only  if  the
         Market/Offer Price is greater than the Exercise Price.

                             (B) for purposes  of  this Agreement, "Market/Offer
         Price")  shall  mean,  as of any date,  the higher of (I) the price per
         share offered as of such date pursuant to any tender or exchange  offer
         or other offer with respect to a Business Combination  involving OPTION
         GRANTOR as the Target  Party  which was made prior to such date and not
         terminated  or withdrawn as of such date and (II) the Fair Market Value
         of OPTION GRANTOR Common Stock as of such date.

                        (ii) (A) the product of (I) the sum of (a) the  Exercise
         Price paid by OPTION HOLDER per OPTION GRANTOR Share acquired  pursuant
         to the OPTION GRANTOR Option, and (b) the difference between the "Offer
         Price" (as defined below) and the Exercise Price, but only if the offer
         Price is greater that the Exercise Price, and (II) the number of OPTION
         GRANTOR Shares so to be repurchased pursuant to this Section 8.

                             (B) For  purposes  of  this clause (ii), the "Offer
         Price"  shall be the  highest  price per share  offered  pursuant  to a
         tender or exchange offer or other Business  Combination offer involving
         OPTION GRANTOR as the Target Party during the  Repurchase  Period prior
         to the delivery by OPTION HOLDER of a notice of repurchase.

                  (b) REDELIVERY OF OPTION HOLDER SHARES. If OPTION HOLDER shall
have  previously  elected to  purchase  OPTION  GRANTOR  Shares  pursuant to the
exercise of the OPTION  GRANTOR  Option by the  issuance  and delivery of OPTION
HOLDER Shares,  then OPTION GRANTOR shall, if so requested by OPTION HOLDER,  in
fulfillment of its obligation pursuant to Section 8(a)(y) (that is, with respect
to the  Exercise  Price only and without  limitation  to its  obligation  to pay
additional consideration under clause

                                     - 10 -

<PAGE>

(b) of Section  8(a)(ii)(A)(I)),  redeliver  the  certificates  for such  OPTION
HOLDER Shares to OPTION HOLDER, free and clear of all liens, claims, charges and
encumbrances of any kind or nature whatsoever; provided, however, that if at any
time less than all of the OPTION  GRANTOR  Shares so purchased by OPTION  HOLDER
pursuant to the OPTION  GRANTOR  Option are to be  repurchased by OPTION GRANTOR
pursuant to Section  8(a)(y),  then (i) OPTION  GRANTOR  shall be  obligated  to
redeliver to OPTION  HOLDER the same  proportion of such OPTION HOLDER Shares as
the number of OPTION  GRANTOR  Shares that OPTION  GRANTOR is then  obligated to
repurchase  bears to the  number of OPTION  GRANTOR  Shares  acquired  by OPTION
HOLDER upon exercise of the OPTION  GRANTOR  Option and (ii) OPTION HOLDER shall
issue to OPTION GRANTOR new certificates representing those OPTION HOLDER Shares
which are not due to be  redelivered  to OPTION HOLDER  pursuant to this Section
8(b) to the  extent  that  excess  OPTION  HOLDER  Shares  are  included  in the
certificates redelivered to OPTION HOLDER by OPTION GRANTOR.

                  (c)  PAYMENT  AND  REDELIVERY  OF OPTION  GRANTOR  OPTIONS  OR
SHARES.  In the event OPTION  HOLDER  exercises its rights under this Section 8,
OPTION  GRANTOR  shall,  within ten business days  thereafter,  pay the required
amount to OPTION HOLDER in immediately  available  funds and OPTION HOLDER shall
surrender to OPTION  GRANTOR the OPTION  GRANTOR  Option or the  certificate  or
certificates  evidencing the OPTION  GRANTOR  Shares  purchased by OPTION HOLDER
pursuant hereto, and OPTION HOLDER shall warrant that it owns the OPTION GRANTOR
Option or such shares and that the OPTION GRANTOR Option or such shares are then
free and clear of all liens,  claims,  damages,  charges and encumbrances of any
kind or nature whatsoever.

                  (d) OPTION  HOLDER  "CALL".  If OPTION  HOLDER has  elected to
purchase  OPTION GRANTOR  Shares  pursuant to the exercise of the OPTION GRANTOR
Option by the  issuance and delivery of OPTION  HOLDER  Shares,  notwithstanding
that OPTION  HOLDER may no longer hold any such  OPTION  GRANTOR  Shares or that
OPTION  HOLDER  elects not to exercise  its other  rights  under this Section 8,
OPTION  HOLDER  may  require,  at any time or from time to time prior to May 10,
1997  (provided  that such date  shall be  extended  to May 10,  1998  under the
circumstances  where the date after which either party may  terminate the Merger
Agreement  pursuant to Section 10.1(b) of the Merger Agreement has been extended
to May 10, 1998), OPTION GRANTOR to sell to OPTION HOLDER any such OPTION HOLDER
Shares at the price  attributed to such OPTION HOLDER Shares pursuant to Section
4 plus  interest  at the rate of 8.75% per annum on such amount from the Closing
Date relating to the exchange of such OPTION HOLDER Shares pursuant to Section 4
to the Closing Date under this  Section  8(d) less any  dividends on such OPTION
HOLDER Shares paid during such period or declared and payable to stockholders of
record on a date during such period.

                  (e) REPURCHASE PRICE REDUCED AT OPTION HOLDER'S OPTION. In the
event the repurchase  price specified in Section 8(a) would subject the purchase
of the OPTION GRANTOR  Option or the OPTION  GRANTOR Shares  purchased by OPTION
HOLDER  pursuant to the OPTION GRANTOR Option to a vote of the  shareholders  of
OPTION GRANTOR pursuant to applicable law or the OPTION GRANTOR Articles, then

                                     - 11 -

<PAGE>

OPTION HOLDER may, at its  election,  reduce the  repurchase  price to an amount
which would permit such repurchase  without the necessity for such a shareholder
vote.

                  9.  VOTING OF SHARES.  Following  the date hereof and prior to
the fifth  anniversary of the date hereof (the  "Expiration  Date"),  each party
shall vote any shares of capital stock of the other party acquired by such party
pursuant to this Agreement  ("Restricted  Shares"),  including any OPTION HOLDER
Shares issued pursuant to Section 1(b), or otherwise  beneficially owned (within
the meaning of Rule 13d-3 promulgated under the Securities Exchange Act of 1934,
as amended (the "Exchange  Act")),  by such party on each matter  submitted to a
vote of shareholders of such other party for and against such matter in the same
proportion as the vote of all other  shareholders  of such other party are voted
(whether by proxy or otherwise) for and against such matter.

                  10. RESTRICTIONS ON TRANSFER.

                  (a) RESTRICTIONS ON TRANSFER.  Prior to the Expiration  Date,
neither party shall,  directly or indirectly,  by operation of law or otherwise,
sell, assign,  pledge, or otherwise dispose of or transfer any Restricted Shares
beneficially  owned by such party, other than (i) pursuant to Section 8, or (ii)
in accordance with Section 10(b) or Section 11.

                  (b) PERMITTED  SALES.  Following the termination of the Merger
Agreement, a party shall be permitted to sell any Restricted Shares beneficially
owned by it if such sale is made pursuant to a tender or exchange offer that has
been approved or recommended,  or otherwise  determined to be fair to and in the
best  interests of the  shareholders  of the other  party,  by a majority of the
members of the Board of  Directors  of such other party,  which  majority  shall
include a majority of directors who were directors prior to the  announcement of
such tender or exchange offer.

                  11. REGISTRATION RIGHTS.

                  (a) Following the termination of the Merger Agreement,  either
party hereto that owns Restricted Shares (a "Designated  Holder") may by written
notice (the "Registration Notice") to the other party (the "Registrant") request
the  Registrant  to  register  under the  Securities  Act all or any part of the
Restricted Shares beneficially owned by such Designated Holder (the "Registrable
Securities")  pursuant  to a  bona  fide  firm  commitment  underwritten  public
offering,  in which the Designated  Holder and the underwriters  shall effect as
wide a distribution of such Registrable  Securities as is reasonably practicable
and shall use their best efforts to prevent any person  (including any Group (as
used in Rule 13d-5 under the Exchange Act)) and its affiliates  from  purchasing
through  such  offering  Restricted  Shares  representing  more  than  1% of the
outstanding shares of common stock of the Registrant on a fully diluted basis (a
"Permitted Offering").

                                     - 12 -

<PAGE>

                  (b)  The  Registration  Notice  shall  include  a  certificate
executed by the Designated Holder and its proposed managing  underwriter,  which
underwriter  shall  be an  investment  banking  firm  of  nationally  recognized
standing (the "Manager"), stating that

                           (i) they  have a good  faith  intention  to  commence
         promptly a Permitted Offering, and

                           (ii) the manager in good faith believes  that,  based
         on the then-prevailing  market conditions,  it will be able to sell the
         Registrable  Securities  at a per share  price equal to at least 80% of
         the then Fair Market Value of such shares.

                  (c)  The  Registrant  (and/or  any  person  designated  by the
Registrant)  shall  thereupon  have the option  exercisable  by  written  notice
delivered to the Designated Holder within ten business days after the receipt of
the Registration Notice, irrevocably to agree to purchase all or any part of the
Registrable  Securities  proposed to be so sold for cash at a price (the "Option
Price") equal to the product of (i) the number of  Registrable  Securities to be
so  purchased  by the  Registrant  and (ii) the then Fair  Market  Value of such
shares.

                  (d) Any purchase of  Registrable  Securities by the Registrant
(or its  designee)  under Section 11(c) shall take place at a closing to be held
at the principal  executive  offices of the  Registrant or at the offices of its
counsel at any reasonable date and time designated by the Registrant and/or such
designee in such  notice  within  twenty  business  days after  delivery of such
notice,  and any  payment  for the  shares to be so  purchased  shall be made by
delivery at the time of such closing in immediately available funds.

                  (e) If the  Registrant  does not elect to exercise  its option
pursuant to this Section 11 with respect to all Registrable Securities, it shall
use its best efforts to effect,  as promptly as  practicable,  the  registration
under the Securities Act of the unpurchased  Registrable  Securities proposed to
be so sold; provided, however, that

                           (i)  neither  party  shall be entitled to demand more
         than an aggregate of two effective  registration  statements hereunder,
         and

                           (ii) the Registrant  will not be required to file any
         such registration statement during any period of time (not to exceed 40
         days after  such  request in the case of clause (A) below or 90 days in
         the case of clauses (B) and (C) below) when

                                (A) the  Registrant is in possession of material
                  non-public  information which it reasonably  believes would be
                  detrimental  to be  disclosed at such time and, in the opinion
                  of  counsel  to the  Registrant,  such  information  would  be
                  required to be  disclosed  if a  registration  statement  were
                  filed at that time;

                                (B)  the   Registrant  is  required   under  the
                  Securities Act to include audited financial statements for any
                  period  in such  registration  statement  and  such  financial
                  statements  are  not  yet  available  for  inclusion  in  such
                  registration statement; or

                                     - 13 -

<PAGE>

                                (C) the Registrant determines, in its reasonable
                  judgment,  that such  registration  would  interfere  with any
                  financing, acquisition or other material transaction involving
                  the Registrant or any of its affiliates.

                  (f) The Registrant  shall use its  reasonable  best efforts to
cause any Registrable  Securities  registered  pursuant to this Section 11 to be
qualified for sale under the  securities or Blue Sky laws of such  jurisdictions
as the  Designated  Holder  may  reasonably  request  and  shall  continue  such
registration or qualification in effect in such jurisdiction; provided, however,
that the  Registrant  shall not be  required  to qualify to do  business  in, or
consent to general  service of process  in, any  jurisdiction  by reason of this
provision.

                  (g) The  registration  rights set forth in this Section 11 are
subject to the condition that the Designated Holder shall provide the Registrant
with such information with respect to such holder's Registrable Securities,  the
plans for the distribution  thereof,  and such other information with respect to
such holder as, in the  reasonable  judgment of counsel for the  Registrant,  is
necessary to enable the Registrant to include in such registration statement all
material  facts  required  to  be  disclosed  with  respect  to  a  registration
thereunder.

                  (h) A  registration  effected  under this  Section 11 shall be
effected at the  Registrant's  expense,  except for  underwriting  discounts and
commissions  and the fees and the expenses of counsel to the Designated  Holder,
and  the  Registrant  shall  provide  to  the  underwriters  such  documentation
(including  certificates,   opinions  of  counsel  and  "comfort"  letters  from
auditors) as is customary in connection with  underwritten  public  offerings as
such underwriters may reasonably require.

                  (i) In connection  with any  registration  effected under this
Section 11, the parties agree

                           (i) to indemnify each other and the  underwriters  in
         the customary manner,

                           (ii) to enter into an underwriting  agreement in form
         and substance  customary for transactions of such type with the Manager
         and the other underwriters participating in such offering, and

                          (iii)  to take  all  further  actions  which  shall be
         reasonably necessary to effect such registration and sale (including if
         the   Manager   deems  it   necessary,   participating   in   road-show
         presentations).

                  (j) The  Registrant  shall  be  entitled  to  include  (at its
expense)  additional  shares  of its  common  stock in a  registration  effected
pursuant  to this  Section 11 only if and to the extent the  Manager  determines
that such inclusion will not adversely  affect the prospects for success of such
offering.

                  12.  ADJUSTMENT  UPON  CHANGES  IN   CAPITALIZATION.   Without
limitation to any  restriction on OPTION GRANTOR  contained in this Agreement or
in the Merger  Agreement,  in the event of any change in OPTION  GRANTOR  Common
Stock by

                                     - 14 -

<PAGE>

reason  of  stock  dividends,   splitups,   mergers  (other  than  the  Merger),
recapitalizations,  combinations,  exchange of shares or the like,  the type and
number of shares or securities  subject to the OPTION  GRANTOR  Option,  and the
purchase price per share provided in Section 1, shall be adjusted  appropriately
to  restore  to OPTION  HOLDER  its  rights  hereunder,  including  the right to
purchase from OPTION GRANTOR (or its successors) shares of OPTION GRANTOR Common
Stock (or such other shares or securities into which OPTION GRANTOR Common Stock
has been so changed)  representing  the Option Shares  Percentage of the Initial
Number of shares of OPTION GRANTOR Common Stock for the aggregate Exercise Price
calculated as of the date of this Agreement as provided in Section 1.

                  13. RESTRICTIVE LEGENDS. Each certificate  representing OPTION
GRANTOR Shares issued to OPTION HOLDER  hereunder,  and OPTION HOLDER Shares, if
any,  delivered  to  OPTION  GRANTOR  at a  Closing,  shall  include a legend in
substantially the following form:

         THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED
         UNDER THE SECURITIES ACT OF 1933, AS AMENDED,  OR ANY STATE  SECURITIES
         OR BLUE SKY LAWS, AND MAY BE REOFFERED OR SOLD ONLY IF SO REGISTERED OR
         IF AN EXEMPTION FROM SUCH  REGISTRATION  IS AVAILABLE.  SUCH SECURITIES
         ARE ALSO SUBJECT TO ADDITIONAL RESTRICTIONS ON TRANSFER AS SET FORTH IN
         THE OPTION HOLDER STOCK OPTION AND TRIGGER PAYMENT AGREEMENT,  DATED AS
         OF NOVEMBER 10,  1995, A COPY OF WHICH MAY BE OBTAINED  FROM THE ISSUER
         UPON REQUEST.

It is understood and agreed that:

                           (i) the reference to the resale  restrictions  of the
         Securities  Act and  state  securities  or Blue Sky  laws in the  above
         legend  shall be  removed  by  delivery  of  substitute  certificate(s)
         without such reference if OPTION HOLDER or OPTION GRANTOR,  as the case
         may be, shall have delivered to the other party a copy of a letter from
         the staff of the SEC, or an opinion of counsel,  in form and  substance
         satisfactory  to the other party, to the effect that such legend is not
         required for purposes of the Securities Act or such laws;

                           (ii)  the   reference  to  the   provisions  to  this
         Agreement  in  the  above  legend  shall  be  removed  by  delivery  of
         substitute  certificate(s)  without  such  reference if the shares have
         been sold or  transferred  in  compliance  with the  provisions of this
         Agreement and under  circumstances that do not require the retention of
         such reference; and

                           (iii) the legend  shall be removed in its entirety if
         the  conditions  in  the  preceding  clauses  (i)  and  (ii)  are  both
         satisfied.

                                     - 15 -

<PAGE>

In addition, such certificates shall bear any other legend as may be required by
law.  Certificates  representing  shares sold in a  registered  public  offering
pursuant  to  Section 11 shall not be  required  to bear the legend set forth in
this Section 13.

                  14.   BINDING   EFFECT;   NO   ASSIGNMENT;   NO  THIRD   PARTY
BENEFICIARIES. (a) This Agreement shall be binding upon and inure to the benefit
of the parties hereto and their respective successors and permitted assigns.

                  (b)  Except  as  expressly  provided  for in  this  Agreement,
neither this  Agreement nor the rights or obligations of either party hereto are
assignable, except by operation of law, or with the written consent of the other
party.

                  (c) Nothing  contained in this Agreement,  express or implied,
is intended to confer  upon any person  other than the parties  hereto and their
respective  permitted assigns any rights or remedies of any nature whatsoever by
reason of this Agreement.

                  (d) Any Restricted  Shares sold by a party in compliance  with
the provisions of Section 11 shall,  upon  consummation of such sale, be free of
the restrictions  imposed with respect to such shares by this Agreement,  unless
and until such party shall  repurchase or otherwise  become the beneficial owner
of such shares,  and any  transferee of such shares shall not be entitled to the
registration rights of such party.

                  15.  SPECIFIC  PERFORMANCE.  The  parties  hereto  agree  that
irreparable  harm would  occur in the event that any of the  provisions  of this
Agreement were not performed in accordance  with their  specified  terms or were
otherwise  breached.  It is accordingly  agreed that the parties hereto shall be
entitled to an injunction or injunctions  to prevent  breaches of this Agreement
and to enforce  specifically the terms and provisions hereof in any court of the
United  States or any state having  jurisdiction,  this being in addition to any
other remedy to which they are entitled at law or equity.

                  16. VALIDITY.  (a) The invalidity or  unenforceability  of any
provision of this Agreement shall not affect the validity or  enforceability  of
the other  provisions  of this  Agreement,  which shall remain in full force and
effect.

                  (b) In the event any court or other competent  authority holds
any provisions of this Agreement to be null, void or unenforceable,  the parties
hereto shall  negotiate in good faith the execution and delivery of an amendment
to this Agreement in order, as nearly as possible, to effectuate,  to the extent
permitted  by law,  the  intent  of the  parties  hereto  with  respect  to such
provision and the economic effects thereof.

                  (c)  Subject to Section 5, if for any reason any such court or
regulatory agency determines that OPTION HOLDER is not permitted to acquire,  or
OPTION  GRANTOR is not permitted to  repurchase  pursuant to Section 8, the full
number of shares of OPTION GRANTOR Common Stock provided in Section 1 hereof (as
the same may be  adjusted),  it is the express  intention  of OPTION  GRANTOR to
allow OPTION HOLDER to acquire or to require OPTION  GRANTOR to repurchase  such
lesser  number  of  shares  as may  be  permissible  without  any  amendment  or
modification hereof.

                                     - 16 -

<PAGE>

                  (d)  Each  party  agrees  that,  should  any  court  or  other
competent  authority  hold any provision of this  Agreement or part hereof to be
null, void or unenforceable,  or order any party to take any action inconsistent
herewith,  or not take any action required herein,  the other party shall not be
entitled  to specific  performance  of such  provision  or part hereof or to any
other remedy,  including but not limited to money damages,  for breach hereof or
of any other  provision  of this  Agreement or part hereof as the result of such
holding or order.

                  17. NOTICES.  All notices and other  communications  hereunder
shall be in writing and shall be deemed given if (a)  delivered  personally,  or
(b) if sent by overnight courier service (receipt confirmed in writing),  or (c)
if delivered by facsimile  transmission  (with receipt  confirmed),  or (d) five
days  after  being  mailed by  registered  or  certified  mail  (return  receipt
requested)  to the parties in each case to the  following  addresses (or at such
other address for a party as shall be specified by like notice):

                  A.       If to OPTION HOLDER, to:

                           IES Industries Inc.
                           IES Tower
                           200 First Street S.E.
                           Cedar Rapids, Iowa  52401

                           Attention:  Lee Liu
                           Fax:  (319) 398-4204

                           with a copy to:

                           Winthrop, Stimson, Putnam & Roberts
                           One Battery Park Plaza
                           New York, New York  10004-1490

                           Attention:  Stephen R. Rusmisel, Esq.
                           Fax:  (212) 858-1500

                  B.       If to OPTION GRANTOR, to:

                           WPL Holdings, Inc.
                           222 West Washington Avenue
                           Madison, Wisconsin  53703

                           Attention:  Erroll B. Davis, Jr.
                           Fax:  (608) 252-5059

                                     - 17 -

<PAGE>

                           with a copy to:

                           Foley & Lardner
                           777 East Wisconsin Avenue
                           Milwaukee, Wisconsin  53202-5367

                           Attention:  Benjamin F. Garmer, III, Esq.
                           Fax:  (414) 297-4900

                  18.  GOVERNING  LAW. This  Agreement  shall be governed by and
construed in  accordance  with the laws of the State of Delaware  applicable  to
agreements  made and to be  performed  entirely  within  such State and  without
regard to its choice of law principles or to any  requirement as to jurisdiction
or service of process contained in Section 2708 of Title 6 of the Delaware Code.

                  19. INTERPRETATION.

                  (a) When  reference  is made in this  Agreement  to  Articles,
Sections or Exhibits, such reference shall be to an Article,  Section or Exhibit
of this Agreement, as the case may be, unless otherwise indicated.

                  (b) The  table of  contents  and  headings  contained  in this
Agreement are for reference purposes and shall not affect in any way the meaning
or interpretation of the Agreement.

                  (c) Whenever the words  "include,"  "includes," or "including"
are used in this  Agreement,  they shall be deemed to be  followed  by the words
"without limitation."

                  (d)  Whenever  "or"  is used in this  Agreement  it  shall  be
construed in the nonexclusive sense.

                  20.  COUNTERPARTS;  EFFECT.  This Agreement may be executed in
one or more counterparts,  each of which shall be deemed to be an original,  but
all of which shall constitute one and the same agreement.

                  21. AMENDMENTS;  WAIVER.  This Agreement may be amended by the
parties  hereto and the terms and  conditions  hereof  may be waived  only by an
instrument in writing signed on behalf of each of the parties hereto, or, in the
case of a waiver,  by an  instrument  signed  on  behalf  of the  party  waiving
compliance.

                  22. EXTENSION OF TIME PERIODS.  The time periods for exercises
of certain  rights under  Sections 2, 7 and 8 shall be extended (but in no event
by more than six months):

                  (a) to the extent necessary to obtain all regulatory approvals
for the exercise of such rights, and for the expiration of all statutory waiting
periods; and

                                     - 18 -

<PAGE>

                  (b) to the  extent  necessary  to avoid  any  liability  under
Section 16(b) of the Exchange Act by reason of such exercise.



                      THIS SPACE INTENTIONALLY LEFT BLANK





                                     - 19 -

<PAGE>


                  IN WITNESS  WHEREOF,  the  parties  hereto  have  caused  this
Agreement to be executed by their respective duly authorized  officers as of the
date first above written.

                                            WPL HOLDINGS, INC.


                                            By:/s/ ERROLL B. DAVIS, JR.
                                               ------------------------
                                               Name:   Erroll B. Davis, Jr.
                                               Title:  President and Chief
                                                        Executive Officer

                                            IES INDUSTRIES INC.


                                            By:/s/ LEE LIU
                                               -----------
                                               Name:   Lee Liu
                                               Title:  Chairman of the Board
                                                        President and Chief
                                                        Executive Officer



                                     - 20 -

<PAGE>

                                                                    EXHIBIT B

                   OPTION GRANTOR/OPTION HOLDER STOCK OPTION
                         AND TRIGGER PAYMENT AGREEMENT


                  This STOCK  OPTION  AGREEMENT,  dated as of November  10, 1995
(the "Agreement") by and among WPL Holdings, Inc., a corporation organized under
the laws of the State of  Wisconsin  ("OPTION  GRANTOR"  or the  "Company")  and
Interstate Power Company, a corporation organized under the laws of the State of
Delaware ("OPTION HOLDER").

                          W I T N E S S E T H   H A T:

                  WHEREAS,  concurrently with the execution and delivery of this
Agreement,  OPTION GRANTOR,  OPTION HOLDER,  IES Industries  Inc., a corporation
organized  under the laws of the  State of Iowa  ("IES"),  and AMW  Acquisition,
Inc., a wholly-owned  subsidiary of OPTION GRANTOR  organized  under the laws of
the State of  Delaware  ("AMW"),  are  entering  into an  Agreement  and Plan of
Merger, dated as of November 10, 1995, (the "Merger Agreement"), which provides,
inter alia, upon the terms and subject to the conditions thereof, for the merger
of IES with and into OPTION GRANTOR in accordance with the laws of the States of
Wisconsin  and Iowa  (the  "IES  Merger"),  and the  merger of AMW with and into
OPTION  HOLDER  in  accordance  with the  laws of the  State  of  Delaware  (the
"Interstate Merger", and together with the IES Merger, the "Merger");

                  WHEREAS,  in  connection  with  the  execution  of the  Merger
Agreement, OPTION GRANTOR, OPTION HOLDER and IES are entering into certain stock
option  agreements dated as of the date hereof,  of which this Agreement is one,
whereby the parties  hereto  grant each other an option with  respect to certain
shares of each other's  common stock on the terms and subject to the  conditions
set forth therein (the "Stock Option Agreements"); and

                  WHEREAS,  as a condition  to OPTION  HOLDER's  willingness  to
enter into the Merger Agreement, OPTION HOLDER has requested that OPTION GRANTOR
agree,  and OPTION  GRANTOR has so agreed,  to grant to OPTION  HOLDER an option
with respect to certain shares of OPTION  GRANTOR's  common stock,  on the terms
and subject to the conditions set forth herein;

                  NOW,  THEREFORE,  to induce  OPTION  HOLDER to enter  into the
Merger   Agreement  and  certain  of  the  Stock  Option   Agreements,   and  in
consideration  of the  representations,  warranties,  covenants  and  agreements
contained  herein, in the Merger Agreement and in the Stock Option Agreements to
which  OPTION  GRANTOR  and  OPTION  HOLDER are  parties,  the  parties  hereto,
intending to be legally bound, hereby agree as follows:

                  1. GRANT OF OPTION.

<PAGE>

                  (a) Subject to the  receipt of all  regulatory  approvals  and
orders  required  by OPTION  GRANTOR as set forth in  Section  4.4(c) of the WPL
Disclosure Schedule to the Merger Agreement and by OPTION HOLDER as set forth in
Section 6.4(c) of the Interstate  Disclosure  Schedule to the Merger  Agreement,
OPTION GRANTOR  hereby grants OPTION HOLDER an  irrevocable  option (the "OPTION
GRANTOR Option") to purchase up to that number of shares,  subject to adjustment
as provided in Section 12 (the "OPTION GRANTOR  Shares"),  of common stock,  par
value $.01 per share,  of OPTION  GRANTOR (the "OPTION  GRANTOR  Common  Stock")
equal to a percentage  (the "Option  Shares  Percentage"),  which Option  Shares
Percentage is equal to the OPTION HOLDER's  Participation  Percentage as defined
below in  subsection  (e), of 6,123,944  shares of OPTION  GRANTOR  Common Stock
(being 19.9% of the number of shares of OPTION  GRANTOR  Common Stock issued and
outstanding  as of November  10, 1995,  the "Initial  Number") in the manner set
forth  below,  at a price (the  "Exercise  Price") per OPTION  GRANTOR  Share of
$30.675  (which is equal to the Fair Market Value (as defined below) of a OPTION
GRANTOR Share as of the date hereof).

                  (b) The Exercise  Price shall be payable,  at OPTION  HOLDER's
option, as follows:

                           (i) in cash, or

                           (ii)  subject to the receipt of all  approvals of any
         Governmental  Authority  required  for OPTION  GRANTOR to acquire,  and
         OPTION HOLDER to issue,  the OPTION  HOLDER  Shares (as defined  below)
         from OPTION  HOLDER,  in shares of common  stock,  $3.50 par value,  of
         OPTION HOLDER ("OPTION HOLDER Shares"),

in either case in accordance with Section 4 hereof.

                  (c)  Notwithstanding  the  foregoing,  in no event  shall  the
number  of  OPTION  GRANTOR  Shares  for  which  the  OPTION  GRANTOR  Option is
exercisable  exceed the product of the Option Shares  Percentage and the Initial
Number, subject to adjustment as provided in Section 12.

                  (d) As used herein, the "Fair Market Value" of any share shall
be the average of the daily  closing  sales price for such share on the New York
Stock  Exchange (the "NYSE") during the ten NYSE trading days prior to the fifth
NYSE trading day preceding the date such Fair Market Value is to be determined.

                  (e) For  purposes of this  Agreement  the term  "Participation
Percentage"  shall have the same meaning as in Section  10.3(f)(i) of the Merger
Agreement,  except that the numerator and denominator  shall be calculated based
on the number of shares of WPL Common Stock which would be issuable  (or, in the
case of WPL,  retained by its  shareholders)  on a fully  diluted  basis had the
Effective Time occurred as of the date on which the Exercise Notice is delivered
under  Section 2 hereof or the date on which demand for the Trigger  Payment (as
defined herein) is given under Section 5 hereof, as the case may

                                     - 2 -

<PAGE>

be. Other  capitalized  terms used herein but not defined  herein shall have the
meanings set forth in the Merger Agreement.

                  2.  EXERCISE OF OPTION.

                  (a) The  OPTION  GRANTOR  Option  may be  exercised  by OPTION
HOLDER,  in whole or in part,  at any time or from time to time after the Merger
Agreement becomes  terminable by OPTION HOLDER under  circumstances  which could
entitle OPTION HOLDER to a termination  fee under Section  10.3(a) of the Merger
Agreement  (provided that the events specified in Section  10.3(a)(ii)(A) of the
Merger  Agreement shall have occurred,  although the events specified in Section
10.3(a)(ii)(B) thereof need not have occurred), or Section 10.3(b) of the Merger
Agreement  (regardless of whether the Merger Agreement is actually terminated or
whether  there occurs a closing of any Business  Combination  involving a Target
Party or a closing by which a Target Party becomes a Subsidiary), any such event
by which the Merger  Agreement  becomes so  terminable  by OPTION  HOLDER  being
referred to herein as a "Trigger Event").

                  (b) (i) OPTION GRANTOR shall notify OPTION HOLDER  promptly in
writing of the occurrence of any Trigger  Event,  it being  understood  that the
giving of such notice by OPTION GRANTOR shall not be a condition to the right of
OPTION HOLDER to exercise the OPTION GRANTOR Option.

                           (ii) In the event  OPTION  HOLDER  wishes to exercise
         the  OPTION  GRANTOR  Option,  OPTION  HOLDER  shall  deliver to OPTION
         GRANTOR  written  notice (an "Exercise  Notice")  specifying  the total
         number of OPTION GRANTOR Shares it wishes to purchase.

                           (iii)  Upon the  giving  by  OPTION  HOLDER to OPTION
         GRANTOR  of the  Exercise  Notice  and  the  tender  of the  applicable
         aggregate Exercise Price, OPTION HOLDER, to the extent permitted by law
         and OPTION GRANTOR's  organizational  documents,  and provided that the
         conditions to OPTION  GRANTOR's  obligation to issue the OPTION GRANTOR
         Shares  to OPTION  HOLDER  hereunder  set forth in  Section 3 have been
         satisfied or waived,  shall be deemed to be the holder of record of the
         OPTION GRANTOR Shares issuable upon such exercise, notwithstanding that
         the stock transfer books of OPTION GRANTOR shall then be closed or that
         certificates  representing such OPTION GRANTOR Shares shall not then be
         actually delivered to OPTION HOLDER.

                           (iv) Each  closing  of a purchase  of OPTION  GRANTOR
         Shares (a "Closing")  shall occur at a place,  on a date, and at a time
         designated  by OPTION HOLDER in an Exercise  Notice  delivered at least
         two business days prior to the date of the Closing.

                  (c)  The  OPTION  GRANTOR  Option  shall  terminate  upon  the
earliest to occur of:

                           (i)   the Effective Time of the Merger;

                                     - 3 -

<PAGE>

                           (ii) the termination of the Merger Agreement pursuant
         to Section  10.1  thereof,  other than under  circumstances  which also
         constitute a Trigger Event under this Agreement;

                           (iii)  180  days  following  any  termination  of the
         Merger  Agreement upon or during the continuance of a Trigger Event (or
         if, at the expiration of such 180 day period, the OPTION GRANTOR Option
         cannot  be  exercised  by reason of any  applicable  judgment,  decree,
         order,  law or regulation,  ten business days after such  impediment to
         exercise  shall have been  removed or shall have  become  final and not
         subject to appeal,  but in no event under this clause  (iii) later than
         May 10, 1998); and

                           (iv) payment by OPTION GRANTOR of the Trigger Payment
         set forth in Section 5 of this Agreement to OPTION HOLDER.

                  (d) Notwithstanding  the foregoing,  the OPTION GRANTOR Option
may not be  exercised if (i) OPTION  HOLDER is in material  breach of any of its
representations or warranties,  or in material breach of any of its covenants or
agreements,  contained in this Agreement or in the Merger  Agreement,  or (ii) a
Trigger  Payment has been paid pursuant to Section 5 of this Agreement or demand
therefor has been made and not withdrawn.

                  3. CONDITIONS TO CLOSING.  The obligation of OPTION GRANTOR to
issue the OPTION  GRANTOR  Shares to OPTION  HOLDER  hereunder is subject to the
conditions that

                  (a) all waiting periods,  if any, under the HSR Act applicable
to the issuance and  acquisition of the OPTION GRANTOR  Shares  hereunder  shall
have expired or have been terminated;

                  (b) the OPTION  GRANTOR  Shares,  and any OPTION HOLDER Shares
which are issued in payment of the Exercise Price,  shall have been approved for
listing on the NYSE subject only to official notice of issuance;

                  (c) all consents,  approvals,  orders or authorizations of, or
registrations,  declarations  or  filings  with,  any  federal,  state  or local
administrative   agency  or  commission  or  other   federal,   state  or  local
Governmental  Authority,  if any,  required in  connection  with the issuance by
OPTION GRANTOR and the acquisition by OPTION HOLDER of the OPTION GRANTOR Shares
hereunder shall have been obtained or made, including,  without limitation,  the
approval  of the SEC  under  Sections  9 and 10 of the  Public  Utility  Holding
Company Act of 1935,  as amended  (the "1935  Act"),  the approval of the Public
Service  Commission of Wisconsin of the issuance of the OPTION GRANTOR Shares by
OPTION GRANTOR and, if applicable,  the  acquisition of OPTION GRANTOR Shares by
OPTION  HOLDER,  and the approval of the Iowa  Utilities  Board,  the  Minnesota
Public  Utilities  Commission  and  the  Illinois  Commerce  Commission  of  the
acquisition  of the OPTION  GRANTOR  Shares by OPTION HOLDER and, if applicable,
the acquisition by OPTION GRANTOR of the OPTION HOLDER Shares  constituting  the
Exercise Price hereunder; and

                                     - 4 -

<PAGE>

                  (d) no preliminary  or permanent  injunction or other order by
any court of competent  jurisdiction  prohibiting or otherwise  restraining such
issuance shall be in effect.

The condition set forth in paragraph (b) above may be waived by OPTION  GRANTOR,
in the case of OPTION HOLDER Shares, and by OPTION HOLDER, in the case of OPTION
GRANTOR Shares, in the sole discretion of the waiving party.

                  4.  CLOSING.  At any Closing,

                  (a)  OPTION  GRANTOR  shall  deliver  to OPTION  HOLDER or its
designee a single  certificate  in definitive  form  representing  the number of
OPTION GRANTOR Shares  designated by OPTION HOLDER in its Exercise Notice,  such
certificate to be registered in the name of OPTION HOLDER and to bear the legend
set forth in Section 13; and

                  (b)  OPTION  HOLDER  shall  deliver  to  OPTION   GRANTOR  the
aggregate  price for the OPTION GRANTOR Shares so designated and being purchased
by

                           (i) wire transfer of immediately  available  funds or
         certified check or bank check, or

                           (ii) subject to the  condition  in Section  1(b)(ii),
         delivery of a certificate or  certificates  representing  the number of
         OPTION  HOLDER  Shares being issued by OPTION  HOLDER in  consideration
         thereof, determined in accordance with Section 4(c).

                  (c) In the event  that  OPTION  HOLDER  issues  OPTION  HOLDER
Shares to OPTION GRANTOR in  consideration  of OPTION GRANTOR Shares pursuant to
Section  4(b)(ii),  the number of OPTION  HOLDER Shares to be so issued shall be
equal to the quotient obtained by dividing:

                           (i) the  product of (x) the number of OPTION  GRANTOR
         Shares  with  respect  to which  the  OPTION  GRANTOR  Option  is being
         exercised and (y) the Exercise Price, by

                           (ii)  the Fair  Market  Value  of the  OPTION  HOLDER
         Shares  as of the date  immediately  preceding  the  date the  Exercise
         Notice is delivered to OPTION GRANTOR.

                  (d) OPTION  GRANTOR  shall pay all  expenses,  and any and all
Federal,  state  and  local  taxes  and other  charges  that may be  payable  in
connection with the preparation,  issue and delivery of stock certificates under
this Section 4.

                  5.  TRIGGER PAYMENT.

                  (a)  Trigger  Payment.  Subject to the  provisions  of Section
10.3(e) of the Merger Agreement,  if a Trigger Event shall have occurred and any
regulatory approval or

                                     - 5 -

<PAGE>

order required for the issuance by OPTION GRANTOR,  or the acquisition by OPTION
HOLDER, of the OPTION GRANTOR Option pursuant to Section 1 hereof shall not have
been obtained, OPTION HOLDER shall have the right to receive, and OPTION GRANTOR
shall pay to OPTION  HOLDER,  an amount  (the  "Trigger  Payment")  equal to the
product of

                           (i) the maximum  number of OPTION GRANTOR Shares that
         would have been subject to purchase by OPTION  HOLDER upon  exercise of
         the OPTION  GRANTOR  Option  pursuant to Sections 1 and 2 hereof if all
         such regulatory approvals or orders had been obtained, and

                           (ii)  the  difference  between  (A) the  Market/Offer
         Price (as defined herein), determined as of the date on which notice of
         demand for the Trigger  Payment is given by OPTION HOLDER,  and (B) the
         Exercise Price (but only if such Market/Offer Price is higher than such
         Exercise Price).

Demand for the Trigger  Payment shall be given by notice in accordance  with the
provisions  of Section 17 hereof.  The Trigger  Payment  shall be paid to OPTION
HOLDER by OPTION  GRANTOR  on the  Payment  Date (as  defined  herein),  by wire
transfer  of  immediately  available  funds to an  account to be  designated  in
writing by OPTION  HOLDER not less than two  business  days  before the  Payment
Date.

                  (b) Payment  Date.  For purposes of this  Section 5,  "Payment
Date" means the date on which termination fees are required to be paid by OPTION
GRANTOR to OPTION HOLDER under Sections 10.3(a) or 10.3(b),  as the case may be,
of the Merger  Agreement  as a result of the  occurrence  of the  Trigger  Event
referred to in subsection (a) of this Section 5.

                  (c)  Certain   Conditions.   OPTION   GRANTOR  shall  have  no
obligation to pay the Trigger  Payment if OPTION HOLDER is in material breach of
any of its  representations  or warranties,  or in material breach of any of its
covenants or agreements, contained in this Agreement or in the Merger Agreement.

                  6.  REPRESENTATIONS  AND WARRANTIES OF OPTION GRANTOR.  OPTION
GRANTOR represents and warrants to OPTION HOLDER that

                  (a)  Except  as  set  forth  in  Section  4.4(a)  of  the  WPL
Disclosure  Schedule to the Merger  Agreement,  OPTION GRANTOR has the corporate
power  and  authority  to  enter  into  this  Agreement  and to  carry  out  its
obligations  hereunder,  subject  in the case of the  repurchase  of the  OPTION
GRANTOR Shares  pursuant to Section 8(a) to applicable law and the provisions of
OPTION  GRANTOR's  Articles of  Incorporation,  as amended (the "OPTION  GRANTOR
Articles");

                  (b) this  Agreement  has been duly and  validly  executed  and
delivered by OPTION GRANTOR, and, assuming the due authorization,  execution and
delivery  hereof by OPTION  HOLDER and the  receipt of all  required  regulatory
approvals,  constitutes  a valid  and  binding  obligation  of  OPTION  GRANTOR,
enforceable  against OPTION GRANTOR in accordance with its terms,  except as may
be limited by applicable bankruptcy, insolvency,

                                     - 6 -

<PAGE>

reorganization  or other similar laws  affecting the  enforcement  of creditors'
rights  generally,  and except  that the  availability  of  equitable  remedies,
including  specific  performance,  may be subject to the discretion of any court
before which any proceeding therefor may be brought;

                  (c) OPTION GRANTOR has taken all necessary corporate action to
authorize  and reserve for issuance and to permit it to issue,  upon exercise of
the OPTION  GRANTOR  Option,  and at all times from the date hereof  through the
expiration of the OPTION GRANTOR  Option will have reserved,  the Initial Number
of authorized and unissued OPTION GRANTOR  Shares,  such amount being subject to
adjustment  as  provided in Section 12, all of which,  upon their  issuance  and
delivery  in  accordance  with  the  terms  of  this  Agreement,  will  be  duly
authorized,  validly issued,  fully paid and nonassessable  (except as otherwise
provided in Section 180.0622(2)(b) of the WBCL);

                  (d) upon  delivery  of the  OPTION  GRANTOR  Shares  to OPTION
HOLDER  upon the  exercise  of the OPTION  GRANTOR  Option,  OPTION  HOLDER will
acquire the OPTION GRANTOR Shares free and clear of all claims,  liens, charges,
encumbrances and security interests of any nature whatsoever;

                  (e)  except  as  described  in  Section   4.4(b)  of  the  WPL
Disclosure Schedule to the Merger Agreement,  the execution and delivery of this
Agreement by OPTION GRANTOR does not, and, subject to compliance with applicable
law and the OPTION GRANTOR Articles with respect to the repurchase of the OPTION
GRANTOR Shares  pursuant to Section 8(a), the  consummation by OPTION GRANTOR of
the transactions contemplated hereby will not, violate, conflict with, or result
in a breach of any provision of, or constitute a default (with or without notice
or a lapse  of time,  or both)  under,  or  result  in the  termination  of,  or
accelerate  the  performance  required by, or result in a right of  termination,
cancellation,  or  acceleration  of any  obligation  or the  loss of a  material
benefit under,  or the creation of a lien,  pledge,  security  interest or other
encumbrance  on  assets  (any  such  conflict,   violation,  default,  right  of
termination,  cancellation,   acceleration,  loss  or  creation,  hereinafter  a
"Violation") of OPTION GRANTOR or any of its Subsidiaries, pursuant to

                           (i) any provision of the OPTION  GRANTOR  Articles or
         the Bylaws of OPTION GRANTOR,

                           (ii) any  provisions  of any material  loan or credit
         agreement,  note,  mortgage,  indenture,  lease,  benefit plan or other
         agreement,  obligation,  instrument,  permit, concession,  franchise or
         license  (any of the  foregoing  in  effect  on the date  hereof  being
         referred  to  as a  "Material  Contract")  of  OPTION  GRANTOR  or  its
         subsidiaries or to which any of them is a party, or

                           (iii) any  judgment,  order,  decree,  statute,  law,
         ordinance,  rule or  regulation  applicable  to OPTION  GRANTOR  or its
         properties or assets,

which Violation, in the case of each clauses (ii) and (iii), could reasonably be
expected to have an OPTION  GRANTOR  Material  Adverse  Effect  (except  that no
representation or

                                     - 7 -

<PAGE>

warranty is given  concerning any Violation of a Material  Contract with respect
to the repurchase of OPTION GRANTOR Shares pursuant to Section 8(a));

                  (f)  except  as  described  in  Section   4.4(c)  of  the  WPL
Disclosure  Schedule  to the  Merger  Agreement  or  Section 1 or 3 hereof,  the
execution  and delivery of this  Agreement  by OPTION  GRANTOR does not, and the
performance of this  Agreement by OPTION GRANTOR will not,  require any consent,
approval,  authorization  or permit  of,  filing  with or  notification  to, any
Governmental Authority;

                  (g) none of OPTION  GRANTOR,  any of its  affiliates or anyone
acting on its or their  behalf,  has  issued,  sold or offered  any  security of
OPTION GRANTOR to any person under  circumstances  that would cause the issuance
and sale of OPTION GRANTOR Shares,  as  contemplated  by this  Agreement,  to be
subject to the  registration  requirements of the Securities Act as in effect on
the date hereof,  and,  assuming the  representations  and  warranties of OPTION
HOLDER  contained in Section 7(g) are true and correct,  the issuance,  sale and
delivery  of the  OPTION  GRANTOR  Shares  hereunder  would be  exempt  from the
registration and prospectus  delivery  requirements of the Securities Act, as in
effect on the date hereof (and OPTION  GRANTOR  shall not take any action  which
would cause the issuance,  sale, and delivery of OPTION GRANTOR Shares hereunder
not to be exempt from such requirements); and

                  (h)  any  OPTION  HOLDER  Shares  acquired  pursuant  to  this
Agreement  will be acquired for OPTION  GRANTOR's  own account,  for  investment
purposes  only,  and will not be acquired by OPTION  GRANTOR  with a view to the
public  distribution  thereof in  violation of any  applicable  provision of the
Securities Act.

                  7.  REPRESENTATIONS  AND WARRANTIES OF OPTION  HOLDER.  OPTION
HOLDER represents and warrants to OPTION GRANTOR that

                  (a) Except as set forth in Schedule  6.4(a) of the  Interstate
Disclosure  Schedule to the Merger  Agreement,  OPTION  HOLDER has the corporate
power  and  authority  to  enter  into  this  Agreement  and to  carry  out  its
obligations hereunder;

                  (b) this  Agreement  has been duly and  validly  executed  and
delivered by OPTION HOLDER and,  assuming the due  authorization,  execution and
delivery  hereof by OPTION  GRANTOR and the receipt of all  required  regulatory
approvals,  constitutes  a  valid  and  binding  obligation  of  OPTION  HOLDER,
enforceable  against  OPTION HOLDER in  accordance  with its  respective  terms,
except as may be limited by applicable bankruptcy,  insolvency,  reorganization,
or other similar laws affecting the enforcement of creditors'  rights generally,
and except that the  availability  of  equitable  remedies,  including  specific
performance,  may be subject to the  discretion  of any court  before  which any
proceeding may be brought;

                  (c)  prior  to  any  delivery  of  OPTION   HOLDER  Shares  in
consideration of the purchase of OPTION GRANTOR Shares pursuant  hereto,  OPTION
HOLDER will have taken all necessary  corporate action to authorize for issuance
and to permit it to issue such OPTION HOLDER  Shares,  all of which,  upon their
issuance and delivery in accordance with

                                     - 8 -

<PAGE>

the terms of this Agreement, will be duly authorized, validly issued, fully paid
and nonassessable;

                  (d) upon any delivery of such OPTION  HOLDER  Shares to OPTION
GRANTOR in  consideration  of the  purchase of OPTION  GRANTOR  Shares  pursuant
hereto,  OPTION  GRANTOR will acquire the OPTION HOLDER Shares free and clear of
all claims,  liens,  charges,  encumbrances and security interests of any nature
whatsoever;

                  (e) except as  described in Section  6.4(b) of the  Interstate
Disclosure Schedule to the Merger Agreement,  the execution and delivery of this
Agreement by OPTION  HOLDER does not, and the  consummation  by OPTION HOLDER of
the transactions contemplated hereby will not, violate, conflict with, or result
in the breach of any  provision  of, or  constitute  a default  (with or without
notice or a lapse of time, or both) under,  or result in any Violation by OPTION
HOLDER or any of its Subsidiaries, pursuant to

                           (i) any provision of the Articles of Incorporation or
         Bylaws of OPTION HOLDER,

                           (ii) any Material Contract of OPTION HOLDER or any of
         its subsidiaries or to which any of them is a party, or

                           (iii) any  judgment,  order,  decree,  statute,  law,
         ordinance,  rule or  regulation  applicable  to  OPTION  HOLDER  or its
         properties or assets,

which  Violation,  in the case of each of clauses  (ii) or (iii),  would have an
OPTION HOLDER Material Adverse Effect;

                  (f) except as  described in Section  6.4(c) of the  Interstate
Disclosure  Schedule  to the  Merger  Agreement  or  Section 1 or 3 hereof,  the
execution  and  delivery of this  Agreement  by OPTION  HOLDER does not, and the
consummation by OPTION HOLDER of the transactions  contemplated hereby will not,
require  any  consent,  approval,  authorization  or permit of,  filing  with or
notification to, any Governmental Authority; and

                  (g) any OPTION  GRANTOR  Shares  acquired upon exercise of the
OPTION  GRANTOR  Option will be acquired for OPTION  HOLDER's  own account,  for
investment  purposes only and will not be, and the OPTION  GRANTOR Option is not
being, acquired by OPTION HOLDER with a view to the public distribution thereof,
in violation of any applicable provision of the Securities Act.

                  8.  CERTAIN REPURCHASES.

                  (a) OPTION  HOLDER  "PUT".  At the request of OPTION HOLDER by
written  notice  (x) at any time  during  which  the  OPTION  GRANTOR  Option is
exercisable pursuant to Section 2 (the "Repurchase Period"),  OPTION GRANTOR (or
any successor  entity thereof) shall, if permitted by applicable law, the OPTION
GRANTOR Articles and Bylaws and OPTION GRANTOR's Material Contracts,  repurchase
from OPTION HOLDER

                                     - 9 -

<PAGE>

all or any  portion  of the  OPTION  GRANTOR  Option,  at the price set forth in
subparagraph (i) below, or, (y) at any time prior to May 10, 1997 (provided that
such date shall be extended to May 10,  1998 under the  circumstances  where the
date after which either party may  terminate  the Merger  Agreement  pursuant to
Section  10.1(b) of the Merger  Agreement  has been  extended to May 10,  1998),
OPTION  GRANTOR  (or any  successor  entity  thereof)  shall,  if  permitted  by
applicable  law, the OPTION  GRANTOR  Articles  and Bylaws and OPTION  GRANTOR's
Material  Contracts,  repurchase  from  OPTION  HOLDER all or any portion of the
OPTION GRANTOR Shares  purchased by OPTION HOLDER pursuant to the OPTION GRANTOR
Option, at the price set forth in subparagraph (ii) below:

                         (i) (A) The difference between the "Market/Offer Price"
         (as defined  below) for shares of OPTION GRANTOR Common Stock as of the
         date OPTION  HOLDER  gives  notice of its intent to exercise its rights
         under this Section 8 and the Exercise  Price,  multiplied by the number
         of OPTION  GRANTOR  Shares  purchasable  pursuant to the OPTION GRANTOR
         Option (or  portion  thereof  with  respect to which  OPTION  HOLDER is
         exercising   its  rights  under  this  Section  8),  but  only  if  the
         Market/Offer Price is greater than the Exercise Price.

                           (B) for  purposes  of this  Agreement,  "Market/Offer
         Price")  shall  mean,  as of any date,  the higher of (I) the price per
         share offered as of such date pursuant to any tender or exchange  offer
         or other offer with respect to a Business Combination  involving OPTION
         GRANTOR as the Target  Party  which was made prior to such date and not
         terminated  or withdrawn as of such date and (II) the Fair Market Value
         of OPTION GRANTOR Common Stock as of such date.

                        (ii) (A) the product of (I) the sum of (a) the  Exercise
         Price paid by OPTION HOLDER per OPTION GRANTOR Share acquired  pursuant
         to the OPTION GRANTOR Option, and (b) the difference between the "Offer
         Price" (as defined below) and the Exercise Price, but only if the offer
         Price is greater that the Exercise Price, and (II) the number of OPTION
         GRANTOR Shares so to be repurchased pursuant to this Section 8.

                           (B) For  purposes  of this  clause  (ii),  the "Offer
         Price"  shall be the  highest  price per share  offered  pursuant  to a
         tender or exchange offer or other Business  Combination offer involving
         OPTION GRANTOR as the Target Party during the  Repurchase  Period prior
         to the delivery by OPTION HOLDER of a notice of repurchase.

                  (b) REDELIVERY OF OPTION HOLDER SHARES. If OPTION HOLDER shall
have  previously  elected to  purchase  OPTION  GRANTOR  Shares  pursuant to the
exercise of the OPTION  GRANTOR  Option by the  issuance  and delivery of OPTION
HOLDER Shares,  then OPTION GRANTOR shall, if so requested by OPTION HOLDER,  in
fulfillment of its obligation pursuant to Section 8(a)(y) (that is, with respect
to the  Exercise  Price only and without  limitation  to its  obligation  to pay
additional consideration under clause (b) of Section 8(a)(ii)(A)(I)),  redeliver
the certificates for such OPTION HOLDER Shares to OPTION HOLDER,  free and clear
of all liens, claims, charges and encumbrances of any kind or nature whatsoever;
provided, however, that if at any time less than all of the

                                     - 10 -

<PAGE>

OPTION  GRANTOR  Shares so  purchased  by OPTION  HOLDER  pursuant to the OPTION
GRANTOR  Option are to be  repurchased  by OPTION  GRANTOR  pursuant  to Section
8(a)(y),  then (i) OPTION  GRANTOR  shall be  obligated  to  redeliver to OPTION
HOLDER the same  proportion of such OPTION HOLDER Shares as the number of OPTION
GRANTOR Shares that OPTION GRANTOR is then obligated to repurchase  bears to the
number of OPTION GRANTOR  Shares  acquired by OPTION HOLDER upon exercise of the
OPTION  GRANTOR  Option and (ii) OPTION HOLDER shall issue to OPTION GRANTOR new
certificates  representing  those OPTION  HOLDER  Shares which are not due to be
redelivered  to OPTION  HOLDER  pursuant to this Section 8(b) to the extent that
excess  OPTION  HOLDER Shares are included in the  certificates  redelivered  to
OPTION HOLDER by OPTION GRANTOR.

                  (c)  PAYMENT  AND  REDELIVERY  OF OPTION  GRANTOR  OPTIONS  OR
SHARES.  In the event OPTION  HOLDER  exercises its rights under this Section 8,
OPTION  GRANTOR  shall,  within ten business days  thereafter,  pay the required
amount to OPTION HOLDER in immediately  available  funds and OPTION HOLDER shall
surrender to OPTION  GRANTOR the OPTION  GRANTOR  Option or the  certificate  or
certificates  evidencing the OPTION  GRANTOR  Shares  purchased by OPTION HOLDER
pursuant hereto, and OPTION HOLDER shall warrant that it owns the OPTION GRANTOR
Option or such shares and that the OPTION GRANTOR Option or such shares are then
free and clear of all liens,  claims,  damages,  charges and encumbrances of any
kind or nature whatsoever.

                  (d) OPTION  HOLDER  "CALL".  If OPTION  HOLDER has  elected to
purchase  OPTION GRANTOR  Shares  pursuant to the exercise of the OPTION GRANTOR
Option by the  issuance and delivery of OPTION  HOLDER  Shares,  notwithstanding
that OPTION  HOLDER may no longer hold any such  OPTION  GRANTOR  Shares or that
OPTION  HOLDER  elects not to exercise  its other  rights  under this Section 8,
OPTION  HOLDER  may  require,  at any time or from time to time prior to May 10,
1997  (provided  that such date  shall be  extended  to May 10,  1998  under the
circumstances  where the date after which either party may  terminate the Merger
Agreement  pursuant to Section 10.1(b) of the Merger Agreement has been extended
to May 10, 1998), OPTION GRANTOR to sell to OPTION HOLDER any such OPTION HOLDER
Shares at the price  attributed to such OPTION HOLDER Shares pursuant to Section
4 plus  interest  at the rate of 8.75% per annum on such amount from the Closing
Date relating to the exchange of such OPTION HOLDER Shares pursuant to Section 4
to the Closing Date under this  Section  8(d) less any  dividends on such OPTION
HOLDER Shares paid during such period or declared and payable to stockholders of
record on a date during such period.

                  (e) REPURCHASE PRICE REDUCED AT OPTION HOLDER'S OPTION. In the
event the repurchase  price specified in Section 8(a) would subject the purchase
of the OPTION GRANTOR  Option or the OPTION  GRANTOR Shares  purchased by OPTION
HOLDER  pursuant to the OPTION GRANTOR Option to a vote of the  shareholders  of
OPTION GRANTOR pursuant to applicable law or the OPTION GRANTOR  Articles,  then
OPTION HOLDER may, at its  election,  reduce the  repurchase  price to an amount
which would permit such repurchase  without the necessity for such a shareholder
vote.

                                     - 11 -

<PAGE>

                  9.  VOTING OF SHARES.  Following  the date hereof and prior to
the fifth  anniversary of the date hereof (the  "Expiration  Date"),  each party
shall vote any shares of capital stock of the other party acquired by such party
pursuant to this Agreement  ("Restricted  Shares"),  including any OPTION HOLDER
Shares issued pursuant to Section 1(b), or otherwise  beneficially owned (within
the meaning of Rule 13d-3 promulgated under the Securities Exchange Act of 1934,
as amended (the "Exchange  Act")),  by such party on each matter  submitted to a
vote of shareholders of such other party for and against such matter in the same
proportion as the vote of all other  shareholders  of such other party are voted
(whether by proxy or otherwise) for and against such matter.

                  10. RESTRICTIONS ON TRANSFER.

                  (a)  RESTRICTIONS ON TRANSFER.  Prior to the Expiration  Date,
neither party shall,  directly or indirectly,  by operation of law or otherwise,
sell, assign,  pledge, or otherwise dispose of or transfer any Restricted Shares
beneficially  owned by such party, other than (i) pursuant to Section 8, or (ii)
in accordance with Section 10(b) or Section 11.

                  (b) PERMITTED  SALES.  Following the termination of the Merger
Agreement, a party shall be permitted to sell any Restricted Shares beneficially
owned by it if such sale is made pursuant to a tender or exchange offer that has
been approved or recommended,  or otherwise  determined to be fair to and in the
best  interests of the  shareholders  of the other  party,  by a majority of the
members of the Board of  Directors  of such other party,  which  majority  shall
include a majority of directors who were directors prior to the  announcement of
such tender or exchange offer.

                  11. REGISTRATION RIGHTS.

                  (a) Following the termination of the Merger Agreement,  either
party hereto that owns Restricted Shares (a "Designated  Holder") may by written
notice (the "Registration Notice") to the other party (the "Registrant") request
the  Registrant  to  register  under the  Securities  Act all or any part of the
Restricted Shares beneficially owned by such Designated Holder (the "Registrable
Securities")  pursuant  to a  bona  fide  firm  commitment  underwritten  public
offering,  in which the Designated  Holder and the underwriters  shall effect as
wide a distribution of such Registrable  Securities as is reasonably practicable
and shall use their best efforts to prevent any person  (including any Group (as
used in Rule 13d-5 under the Exchange Act)) and its affiliates  from  purchasing
through  such  offering  Restricted  Shares  representing  more  than  1% of the
outstanding shares of common stock of the Registrant on a fully diluted basis (a
"Permitted Offering").

                  (b)  The  Registration  Notice  shall  include  a  certificate
executed by the Designated Holder and its proposed managing  underwriter,  which
underwriter  shall  be an  investment  banking  firm  of  nationally  recognized
standing (the "Manager"), stating that

                           (i) they  have a good  faith  intention  to  commence
         promptly a Permitted Offering, and

                                     - 12 -

<PAGE>

                           (ii) the manager in good faith believes  that,  based
         on the then-prevailing  market conditions,  it will be able to sell the
         Registrable  Securities  at a per share  price equal to at least 80% of
         the then Fair Market Value of such shares.

                  (c)  The  Registrant  (and/or  any  person  designated  by the
Registrant)  shall  thereupon  have the option  exercisable  by  written  notice
delivered to the Designated Holder within ten business days after the receipt of
the Registration Notice, irrevocably to agree to purchase all or any part of the
Registrable  Securities  proposed to be so sold for cash at a price (the "Option
Price") equal to the product of (i) the number of  Registrable  Securities to be
so  purchased  by the  Registrant  and (ii) the then Fair  Market  Value of such
shares.

                  (d) Any purchase of  Registrable  Securities by the Registrant
(or its  designee)  under Section 11(c) shall take place at a closing to be held
at the principal  executive  offices of the  Registrant or at the offices of its
counsel at any reasonable date and time designated by the Registrant and/or such
designee in such  notice  within  twenty  business  days after  delivery of such
notice,  and any  payment  for the  shares to be so  purchased  shall be made by
delivery at the time of such closing in immediately available funds.

                  (e) If the  Registrant  does not elect to exercise  its option
pursuant to this Section 11 with respect to all Registrable Securities, it shall
use its best efforts to effect,  as promptly as  practicable,  the  registration
under the Securities Act of the unpurchased  Registrable  Securities proposed to
be so sold; provided, however, that

                           (i)  neither  party  shall be entitled to demand more
         than an aggregate of two effective  registration  statements hereunder,
         and

                           (ii) the Registrant  will not be required to file any
         such registration statement during any period of time (not to exceed 40
         days after  such  request in the case of clause (A) below or 90 days in
         the case of clauses (B) and (C) below) when

                                (A) the  Registrant is in possession of material
                  non-public  information which it reasonably  believes would be
                  detrimental  to be  disclosed at such time and, in the opinion
                  of  counsel  to the  Registrant,  such  information  would  be
                  required to be  disclosed  if a  registration  statement  were
                  filed at that time;

                                (B)  the   Registrant  is  required   under  the
                  Securities Act to include audited financial statements for any
                  period  in such  registration  statement  and  such  financial
                  statements  are  not  yet  available  for  inclusion  in  such
                  registration statement; or

                                (C) the Registrant determines, in its reasonable
                  judgment,  that such  registration  would  interfere  with any
                  financing, acquisition or other material transaction involving
                  the Registrant or any of its affiliates.

                  (f) The Registrant  shall use its  reasonable  best efforts to
cause any Registrable  Securities  registered  pursuant to this Section 11 to be
qualified for sale under the securities

                                     - 13 -

<PAGE>

or Blue Sky laws of such  jurisdictions as the Designated  Holder may reasonably
request and shall continue such  registration or qualification in effect in such
jurisdiction;  provided,  however,  that the Registrant shall not be required to
qualify to do  business  in, or consent  to general  service of process  in, any
jurisdiction by reason of this provision.

                  (g) The  registration  rights set forth in this Section 11 are
subject to the condition that the Designated Holder shall provide the Registrant
with such information with respect to such holder's Registrable Securities,  the
plans for the distribution  thereof,  and such other information with respect to
such holder as, in the  reasonable  judgment of counsel for the  Registrant,  is
necessary to enable the Registrant to include in such registration statement all
material  facts  required  to  be  disclosed  with  respect  to  a  registration
thereunder.

                  (h) A  registration  effected  under this  Section 11 shall be
effected at the  Registrant's  expense,  except for  underwriting  discounts and
commissions  and the fees and the expenses of counsel to the Designated  Holder,
and  the  Registrant  shall  provide  to  the  underwriters  such  documentation
(including  certificates,   opinions  of  counsel  and  "comfort"  letters  from
auditors) as is customary in connection with  underwritten  public  offerings as
such underwriters may reasonably require.

                           (i) In  connection  with  any  registration  effected
         under this Section 11, the parties agree

                           (i) to indemnify each other and the  underwriters  in
         the customary manner,

                           (ii) to enter into an underwriting  agreement in form
         and substance  customary for transactions of such type with the Manager
         and the other underwriters participating in such offering, and

                          (iii)  to take  all  further  actions  which  shall be
         reasonably necessary to effect such registration and sale (including if
         the   Manager   deems  it   necessary,   participating   in   road-show
         presentations).

                  (j) The  Registrant  shall  be  entitled  to  include  (at its
expense)  additional  shares  of its  common  stock in a  registration  effected
pursuant  to this  Section 11 only if and to the extent the  Manager  determines
that such inclusion will not adversely  affect the prospects for success of such
offering.

                  12.  ADJUSTMENT  UPON  CHANGES  IN   CAPITALIZATION.   Without
limitation to any  restriction on OPTION GRANTOR  contained in this Agreement or
in the Merger  Agreement,  in the event of any change in OPTION  GRANTOR  Common
Stock by reason of stock dividends,  splitups,  mergers (other than the Merger),
recapitalizations,  combinations,  exchange of shares or the like,  the type and
number of shares or securities  subject to the OPTION  GRANTOR  Option,  and the
purchase price per share provided in Section 1, shall be adjusted  appropriately
to  restore  to OPTION  HOLDER  its  rights  hereunder,  including  the right to
purchase from OPTION GRANTOR (or its successors) shares of OPTION GRANTOR Common
Stock (or such other shares or securities into which

                                     - 14 -

<PAGE>

OPTION GRANTOR Common Stock has been so changed)  representing the Option Shares
Percentage of the Initial  Number of shares of OPTION  GRANTOR  Common Stock for
the aggregate  Exercise  Price  calculated  as of the date of this  Agreement as
provided in Section 1.

                  13. RESTRICTIVE LEGENDS. Each certificate  representing OPTION
GRANTOR Shares issued to OPTION HOLDER  hereunder,  and OPTION HOLDER Shares, if
any,  delivered  to  OPTION  GRANTOR  at a  Closing,  shall  include a legend in
substantially the following form:

         THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED
         UNDER THE SECURITIES ACT OF 1933, AS AMENDED,  OR ANY STATE  SECURITIES
         OR BLUE SKY LAWS, AND MAY BE REOFFERED OR SOLD ONLY IF SO REGISTERED OR
         IF AN EXEMPTION FROM SUCH  REGISTRATION  IS AVAILABLE.  SUCH SECURITIES
         ARE ALSO SUBJECT TO ADDITIONAL RESTRICTIONS ON TRANSFER AS SET FORTH IN
         THE OPTION HOLDER STOCK OPTION AND TRIGGER PAYMENT AGREEMENT,  DATED AS
         OF NOVEMBER 10,  1995, A COPY OF WHICH MAY BE OBTAINED  FROM THE ISSUER
         UPON REQUEST.

It is understood and agreed that:

                           (i) the reference to the resale  restrictions  of the
         Securities  Act and  state  securities  or Blue Sky  laws in the  above
         legend  shall be  removed  by  delivery  of  substitute  certificate(s)
         without such reference if OPTION HOLDER or OPTION GRANTOR,  as the case
         may be, shall have delivered to the other party a copy of a letter from
         the staff of the SEC, or an opinion of counsel,  in form and  substance
         satisfactory  to the other party, to the effect that such legend is not
         required for purposes of the Securities Act or such laws;

                           (ii)  the   reference  to  the   provisions  to  this
         Agreement  in  the  above  legend  shall  be  removed  by  delivery  of
         substitute  certificate(s)  without  such  reference if the shares have
         been sold or  transferred  in  compliance  with the  provisions of this
         Agreement and under  circumstances that do not require the retention of
         such reference; and

                           (iii) the legend  shall be removed in its entirety if
         the  conditions  in  the  preceding  clauses  (i)  and  (ii)  are  both
         satisfied.

In addition, such certificates shall bear any other legend as may be required by
law.  Certificates  representing  shares sold in a  registered  public  offering
pursuant  to  Section 11 shall not be  required  to bear the legend set forth in
this Section 13.

                  14.   BINDING   EFFECT;   NO   ASSIGNMENT;   NO  THIRD   PARTY
BENEFICIARIES. (a) This Agreement shall be binding upon and inure to the benefit
of the parties hereto and their respective successors and permitted assigns.

                                     - 15 -

<PAGE>

                  (b)  Except  as  expressly  provided  for in  this  Agreement,
neither this  Agreement nor the rights or obligations of either party hereto are
assignable, except by operation of law, or with the written consent of the other
party.

                  (c) Nothing  contained in this Agreement,  express or implied,
is intended to confer  upon any person  other than the parties  hereto and their
respective  permitted assigns any rights or remedies of any nature whatsoever by
reason of this Agreement.

                  (d) Any Restricted  Shares sold by a party in compliance  with
the provisions of Section 11 shall,  upon  consummation of such sale, be free of
the restrictions  imposed with respect to such shares by this Agreement,  unless
and until such party shall  repurchase or otherwise  become the beneficial owner
of such shares,  and any  transferee of such shares shall not be entitled to the
registration rights of such party.

                  15.  SPECIFIC  PERFORMANCE.  The  parties  hereto  agree  that
irreparable  harm would  occur in the event that any of the  provisions  of this
Agreement were not performed in accordance  with their  specified  terms or were
otherwise  breached.  It is accordingly  agreed that the parties hereto shall be
entitled to an injunction or injunctions  to prevent  breaches of this Agreement
and to enforce  specifically the terms and provisions hereof in any court of the
United  States or any state having  jurisdiction,  this being in addition to any
other remedy to which they are entitled at law or equity.

                  16. VALIDITY.  (a) The invalidity or  unenforceability  of any
provision of this Agreement shall not affect the validity or  enforceability  of
the other  provisions  of this  Agreement,  which shall remain in full force and
effect.

                  (b) In the event any court or other competent  authority holds
any provisions of this Agreement to be null, void or unenforceable,  the parties
hereto shall  negotiate in good faith the execution and delivery of an amendment
to this Agreement in order, as nearly as possible, to effectuate,  to the extent
permitted  by law,  the  intent  of the  parties  hereto  with  respect  to such
provision and the economic effects thereof.

                  (c)  Subject to Section 5, if for any reason any such court or
regulatory agency determines that OPTION HOLDER is not permitted to acquire,  or
OPTION  GRANTOR is not permitted to  repurchase  pursuant to Section 8, the full
number of shares of OPTION GRANTOR Common Stock provided in Section 1 hereof (as
the same may be  adjusted),  it is the express  intention  of OPTION  GRANTOR to
allow OPTION HOLDER to acquire or to require OPTION  GRANTOR to repurchase  such
lesser  number  of  shares  as may  be  permissible  without  any  amendment  or
modification hereof.

                  (d)  Each  party  agrees  that,  should  any  court  or  other
competent  authority  hold any provision of this  Agreement or part hereof to be
null, void or unenforceable,  or order any party to take any action inconsistent
herewith,  or not take any action required herein,  the other party shall not be
entitled  to specific  performance  of such  provision  or part hereof or to any
other remedy,  including but not limited to money damages,  for breach hereof or
of any other  provision  of this  Agreement or part hereof as the result of such
holding or order.

                                     - 16 -

<PAGE>

                  17. NOTICES.  All notices and other  communications  hereunder
shall be in writing and shall be deemed given if (a)  delivered  personally,  or
(b) if sent by overnight courier service (receipt confirmed in writing),  or (c)
if delivered by facsimile  transmission  (with receipt  confirmed),  or (d) five
days  after  being  mailed by  registered  or  certified  mail  (return  receipt
requested)  to the parties in each case to the  following  addresses (or at such
other address for a party as shall be specified by like notice):

                  A.       If to OPTION HOLDER, to:

                           Interstate Power Company
                           1000 Main Street
                           Dubuque, Iowa 52004-0789

                           Attention:  Wayne H. Stoppelmoor
                                       Chairman
                           Fax:  (319) 557-2202


                           with a copy to:

                           Milbank, Tweed, Hadley & McCloy
                           1 Chase Manhattan Plaza
                           New York, New York  10005-1413

                           Attention:  John T. O'Connor, Esq.
                           Fax:  (212) 530-5219


                  B.       If to OPTION GRANTOR, to:

                           WPL Holdings, Inc.
                           222 West Washington Avenue
                           Madison, Wisconsin 53703

                           Attention:  Erroll B. Davis, Jr.
                           Fax:  (608) 252-3137


                           with a copy to:

                           Foley & Lardner
                           777 East Wisconsin Avenue
                           Milwaukee, Wisconsin  53202-5367

                           Attention:  Benjamin F. Garmer, III, Esq.
                           Fax:  (414) 297-4900



                                     - 17 -

<PAGE>

                  18.  GOVERNING  LAW. This  Agreement  shall be governed by and
construed in  accordance  with the laws of the State of Delaware  applicable  to
agreements  made and to be  performed  entirely  within  such State and  without
regard to its choice of law principles or to any  requirement as to jurisdiction
or service of process contained in Section 2708 of Title 6 of the Delaware Code.

                  19. INTERPRETATION.

                  (a) When  reference  is made in this  Agreement  to  Articles,
Sections or Exhibits, such reference shall be to an Article,  Section or Exhibit
of this Agreement, as the case may be, unless otherwise indicated.

                  (b) The  table of  contents  and  headings  contained  in this
Agreement are for reference purposes and shall not affect in any way the meaning
or interpretation of the Agreement.

                  (c) Whenever the words  "include,"  "includes," or "including"
are used in this  Agreement,  they shall be deemed to be  followed  by the words
"without limitation."

                  (d)  Whenever  "or"  is used in this  Agreement  it  shall  be
construed in the nonexclusive sense.

                  20.  COUNTERPARTS;  EFFECT.  This Agreement may be executed in
one or more counterparts,  each of which shall be deemed to be an original,  but
all of which shall constitute one and the same agreement.

                  21. AMENDMENTS;  WAIVER.  This Agreement may be amended by the
parties  hereto and the terms and  conditions  hereof  may be waived  only by an
instrument in writing signed on behalf of each of the parties hereto, or, in the
case of a waiver,  by an  instrument  signed  on  behalf  of the  party  waiving
compliance.

                  22. EXTENSION OF TIME PERIODS.  The time periods for exercises
of certain  rights under  Sections 2, 7 and 8 shall be extended (but in no event
by more than six months):

                  (a) to the extent necessary to obtain all regulatory approvals
for the exercise of such rights, and for the expiration of all statutory waiting
periods; and

                  (b) to the  extent  necessary  to avoid  any  liability  under
Section 16(b) of the Exchange Act by reason of such exercise.



                      THIS SPACE INTENTIONALLY LEFT BLANK





                                     - 18 -

<PAGE>

                  IN WITNESS  WHEREOF,  the  parties  hereto  have  caused  this
Agreement to be executed by their respective duly authorized  officers as of the
date first above written.

                                           WPL HOLDINGS, INC.


                                           By:/s/ ERROLL B. DAVIS, JR.
                                              ------------------------
                                              Name:   Erroll B. Davis, Jr.
                                              Title:  President and Chief
                                                       Executive Officer

                                            INTERSTATE POWER COMPANY


                                            By:/s/ WAYNE H. STOPPELMOOR
                                               ------------------------
                                               Name:   Wayne H. Stoppelmoor
                                               Title:  President, Chief
                                                        Executive Officer and
                                                        Chairman of the Board


                                     - 19 -

<PAGE>

                                                                       EXHIBIT C


                   OPTION GRANTOR/OPTION HOLDER STOCK OPTION
                         AND TRIGGER PAYMENT AGREEMENT


                  This STOCK  OPTION  AGREEMENT,  dated as of November  10, 1995
(the  "Agreement")  by and among IES  Industries  Inc., a corporation  organized
under the laws of the State of Iowa ("OPTION  GRANTOR" or the "Company") and WPL
Holdings, Inc., a corporation organized under the laws of the State of Wisconsin
("OPTION HOLDER").

                          W I T N E S S E T H   T H A T:

                  WHEREAS,  concurrently with the execution and delivery of this
Agreement,   OPTION  GRANTOR,   OPTION  HOLDER,   Interstate  Power  Company,  a
corporation  organized  under the laws of the State of Delaware  ("Interstate"),
and AMW Acquisition,  Inc., a wholly-owned subsidiary of OPTION HOLDER organized
under the laws of the State of Delaware ("AMW"),  are entering into an Agreement
and Plan of Merger,  dated as of November  10, 1995,  (the "Merger  Agreement"),
which  provides,  inter  alia,  upon the terms  and  subject  to the  conditions
thereof,  for the  merger  of  OPTION  GRANTOR  with and into  OPTION  HOLDER in
accordance with the laws of the States of Wisconsin and Iowa (the "IES Merger"),
and the merger of AMW with and into  Interstate in  accordance  with the laws of
the State of  Delaware  (the  "Interstate  Merger",  and  together  with the IES
Merger, the "Merger");

                  WHEREAS,  in  connection  with  the  execution  of the  Merger
Agreement,  OPTION  GRANTOR,  OPTION  HOLDER and  Interstate  are entering  into
certain  stock  option  agreements  dated as of the date  hereof,  of which this
Agreement  is one,  whereby the parties  hereto  grant each other an option with
respect to certain  shares of each other's common stock on the terms and subject
to the conditions set forth therein (the "Stock Option Agreements"); and

                  WHEREAS,  as a condition  to OPTION  HOLDER's  willingness  to
enter into the Merger Agreement, OPTION HOLDER has requested that OPTION GRANTOR
agree,  and OPTION  GRANTOR has so agreed,  to grant to OPTION  HOLDER an option
with respect to certain shares of OPTION  GRANTOR's  common stock,  on the terms
and subject to the conditions set forth herein;

                  NOW,  THEREFORE,  to induce  OPTION  HOLDER to enter  into the
Merger   Agreement  and  certain  of  the  Stock  Option   Agreements,   and  in
consideration  of the  representations,  warranties,  covenants  and  agreements
contained  herein, in the Merger Agreement and in the Stock Option Agreements to
which  OPTION  GRANTOR  and  OPTION  HOLDER are  parties,  the  parties  hereto,
intending to be legally bound, hereby agree as follows:

<PAGE>

                  1. GRANT OF OPTION.

                  (a) Subject to the  receipt of all  regulatory  approvals  and
orders  required  by OPTION  GRANTOR as set forth in  Section  5.4(c) of the IES
Disclosure Schedule to the Merger Agreement and by OPTION HOLDER as set forth in
Section 4.4(c) of the WPL Disclosure  Schedule to the Merger  Agreement,  OPTION
GRANTOR hereby grants OPTION HOLDER an irrevocable  option (the "OPTION  GRANTOR
Option")  to  purchase up to that  number of shares,  subject to  adjustment  as
provided in Section 12 (the "OPTION  GRANTOR  Shares"),  of common stock, no par
value,  of  OPTION  GRANTOR  (the  "OPTION  GRANTOR  Common  Stock")  equal to a
percentage (the "Option Shares  Percentage"),  which Option Shares Percentage is
equal to the  OPTION  HOLDER's  Participation  Percentage  as  defined  below in
subsection (e), of 5,861,115  shares of OPTION GRANTOR Common Stock (being 19.9%
of the number of shares of OPTION GRANTOR Common Stock issued and outstanding as
of November 10, 1995, the "Initial  Number") in the manner set forth below, at a
price (the  "Exercise  Price") per OPTION  GRANTOR  Share of $26.7125  (which is
equal to the Fair Market Value (as defined  below) of a OPTION  GRANTOR Share as
of the date hereof).

                  (b) The Exercise  Price shall be payable,  at OPTION  HOLDER's
option, as follows:

                           (i)   in cash, or

                           (ii)  subject to the receipt of all  approvals of any
         Governmental  Authority  required  for OPTION  GRANTOR to acquire,  and
         OPTION HOLDER to issue,  the OPTION  HOLDER  Shares (as defined  below)
         from  OPTION  HOLDER,  in shares of common  stock,  $.01 par value,  of
         OPTION HOLDER ("OPTION HOLDER Shares"),

in either case in accordance with Section 4 hereof.

                  (c)  Notwithstanding  the  foregoing,  in no event  shall  the
number  of  OPTION  GRANTOR  Shares  for  which  the  OPTION  GRANTOR  Option is
exercisable  exceed the product of the Option Shares  Percentage and the Initial
Number, subject to adjustment as provided in Section 12.

                  (d) As used herein, the "Fair Market Value" of any share shall
be the average of the daily  closing  sales price for such share on the New York
Stock  Exchange (the "NYSE") during the ten NYSE trading days prior to the fifth
NYSE trading day preceding the date such Fair Market Value is to be determined.

                  (e) For  purposes of this  Agreement  the term  "Participation
Percentage"  shall have the same meaning as in Section  10.3(f)(i) of the Merger
Agreement,  except that the numerator and denominator  shall be calculated based
on the number of shares of WPL Common Stock which would be issuable  (or, in the
case of WPL,  retained by its  shareholders)  on a fully  diluted  basis had the
Effective Time occurred as of the date on which the Exercise Notice is delivered
under Section 2 hereof or the date on which demand

                                     - 2 -

<PAGE>

for the Trigger Payment (as defined herein) is given under Section 5 hereof,  as
the case may be.  Other  capitalized  terms used herein but not  defined  herein
shall have the meanings set forth in the Merger Agreement.

                  2. EXERCISE OF OPTION.

                  (a) The  OPTION  GRANTOR  Option  may be  exercised  by OPTION
HOLDER,  in whole or in part,  at any time or from time to time after the Merger
Agreement becomes  terminable by OPTION HOLDER under  circumstances  which could
entitle OPTION HOLDER to a termination  fee under Section  10.3(a) of the Merger
Agreement  (provided that the events specified in Section  10.3(a)(ii)(A) of the
Merger  Agreement shall have occurred,  although the events specified in Section
10.3(a)(ii)(B) thereof need not have occurred), or Section 10.3(b) of the Merger
Agreement  (regardless of whether the Merger Agreement is actually terminated or
whether  there occurs a closing of any Business  Combination  involving a Target
Party or a closing by which a Target Party becomes a Subsidiary), any such event
by which the Merger  Agreement  becomes so  terminable  by OPTION  HOLDER  being
referred to herein as a "Trigger Event").

                  (b) (i) OPTION GRANTOR shall notify OPTION HOLDER  promptly in
         writing of the  occurrence of any Trigger  Event,  it being  understood
         that the  giving  of such  notice  by  OPTION  GRANTOR  shall  not be a
         condition to the right of OPTION HOLDER to exercise the OPTION  GRANTOR
         Option.

                           (ii) In the event  OPTION  HOLDER  wishes to exercise
         the  OPTION  GRANTOR  Option,  OPTION  HOLDER  shall  deliver to OPTION
         GRANTOR  written  notice (an "Exercise  Notice")  specifying  the total
         number of OPTION GRANTOR Shares it wishes to purchase.

                           (iii)  Upon the  giving  by  OPTION  HOLDER to OPTION
         GRANTOR  of the  Exercise  Notice  and  the  tender  of the  applicable
         aggregate Exercise Price, OPTION HOLDER, to the extent permitted by law
         and OPTION GRANTOR's  organizational  documents,  and provided that the
         conditions to OPTION  GRANTOR's  obligation to issue the OPTION GRANTOR
         Shares  to OPTION  HOLDER  hereunder  set forth in  Section 3 have been
         satisfied or waived,  shall be deemed to be the holder of record of the
         OPTION GRANTOR Shares issuable upon such exercise, notwithstanding that
         the stock transfer books of OPTION GRANTOR shall then be closed or that
         certificates  representing such OPTION GRANTOR Shares shall not then be
         actually delivered to OPTION HOLDER.

                           (iv) Each  closing  of a purchase  of OPTION  GRANTOR
         Shares (a "Closing")  shall occur at a place,  on a date, and at a time
         designated  by OPTION HOLDER in an Exercise  Notice  delivered at least
         two business days prior to the date of the Closing.

                  (c)  The  OPTION  GRANTOR  Option  shall  terminate  upon  the
earliest to occur of:

                                     - 3 -

<PAGE>

                           (i)  the Effective Time of the Merger;

                           (ii) the termination of the Merger Agreement pursuant
         to Section  10.1  thereof,  other than under  circumstances  which also
         constitute a Trigger Event under this Agreement;

                           (iii)  180  days  following  any  termination  of the
         Merger  Agreement upon or during the continuance of a Trigger Event (or
         if, at the expiration of such 180 day period, the OPTION GRANTOR Option
         cannot  be  exercised  by reason of any  applicable  judgment,  decree,
         order,  law or regulation,  ten business days after such  impediment to
         exercise  shall have been  removed or shall have  become  final and not
         subject to appeal,  but in no event under this clause  (iii) later than
         May 10, 1998); and

                           (iv) payment by OPTION GRANTOR of the Trigger Payment
         set forth in Section 5 of this Agreement to OPTION HOLDER.

                  (d) Notwithstanding  the foregoing,  the OPTION GRANTOR Option
may not be  exercised if (i) OPTION  HOLDER is in material  breach of any of its
representations or warranties,  or in material breach of any of its covenants or
agreements,  contained in this Agreement or in the Merger  Agreement,  or (ii) a
Trigger  Payment has been paid pursuant to Section 5 of this Agreement or demand
therefor has been made and not withdrawn.

                  3. CONDITIONS TO CLOSING.  The obligation of OPTION GRANTOR to
issue the OPTION  GRANTOR  Shares to OPTION  HOLDER  hereunder is subject to the
conditions that

                  (a) all waiting periods,  if any, under the HSR Act applicable
to the issuance and  acquisition of the OPTION GRANTOR  Shares  hereunder  shall
have expired or have been terminated;

                  (b) the OPTION  GRANTOR  Shares,  and any OPTION HOLDER Shares
which are issued in payment of the Exercise Price,  shall have been approved for
listing on the NYSE subject only to official notice of issuance;

                  (c) all consents,  approvals,  orders or authorizations of, or
registrations,  declarations  or  filings  with,  any  federal,  state  or local
administrative   agency  or  commission  or  other   federal,   state  or  local
Governmental  Authority,  if any,  required in  connection  with the issuance by
OPTION GRANTOR and the acquisition by OPTION HOLDER of the OPTION GRANTOR Shares
hereunder shall have been obtained or made, including,  without limitation,  the
approval  of the SEC  under  Sections  9 and 10 of the  Public  Utility  Holding
Company  Act of 1935,  as amended  (the "1935  Act"),  the  approval of the Iowa
Utilities  Board of the issuance of the OPTION  GRANTOR Shares by OPTION GRANTOR
and, if applicable,  the  acquisition of OPTION GRANTOR Shares by OPTION HOLDER,
and  the  approval  of  the  Public  Service  Commission  of  Wisconsin  of  the
acquisition  of the OPTION  GRANTOR  Shares by OPTION HOLDER and, if applicable,
the acquisition by OPTION GRANTOR of the OPTION HOLDER Shares  constituting  the
Exercise Price hereunder; and

                                     - 4 -

<PAGE>

                  (d) no preliminary  or permanent  injunction or other order by
any court of competent  jurisdiction  prohibiting or otherwise  restraining such
issuance shall be in effect.

The condition set forth in paragraph (b) above may be waived by OPTION  GRANTOR,
in the case of OPTION HOLDER Shares, and by OPTION HOLDER, in the case of OPTION
GRANTOR Shares, in the sole discretion of the waiving party.

                  4. CLOSING. At any Closing,

                  (a)  OPTION  GRANTOR  shall  deliver  to OPTION  HOLDER or its
designee a single  certificate  in definitive  form  representing  the number of
OPTION GRANTOR Shares  designated by OPTION HOLDER in its Exercise Notice,  such
certificate to be registered in the name of OPTION HOLDER and to bear the legend
set forth in Section 13; and

                  (b)  OPTION  HOLDER  shall  deliver  to  OPTION   GRANTOR  the
aggregate  price for the OPTION GRANTOR Shares so designated and being purchased
by

                           (i) wire transfer of immediately  available  funds or
         certified check or bank check, or

                           (ii) subject to the  condition  in Section  1(b)(ii),
         delivery of a certificate or  certificates  representing  the number of
         OPTION  HOLDER  Shares being issued by OPTION  HOLDER in  consideration
         thereof, determined in accordance with Section 4(c).

                  (c) In the event  that  OPTION  HOLDER  issues  OPTION  HOLDER
Shares to OPTION GRANTOR in  consideration  of OPTION GRANTOR Shares pursuant to
Section  4(b)(ii),  the number of OPTION  HOLDER Shares to be so issued shall be
equal to the quotient obtained by dividing:

                           (i) the  product of (x) the number of OPTION  GRANTOR
         Shares  with  respect  to which  the  OPTION  GRANTOR  Option  is being
         exercised and (y) the Exercise Price, by

                           (ii)  the Fair  Market  Value  of the  OPTION  HOLDER
         Shares  as of the date  immediately  preceding  the  date the  Exercise
         Notice is delivered to OPTION GRANTOR.

                  (d) OPTION  GRANTOR  shall pay all  expenses,  and any and all
Federal,  state  and  local  taxes  and other  charges  that may be  payable  in
connection with the preparation,  issue and delivery of stock certificates under
this Section 4.

                  5.  TRIGGER PAYMENT.

                  (a)  Trigger  Payment.  Subject to the  provisions  of Section
10.3(e) of the Merger Agreement,  if a Trigger Event shall have occurred and any
regulatory approval or

                                     - 5 -

<PAGE>

order required for the issuance by OPTION GRANTOR,  or the acquisition by OPTION
HOLDER, of the OPTION GRANTOR Option pursuant to Section 1 hereof shall not have
been obtained, OPTION HOLDER shall have the right to receive, and OPTION GRANTOR
shall pay to OPTION  HOLDER,  an amount  (the  "Trigger  Payment")  equal to the
product of

                           (i) the maximum  number of OPTION GRANTOR Shares that
         would have been subject to purchase by OPTION  HOLDER upon  exercise of
         the OPTION  GRANTOR  Option  pursuant to Sections 1 and 2 hereof if all
         such regulatory approvals or orders had been obtained, and

                           (ii)  the  difference  between  (A) the  Market/Offer
         Price (as defined herein), determined as of the date on which notice of
         demand for the Trigger  Payment is given by OPTION HOLDER,  and (B) the
         Exercise Price (but only if such Market/Offer Price is higher than such
         Exercise Price).

Demand for the Trigger  Payment shall be given by notice in accordance  with the
provisions  of Section 17 hereof.  The Trigger  Payment  shall be paid to OPTION
HOLDER by OPTION  GRANTOR  on the  Payment  Date (as  defined  herein),  by wire
transfer  of  immediately  available  funds to an  account to be  designated  in
writing by OPTION  HOLDER not less than two  business  days  before the  Payment
Date.

                  (b) Payment  Date.  For purposes of this  Section 5,  "Payment
Date" means the date on which termination fees are required to be paid by OPTION
GRANTOR to OPTION HOLDER under Sections 10.3(a) or 10.3(b),  as the case may be,
of the Merger  Agreement  as a result of the  occurrence  of the  Trigger  Event
referred to in subsection (a) of this Section 5.

                  (c)  Certain   Conditions.   OPTION   GRANTOR  shall  have  no
obligation to pay the Trigger  Payment if OPTION HOLDER is in material breach of
any of its  representations  or warranties,  or in material breach of any of its
covenants or agreements, contained in this Agreement or in the Merger Agreement.

                  6.  REPRESENTATIONS  AND WARRANTIES OF OPTION GRANTOR.  OPTION
GRANTOR represents and warrants to OPTION HOLDER that

                  (a)  Except  as  set  forth  in  Section  5.4(a)  of  the  IES
Disclosure  Schedule to the Merger  Agreement,  OPTION GRANTOR has the corporate
power  and  authority  to  enter  into  this  Agreement  and to  carry  out  its
obligations  hereunder,  subject  in the case of the  repurchase  of the  OPTION
GRANTOR Shares  pursuant to Section 8(a) to applicable law and the provisions of
OPTION  GRANTOR's  Articles of  Incorporation,  as amended (the "OPTION  GRANTOR
Articles");

                  (b) this  Agreement  has been duly and  validly  executed  and
delivered by OPTION GRANTOR, and, assuming the due authorization,  execution and
delivery  hereof by OPTION  HOLDER and the  receipt of all  required  regulatory
approvals,  constitutes  a valid  and  binding  obligation  of  OPTION  GRANTOR,
enforceable  against OPTION GRANTOR in accordance with its terms,  except as may
be limited by applicable bankruptcy, insolvency,

                                     - 6 -

<PAGE>

reorganization  or other similar laws  affecting the  enforcement  of creditors'
rights  generally,  and except  that the  availability  of  equitable  remedies,
including  specific  performance,  may be subject to the discretion of any court
before which any proceeding therefor may be brought;

                  (c) OPTION GRANTOR has taken all necessary corporate action to
authorize  and reserve for issuance and to permit it to issue,  upon exercise of
the OPTION  GRANTOR  Option,  and at all times from the date hereof  through the
expiration of the OPTION GRANTOR  Option will have reserved,  the Initial Number
of authorized and unissued OPTION GRANTOR  Shares,  such amount being subject to
adjustment  as  provided in Section 12, all of which,  upon their  issuance  and
delivery  in  accordance  with  the  terms  of  this  Agreement,  will  be  duly
authorized, validly issued, fully paid and nonassessable;

                  (d) upon  delivery  of the  OPTION  GRANTOR  Shares  to OPTION
HOLDER  upon the  exercise  of the OPTION  GRANTOR  Option,  OPTION  HOLDER will
acquire the OPTION GRANTOR Shares free and clear of all claims,  liens, charges,
encumbrances and security interests of any nature whatsoever;

                  (e)  except  as  described  in  Section   5.4(b)  of  the  IES
Disclosure Schedule to the Merger Agreement,  the execution and delivery of this
Agreement by OPTION GRANTOR does not, and, subject to compliance with applicable
law and the OPTION GRANTOR Articles with respect to the repurchase of the OPTION
GRANTOR Shares  pursuant to Section 8(a), the  consummation by OPTION GRANTOR of
the transactions contemplated hereby will not, violate, conflict with, or result
in a breach of any provision of, or constitute a default (with or without notice
or a lapse  of time,  or both)  under,  or  result  in the  termination  of,  or
accelerate  the  performance  required by, or result in a right of  termination,
cancellation,  or  acceleration  of any  obligation  or the  loss of a  material
benefit under,  or the creation of a lien,  pledge,  security  interest or other
encumbrance  on  assets  (any  such  conflict,   violation,  default,  right  of
termination,  cancellation,   acceleration,  loss  or  creation,  hereinafter  a
"Violation") of OPTION GRANTOR or any of its Subsidiaries, pursuant to

                           (i) any provision of the OPTION  GRANTOR  Articles or
         the Bylaws of OPTION GRANTOR,

                           (ii) any  provisions  of any material  loan or credit
         agreement,  note,  mortgage,  indenture,  lease,  benefit plan or other
         agreement,  obligation,  instrument,  permit, concession,  franchise or
         license  (any of the  foregoing  in  effect  on the date  hereof  being
         referred  to  as a  "Material  Contract")  of  OPTION  GRANTOR  or  its
         subsidiaries or to which any of them is a party, or

                           (iii) any  judgment,  order,  decree,  statute,  law,
         ordinance,  rule or  regulation  applicable  to OPTION  GRANTOR  or its
         properties or assets,

which Violation, in the case of each clauses (ii) and (iii), could reasonably be
expected to have an OPTION  GRANTOR  Material  Adverse  Effect  (except  that no
representation  or  warranty is given  concerning  any  Violation  of a Material
Contract with respect to the  repurchase of OPTION  GRANTOR  Shares  pursuant to
Section 8(a));

                                     - 7 -

<PAGE>

                  (f)  except  as  described  in  Section   5.4(c)  of  the  IES
Disclosure  Schedule  to the  Merger  Agreement  or  Section 1 or 3 hereof,  the
execution  and delivery of this  Agreement  by OPTION  GRANTOR does not, and the
performance of this  Agreement by OPTION GRANTOR will not,  require any consent,
approval,  authorization  or permit  of,  filing  with or  notification  to, any
Governmental Authority;

                  (g) none of OPTION  GRANTOR,  any of its  affiliates or anyone
acting on its or their  behalf,  has  issued,  sold or offered  any  security of
OPTION GRANTOR to any person under  circumstances  that would cause the issuance
and sale of OPTION GRANTOR Shares,  as  contemplated  by this  Agreement,  to be
subject to the  registration  requirements of the Securities Act as in effect on
the date hereof,  and,  assuming the  representations  and  warranties of OPTION
HOLDER  contained in Section 7(g) are true and correct,  the issuance,  sale and
delivery  of the  OPTION  GRANTOR  Shares  hereunder  would be  exempt  from the
registration and prospectus  delivery  requirements of the Securities Act, as in
effect on the date hereof (and OPTION  GRANTOR  shall not take any action  which
would cause the issuance,  sale, and delivery of OPTION GRANTOR Shares hereunder
not to be exempt from such requirements); and

                  (h)  any  OPTION  HOLDER  Shares  acquired  pursuant  to  this
Agreement  will be acquired for OPTION  GRANTOR's  own account,  for  investment
purposes  only,  and will not be acquired by OPTION  GRANTOR  with a view to the
public  distribution  thereof in  violation of any  applicable  provision of the
Securities Act.

                  7.  REPRESENTATIONS  AND WARRANTIES OF OPTION  HOLDER.  OPTION
HOLDER represents and warrants to OPTION GRANTOR that

                  (a)  Except  as set  forth  in  Schedule  4.4(a)  of  the  WPL
Disclosure  Schedule to the Merger  Agreement,  OPTION  HOLDER has the corporate
power  and  authority  to  enter  into  this  Agreement  and to  carry  out  its
obligations hereunder;

                  (b) this  Agreement  has been duly and  validly  executed  and
delivered by OPTION HOLDER and,  assuming the due  authorization,  execution and
delivery  hereof by OPTION  GRANTOR and the receipt of all  required  regulatory
approvals,  constitutes  a  valid  and  binding  obligation  of  OPTION  HOLDER,
enforceable  against  OPTION HOLDER in  accordance  with its  respective  terms,
except as may be limited by applicable bankruptcy,  insolvency,  reorganization,
or other similar laws affecting the enforcement of creditors'  rights generally,
and except that the  availability  of  equitable  remedies,  including  specific
performance,  may be subject to the  discretion  of any court  before  which any
proceeding may be brought;

                  (c)  prior  to  any  delivery  of  OPTION   HOLDER  Shares  in
consideration of the purchase of OPTION GRANTOR Shares pursuant  hereto,  OPTION
HOLDER will have taken all necessary  corporate action to authorize for issuance
and to permit it to issue such OPTION HOLDER  Shares,  all of which,  upon their
issuance and delivery in accordance  with the terms of this  Agreement,  will be
duly  authorized,  validly  issued,  fully  paid and  nonassessable  (except  as
otherwise provided in Section 180.0622(2)(b) of the WBCL);

                                     - 8 -

<PAGE>

                  (d) upon any delivery of such OPTION  HOLDER  Shares to OPTION
GRANTOR in  consideration  of the  purchase of OPTION  GRANTOR  Shares  pursuant
hereto,  OPTION  GRANTOR will acquire the OPTION HOLDER Shares free and clear of
all claims,  liens,  charges,  encumbrances and security interests of any nature
whatsoever;

                  (e)  except  as  described  in  Section   4.4(b)  of  the  WPL
Disclosure Schedule to the Merger Agreement,  the execution and delivery of this
Agreement by OPTION  HOLDER does not, and the  consummation  by OPTION HOLDER of
the transactions contemplated hereby will not, violate, conflict with, or result
in the breach of any  provision  of, or  constitute  a default  (with or without
notice or a lapse of time, or both) under,  or result in any Violation by OPTION
HOLDER or any of its Subsidiaries, pursuant to

                           (i) any provision of the Articles of Incorporation or
         Bylaws of OPTION HOLDER,

                           (ii) any Material Contract of OPTION HOLDER or any of
         its subsidiaries or to which any of them is a party, or

                           (iii) any  judgment,  order,  decree,  statute,  law,
         ordinance,  rule or  regulation  applicable  to  OPTION  HOLDER  or its
         properties or assets,

which  Violation,  in the case of each of clauses  (ii) or (iii),  would have an
OPTION HOLDER Material Adverse Effect;

                  (f)  except  as  described  in  Section   4.4(c)  of  the  WPL
Disclosure  Schedule  to the  Merger  Agreement  or  Section 1 or 3 hereof,  the
execution  and  delivery of this  Agreement  by OPTION  HOLDER does not, and the
consummation by OPTION HOLDER of the transactions  contemplated hereby will not,
require  any  consent,  approval,  authorization  or permit of,  filing  with or
notification to, any Governmental Authority; and

                  (g) any OPTION  GRANTOR  Shares  acquired upon exercise of the
OPTION  GRANTOR  Option will be acquired for OPTION  HOLDER's  own account,  for
investment  purposes only and will not be, and the OPTION  GRANTOR Option is not
being, acquired by OPTION HOLDER with a view to the public distribution thereof,
in violation of any applicable provision of the Securities Act.

                  8.  CERTAIN REPURCHASES.

                  (a) OPTION  HOLDER  "PUT".  At the request of OPTION HOLDER by
written  notice  (x) at any time  during  which  the  OPTION  GRANTOR  Option is
exercisable pursuant to Section 2 (the "Repurchase Period"),  OPTION GRANTOR (or
any successor  entity thereof) shall, if permitted by applicable law, the OPTION
GRANTOR Articles and Bylaws and OPTION GRANTOR's Material Contracts,  repurchase
from OPTION HOLDER all or any portion of the OPTION GRANTOR Option, at the price
set forth in subparagraph  (i) below,  or, (y) at any time prior to May 10, 1997
(provided  that  such  date  shall  be  extended  to  May  10,  1998  under  the
circumstances  where the date after which either party may  terminate the Merger
Agreement pursuant to Section 10.1(b) of the Merger Agreement

                                     - 9 -

<PAGE>

has been extended to May 10,  1998),  OPTION  GRANTOR (or any  successor  entity
thereof) shall, if permitted by applicable law, the OPTION GRANTOR  Articles and
Bylaws and OPTION GRANTOR's  Material  Contracts,  repurchase from OPTION HOLDER
all or any  portion of the OPTION  GRANTOR  Shares  purchased  by OPTION  HOLDER
pursuant to the OPTION GRANTOR  Option,  at the price set forth in  subparagraph
(ii) below:

                         (i) (A) The difference between the "Market/Offer Price"
         (as defined  below) for shares of OPTION GRANTOR Common Stock as of the
         date OPTION  HOLDER  gives  notice of its intent to exercise its rights
         under this Section 8 and the Exercise  Price,  multiplied by the number
         of OPTION  GRANTOR  Shares  purchasable  pursuant to the OPTION GRANTOR
         Option (or  portion  thereof  with  respect to which  OPTION  HOLDER is
         exercising   its  rights  under  this  Section  8),  but  only  if  the
         Market/Offer Price is greater than the Exercise Price.

                           (B) for  purposes  of this  Agreement,  "Market/Offer
         Price")  shall  mean,  as of any date,  the higher of (I) the price per
         share offered as of such date pursuant to any tender or exchange  offer
         or other offer with respect to a Business Combination  involving OPTION
         GRANTOR as the Target  Party  which was made prior to such date and not
         terminated  or withdrawn as of such date and (II) the Fair Market Value
         of OPTION GRANTOR Common Stock as of such date.

                        (ii) (A) the product of (I) the sum of (a) the  Exercise
         Price paid by OPTION HOLDER per OPTION GRANTOR Share acquired  pursuant
         to the OPTION GRANTOR Option, and (b) the difference between the "Offer
         Price" (as defined below) and the Exercise Price, but only if the offer
         Price is greater that the Exercise Price, and (II) the number of OPTION
         GRANTOR Shares so to be repurchased pursuant to this Section 8.

                           (B) For  purposes  of this  clause  (ii),  the "Offer
         Price"  shall be the  highest  price per share  offered  pursuant  to a
         tender or exchange offer or other Business  Combination offer involving
         OPTION GRANTOR as the Target Party during the  Repurchase  Period prior
         to the delivery by OPTION HOLDER of a notice of repurchase.

                  (b) REDELIVERY OF OPTION HOLDER SHARES. If OPTION HOLDER shall
have  previously  elected to  purchase  OPTION  GRANTOR  Shares  pursuant to the
exercise of the OPTION  GRANTOR  Option by the  issuance  and delivery of OPTION
HOLDER Shares,  then OPTION GRANTOR shall, if so requested by OPTION HOLDER,  in
fulfillment of its obligation pursuant to Section 8(a)(y) (that is, with respect
to the  Exercise  Price only and without  limitation  to its  obligation  to pay
additional consideration under clause (b) of Section 8(a)(ii)(A)(I)),  redeliver
the certificates for such OPTION HOLDER Shares to OPTION HOLDER,  free and clear
of all liens, claims, charges and encumbrances of any kind or nature whatsoever;
provided,  however,  that if at any time  less  than all of the  OPTION  GRANTOR
Shares so purchased by OPTION HOLDER  pursuant to the OPTION  GRANTOR Option are
to be repurchased by OPTION GRANTOR pursuant to Section 8(a)(y), then (i) OPTION
GRANTOR shall be obligated to redeliver to OPTION HOLDER the same  proportion of
such OPTION HOLDER Shares as the number of OPTION

                                     - 10 -

<PAGE>

GRANTOR Shares that OPTION GRANTOR is then obligated to repurchase  bears to the
number of OPTION GRANTOR  Shares  acquired by OPTION HOLDER upon exercise of the
OPTION  GRANTOR  Option and (ii) OPTION HOLDER shall issue to OPTION GRANTOR new
certificates  representing  those OPTION  HOLDER  Shares which are not due to be
redelivered  to OPTION  HOLDER  pursuant to this Section 8(b) to the extent that
excess  OPTION  HOLDER Shares are included in the  certificates  redelivered  to
OPTION HOLDER by OPTION GRANTOR.

                  (c)  PAYMENT  AND  REDELIVERY  OF OPTION  GRANTOR  OPTIONS  OR
SHARES.  In the event OPTION  HOLDER  exercises its rights under this Section 8,
OPTION  GRANTOR  shall,  within ten business days  thereafter,  pay the required
amount to OPTION HOLDER in immediately  available  funds and OPTION HOLDER shall
surrender to OPTION  GRANTOR the OPTION  GRANTOR  Option or the  certificate  or
certificates  evidencing the OPTION  GRANTOR  Shares  purchased by OPTION HOLDER
pursuant hereto, and OPTION HOLDER shall warrant that it owns the OPTION GRANTOR
Option or such shares and that the OPTION GRANTOR Option or such shares are then
free and clear of all liens,  claims,  damages,  charges and encumbrances of any
kind or nature whatsoever.

                  (d) OPTION  HOLDER  "CALL".  If OPTION  HOLDER has  elected to
purchase  OPTION GRANTOR  Shares  pursuant to the exercise of the OPTION GRANTOR
Option by the  issuance and delivery of OPTION  HOLDER  Shares,  notwithstanding
that OPTION  HOLDER may no longer hold any such  OPTION  GRANTOR  Shares or that
OPTION  HOLDER  elects not to exercise  its other  rights  under this Section 8,
OPTION  HOLDER  may  require,  at any time or from time to time prior to May 10,
1997  (provided  that such date  shall be  extended  to May 10,  1998  under the
circumstances  where the date after which either party may  terminate the Merger
Agreement  pursuant to Section 10.1(b) of the Merger Agreement has been extended
to May 10, 1998), OPTION GRANTOR to sell to OPTION HOLDER any such OPTION HOLDER
Shares at the price  attributed to such OPTION HOLDER Shares pursuant to Section
4 plus  interest  at the rate of 8.75% per annum on such amount from the Closing
Date relating to the exchange of such OPTION HOLDER Shares pursuant to Section 4
to the Closing Date under this  Section  8(d) less any  dividends on such OPTION
HOLDER Shares paid during such period or declared and payable to stockholders of
record on a date during such period.

                  (e) REPURCHASE PRICE REDUCED AT OPTION HOLDER'S OPTION. In the
event the repurchase  price specified in Section 8(a) would subject the purchase
of the OPTION GRANTOR  Option or the OPTION  GRANTOR Shares  purchased by OPTION
HOLDER  pursuant to the OPTION GRANTOR Option to a vote of the  shareholders  of
OPTION GRANTOR pursuant to applicable law or the OPTION GRANTOR  Articles,  then
OPTION HOLDER may, at its  election,  reduce the  repurchase  price to an amount
which would permit such repurchase  without the necessity for such a shareholder
vote.

                  9.  VOTING OF SHARES.  Following  the date hereof and prior to
the fifth  anniversary of the date hereof (the  "Expiration  Date"),  each party
shall vote any shares of capital stock of the other party acquired by such party
pursuant to this Agreement  ("Restricted  Shares"),  including any OPTION HOLDER
Shares issued pursuant to Section

                                     - 11 -

<PAGE>

1(b),  or  otherwise  beneficially  owned  (within  the  meaning  of Rule  13d-3
promulgated under the Securities Exchange Act of 1934, as amended (the "Exchange
Act")), by such party on each matter submitted to a vote of shareholders of such
other party for and against  such matter in the same  proportion  as the vote of
all other  shareholders  of such  other  party are  voted  (whether  by proxy or
otherwise) for and against such matter.

                  10. RESTRICTIONS ON TRANSFER.

                  (a) RESTRICTIONS ON TRANSFER.  Prior to the Expiration  Date,
neither party shall,  directly or indirectly,  by operation of law or otherwise,
sell, assign,  pledge, or otherwise dispose of or transfer any Restricted Shares
beneficially  owned by such party, other than (i) pursuant to Section 8, or (ii)
in accordance with Section 10(b) or Section 11.

                  (b) PERMITTED  SALES.  Following the termination of the Merger
Agreement, a party shall be permitted to sell any Restricted Shares beneficially
owned by it if such sale is made pursuant to a tender or exchange offer that has
been approved or recommended,  or otherwise  determined to be fair to and in the
best  interests of the  shareholders  of the other  party,  by a majority of the
members of the Board of  Directors  of such other party,  which  majority  shall
include a majority of directors who were directors prior to the  announcement of
such tender or exchange offer.

                  11. REGISTRATION RIGHTS.

                  (a) Following the termination of the Merger Agreement,  either
party hereto that owns Restricted Shares (a "Designated  Holder") may by written
notice (the "Registration Notice") to the other party (the "Registrant") request
the  Registrant  to  register  under the  Securities  Act all or any part of the
Restricted Shares beneficially owned by such Designated Holder (the "Registrable
Securities")  pursuant  to a  bona  fide  firm  commitment  underwritten  public
offering,  in which the Designated  Holder and the underwriters  shall effect as
wide a distribution of such Registrable  Securities as is reasonably practicable
and shall use their best efforts to prevent any person  (including any Group (as
used in Rule 13d-5 under the Exchange Act)) and its affiliates  from  purchasing
through  such  offering  Restricted  Shares  representing  more  than  1% of the
outstanding shares of common stock of the Registrant on a fully diluted basis (a
"Permitted Offering").

                  (b)  The  Registration  Notice  shall  include  a  certificate
executed by the Designated Holder and its proposed managing  underwriter,  which
underwriter  shall  be an  investment  banking  firm  of  nationally  recognized
standing (the "Manager"), stating that

                           (i) they  have a good  faith  intention  to  commence
         promptly a Permitted Offering, and

                           (ii) the manager in good faith believes  that,  based
         on the then-prevailing  market conditions,  it will be able to sell the
         Registrable  Securities  at a per share  price equal to at least 80% of
         the then Fair Market Value of such shares.

                                     - 12 -

<PAGE>

                  (c)  The  Registrant  (and/or  any  person  designated  by the
Registrant)  shall  thereupon  have the option  exercisable  by  written  notice
delivered to the Designated Holder within ten business days after the receipt of
the Registration Notice, irrevocably to agree to purchase all or any part of the
Registrable  Securities  proposed to be so sold for cash at a price (the "Option
Price") equal to the product of (i) the number of  Registrable  Securities to be
so  purchased  by the  Registrant  and (ii) the then Fair  Market  Value of such
shares.

                  (d) Any purchase of  Registrable  Securities by the Registrant
(or its  designee)  under Section 11(c) shall take place at a closing to be held
at the principal  executive  offices of the  Registrant or at the offices of its
counsel at any reasonable date and time designated by the Registrant and/or such
designee in such  notice  within  twenty  business  days after  delivery of such
notice,  and any  payment  for the  shares to be so  purchased  shall be made by
delivery at the time of such closing in immediately available funds.

                  (e) If the  Registrant  does not elect to exercise  its option
pursuant to this Section 11 with respect to all Registrable Securities, it shall
use its best efforts to effect,  as promptly as  practicable,  the  registration
under the Securities Act of the unpurchased  Registrable  Securities proposed to
be so sold; provided, however, that

                           (i)  neither  party  shall be entitled to demand more
         than an aggregate of two effective  registration  statements hereunder,
         and

                           (ii) the Registrant  will not be required to file any
         such registration statement during any period of time (not to exceed 40
         days after  such  request in the case of clause (A) below or 90 days in
         the case of clauses (B) and (C) below) when

                                (A) the  Registrant is in possession of material
                  non-public  information which it reasonably  believes would be
                  detrimental  to be  disclosed at such time and, in the opinion
                  of  counsel  to the  Registrant,  such  information  would  be
                  required to be  disclosed  if a  registration  statement  were
                  filed at that time;

                                (B)  the   Registrant  is  required   under  the
                  Securities Act to include audited financial statements for any
                  period  in such  registration  statement  and  such  financial
                  statements  are  not  yet  available  for  inclusion  in  such
                  registration statement; or

                                (C) the Registrant determines, in its reasonable
                  judgment,  that such  registration  would  interfere  with any
                  financing, acquisition or other material transaction involving
                  the Registrant or any of its affiliates.

                  (f) The Registrant  shall use its  reasonable  best efforts to
cause any Registrable  Securities  registered  pursuant to this Section 11 to be
qualified for sale under the  securities or Blue Sky laws of such  jurisdictions
as the  Designated  Holder  may  reasonably  request  and  shall  continue  such
registration or qualification in effect in such jurisdiction; provided, however,
that the  Registrant  shall not be  required  to qualify to do  business  in, or
consent to general  service of process  in, any  jurisdiction  by reason of this
provision.

                                     - 13 -

<PAGE>

                  (g) The  registration  rights set forth in this Section 11 are
subject to the condition that the Designated Holder shall provide the Registrant
with such information with respect to such holder's Registrable Securities,  the
plans for the distribution  thereof,  and such other information with respect to
such holder as, in the  reasonable  judgment of counsel for the  Registrant,  is
necessary to enable the Registrant to include in such registration statement all
material  facts  required  to  be  disclosed  with  respect  to  a  registration
thereunder.

                  (h) A  registration  effected  under this  Section 11 shall be
effected at the  Registrant's  expense,  except for  underwriting  discounts and
commissions  and the fees and the expenses of counsel to the Designated  Holder,
and  the  Registrant  shall  provide  to  the  underwriters  such  documentation
(including  certificates,   opinions  of  counsel  and  "comfort"  letters  from
auditors) as is customary in connection with  underwritten  public  offerings as
such underwriters may reasonably require.

                  (i) In connection  with any  registration  effected under this
Section 11, the parties agree

                           (i) to indemnify each other and the  underwriters  in
         the customary manner,

                           (ii) to enter into an underwriting  agreement in form
         and substance  customary for transactions of such type with the Manager
         and the other underwriters participating in such offering, and

                          (iii)  to take  all  further  actions  which  shall be
         reasonably necessary to effect such registration and sale (including if
         the   Manager   deems  it   necessary,   participating   in   road-show
         presentations).

                  (j) The  Registrant  shall  be  entitled  to  include  (at its
expense)  additional  shares  of its  common  stock in a  registration  effected
pursuant  to this  Section 11 only if and to the extent the  Manager  determines
that such inclusion will not adversely  affect the prospects for success of such
offering.

                  12.  ADJUSTMENT  UPON  CHANGES  IN   CAPITALIZATION.   Without
limitation to any  restriction on OPTION GRANTOR  contained in this Agreement or
in the Merger  Agreement,  in the event of any change in OPTION  GRANTOR  Common
Stock by reason of stock dividends,  splitups,  mergers (other than the Merger),
recapitalizations,  combinations,  exchange of shares or the like,  the type and
number of shares or securities  subject to the OPTION  GRANTOR  Option,  and the
purchase price per share provided in Section 1, shall be adjusted  appropriately
to  restore  to OPTION  HOLDER  its  rights  hereunder,  including  the right to
purchase from OPTION GRANTOR (or its successors) shares of OPTION GRANTOR Common
Stock (or such other shares or securities into which OPTION GRANTOR Common Stock
has been so changed)  representing  the Option Shares  Percentage of the Initial
Number of shares of OPTION GRANTOR Common Stock for the aggregate Exercise Price
calculated as of the date of this Agreement as provided in Section 1.

                                     - 14 -

<PAGE>

                  13. RESTRICTIVE LEGENDS. Each certificate  representing OPTION
GRANTOR Shares issued to OPTION HOLDER  hereunder,  and OPTION HOLDER Shares, if
any,  delivered  to  OPTION  GRANTOR  at a  Closing,  shall  include a legend in
substantially the following form:

         THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED
         UNDER THE SECURITIES ACT OF 1933, AS AMENDED,  OR ANY STATE  SECURITIES
         OR BLUE SKY LAWS, AND MAY BE REOFFERED OR SOLD ONLY IF SO REGISTERED OR
         IF AN EXEMPTION FROM SUCH  REGISTRATION  IS AVAILABLE.  SUCH SECURITIES
         ARE ALSO SUBJECT TO ADDITIONAL RESTRICTIONS ON TRANSFER AS SET FORTH IN
         THE OPTION HOLDER STOCK OPTION AND TRIGGER PAYMENT AGREEMENT,  DATED AS
         OF NOVEMBER 10,  1995, A COPY OF WHICH MAY BE OBTAINED  FROM THE ISSUER
         UPON REQUEST.

It is understood and agreed that:

                           (i) the reference to the resale  restrictions  of the
         Securities  Act and  state  securities  or Blue Sky  laws in the  above
         legend  shall be  removed  by  delivery  of  substitute  certificate(s)
         without such reference if OPTION HOLDER or OPTION GRANTOR,  as the case
         may be, shall have delivered to the other party a copy of a letter from
         the staff of the SEC, or an opinion of counsel,  in form and  substance
         satisfactory  to the other party, to the effect that such legend is not
         required for purposes of the Securities Act or such laws;

                           (ii)  the   reference  to  the   provisions  to  this
         Agreement  in  the  above  legend  shall  be  removed  by  delivery  of
         substitute  certificate(s)  without  such  reference if the shares have
         been sold or  transferred  in  compliance  with the  provisions of this
         Agreement and under  circumstances that do not require the retention of
         such reference; and

                           (iii) the legend  shall be removed in its entirety if
         the  conditions  in  the  preceding  clauses  (i)  and  (ii)  are  both
         satisfied.

In addition, such certificates shall bear any other legend as may be required by
law.  Certificates  representing  shares sold in a  registered  public  offering
pursuant  to  Section 11 shall not be  required  to bear the legend set forth in
this Section 13.

                  14.   BINDING   EFFECT;   NO   ASSIGNMENT;   NO  THIRD   PARTY
BENEFICIARIES. (a) This Agreement shall be binding upon and inure to the benefit
of the parties hereto and their respective successors and permitted assigns.

                  (b)  Except  as  expressly  provided  for in  this  Agreement,
neither this  Agreement nor the rights or obligations of either party hereto are
assignable, except by operation of law, or with the written consent of the other
party.

                                     - 15 -

<PAGE>

                  (c) Nothing  contained in this Agreement,  express or implied,
is intended to confer  upon any person  other than the parties  hereto and their
respective  permitted assigns any rights or remedies of any nature whatsoever by
reason of this Agreement.

                  (d) Any Restricted  Shares sold by a party in compliance  with
the provisions of Section 11 shall,  upon  consummation of such sale, be free of
the restrictions  imposed with respect to such shares by this Agreement,  unless
and until such party shall  repurchase or otherwise  become the beneficial owner
of such shares,  and any  transferee of such shares shall not be entitled to the
registration rights of such party.

                  15.  SPECIFIC  PERFORMANCE.  The  parties  hereto  agree  that
irreparable  harm would  occur in the event that any of the  provisions  of this
Agreement were not performed in accordance  with their  specified  terms or were
otherwise  breached.  It is accordingly  agreed that the parties hereto shall be
entitled to an injunction or injunctions  to prevent  breaches of this Agreement
and to enforce  specifically the terms and provisions hereof in any court of the
United  States or any state having  jurisdiction,  this being in addition to any
other remedy to which they are entitled at law or equity.

                  16. VALIDITY.  (a) The invalidity or  unenforceability  of any
provision of this Agreement shall not affect the validity or  enforceability  of
the other  provisions  of this  Agreement,  which shall remain in full force and
effect.

                  (b) In the event any court or other competent  authority holds
any provisions of this Agreement to be null, void or unenforceable,  the parties
hereto shall  negotiate in good faith the execution and delivery of an amendment
to this Agreement in order, as nearly as possible, to effectuate,  to the extent
permitted  by law,  the  intent  of the  parties  hereto  with  respect  to such
provision and the economic effects thereof.

                  (c)  Subject to Section 5, if for any reason any such court or
regulatory agency determines that OPTION HOLDER is not permitted to acquire,  or
OPTION  GRANTOR is not permitted to  repurchase  pursuant to Section 8, the full
number of shares of OPTION GRANTOR Common Stock provided in Section 1 hereof (as
the same may be  adjusted),  it is the express  intention  of OPTION  GRANTOR to
allow OPTION HOLDER to acquire or to require OPTION  GRANTOR to repurchase  such
lesser  number  of  shares  as may  be  permissible  without  any  amendment  or
modification hereof.

                  (d)  Each  party  agrees  that,  should  any  court  or  other
competent  authority  hold any provision of this  Agreement or part hereof to be
null, void or unenforceable,  or order any party to take any action inconsistent
herewith,  or not take any action required herein,  the other party shall not be
entitled  to specific  performance  of such  provision  or part hereof or to any
other remedy,  including but not limited to money damages,  for breach hereof or
of any other  provision  of this  Agreement or part hereof as the result of such
holding or order.

                  17. NOTICES.  All notices and other  communications  hereunder
shall be in writing and shall be deemed given if (a)  delivered  personally,  or
(b) if sent by overnight courier service (receipt confirmed in writing),  or (c)
if delivered by facsimile  transmission  (with receipt  confirmed),  or (d) five
days after being mailed by registered or certified mail

                                     - 16 -

<PAGE>

(return  receipt  requested)  to the  parties  in  each  case  to the  following
addresses  (or at such other  address for a party as shall be  specified by like
notice):

                  A.       If to OPTION HOLDER, to:

                           WPL Holdings, Inc.
                           222 West Washington Avenue
                           Madison, Wisconsin  53703

                           Attention:  Erroll B. Davis, Jr.
                           Fax:  (608) 252-5059

                           with a copy to:

                           Foley & Lardner
                           777 East Wisconsin Avenue
                           Milwaukee, Wisconsin  53202-5367

                           Attention:  Benjamin F. Garmer, III, Esq.
                           Fax:  (414) 297-4900

                  B.       If to OPTION GRANTOR, to:

                           IES Industries Inc.
                           IES Tower
                           200 First Street S.E.
                           Cedar Rapids, Iowa  52401

                           Attention:  Lee Liu
                           Fax:  (319) 398-4204

                           with a copy to:

                           Winthrop, Stimson, Putnam & Roberts
                           One Battery Park Plaza
                           New York, New York  10004-1490

                           Attention:  Stephen R. Rusmisel, Esq.
                           Fax:  (212) 858-1500

                                     - 17 -

<PAGE>

                  18.  GOVERNING  LAW. This  Agreement  shall be governed by and
construed in  accordance  with the laws of the State of Delaware  applicable  to
agreements  made and to be  performed  entirely  within  such State and  without
regard to its choice of law principles or to any  requirement as to jurisdiction
or service of process contained in Section 2708 of Title 6 of the Delaware Code.

                  19. INTERPRETATION.

                  (a) When  reference  is made in this  Agreement  to  Articles,
Sections or Exhibits, such reference shall be to an Article,  Section or Exhibit
of this Agreement, as the case may be, unless otherwise indicated.

                  (b) The  table of  contents  and  headings  contained  in this
Agreement are for reference purposes and shall not affect in any way the meaning
or interpretation of the Agreement.

                  (c) Whenever the words  "include,"  "includes," or "including"
are used in this  Agreement,  they shall be deemed to be  followed  by the words
"without limitation."

                  (d)  Whenever  "or"  is used in this  Agreement  it  shall  be
construed in the nonexclusive sense.

                  20.  COUNTERPARTS;  EFFECT.  This Agreement may be executed in
one or more counterparts,  each of which shall be deemed to be an original,  but
all of which shall constitute one and the same agreement.

                  21. AMENDMENTS;  WAIVER.  This Agreement may be amended by the
parties  hereto and the terms and  conditions  hereof  may be waived  only by an
instrument in writing signed on behalf of each of the parties hereto, or, in the
case of a waiver,  by an  instrument  signed  on  behalf  of the  party  waiving
compliance.

                  22. EXTENSION OF TIME PERIODS.  The time periods for exercises
of certain  rights under  Sections 2, 7 and 8 shall be extended (but in no event
by more than six months):

                  (a) to the extent necessary to obtain all regulatory approvals
for the exercise of such rights, and for the expiration of all statutory waiting
periods; and

                  (b) to the  extent  necessary  to avoid  any  liability  under
Section 16(b) of the Exchange Act by reason of such exercise.



                      THIS SPACE INTENTIONALLY LEFT BLANK





                                     - 18 -

<PAGE>

                  IN WITNESS  WHEREOF,  the  parties  hereto  have  caused  this
Agreement to be executed by their respective duly authorized  officers as of the
date first above written.

                                       IES INDUSTRIES INC.


                                       By:/s/ Lee Liu
                                          -----------
                                          Name:   Lee Liu
                                          Title:  Chairman of the Board,
                                                   President and Chief Executive
                                                   Officer


                                       WPL HOLDINGS, INC.


                                       By:/s/ ERROLL B. DAVIS, JR.
                                          ------------------------
                                          Name:   Erroll B. Davis, Jr.
                                          Title:  President and Chief Executive
                                                   Officer



                                     - 19 -

<PAGE>

                                                                      EXHIBIT D


                   OPTION GRANTOR/OPTION HOLDER STOCK OPTION
                         AND TRIGGER PAYMENT AGREEMENT


                  This STOCK  OPTION  AGREEMENT,  dated as of November  10, 1995
(the  "Agreement")  by and among IES  Industries  Inc., a corporation  organized
under the laws of the State of Iowa  ("OPTION  GRANTOR"  or the  "Company")  and
Interstate Power Company, a corporation organized under the laws of the State of
Delaware ("OPTION HOLDER").

                          W I T N E S S E T H   T H A T:

                  WHEREAS,  concurrently with the execution and delivery of this
Agreement,  OPTION  GRANTOR,  OPTION HOLDER,  WPL Holdings,  Inc., a corporation
organized under the laws of the State of Wisconsin ("WPL"), and AMW Acquisition,
Inc., a wholly-owned  subsidiary of WPL organized under the laws of the State of
Delaware ("AMW"), are entering into an Agreement and Plan of Merger, dated as of
November 10, 1995, (the "Merger  Agreement"),  which provides,  inter alia, upon
the  terms and  subject  to the  conditions  thereof,  for the  merger of OPTION
GRANTOR with and into WPL in accordance with the laws of the States of Wisconsin
and Iowa (the "IES  Merger"),  and the merger of AMW with and into OPTION HOLDER
in accordance with the laws of the State of Delaware (the  "Interstate  Merger",
and together with the IES Merger, the "Merger");

                  WHEREAS,  in  connection  with  the  execution  of the  Merger
Agreement, OPTION GRANTOR, OPTION HOLDER and WPL are entering into certain stock
option  agreements dated as of the date hereof,  of which this Agreement is one,
whereby the parties  hereto  grant each other an option with  respect to certain
shares of each other's  common stock on the terms and subject to the  conditions
set forth therein (the "Stock Option Agreements"); and

                  WHEREAS,  as a condition  to OPTION  HOLDER's  willingness  to
enter into the Merger Agreement, OPTION HOLDER has requested that OPTION GRANTOR
agree,  and OPTION  GRANTOR has so agreed,  to grant to OPTION  HOLDER an option
with respect to certain shares of OPTION  GRANTOR's  common stock,  on the terms
and subject to the conditions set forth herein;

                  NOW,  THEREFORE,  to induce  OPTION  HOLDER to enter  into the
Merger   Agreement  and  certain  of  the  Stock  Option   Agreements,   and  in
consideration  of the  representations,  warranties,  covenants  and  agreements
contained  herein, in the Merger Agreement and in the Stock Option Agreements to
which OPTION GRANTOR and OPTION

<PAGE>

HOLDER are parties,  the parties hereto,  intending to be legally bound,  hereby
agree as follows:

                  1. GRANT OF OPTION.

                  (a) Subject to the  receipt of all  regulatory  approvals  and
orders  required  by OPTION  GRANTOR as set forth in  Section  5.4(c) of the IES
Disclosure Schedule to the Merger Agreement and by OPTION HOLDER as set forth in
Section 6.4(c) of the Interstate  Disclosure  Schedule to the Merger  Agreement,
OPTION GRANTOR  hereby grants OPTION HOLDER an  irrevocable  option (the "OPTION
GRANTOR Option") to purchase up to that number of shares,  subject to adjustment
as provided in Section 12 (the "OPTION GRANTOR Shares"), of common stock, no par
value,  of  OPTION  GRANTOR  (the  "OPTION  GRANTOR  Common  Stock")  equal to a
percentage (the "Option Shares  Percentage"),  which Option Shares Percentage is
equal to the  OPTION  HOLDER's  Participation  Percentage  as  defined  below in
subsection (e), of 5,861,115  shares of OPTION GRANTOR Common Stock (being 19.9%
of the number of shares of OPTION GRANTOR Common Stock issued and outstanding as
of November 10, 1995, the "Initial  Number") in the manner set forth below, at a
price (the  "Exercise  Price") per OPTION  GRANTOR  Share of $26.7125  (which is
equal to the Fair Market Value (as defined  below) of a OPTION  GRANTOR Share as
of the date hereof).

                  (b) The Exercise  Price shall be payable,  at OPTION  HOLDER's
option, as follows:

                           (i)   in cash, or

                           (ii)  subject to the receipt of all  approvals of any
         Governmental  Authority  required  for OPTION  GRANTOR to acquire,  and
         OPTION HOLDER to issue,  the OPTION  HOLDER  Shares (as defined  below)
         from OPTION  HOLDER,  in shares of common  stock,  $3.50 par value,  of
         OPTION HOLDER ("OPTION HOLDER Shares"),

in either case in accordance with Section 4 hereof.

                  (c)  Notwithstanding  the  foregoing,  in no event  shall  the
number  of  OPTION  GRANTOR  Shares  for  which  the  OPTION  GRANTOR  Option is
exercisable  exceed the product of the Option Shares  Percentage and the Initial
Number, subject to adjustment as provided in Section 12.

                  (d) As used herein, the "Fair Market Value" of any share shall
be the average of the daily  closing  sales price for such share on the New York
Stock  Exchange (the "NYSE") during the ten NYSE trading days prior to the fifth
NYSE trading day preceding the date such Fair Market Value is to be determined.

                  (e) For  purposes of this  Agreement  the term  "Participation
Percentage"  shall have the same meaning as in Section  10.3(f)(i) of the Merger
Agreement,  except that the numerator and denominator  shall be calculated based
on the number of shares of WPL

                                     - 2 -

<PAGE>

Common  Stock which would be issuable  (or, in the case of WPL,  retained by its
shareholders) on a fully diluted basis had the Effective Time occurred as of the
date on which the  Exercise  Notice is delivered  under  Section 2 hereof or the
date on which demand for the Trigger  Payment (as defined herein) is given under
Section 5 hereof,  as the case may be. Other  capitalized  terms used herein but
not defined herein shall have the meanings set forth in the Merger Agreement.

                  2. EXERCISE OF OPTION.

                  (a) The  OPTION  GRANTOR  Option  may be  exercised  by OPTION
HOLDER,  in whole or in part,  at any time or from time to time after the Merger
Agreement becomes  terminable by OPTION HOLDER under  circumstances  which could
entitle OPTION HOLDER to a termination  fee under Section  10.3(a) of the Merger
Agreement  (provided that the events specified in Section  10.3(a)(ii)(A) of the
Merger  Agreement shall have occurred,  although the events specified in Section
10.3(a)(ii)(B) thereof need not have occurred), or Section 10.3(b) of the Merger
Agreement  (regardless of whether the Merger Agreement is actually terminated or
whether  there occurs a closing of any Business  Combination  involving a Target
Party or a closing by which a Target Party becomes a Subsidiary), any such event
by which the Merger  Agreement  becomes so  terminable  by OPTION  HOLDER  being
referred to herein as a "Trigger Event").

                  (b) (i) OPTION GRANTOR shall notify OPTION HOLDER  promptly in
         writing of the  occurrence of any Trigger  Event,  it being  understood
         that the  giving  of such  notice  by  OPTION  GRANTOR  shall  not be a
         condition to the right of OPTION HOLDER to exercise the OPTION  GRANTOR
         Option.

                           (ii) In the event  OPTION  HOLDER  wishes to exercise
         the  OPTION  GRANTOR  Option,  OPTION  HOLDER  shall  deliver to OPTION
         GRANTOR  written  notice (an "Exercise  Notice")  specifying  the total
         number of OPTION GRANTOR Shares it wishes to purchase.

                           (iii)  Upon the  giving  by  OPTION  HOLDER to OPTION
         GRANTOR  of the  Exercise  Notice  and  the  tender  of the  applicable
         aggregate Exercise Price, OPTION HOLDER, to the extent permitted by law
         and OPTION GRANTOR's  organizational  documents,  and provided that the
         conditions to OPTION  GRANTOR's  obligation to issue the OPTION GRANTOR
         Shares  to OPTION  HOLDER  hereunder  set forth in  Section 3 have been
         satisfied or waived,  shall be deemed to be the holder of record of the
         OPTION GRANTOR Shares issuable upon such exercise, notwithstanding that
         the stock transfer books of OPTION GRANTOR shall then be closed or that
         certificates  representing such OPTION GRANTOR Shares shall not then be
         actually delivered to OPTION HOLDER.

                           (iv) Each  closing  of a purchase  of OPTION  GRANTOR
         Shares (a "Closing")  shall occur at a place,  on a date, and at a time
         designated  by OPTION HOLDER in an Exercise  Notice  delivered at least
         two business days prior to the date of the Closing.

                                     - 3 -

<PAGE>

                  (c)  The  OPTION  GRANTOR  Option  shall  terminate  upon  the
earliest to occur of:

                           (i) the Effective Time of the Merger;

                           (ii) the termination of the Merger Agreement pursuant
         to Section  10.1  thereof,  other than under  circumstances  which also
         constitute a Trigger Event under this Agreement;

                           (iii)  180  days  following  any  termination  of the
         Merger  Agreement upon or during the continuance of a Trigger Event (or
         if, at the expiration of such 180 day period, the OPTION GRANTOR Option
         cannot  be  exercised  by reason of any  applicable  judgment,  decree,
         order,  law or regulation,  ten business days after such  impediment to
         exercise  shall have been  removed or shall have  become  final and not
         subject to appeal,  but in no event under this clause  (iii) later than
         May 10, 1998); and

                           (iv) payment by OPTION GRANTOR of the Trigger Payment
         set forth in Section 5 of this Agreement to OPTION HOLDER.

                  (d) Notwithstanding  the foregoing,  the OPTION GRANTOR Option
may not be  exercised if (i) OPTION  HOLDER is in material  breach of any of its
representations or warranties,  or in material breach of any of its covenants or
agreements,  contained in this Agreement or in the Merger  Agreement,  or (ii) a
Trigger  Payment has been paid pursuant to Section 5 of this Agreement or demand
therefor has been made and not withdrawn.

                  3. CONDITIONS TO CLOSING.  The obligation of OPTION GRANTOR to
issue the OPTION  GRANTOR  Shares to OPTION  HOLDER  hereunder is subject to the
conditions that

                  (a) all waiting periods,  if any, under the HSR Act applicable
to the issuance and  acquisition of the OPTION GRANTOR  Shares  hereunder  shall
have expired or have been terminated;

                  (b) the OPTION  GRANTOR  Shares,  and any OPTION HOLDER Shares
which are issued in payment of the Exercise Price,  shall have been approved for
listing on the NYSE subject only to official notice of issuance;

                  (c) all consents,  approvals,  orders or authorizations of, or
registrations,  declarations  or  filings  with,  any  federal,  state  or local
administrative   agency  or  commission  or  other   federal,   state  or  local
Governmental  Authority,  if any,  required in  connection  with the issuance by
OPTION GRANTOR and the acquisition by OPTION HOLDER of the OPTION GRANTOR Shares
hereunder shall have been obtained or made, including,  without limitation,  the
approval  of the SEC  under  Sections  9 and 10 of the  Public  Utility  Holding
Company Act of 1935, as amended (the "1935 Act"), the approval of Iowa Utilities
Board of the  issuance of the OPTION  GRANTOR  Shares by OPTION  GRANTOR and, if
applicable,  the acquisition of OPTION GRANTOR Shares by OPTION HOLDER,  and the
approval of

                                     - 4 -

<PAGE>

the Iowa Utilities  Board,  the Minnesota  Public  Utilities  Commission and the
Illinois Commerce  Commission of the acquisition of the OPTION GRANTOR Shares by
OPTION  HOLDER and, if  applicable,  the  acquisition  by OPTION  GRANTOR of the
OPTION HOLDER Shares constituting the Exercise Price hereunder; and

                  (d) no preliminary  or permanent  injunction or other order by
any court of competent  jurisdiction  prohibiting or otherwise  restraining such
issuance shall be in effect.

The condition set forth in paragraph (b) above may be waived by OPTION  GRANTOR,
in the case of OPTION HOLDER Shares, and by OPTION HOLDER, in the case of OPTION
GRANTOR Shares, in the sole discretion of the waiving party.

                  4. CLOSING. At any Closing,

                  (a)  OPTION  GRANTOR  shall  deliver  to OPTION  HOLDER or its
designee a single  certificate  in definitive  form  representing  the number of
OPTION GRANTOR Shares  designated by OPTION HOLDER in its Exercise Notice,  such
certificate to be registered in the name of OPTION HOLDER and to bear the legend
set forth in Section 13; and

                  (b)  OPTION  HOLDER  shall  deliver  to  OPTION   GRANTOR  the
aggregate  price for the OPTION GRANTOR Shares so designated and being purchased
by

                           (i) wire transfer of immediately  available  funds or
         certified check or bank check, or

                           (ii) subject to the  condition  in Section  1(b)(ii),
         delivery of a certificate or  certificates  representing  the number of
         OPTION  HOLDER  Shares being issued by OPTION  HOLDER in  consideration
         thereof, determined in accordance with Section 4(c).

                  (c) In the event  that  OPTION  HOLDER  issues  OPTION  HOLDER
Shares to OPTION GRANTOR in  consideration  of OPTION GRANTOR Shares pursuant to
Section  4(b)(ii),  the number of OPTION  HOLDER Shares to be so issued shall be
equal to the quotient obtained by dividing:

                           (i) the  product of (x) the number of OPTION  GRANTOR
         Shares  with  respect  to which  the  OPTION  GRANTOR  Option  is being
         exercised and (y) the Exercise Price, by

                           (ii)  the Fair  Market  Value  of the  OPTION  HOLDER
         Shares  as of the date  immediately  preceding  the  date the  Exercise
         Notice is delivered to OPTION GRANTOR.

                  (d) OPTION  GRANTOR  shall pay all  expenses,  and any and all
Federal,  state  and  local  taxes  and other  charges  that may be  payable  in
connection with the preparation,  issue and delivery of stock certificates under
this Section 4.

                                     - 5 -

<PAGE>

                  5.  TRIGGER PAYMENT.

                  (a) Trigger  Payment.  Subject to the  provisions  of Section
10.3(e) of the Merger Agreement,  if a Trigger Event shall have occurred and any
regulatory approval or order required for the issuance by OPTION GRANTOR, or the
acquisition by OPTION HOLDER, of the OPTION GRANTOR Option pursuant to Section 1
hereof  shall not have been  obtained,  OPTION  HOLDER  shall  have the right to
receive,  and OPTION GRANTOR shall pay to OPTION HOLDER, an amount (the "Trigger
Payment") equal to the product of

                           (i) the maximum  number of OPTION GRANTOR Shares that
         would have been subject to purchase by OPTION  HOLDER upon  exercise of
         the OPTION  GRANTOR  Option  pursuant to Sections 1 and 2 hereof if all
         such regulatory approvals or orders had been obtained, and

                           (ii)  the  difference  between  (A) the  Market/Offer
         Price (as defined herein), determined as of the date on which notice of
         demand for the Trigger  Payment is given by OPTION HOLDER,  and (B) the
         Exercise Price (but only if such Market/Offer Price is higher than such
         Exercise Price).

Demand for the Trigger  Payment shall be given by notice in accordance  with the
provisions  of Section 17 hereof.  The Trigger  Payment  shall be paid to OPTION
HOLDER by OPTION  GRANTOR  on the  Payment  Date (as  defined  herein),  by wire
transfer  of  immediately  available  funds to an  account to be  designated  in
writing by OPTION  HOLDER not less than two  business  days  before the  Payment
Date.

                  (b) Payment  Date.  For purposes of this  Section 5,  "Payment
Date" means the date on which termination fees are required to be paid by OPTION
GRANTOR to OPTION HOLDER under Sections 10.3(a) or 10.3(b),  as the case may be,
of the Merger  Agreement  as a result of the  occurrence  of the  Trigger  Event
referred to in subsection (a) of this Section 5.

                  (c)  Certain   Conditions.   OPTION   GRANTOR  shall  have  no
obligation to pay the Trigger  Payment if OPTION HOLDER is in material breach of
any of its  representations  or warranties,  or in material breach of any of its
covenants or agreements, contained in this Agreement or in the Merger Agreement.

                  6.  REPRESENTATIONS  AND WARRANTIES OF OPTION GRANTOR.  OPTION
GRANTOR represents and warrants to OPTION HOLDER that

                  (a)  Except  as  set  forth  in  Section  5.4(a)  of  the  IES
Disclosure  Schedule to the Merger  Agreement,  OPTION GRANTOR has the corporate
power  and  authority  to  enter  into  this  Agreement  and to  carry  out  its
obligations  hereunder,  subject  in the case of the  repurchase  of the  OPTION
GRANTOR Shares  pursuant to Section 8(a) to applicable law and the provisions of
OPTION  GRANTOR's  Articles of  Incorporation,  as amended (the "OPTION  GRANTOR
Articles");

                                     - 6 -

<PAGE>

                  (b) this  Agreement  has been duly and  validly  executed  and
delivered by OPTION GRANTOR, and, assuming the due authorization,  execution and
delivery  hereof by OPTION  HOLDER and the  receipt of all  required  regulatory
approvals,  constitutes  a valid  and  binding  obligation  of  OPTION  GRANTOR,
enforceable  against OPTION GRANTOR in accordance with its terms,  except as may
be limited by applicable bankruptcy, insolvency, reorganization or other similar
laws affecting the enforcement of creditors' rights  generally,  and except that
the availability of equitable remedies,  including specific performance,  may be
subject to the discretion of any court before which any proceeding  therefor may
be brought;

                  (c) OPTION GRANTOR has taken all necessary corporate action to
authorize  and reserve for issuance and to permit it to issue,  upon exercise of
the OPTION  GRANTOR  Option,  and at all times from the date hereof  through the
expiration of the OPTION GRANTOR  Option will have reserved,  the Initial Number
of authorized and unissued OPTION GRANTOR  Shares,  such amount being subject to
adjustment  as  provided in Section 12, all of which,  upon their  issuance  and
delivery  in  accordance  with  the  terms  of  this  Agreement,  will  be  duly
authorized, validly issued, fully paid and nonassessable;

                  (d) upon  delivery  of the  OPTION  GRANTOR  Shares  to OPTION
HOLDER  upon the  exercise  of the OPTION  GRANTOR  Option,  OPTION  HOLDER will
acquire the OPTION GRANTOR Shares free and clear of all claims,  liens, charges,
encumbrances and security interests of any nature whatsoever;

                  (e)  except  as  described  in  Section   5.4(b)  of  the  IES
Disclosure Schedule to the Merger Agreement,  the execution and delivery of this
Agreement by OPTION GRANTOR does not, and, subject to compliance with applicable
law and the OPTION GRANTOR Articles with respect to the repurchase of the OPTION
GRANTOR Shares  pursuant to Section 8(a), the  consummation by OPTION GRANTOR of
the transactions contemplated hereby will not, violate, conflict with, or result
in a breach of any provision of, or constitute a default (with or without notice
or a lapse  of time,  or both)  under,  or  result  in the  termination  of,  or
accelerate  the  performance  required by, or result in a right of  termination,
cancellation,  or  acceleration  of any  obligation  or the  loss of a  material
benefit under,  or the creation of a lien,  pledge,  security  interest or other
encumbrance  on  assets  (any  such  conflict,   violation,  default,  right  of
termination,  cancellation,   acceleration,  loss  or  creation,  hereinafter  a
"Violation") of OPTION GRANTOR or any of its Subsidiaries, pursuant to

                           (i) any provision of the OPTION  GRANTOR  Articles or
         the Bylaws of OPTION GRANTOR,

                           (ii) any  provisions  of any material  loan or credit
         agreement,  note,  mortgage,  indenture,  lease,  benefit plan or other
         agreement,  obligation,  instrument,  permit, concession,  franchise or
         license  (any of the  foregoing  in  effect  on the date  hereof  being
         referred  to  as a  "Material  Contract")  of  OPTION  GRANTOR  or  its
         subsidiaries or to which any of them is a party, or

                           (iii) any  judgment,  order,  decree,  statute,  law,
         ordinance,  rule or  regulation  applicable  to OPTION  GRANTOR  or its
         properties or assets,

                                     - 7 -

<PAGE>

which Violation, in the case of each clauses (ii) and (iii), could reasonably be
expected to have an OPTION  GRANTOR  Material  Adverse  Effect  (except  that no
representation  or  warranty is given  concerning  any  Violation  of a Material
Contract with respect to the  repurchase of OPTION  GRANTOR  Shares  pursuant to
Section 8(a));

                  (f)  except  as  described  in  Section   5.4(c)  of  the  IES
Disclosure  Schedule  to the  Merger  Agreement  or  Section 1 or 3 hereof,  the
execution  and delivery of this  Agreement  by OPTION  GRANTOR does not, and the
performance of this  Agreement by OPTION GRANTOR will not,  require any consent,
approval,  authorization  or permit  of,  filing  with or  notification  to, any
Governmental Authority;

                  (g) none of OPTION  GRANTOR,  any of its  affiliates or anyone
acting on its or their  behalf,  has  issued,  sold or offered  any  security of
OPTION GRANTOR to any person under  circumstances  that would cause the issuance
and sale of OPTION GRANTOR Shares,  as  contemplated  by this  Agreement,  to be
subject to the  registration  requirements of the Securities Act as in effect on
the date hereof,  and,  assuming the  representations  and  warranties of OPTION
HOLDER  contained in Section 7(g) are true and correct,  the issuance,  sale and
delivery  of the  OPTION  GRANTOR  Shares  hereunder  would be  exempt  from the
registration and prospectus  delivery  requirements of the Securities Act, as in
effect on the date hereof (and OPTION  GRANTOR  shall not take any action  which
would cause the issuance,  sale, and delivery of OPTION GRANTOR Shares hereunder
not to be exempt from such requirements); and

                  (h)  any  OPTION  HOLDER  Shares  acquired  pursuant  to  this
Agreement  will be acquired for OPTION  GRANTOR's  own account,  for  investment
purposes  only,  and will not be acquired by OPTION  GRANTOR  with a view to the
public  distribution  thereof in  violation of any  applicable  provision of the
Securities Act.

                  7.  REPRESENTATIONS  AND WARRANTIES OF OPTION  HOLDER.  OPTION
HOLDER represents and warrants to OPTION GRANTOR that

                  (a) Except as set forth in Schedule  6.4(a) of the  Interstate
Disclosure  Schedule to the Merger  Agreement,  OPTION  HOLDER has the corporate
power  and  authority  to  enter  into  this  Agreement  and to  carry  out  its
obligations hereunder;

                  (b) this  Agreement  has been duly and  validly  executed  and
delivered by OPTION HOLDER and,  assuming the due  authorization,  execution and
delivery  hereof by OPTION  GRANTOR and the receipt of all  required  regulatory
approvals,  constitutes  a  valid  and  binding  obligation  of  OPTION  HOLDER,
enforceable  against  OPTION HOLDER in  accordance  with its  respective  terms,
except as may be limited by applicable bankruptcy,  insolvency,  reorganization,
or other similar laws affecting the enforcement of creditors'  rights generally,
and except that the  availability  of  equitable  remedies,  including  specific
performance,  may be subject to the  discretion  of any court  before  which any
proceeding may be brought;

                  (c)  prior  to  any  delivery  of  OPTION   HOLDER  Shares  in
consideration of the purchase of OPTION GRANTOR Shares pursuant  hereto,  OPTION
HOLDER will have

                                     - 8 -

<PAGE>

taken all necessary  corporate action to authorize for issuance and to permit it
to issue such  OPTION  HOLDER  Shares,  all of which,  upon their  issuance  and
delivery  in  accordance  with  the  terms  of  this  Agreement,  will  be  duly
authorized, validly issued, fully paid and nonassessable;

                  (d) upon any delivery of such OPTION  HOLDER  Shares to OPTION
GRANTOR in  consideration  of the  purchase of OPTION  GRANTOR  Shares  pursuant
hereto,  OPTION  GRANTOR will acquire the OPTION HOLDER Shares free and clear of
all claims,  liens,  charges,  encumbrances and security interests of any nature
whatsoever;

                  (e) except as  described in Section  6.4(b) of the  Interstate
Disclosure Schedule to the Merger Agreement,  the execution and delivery of this
Agreement by OPTION  HOLDER does not, and the  consummation  by OPTION HOLDER of
the transactions contemplated hereby will not, violate, conflict with, or result
in the breach of any  provision  of, or  constitute  a default  (with or without
notice or a lapse of time, or both) under,  or result in any Violation by OPTION
HOLDER or any of its Subsidiaries, pursuant to

                           (i) any provision of the Articles of Incorporation or
         Bylaws of OPTION HOLDER,

                           (ii) any Material Contract of OPTION HOLDER or any of
         its subsidiaries or to which any of them is a party, or

                           (iii) any  judgment,  order,  decree,  statute,  law,
         ordinance,  rule or  regulation  applicable  to  OPTION  HOLDER  or its
         properties or assets,

which  Violation,  in the case of each of clauses  (ii) or (iii),  would have an
OPTION HOLDER Material Adverse Effect;

                  (f) except as  described in Section  6.4(c) of the  Interstate
Disclosure  Schedule  to the  Merger  Agreement  or  Section 1 or 3 hereof,  the
execution  and  delivery of this  Agreement  by OPTION  HOLDER does not, and the
consummation by OPTION HOLDER of the transactions  contemplated hereby will not,
require  any  consent,  approval,  authorization  or permit of,  filing  with or
notification to, any Governmental Authority; and

                  (g) any OPTION  GRANTOR  Shares  acquired upon exercise of the
OPTION  GRANTOR  Option will be acquired for OPTION  HOLDER's  own account,  for
investment  purposes only and will not be, and the OPTION  GRANTOR Option is not
being, acquired by OPTION HOLDER with a view to the public distribution thereof,
in violation of any applicable provision of the Securities Act.

                  8. CERTAIN REPURCHASES.

                  (a) OPTION  HOLDER  "PUT".  At the request of OPTION HOLDER by
written  notice  (x) at any time  during  which  the  OPTION  GRANTOR  Option is
exercisable pursuant to Section 2 (the "Repurchase Period"),  OPTION GRANTOR (or
any successor

                                     - 9 -

<PAGE>

entity  thereof)  shall,  if permitted  by  applicable  law, the OPTION  GRANTOR
Articles and Bylaws and OPTION  GRANTOR's  Material  Contracts,  repurchase from
OPTION HOLDER all or any portion of the OPTION GRANTOR Option,  at the price set
forth in  subparagraph  (i) below,  or,  (y) at any time  prior to May 10,  1997
(provided  that  such  date  shall  be  extended  to  May  10,  1998  under  the
circumstances  where the date after which either party may  terminate the Merger
Agreement  pursuant to Section 10.1(b) of the Merger Agreement has been extended
to May 10, 1998),  OPTION GRANTOR (or any successor  entity  thereof)  shall, if
permitted by applicable  law, the OPTION GRANTOR  Articles and Bylaws and OPTION
GRANTOR's Material  Contracts,  repurchase from OPTION HOLDER all or any portion
of the OPTION GRANTOR Shares  purchased by OPTION HOLDER  pursuant to the OPTION
GRANTOR Option, at the price set forth in subparagraph (ii) below:

                         (i) (A) The difference between the "Market/Offer Price"
         (as defined  below) for shares of OPTION GRANTOR Common Stock as of the
         date OPTION  HOLDER  gives  notice of its intent to exercise its rights
         under this Section 8 and the Exercise  Price,  multiplied by the number
         of OPTION  GRANTOR  Shares  purchasable  pursuant to the OPTION GRANTOR
         Option (or  portion  thereof  with  respect to which  OPTION  HOLDER is
         exercising   its  rights  under  this  Section  8),  but  only  if  the
         Market/Offer Price is greater than the Exercise Price.

                           (B) for  purposes  of this  Agreement,  "Market/Offer
         Price")  shall  mean,  as of any date,  the higher of (I) the price per
         share offered as of such date pursuant to any tender or exchange  offer
         or other offer with respect to a Business Combination  involving OPTION
         GRANTOR as the Target  Party  which was made prior to such date and not
         terminated  or withdrawn as of such date and (II) the Fair Market Value
         of OPTION GRANTOR Common Stock as of such date.

                        (ii) (A) the product of (I) the sum of (a) the  Exercise
         Price paid by OPTION HOLDER per OPTION GRANTOR Share acquired  pursuant
         to the OPTION GRANTOR Option, and (b) the difference between the "Offer
         Price" (as defined below) and the Exercise Price, but only if the offer
         Price is greater that the Exercise Price, and (II) the number of OPTION
         GRANTOR Shares so to be repurchased pursuant to this Section 8.

                           (B) For  purposes  of this  clause  (ii),  the "Offer
         Price"  shall be the  highest  price per share  offered  pursuant  to a
         tender or exchange offer or other Business  Combination offer involving
         OPTION GRANTOR as the Target Party during the  Repurchase  Period prior
         to the delivery by OPTION HOLDER of a notice of repurchase.

                  (b) REDELIVERY OF OPTION HOLDER SHARES. If OPTION HOLDER shall
have  previously  elected to  purchase  OPTION  GRANTOR  Shares  pursuant to the
exercise of the OPTION  GRANTOR  Option by the  issuance  and delivery of OPTION
HOLDER Shares,  then OPTION GRANTOR shall, if so requested by OPTION HOLDER,  in
fulfillment of its obligation pursuant to Section 8(a)(y) (that is, with respect
to the  Exercise  Price only and without  limitation  to its  obligation  to pay
additional consideration under clause (b) of Section 8(a)(ii)(A)(I)),  redeliver
the certificates for such OPTION HOLDER Shares to

                                     - 10 -

<PAGE>

OPTION HOLDER, free and clear of all liens, claims,  charges and encumbrances of
any kind or nature whatsoever;  provided, however, that if at any time less than
all of the OPTION GRANTOR  Shares so purchased by OPTION HOLDER  pursuant to the
OPTION  GRANTOR  Option are to be  repurchased  by OPTION  GRANTOR  pursuant  to
Section  8(a)(y),  then (i) OPTION  GRANTOR  shall be  obligated to redeliver to
OPTION HOLDER the same  proportion of such OPTION HOLDER Shares as the number of
OPTION GRANTOR Shares that OPTION GRANTOR is then obligated to repurchase  bears
to the number of OPTION GRANTOR  Shares  acquired by OPTION HOLDER upon exercise
of the  OPTION  GRANTOR  Option and (ii)  OPTION  HOLDER  shall  issue to OPTION
GRANTOR new certificates  representing  those OPTION HOLDER Shares which are not
due to be  redelivered  to OPTION  HOLDER  pursuant to this  Section 8(b) to the
extent  that  excess  OPTION  HOLDER  Shares are  included  in the  certificates
redelivered to OPTION HOLDER by OPTION GRANTOR.

                  (c)  PAYMENT  AND  REDELIVERY  OF OPTION  GRANTOR  OPTIONS  OR
SHARES.  In the event OPTION  HOLDER  exercises its rights under this Section 8,
OPTION  GRANTOR  shall,  within ten business days  thereafter,  pay the required
amount to OPTION HOLDER in immediately  available  funds and OPTION HOLDER shall
surrender to OPTION  GRANTOR the OPTION  GRANTOR  Option or the  certificate  or
certificates  evidencing the OPTION  GRANTOR  Shares  purchased by OPTION HOLDER
pursuant hereto, and OPTION HOLDER shall warrant that it owns the OPTION GRANTOR
Option or such shares and that the OPTION GRANTOR Option or such shares are then
free and clear of all liens,  claims,  damages,  charges and encumbrances of any
kind or nature whatsoever.

                  (d) OPTION  HOLDER  "CALL".  If OPTION  HOLDER has  elected to
purchase  OPTION GRANTOR  Shares  pursuant to the exercise of the OPTION GRANTOR
Option by the  issuance and delivery of OPTION  HOLDER  Shares,  notwithstanding
that OPTION  HOLDER may no longer hold any such  OPTION  GRANTOR  Shares or that
OPTION  HOLDER  elects not to exercise  its other  rights  under this Section 8,
OPTION  HOLDER  may  require,  at any time or from time to time prior to May 10,
1997  (provided  that such date  shall be  extended  to May 10,  1998  under the
circumstances  where the date after which either party may  terminate the Merger
Agreement  pursuant to Section 10.1(b) of the Merger Agreement has been extended
to May 10, 1998), OPTION GRANTOR to sell to OPTION HOLDER any such OPTION HOLDER
Shares at the price  attributed to such OPTION HOLDER Shares pursuant to Section
4 plus  interest  at the rate of 8.75% per annum on such amount from the Closing
Date relating to the exchange of such OPTION HOLDER Shares pursuant to Section 4
to the Closing Date under this  Section  8(d) less any  dividends on such OPTION
HOLDER Shares paid during such period or declared and payable to stockholders of
record on a date during such period.

                  (e) REPURCHASE PRICE REDUCED AT OPTION HOLDER'S OPTION. In the
event the repurchase  price specified in Section 8(a) would subject the purchase
of the OPTION GRANTOR  Option or the OPTION  GRANTOR Shares  purchased by OPTION
HOLDER  pursuant to the OPTION GRANTOR Option to a vote of the  shareholders  of
OPTION GRANTOR pursuant to applicable law or the OPTION GRANTOR Articles, then

                                     - 11 -

<PAGE>

OPTION HOLDER may, at its  election,  reduce the  repurchase  price to an amount
which would permit such repurchase  without the necessity for such a shareholder
vote.

                  9.  VOTING OF SHARES.  Following  the date hereof and prior to
the fifth  anniversary of the date hereof (the  "Expiration  Date"),  each party
shall vote any shares of capital stock of the other party acquired by such party
pursuant to this Agreement  ("Restricted  Shares"),  including any OPTION HOLDER
Shares issued pursuant to Section 1(b), or otherwise  beneficially owned (within
the meaning of Rule 13d-3 promulgated under the Securities Exchange Act of 1934,
as amended (the "Exchange  Act")),  by such party on each matter  submitted to a
vote of shareholders of such other party for and against such matter in the same
proportion as the vote of all other  shareholders  of such other party are voted
(whether by proxy or otherwise) for and against such matter.

                  10. RESTRICTIONS ON TRANSFER.

                  (a)  RESTRICTIONS ON TRANSFER.  Prior to the Expiration  Date,
neither party shall,  directly or indirectly,  by operation of law or otherwise,
sell, assign,  pledge, or otherwise dispose of or transfer any Restricted Shares
beneficially  owned by such party, other than (i) pursuant to Section 8, or (ii)
in accordance with Section 10(b) or Section 11.

                  (b) PERMITTED  SALES.  Following the termination of the Merger
Agreement, a party shall be permitted to sell any Restricted Shares beneficially
owned by it if such sale is made pursuant to a tender or exchange offer that has
been approved or recommended,  or otherwise  determined to be fair to and in the
best  interests of the  shareholders  of the other  party,  by a majority of the
members of the Board of  Directors  of such other party,  which  majority  shall
include a majority of directors who were directors prior to the  announcement of
such tender or exchange offer.

                  11. REGISTRATION RIGHTS.

                  (a) Following the termination of the Merger Agreement,  either
party hereto that owns Restricted Shares (a "Designated  Holder") may by written
notice (the "Registration Notice") to the other party (the "Registrant") request
the  Registrant  to  register  under the  Securities  Act all or any part of the
Restricted Shares beneficially owned by such Designated Holder (the "Registrable
Securities")  pursuant  to a  bona  fide  firm  commitment  underwritten  public
offering,  in which the Designated  Holder and the underwriters  shall effect as
wide a distribution of such Registrable  Securities as is reasonably practicable
and shall use their best efforts to prevent any person  (including any Group (as
used in Rule 13d-5 under the Exchange Act)) and its affiliates  from  purchasing
through  such  offering  Restricted  Shares  representing  more  than  1% of the
outstanding shares of common stock of the Registrant on a fully diluted basis (a
"Permitted Offering").

                                     - 12 -

<PAGE>

                  (b)  The  Registration  Notice  shall  include  a  certificate
executed by the Designated Holder and its proposed managing  underwriter,  which
underwriter  shall  be an  investment  banking  firm  of  nationally  recognized
standing (the "Manager"), stating that

                           (i) they  have a good  faith  intention  to  commence
         promptly a Permitted Offering, and

                           (ii) the manager in good faith believes  that,  based
         on the then-prevailing  market conditions,  it will be able to sell the
         Registrable  Securities  at a per share  price equal to at least 80% of
         the then Fair Market Value of such shares.

                  (c)  The  Registrant  (and/or  any  person  designated  by the
Registrant)  shall  thereupon  have the option  exercisable  by  written  notice
delivered to the Designated Holder within ten business days after the receipt of
the Registration Notice, irrevocably to agree to purchase all or any part of the
Registrable  Securities  proposed to be so sold for cash at a price (the "Option
Price") equal to the product of (i) the number of  Registrable  Securities to be
so  purchased  by the  Registrant  and (ii) the then Fair  Market  Value of such
shares.

                  (d) Any purchase of  Registrable  Securities by the Registrant
(or its  designee)  under Section 11(c) shall take place at a closing to be held
at the principal  executive  offices of the  Registrant or at the offices of its
counsel at any reasonable date and time designated by the Registrant and/or such
designee in such  notice  within  twenty  business  days after  delivery of such
notice,  and any  payment  for the  shares to be so  purchased  shall be made by
delivery at the time of such closing in immediately available funds.

                  (e) If the  Registrant  does not elect to exercise  its option
pursuant to this Section 11 with respect to all Registrable Securities, it shall
use its best efforts to effect,  as promptly as  practicable,  the  registration
under the Securities Act of the unpurchased  Registrable  Securities proposed to
be so sold; provided, however, that

                           (i)  neither  party  shall be entitled to demand more
         than an aggregate of two effective  registration  statements hereunder,
         and

                           (ii) the Registrant  will not be required to file any
         such registration statement during any period of time (not to exceed 40
         days after  such  request in the case of clause (A) below or 90 days in
         the case of clauses (B) and (C) below) when

                                (A) the  Registrant is in possession of material
                  non-public  information which it reasonably  believes would be
                  detrimental  to be  disclosed at such time and, in the opinion
                  of  counsel  to the  Registrant,  such  information  would  be
                  required to be  disclosed  if a  registration  statement  were
                  filed at that time;

                                (B)  the   Registrant  is  required   under  the
                  Securities Act to include audited financial statements for any
                  period  in such  registration  statement  and  such  financial
                  statements  are  not  yet  available  for  inclusion  in  such
                  registration statement; or

                                     - 13 -

<PAGE>

                                (C) the Registrant determines, in its reasonable
                  judgment,  that such  registration  would  interfere  with any
                  financing, acquisition or other material transaction involving
                  the Registrant or any of its affiliates.

                  (f) The Registrant  shall use its  reasonable  best efforts to
cause any Registrable  Securities  registered  pursuant to this Section 11 to be
qualified for sale under the  securities or Blue Sky laws of such  jurisdictions
as the  Designated  Holder  may  reasonably  request  and  shall  continue  such
registration or qualification in effect in such jurisdiction; provided, however,
that the  Registrant  shall not be  required  to qualify to do  business  in, or
consent to general  service of process  in, any  jurisdiction  by reason of this
provision.

                  (g) The  registration  rights set forth in this Section 11 are
subject to the condition that the Designated Holder shall provide the Registrant
with such information with respect to such holder's Registrable Securities,  the
plans for the distribution  thereof,  and such other information with respect to
such holder as, in the  reasonable  judgment of counsel for the  Registrant,  is
necessary to enable the Registrant to include in such registration statement all
material  facts  required  to  be  disclosed  with  respect  to  a  registration
thereunder.

                  (h) A  registration  effected  under this  Section 11 shall be
effected at the  Registrant's  expense,  except for  underwriting  discounts and
commissions  and the fees and the expenses of counsel to the Designated  Holder,
and  the  Registrant  shall  provide  to  the  underwriters  such  documentation
(including  certificates,   opinions  of  counsel  and  "comfort"  letters  from
auditors) as is customary in connection with  underwritten  public  offerings as
such underwriters may reasonably require.

                  (i) In connection  with any  registration  effected under this
Section 11, the parties agree

                           (i) to indemnify each other and the  underwriters  in
         the customary manner,

                           (ii) to enter into an underwriting  agreement in form
         and substance  customary for transactions of such type with the Manager
         and the other underwriters participating in such offering, and

                          (iii)  to take  all  further  actions  which  shall be
         reasonably necessary to effect such registration and sale (including if
         the   Manager   deems  it   necessary,   participating   in   road-show
         presentations).

                  (j) The  Registrant  shall  be  entitled  to  include  (at its
expense)  additional  shares  of its  common  stock in a  registration  effected
pursuant  to this  Section 11 only if and to the extent the  Manager  determines
that such inclusion will not adversely  affect the prospects for success of such
offering.

                  12.  ADJUSTMENT  UPON  CHANGES  IN   CAPITALIZATION.   Without
limitation to any  restriction on OPTION GRANTOR  contained in this Agreement or
in the Merger  Agreement,  in the event of any change in OPTION  GRANTOR  Common
Stock by

                                     - 14 -

<PAGE>

reason  of  stock  dividends,   splitups,   mergers  (other  than  the  Merger),
recapitalizations,  combinations,  exchange of shares or the like,  the type and
number of shares or securities  subject to the OPTION  GRANTOR  Option,  and the
purchase price per share provided in Section 1, shall be adjusted  appropriately
to  restore  to OPTION  HOLDER  its  rights  hereunder,  including  the right to
purchase from OPTION GRANTOR (or its successors) shares of OPTION GRANTOR Common
Stock (or such other shares or securities into which OPTION GRANTOR Common Stock
has been so changed)  representing  the Option Shares  Percentage of the Initial
Number of shares of OPTION GRANTOR Common Stock for the aggregate Exercise Price
calculated as of the date of this Agreement as provided in Section 1.

                  13. RESTRICTIVE LEGENDS. Each certificate  representing OPTION
GRANTOR Shares issued to OPTION HOLDER  hereunder,  and OPTION HOLDER Shares, if
any,  delivered  to  OPTION  GRANTOR  at a  Closing,  shall  include a legend in
substantially the following form:

         THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED
         UNDER THE SECURITIES ACT OF 1933, AS AMENDED,  OR ANY STATE  SECURITIES
         OR BLUE SKY LAWS, AND MAY BE REOFFERED OR SOLD ONLY IF SO REGISTERED OR
         IF AN EXEMPTION FROM SUCH  REGISTRATION  IS AVAILABLE.  SUCH SECURITIES
         ARE ALSO SUBJECT TO ADDITIONAL RESTRICTIONS ON TRANSFER AS SET FORTH IN
         THE OPTION HOLDER STOCK OPTION AND TRIGGER PAYMENT AGREEMENT,  DATED AS
         OF NOVEMBER 10,  1995, A COPY OF WHICH MAY BE OBTAINED  FROM THE ISSUER
         UPON REQUEST.

It is understood and agreed that:

                           (i) the reference to the resale  restrictions  of the
         Securities  Act and  state  securities  or Blue Sky  laws in the  above
         legend  shall be  removed  by  delivery  of  substitute  certificate(s)
         without such reference if OPTION HOLDER or OPTION GRANTOR,  as the case
         may be, shall have delivered to the other party a copy of a letter from
         the staff of the SEC, or an opinion of counsel,  in form and  substance
         satisfactory  to the other party, to the effect that such legend is not
         required for purposes of the Securities Act or such laws;

                           (ii)  the   reference  to  the   provisions  to  this
         Agreement  in  the  above  legend  shall  be  removed  by  delivery  of
         substitute  certificate(s)  without  such  reference if the shares have
         been sold or  transferred  in  compliance  with the  provisions of this
         Agreement and under  circumstances that do not require the retention of
         such reference; and

                           (iii) the legend  shall be removed in its entirety if
         the  conditions  in  the  preceding  clauses  (i)  and  (ii)  are  both
         satisfied.

                                     - 15 -

<PAGE>

In addition, such certificates shall bear any other legend as may be required by
law.  Certificates  representing  shares sold in a  registered  public  offering
pursuant  to  Section 11 shall not be  required  to bear the legend set forth in
this Section 13.

                  14.   BINDING   EFFECT;   NO   ASSIGNMENT;   NO  THIRD   PARTY
BENEFICIARIES. (a) This Agreement shall be binding upon and inure to the benefit
of the parties hereto and their respective successors and permitted assigns.

                  (b)  Except  as  expressly  provided  for in  this  Agreement,
neither this  Agreement nor the rights or obligations of either party hereto are
assignable, except by operation of law, or with the written consent of the other
party.

                  (c) Nothing  contained in this Agreement,  express or implied,
is intended to confer  upon any person  other than the parties  hereto and their
respective  permitted assigns any rights or remedies of any nature whatsoever by
reason of this Agreement.

                  (d) Any Restricted  Shares sold by a party in compliance  with
the provisions of Section 11 shall,  upon  consummation of such sale, be free of
the restrictions  imposed with respect to such shares by this Agreement,  unless
and until such party shall  repurchase or otherwise  become the beneficial owner
of such shares,  and any  transferee of such shares shall not be entitled to the
registration rights of such party.

                  15.  SPECIFIC  PERFORMANCE.  The  parties  hereto  agree  that
irreparable  harm would  occur in the event that any of the  provisions  of this
Agreement were not performed in accordance  with their  specified  terms or were
otherwise  breached.  It is accordingly  agreed that the parties hereto shall be
entitled to an injunction or injunctions  to prevent  breaches of this Agreement
and to enforce  specifically the terms and provisions hereof in any court of the
United  States or any state having  jurisdiction,  this being in addition to any
other remedy to which they are entitled at law or equity.

                  16. VALIDITY.  (a) The invalidity or  unenforceability  of any
provision of this Agreement shall not affect the validity or  enforceability  of
the other  provisions  of this  Agreement,  which shall remain in full force and
effect.

                  (b) In the event any court or other competent  authority holds
any provisions of this Agreement to be null, void or unenforceable,  the parties
hereto shall  negotiate in good faith the execution and delivery of an amendment
to this Agreement in order, as nearly as possible, to effectuate,  to the extent
permitted  by law,  the  intent  of the  parties  hereto  with  respect  to such
provision and the economic effects thereof.

                  (c)  Subject to Section 5, if for any reason any such court or
regulatory agency determines that OPTION HOLDER is not permitted to acquire,  or
OPTION  GRANTOR is not permitted to  repurchase  pursuant to Section 8, the full
number of shares of OPTION GRANTOR Common Stock provided in Section 1 hereof (as
the same may be  adjusted),  it is the express  intention  of OPTION  GRANTOR to
allow OPTION HOLDER to acquire or to require OPTION  GRANTOR to repurchase  such
lesser  number  of  shares  as may  be  permissible  without  any  amendment  or
modification hereof.

                                     - 16 -

<PAGE>

                  (d)  Each  party  agrees  that,  should  any  court  or  other
competent  authority  hold any provision of this  Agreement or part hereof to be
null, void or unenforceable,  or order any party to take any action inconsistent
herewith,  or not take any action required herein,  the other party shall not be
entitled  to specific  performance  of such  provision  or part hereof or to any
other remedy,  including but not limited to money damages,  for breach hereof or
of any other  provision  of this  Agreement or part hereof as the result of such
holding or order.

                  17. NOTICES.  All notices and other  communications  hereunder
shall be in writing and shall be deemed given if (a)  delivered  personally,  or
(b) if sent by overnight courier service (receipt confirmed in writing),  or (c)
if delivered by facsimile  transmission  (with receipt  confirmed),  or (d) five
days  after  being  mailed by  registered  or  certified  mail  (return  receipt
requested)  to the parties in each case to the  following  addresses (or at such
other address for a party as shall be specified by like notice):

                  A.       If to OPTION HOLDER, to:

                           Interstate Power Company
                           1000 Main Street
                           Dubuque, Iowa  52004-0789

                           Attention:  Wayne H. Stoppelmoor
                                            Chairman
                           Fax:  (319) 557-2202

                           with a copy to:

                           Milbank, Tweed, Hadley & McCloy
                           1 Chase Manhattan Plaza
                           New York, New York  10005-1413

                           Attention:  John T. O'Connor, Esq.
                           Fax:  (212) 530-5219

                  B.       If to OPTION GRANTOR, to:

                           IES Industries Inc.
                           IES Tower
                           200 First Street, S.E.
                           Cedar Rapids, Iowa 52401

                           Attention:  Lee Liu
                           Fax:  (319) 398-4204

                           with a copy to:

                           Winthrop, Stimson, Putnam & Roberts
                           One Battery Park Plaza


                                     - 17 -

<PAGE>

                           New York, New York  10004-1490

                           Attention:  Stephen R. Rusmisel, Esq.
                           Fax:  (212) 858-1500

                  18.  GOVERNING  LAW. This  Agreement  shall be governed by and
construed in  accordance  with the laws of the State of Delaware  applicable  to
agreements  made and to be  performed  entirely  within  such State and  without
regard to its choice of law principles or to any  requirement as to jurisdiction
or service of process contained in Section 2708 of Title 6 of the Delaware Code.

                  19. INTERPRETATION.

                  (a) When  reference  is made in this  Agreement  to  Articles,
Sections or Exhibits, such reference shall be to an Article,  Section or Exhibit
of this Agreement, as the case may be, unless otherwise indicated.

                  (b) The  table of  contents  and  headings  contained  in this
Agreement are for reference purposes and shall not affect in any way the meaning
or interpretation of the Agreement.

                  (c) Whenever the words  "include,"  "includes," or "including"
are used in this  Agreement,  they shall be deemed to be  followed  by the words
"without limitation."

                  (d)  Whenever  "or"  is used in this  Agreement  it  shall  be
construed in the nonexclusive sense.

                  20.  COUNTERPARTS;  EFFECT.  This Agreement may be executed in
one or more counterparts,  each of which shall be deemed to be an original,  but
all of which shall constitute one and the same agreement.

                  21. AMENDMENTS;  WAIVER.  This Agreement may be amended by the
parties  hereto and the terms and  conditions  hereof  may be waived  only by an
instrument in writing signed on behalf of each of the parties hereto, or, in the
case of a waiver,  by an  instrument  signed  on  behalf  of the  party  waiving
compliance.

                  22. EXTENSION OF TIME PERIODS.  The time periods for exercises
of certain  rights under  Sections 2, 7 and 8 shall be extended (but in no event
by more than six months):

                  (a) to the extent necessary to obtain all regulatory approvals
for the exercise of such rights, and for the expiration of all statutory waiting
periods; and

                  (b) to the  extent  necessary  to avoid  any  liability  under
Section 16(b) of the Exchange Act by reason of such exercise.

                                     - 18 -

<PAGE>

                      THIS SPACE INTENTIONALLY LEFT BLANK





                                     - 19 -

<PAGE>


                  IN WITNESS  WHEREOF,  the  parties  hereto  have  caused  this
Agreement to be executed by their respective duly authorized  officers as of the
date first above written.

                                           IES INDUSTRIES INC.


                                           By:/s/ LEE LIU
                                              ------------
                                              Name:   Lee Liu
                                              Title:  Chairman of the Board,
                                                       President and Chief
                                                       Executive Officer


                                            INTERSTATE POWER COMPANY


                                            By:/s/ WAYNE H. STOPPELMOOR
                                               ------------------------
                                               Name:   Wayne H. Stoppelmoor
                                               Title:  President, Chief 
                                                        Executive Officer and
                                                        Chairman of the Board




                                     - 20 -

<PAGE>

                                                                       EXHIBIT E


                   OPTION GRANTOR/OPTION HOLDER STOCK OPTION
                         AND TRIGGER PAYMENT AGREEMENT


                  This STOCK  OPTION  AGREEMENT,  dated as of November  10, 1995
(the "Agreement") by and among Interstate Power Company, a corporation organized
under the laws of the State of Delaware  ("OPTION GRANTOR" or the "Company") and
WPL  Holdings,  Inc.,  a  corporation  organized  under the laws of the State of
Wisconsin ("OPTION HOLDER").

                          W I T N E S S E T H   T H A T:

                  WHEREAS,  concurrently with the execution and delivery of this
Agreement,  OPTION GRANTOR,  OPTION HOLDER,  IES Industries  Inc., a corporation
organized  under the laws of the  State of Iowa  ("IES"),  and AMW  Acquisition,
Inc., a wholly-owned subsidiary of OPTION HOLDER organized under the laws of the
State of Delaware  ("AMW"),  are entering  into an Agreement and Plan of Merger,
dated as of November 10, 1995, (the "Merger Agreement"),  which provides,  inter
alia,  upon the terms and subject to the conditions  thereof,  for the merger of
IES with and into  OPTION  HOLDER in  accordance  with the laws of the States of
Wisconsin  and Iowa  (the  "IES  Merger"),  and the  merger of AMW with and into
OPTION  GRANTOR  in  accordance  with the laws of the  State  of  Delaware  (the
"Interstate Merger", and together with the IES Merger, the "Merger");

                  WHEREAS,  in  connection  with  the  execution  of the  Merger
Agreement, OPTION GRANTOR, OPTION HOLDER and IES are entering into certain stock
option  agreements dated as of the date hereof,  of which this Agreement is one,
whereby the parties  hereto  grant each other an option with  respect to certain
shares of each other's  common stock on the terms and subject to the  conditions
set forth therein (the "Stock Option Agreements"); and

                  WHEREAS,  as a condition  to OPTION  HOLDER's  willingness  to
enter into the Merger Agreement, OPTION HOLDER has requested that OPTION GRANTOR
agree,  and OPTION  GRANTOR has so agreed,  to grant to OPTION  HOLDER an option
with respect to certain shares of OPTION  GRANTOR's  common stock,  on the terms
and subject to the conditions set forth herein;

                  NOW,  THEREFORE,  to induce  OPTION  HOLDER to enter  into the
Merger   Agreement  and  certain  of  the  Stock  Option   Agreements,   and  in
consideration  of the  representations,  warranties,  covenants  and  agreements
contained  herein, in the Merger Agreement and in the Stock Option Agreements to
which OPTION GRANTOR and OPTION

<PAGE>

HOLDER are parties,  the parties hereto,  intending to be legally bound,  hereby
agree as follows:

                  1. GRANT OF OPTION.

                  (a) Subject to the  receipt of all  regulatory  approvals  and
orders  required  by  OPTION  GRANTOR  as set  forth in  Section  6.4(c)  of the
Interstate  Disclosure  Schedule to the Merger Agreement and by OPTION HOLDER as
set  forth in  Section  4.4(c)  of the WPL  Disclosure  Schedule  to the  Merger
Agreement, OPTION GRANTOR hereby grants OPTION HOLDER an irrevocable option (the
"OPTION  GRANTOR  Option") to  purchase up to that number of shares,  subject to
adjustment as provided in Section 12 (the "OPTION  GRANTOR  Shares"),  of common
stock,  par value $3.50 per share, of OPTION GRANTOR (the "OPTION GRANTOR Common
Stock") equal to a percentage  (the "Option  Shares  Percentage"),  which Option
Shares  Percentage is equal to the OPTION HOLDER's  Participation  Percentage as
defined below in subsection  (e), of 1,903,293  shares of OPTION  GRANTOR Common
Stock (being 19.9% of the number of shares of OPTION GRANTOR Common Stock issued
and outstanding as of November 10, 1995, the "Initial Number") in the manner set
forth  below,  at a price (the  "Exercise  Price") per OPTION  GRANTOR  Share of
$28.9375 (which is equal to the Fair Market Value (as defined below) of a OPTION
GRANTOR Share as of the date hereof).

                  (b) The Exercise  Price shall be payable,  at OPTION  HOLDER's
option, as follows:

                           (i)   in cash, or

                           (ii)  subject to the receipt of all  approvals of any
         Governmental  Authority  required  for OPTION  GRANTOR to acquire,  and
         OPTION HOLDER to issue,  the OPTION  HOLDER  Shares (as defined  below)
         from  OPTION  HOLDER,  in shares of common  stock,  $.01 par value,  of
         OPTION HOLDER ("OPTION HOLDER Shares"),

in either case in accordance with Section 4 hereof.

                  (c)  Notwithstanding  the  foregoing,  in no event  shall  the
number  of  OPTION  GRANTOR  Shares  for  which  the  OPTION  GRANTOR  Option is
exercisable  exceed the product of the Option Shares  Percentage and the Initial
Number, subject to adjustment as provided in Section 12.

                  (d) As used herein, the "Fair Market Value" of any share shall
be the average of the daily  closing  sales price for such share on the New York
Stock  Exchange (the "NYSE") during the ten NYSE trading days prior to the fifth
NYSE trading day preceding the date such Fair Market Value is to be determined.

                  (e) For  purposes of this  Agreement  the term  "Participation
Percentage"  shall have the same meaning as in Section  10.3(f)(i) of the Merger
Agreement,  except that the numerator and denominator  shall be calculated based
on the number of shares of WPL

                                     - 2 -

<PAGE>

Common  Stock which would be issuable  (or, in the case of WPL,  retained by its
shareholders) on a fully diluted basis had the Effective Time occurred as of the
date on which the  Exercise  Notice is delivered  under  Section 2 hereof or the
date on which demand for the Trigger  Payment (as defined herein) is given under
Section 5 hereof,  as the case may be. Other  capitalized  terms used herein but
not defined herein shall have the meanings set forth in the Merger Agreement.

                  2. EXERCISE OF OPTION.

                  (a) The  OPTION  GRANTOR  Option  may be  exercised  by OPTION
HOLDER,  in whole or in part,  at any time or from time to time after the Merger
Agreement becomes  terminable by OPTION HOLDER under  circumstances  which could
entitle OPTION HOLDER to a termination  fee under Section  10.3(a) of the Merger
Agreement  (provided that the events specified in Section  10.3(a)(ii)(A) of the
Merger  Agreement shall have occurred,  although the events specified in Section
10.3(a)(ii)(B) thereof need not have occurred), or Section 10.3(b) of the Merger
Agreement  (regardless of whether the Merger Agreement is actually terminated or
whether  there occurs a closing of any Business  Combination  involving a Target
Party or a closing by which a Target Party becomes a Subsidiary), any such event
by which the Merger  Agreement  becomes so  terminable  by OPTION  HOLDER  being
referred to herein as a "Trigger Event").

                  (b) (i) OPTION GRANTOR shall notify OPTION HOLDER  promptly in
         writing of the  occurrence of any Trigger  Event,  it being  understood
         that the  giving  of such  notice  by  OPTION  GRANTOR  shall  not be a
         condition to the right of OPTION HOLDER to exercise the OPTION  GRANTOR
         Option.

                           (ii) In the event  OPTION  HOLDER  wishes to exercise
         the  OPTION  GRANTOR  Option,  OPTION  HOLDER  shall  deliver to OPTION
         GRANTOR  written  notice (an "Exercise  Notice")  specifying  the total
         number of OPTION GRANTOR Shares it wishes to purchase.

                           (iii)  Upon the  giving  by  OPTION  HOLDER to OPTION
         GRANTOR  of the  Exercise  Notice  and  the  tender  of the  applicable
         aggregate Exercise Price, OPTION HOLDER, to the extent permitted by law
         and OPTION GRANTOR's  organizational  documents,  and provided that the
         conditions to OPTION  GRANTOR's  obligation to issue the OPTION GRANTOR
         Shares  to OPTION  HOLDER  hereunder  set forth in  Section 3 have been
         satisfied or waived,  shall be deemed to be the holder of record of the
         OPTION GRANTOR Shares issuable upon such exercise, notwithstanding that
         the stock transfer books of OPTION GRANTOR shall then be closed or that
         certificates  representing such OPTION GRANTOR Shares shall not then be
         actually delivered to OPTION HOLDER.

                           (iv) Each  closing  of a purchase  of OPTION  GRANTOR
         Shares (a "Closing")  shall occur at a place,  on a date, and at a time
         designated  by OPTION HOLDER in an Exercise  Notice  delivered at least
         two business days prior to the date of the Closing.

                                     - 3 -

<PAGE>

                  (c)  The  OPTION  GRANTOR  Option  shall  terminate  upon  the
earliest to occur of:

                           (i)  the Effective Time of the Merger;

                           (ii) the termination of the Merger Agreement pursuant
         to Section  10.1  thereof,  other than under  circumstances  which also
         constitute a Trigger Event under this Agreement;

                           (iii) 180  days  following  any  termination  of the
         Merger  Agreement upon or during the continuance of a Trigger Event (or
         if, at the expiration of such 180 day period, the OPTION GRANTOR Option
         cannot  be  exercised  by reason of any  applicable  judgment,  decree,
         order,  law or regulation,  ten business days after such  impediment to
         exercise  shall have been  removed or shall have  become  final and not
         subject to appeal,  but in no event under this clause  (iii) later than
         May 10, 1998); and

                           (iv) payment by OPTION GRANTOR of the Trigger Payment
         set forth in Section 5 of this Agreement to OPTION HOLDER.

                  (d) Notwithstanding  the foregoing,  the OPTION GRANTOR Option
may not be  exercised if (i) OPTION  HOLDER is in material  breach of any of its
representations or warranties,  or in material breach of any of its covenants or
agreements,  contained in this Agreement or in the Merger  Agreement,  or (ii) a
Trigger  Payment has been paid pursuant to Section 5 of this Agreement or demand
therefor has been made and not withdrawn.

                  3. CONDITIONS TO CLOSING.  The obligation of OPTION GRANTOR to
issue the OPTION  GRANTOR  Shares to OPTION  HOLDER  hereunder is subject to the
conditions that

                  (a) all waiting periods,  if any, under the HSR Act applicable
to the issuance and  acquisition of the OPTION GRANTOR  Shares  hereunder  shall
have expired or have been terminated;

                  (b) the OPTION  GRANTOR  Shares,  and any OPTION HOLDER Shares
which are issued in payment of the Exercise Price,  shall have been approved for
listing on the NYSE subject only to official notice of issuance;

                  (c) all consents,  approvals,  orders or authorizations of, or
registrations,  declarations  or  filings  with,  any  federal,  state  or local
administrative   agency  or  commission  or  other   federal,   state  or  local
Governmental  Authority,  if any,  required in  connection  with the issuance by
OPTION GRANTOR and the acquisition by OPTION HOLDER of the OPTION GRANTOR Shares
hereunder shall have been obtained or made, including,  without limitation,  the
approval  of the SEC  under  Sections  9 and 10 of the  Public  Utility  Holding
Company Act of 1935, as amended (the "1935 Act"), the approval of Iowa Utilities
Board,  the Public  Service  Commission of Minnesota  and the Illinois  Commerce
Commission of the issuance of the OPTION  GRANTOR  Shares by OPTION GRANTOR and,
if applicable, the

                                     - 4 -

<PAGE>

acquisition of OPTION  GRANTOR Shares by OPTION HOLDER,  and the approval of the
Public Service  Commission of Wisconsin of the acquisition of the OPTION GRANTOR
Shares by OPTION HOLDER and, if applicable, the acquisition by OPTION GRANTOR of
the OPTION HOLDER Shares constituting the Exercise Price hereunder; and

                  (d) no preliminary  or permanent  injunction or other order by
any court of competent  jurisdiction  prohibiting or otherwise  restraining such
issuance shall be in effect.

The condition set forth in paragraph (b) above may be waived by OPTION  GRANTOR,
in the case of OPTION HOLDER Shares, and by OPTION HOLDER, in the case of OPTION
GRANTOR Shares, in the sole discretion of the waiving party.

                  4. CLOSING. At any Closing,

                  (a)  OPTION  GRANTOR  shall  deliver  to OPTION  HOLDER or its
designee a single  certificate  in definitive  form  representing  the number of
OPTION GRANTOR Shares  designated by OPTION HOLDER in its Exercise Notice,  such
certificate to be registered in the name of OPTION HOLDER and to bear the legend
set forth in Section 13; and

                  (b)  OPTION  HOLDER  shall  deliver  to  OPTION   GRANTOR  the
aggregate  price for the OPTION GRANTOR Shares so designated and being purchased
by

                           (i) wire transfer of immediately  available  funds or
         certified check or bank check, or

                           (ii) subject to the  condition  in Section  1(b)(ii),
         delivery of a certificate or  certificates  representing  the number of
         OPTION  HOLDER  Shares being issued by OPTION  HOLDER in  consideration
         thereof, determined in accordance with Section 4(c).

                  (c) In the event  that  OPTION  HOLDER  issues  OPTION  HOLDER
Shares to OPTION GRANTOR in  consideration  of OPTION GRANTOR Shares pursuant to
Section  4(b)(ii),  the number of OPTION  HOLDER Shares to be so issued shall be
equal to the quotient obtained by dividing:

                           (i) the  product of (x) the number of OPTION  GRANTOR
         Shares  with  respect  to which  the  OPTION  GRANTOR  Option  is being
         exercised and (y) the Exercise Price, by

                           (ii)  the Fair  Market  Value  of the  OPTION  HOLDER
         Shares  as of the date  immediately  preceding  the  date the  Exercise
         Notice is delivered to OPTION GRANTOR.

                  (d) OPTION  GRANTOR  shall pay all  expenses,  and any and all
Federal,  state  and  local  taxes  and other  charges  that may be  payable  in
connection with the preparation,  issue and delivery of stock certificates under
this Section 4.

                                     - 5 -

<PAGE>

                  5. TRIGGER PAYMENT.

                  (a)  Trigger  Payment.  Subject to the  provisions  of Section
10.3(e) of the Merger Agreement,  if a Trigger Event shall have occurred and any
regulatory approval or order required for the issuance by OPTION GRANTOR, or the
acquisition by OPTION HOLDER, of the OPTION GRANTOR Option pursuant to Section 1
hereof  shall not have been  obtained,  OPTION  HOLDER  shall  have the right to
receive,  and OPTION GRANTOR shall pay to OPTION HOLDER, an amount (the "Trigger
Payment") equal to the product of

                           (i) the maximum  number of OPTION GRANTOR Shares that
         would have been subject to purchase by OPTION  HOLDER upon  exercise of
         the OPTION  GRANTOR  Option  pursuant to Sections 1 and 2 hereof if all
         such regulatory approvals or orders had been obtained, and

                           (ii)  the  difference  between  (A) the  Market/Offer
         Price (as defined herein), determined as of the date on which notice of
         demand for the Trigger  Payment is given by OPTION HOLDER,  and (B) the
         Exercise Price (but only if such Market/Offer Price is higher than such
         Exercise Price).

Demand for the Trigger  Payment shall be given by notice in accordance  with the
provisions  of Section 17 hereof.  The Trigger  Payment  shall be paid to OPTION
HOLDER by OPTION  GRANTOR  on the  Payment  Date (as  defined  herein),  by wire
transfer  of  immediately  available  funds to an  account to be  designated  in
writing by OPTION  HOLDER not less than two  business  days  before the  Payment
Date.

                  (b) Payment  Date.  For purposes of this  Section 5,  "Payment
Date" means the date on which termination fees are required to be paid by OPTION
GRANTOR to OPTION HOLDER under Sections 10.3(a) or 10.3(b),  as the case may be,
of the Merger  Agreement  as a result of the  occurrence  of the  Trigger  Event
referred to in subsection (a) of this Section 5.

                  (c)  Certain   Conditions.   OPTION   GRANTOR  shall  have  no
obligation to pay the Trigger  Payment if OPTION HOLDER is in material breach of
any of its  representations  or warranties,  or in material breach of any of its
covenants or agreements, contained in this Agreement or in the Merger Agreement.

                  6.  REPRESENTATIONS  AND WARRANTIES OF OPTION GRANTOR.  OPTION
GRANTOR represents and warrants to OPTION HOLDER that

                  (a)  Except as set forth in Section  6.4(a) of the  Interstate
Disclosure  Schedule to the Merger  Agreement,  OPTION GRANTOR has the corporate
power  and  authority  to  enter  into  this  Agreement  and to  carry  out  its
obligations  hereunder,  subject  in the case of the  repurchase  of the  OPTION
GRANTOR Shares  pursuant to Section 8(a) to applicable law and the provisions of
OPTION  GRANTOR's  Articles of  Incorporation,  as amended (the "OPTION  GRANTOR
Articles");

                                     - 6 -

<PAGE>

                  (b) this  Agreement  has been duly and  validly  executed  and
delivered by OPTION GRANTOR, and, assuming the due authorization,  execution and
delivery  hereof by OPTION  HOLDER and the  receipt of all  required  regulatory
approvals,  constitutes  a valid  and  binding  obligation  of  OPTION  GRANTOR,
enforceable  against OPTION GRANTOR in accordance with its terms,  except as may
be limited by applicable bankruptcy, insolvency, reorganization or other similar
laws affecting the enforcement of creditors' rights  generally,  and except that
the availability of equitable remedies,  including specific performance,  may be
subject to the discretion of any court before which any proceeding  therefor may
be brought;

                  (c) OPTION GRANTOR has taken all necessary corporate action to
authorize  and reserve for issuance and to permit it to issue,  upon exercise of
the OPTION  GRANTOR  Option,  and at all times from the date hereof  through the
expiration of the OPTION GRANTOR  Option will have reserved,  the Initial Number
of authorized and unissued OPTION GRANTOR  Shares,  such amount being subject to
adjustment  as  provided in Section 12, all of which,  upon their  issuance  and
delivery  in  accordance  with  the  terms  of  this  Agreement,  will  be  duly
authorized, validly issued, fully paid and nonassessable;

                  (d) upon  delivery  of the  OPTION  GRANTOR  Shares  to OPTION
HOLDER  upon the  exercise  of the OPTION  GRANTOR  Option,  OPTION  HOLDER will
acquire the OPTION GRANTOR Shares free and clear of all claims,  liens, charges,
encumbrances and security interests of any nature whatsoever;

                  (e) except as  described in Section  6.4(b) of the  Interstate
Disclosure Schedule to the Merger Agreement,  the execution and delivery of this
Agreement by OPTION GRANTOR does not, and, subject to compliance with applicable
law and the OPTION GRANTOR Articles with respect to the repurchase of the OPTION
GRANTOR Shares  pursuant to Section 8(a), the  consummation by OPTION GRANTOR of
the transactions contemplated hereby will not, violate, conflict with, or result
in a breach of any provision of, or constitute a default (with or without notice
or a lapse  of time,  or both)  under,  or  result  in the  termination  of,  or
accelerate  the  performance  required by, or result in a right of  termination,
cancellation,  or  acceleration  of any  obligation  or the  loss of a  material
benefit under,  or the creation of a lien,  pledge,  security  interest or other
encumbrance  on  assets  (any  such  conflict,   violation,  default,  right  of
termination,  cancellation,   acceleration,  loss  or  creation,  hereinafter  a
"Violation") of OPTION GRANTOR or any of its Subsidiaries, pursuant to

                           (i) any provision of the OPTION  GRANTOR  Articles or
         the Bylaws of OPTION GRANTOR,

                           (ii) any  provisions  of any material  loan or credit
         agreement,  note,  mortgage,  indenture,  lease,  benefit plan or other
         agreement,  obligation,  instrument,  permit, concession,  franchise or
         license  (any of the  foregoing  in  effect  on the date  hereof  being
         referred  to  as a  "Material  Contract")  of  OPTION  GRANTOR  or  its
         subsidiaries or to which any of them is a party, or

                           (iii) any  judgment,  order,  decree,  statute,  law,
         ordinance,  rule or  regulation  applicable  to OPTION  GRANTOR  or its
         properties or assets,

                                     - 7 -

<PAGE>

which Violation, in the case of each clauses (ii) and (iii), could reasonably be
expected to have an OPTION  GRANTOR  Material  Adverse  Effect  (except  that no
representation  or  warranty is given  concerning  any  Violation  of a Material
Contract with respect to the  repurchase of OPTION  GRANTOR  Shares  pursuant to
Section 8(a));

                  (f) except as  described in Section  6.4(c) of the  Interstate
Disclosure  Schedule  to the  Merger  Agreement  or  Section 1 or 3 hereof,  the
execution  and delivery of this  Agreement  by OPTION  GRANTOR does not, and the
performance of this  Agreement by OPTION GRANTOR will not,  require any consent,
approval,  authorization  or permit  of,  filing  with or  notification  to, any
Governmental Authority;

                  (g) none of OPTION  GRANTOR,  any of its  affiliates or anyone
acting on its or their  behalf,  has  issued,  sold or offered  any  security of
OPTION GRANTOR to any person under  circumstances  that would cause the issuance
and sale of OPTION GRANTOR Shares,  as  contemplated  by this  Agreement,  to be
subject to the  registration  requirements of the Securities Act as in effect on
the date hereof,  and,  assuming the  representations  and  warranties of OPTION
HOLDER  contained in Section 7(g) are true and correct,  the issuance,  sale and
delivery  of the  OPTION  GRANTOR  Shares  hereunder  would be  exempt  from the
registration and prospectus  delivery  requirements of the Securities Act, as in
effect on the date hereof (and OPTION  GRANTOR  shall not take any action  which
would cause the issuance,  sale, and delivery of OPTION GRANTOR Shares hereunder
not to be exempt from such requirements); and

                  (h)  any  OPTION  HOLDER  Shares  acquired  pursuant  to  this
Agreement  will be acquired for OPTION  GRANTOR's  own account,  for  investment
purposes  only,  and will not be acquired by OPTION  GRANTOR  with a view to the
public  distribution  thereof in  violation of any  applicable  provision of the
Securities Act.

                  7.  REPRESENTATIONS  AND WARRANTIES OF OPTION  HOLDER.  OPTION
HOLDER represents and warrants to OPTION GRANTOR that

                  (a)  Except  as set  forth  in  Schedule  4.4(a)  of  the  WPL
Disclosure  Schedule to the Merger  Agreement,  OPTION  HOLDER has the corporate
power  and  authority  to  enter  into  this  Agreement  and to  carry  out  its
obligations hereunder;

                  (b) this  Agreement  has been duly and  validly  executed  and
delivered by OPTION HOLDER and,  assuming the due  authorization,  execution and
delivery  hereof by OPTION  GRANTOR and the receipt of all  required  regulatory
approvals,  constitutes  a  valid  and  binding  obligation  of  OPTION  HOLDER,
enforceable  against  OPTION HOLDER in  accordance  with its  respective  terms,
except as may be limited by applicable bankruptcy,  insolvency,  reorganization,
or other similar laws affecting the enforcement of creditors'  rights generally,
and except that the  availability  of  equitable  remedies,  including  specific
performance,  may be subject to the  discretion  of any court  before  which any
proceeding may be brought;

                  (c)  prior  to  any  delivery  of  OPTION   HOLDER  Shares  in
consideration of the purchase of OPTION GRANTOR Shares pursuant  hereto,  OPTION
HOLDER will have

                                     - 8 -

<PAGE>

taken all necessary  corporate action to authorize for issuance and to permit it
to issue such  OPTION  HOLDER  Shares,  all of which,  upon their  issuance  and
delivery  in  accordance  with  the  terms  of  this  Agreement,  will  be  duly
authorized,  validly issued,  fully paid and nonassessable  (except as otherwise
provided in Section 180.0622(2)(b) of the WBCL);

                  (d) upon any delivery of such OPTION  HOLDER  Shares to OPTION
GRANTOR in  consideration  of the  purchase of OPTION  GRANTOR  Shares  pursuant
hereto,  OPTION  GRANTOR will acquire the OPTION HOLDER Shares free and clear of
all claims,  liens,  charges,  encumbrances and security interests of any nature
whatsoever;

                  (e)  except  as  described  in  Section   4.4(b)  of  the  WPL
Disclosure Schedule to the Merger Agreement,  the execution and delivery of this
Agreement by OPTION  HOLDER does not, and the  consummation  by OPTION HOLDER of
the transactions contemplated hereby will not, violate, conflict with, or result
in the breach of any  provision  of, or  constitute  a default  (with or without
notice or a lapse of time, or both) under,  or result in any Violation by OPTION
HOLDER or any of its Subsidiaries, pursuant to

                           (i) any provision of the Articles of Incorporation or
         Bylaws of OPTION HOLDER,

                           (ii) any Material Contract of OPTION HOLDER or any of
         its subsidiaries or to which any of them is a party, or

                           (iii) any  judgment,  order,  decree,  statute,  law,
         ordinance,  rule or  regulation  applicable  to  OPTION  HOLDER  or its
         properties or assets,

which  Violation,  in the case of each of clauses  (ii) or (iii),  would have an
OPTION HOLDER Material Adverse Effect;

                  (f)  except  as  described  in  Section   4.4(c)  of  the  WPL
Disclosure  Schedule  to the  Merger  Agreement  or  Section 1 or 3 hereof,  the
execution  and  delivery of this  Agreement  by OPTION  HOLDER does not, and the
consummation by OPTION HOLDER of the transactions  contemplated hereby will not,
require  any  consent,  approval,  authorization  or permit of,  filing  with or
notification to, any Governmental Authority; and

                  (g) any OPTION  GRANTOR  Shares  acquired upon exercise of the
OPTION  GRANTOR  Option will be acquired for OPTION  HOLDER's  own account,  for
investment  purposes only and will not be, and the OPTION  GRANTOR Option is not
being, acquired by OPTION HOLDER with a view to the public distribution thereof,
in violation of any applicable provision of the Securities Act.

                  8.  CERTAIN REPURCHASES.

                  (a) OPTION  HOLDER  "PUT".  At the request of OPTION HOLDER by
written  notice  (x) at any time  during  which  the  OPTION  GRANTOR  Option is
exercisable pursuant to Section 2 (the "Repurchase Period"),  OPTION GRANTOR (or
any successor  entity thereof) shall, if permitted by applicable law, the OPTION
GRANTOR Articles and

                                     - 9 -

<PAGE>

Bylaws and OPTION GRANTOR's  Material  Contracts,  repurchase from OPTION HOLDER
all or any  portion  of the  OPTION  GRANTOR  Option,  at the price set forth in
subparagraph (i) below, or, (y) at any time prior to May 10, 1997 (provided that
such date shall be extended to May 10,  1998 under the  circumstances  where the
date after which either party may  terminate  the Merger  Agreement  pursuant to
Section  10.1(b) of the Merger  Agreement  has been  extended to May 10,  1998),
OPTION  GRANTOR  (or any  successor  entity  thereof)  shall,  if  permitted  by
applicable  law, the OPTION  GRANTOR  Articles  and Bylaws and OPTION  GRANTOR's
Material  Contracts,  repurchase  from  OPTION  HOLDER all or any portion of the
OPTION GRANTOR Shares  purchased by OPTION HOLDER pursuant to the OPTION GRANTOR
Option, at the price set forth in subparagraph (ii) below:

                         (i) (A) The difference between the "Market/Offer Price"
         (as defined  below) for shares of OPTION GRANTOR Common Stock as of the
         date OPTION  HOLDER  gives  notice of its intent to exercise its rights
         under this Section 8 and the Exercise  Price,  multiplied by the number
         of OPTION  GRANTOR  Shares  purchasable  pursuant to the OPTION GRANTOR
         Option (or  portion  thereof  with  respect to which  OPTION  HOLDER is
         exercising   its  rights  under  this  Section  8),  but  only  if  the
         Market/Offer Price is greater than the Exercise Price.

                           (B) for  purposes  of this  Agreement,  "Market/Offer
         Price")  shall  mean,  as of any date,  the higher of (I) the price per
         share offered as of such date pursuant to any tender or exchange  offer
         or other offer with respect to a Business Combination  involving OPTION
         GRANTOR as the Target  Party  which was made prior to such date and not
         terminated  or withdrawn as of such date and (II) the Fair Market Value
         of OPTION GRANTOR Common Stock as of such date.

                        (ii) (A) the product of (I) the sum of (a) the  Exercise
         Price paid by OPTION HOLDER per OPTION GRANTOR Share acquired  pursuant
         to the OPTION GRANTOR Option, and (b) the difference between the "Offer
         Price" (as defined below) and the Exercise Price, but only if the offer
         Price is greater that the Exercise Price, and (II) the number of OPTION
         GRANTOR Shares so to be repurchased pursuant to this Section 8.

                           (B) For  purposes  of this  clause  (ii),  the "Offer
         Price"  shall be the  highest  price per share  offered  pursuant  to a
         tender or exchange offer or other Business  Combination offer involving
         OPTION GRANTOR as the Target Party during the  Repurchase  Period prior
         to the delivery by OPTION HOLDER of a notice of repurchase.

                  (b) REDELIVERY OF OPTION HOLDER SHARES. If OPTION HOLDER shall
have  previously  elected to  purchase  OPTION  GRANTOR  Shares  pursuant to the
exercise of the OPTION  GRANTOR  Option by the  issuance  and delivery of OPTION
HOLDER Shares,  then OPTION GRANTOR shall, if so requested by OPTION HOLDER,  in
fulfillment of its obligation pursuant to Section 8(a)(y) (that is, with respect
to the  Exercise  Price only and without  limitation  to its  obligation  to pay
additional consideration under clause (b) of Section 8(a)(ii)(A)(I)),  redeliver
the certificates for such OPTION HOLDER Shares to OPTION HOLDER,  free and clear
of all liens, claims, charges and encumbrances of any

                                     - 10 -

<PAGE>

kind or nature whatsoever;  provided, however, that if at any time less than all
of the OPTION  GRANTOR  Shares so  purchased  by OPTION  HOLDER  pursuant to the
OPTION  GRANTOR  Option are to be  repurchased  by OPTION  GRANTOR  pursuant  to
Section  8(a)(y),  then (i) OPTION  GRANTOR  shall be  obligated to redeliver to
OPTION HOLDER the same  proportion of such OPTION HOLDER Shares as the number of
OPTION GRANTOR Shares that OPTION GRANTOR is then obligated to repurchase  bears
to the number of OPTION GRANTOR  Shares  acquired by OPTION HOLDER upon exercise
of the  OPTION  GRANTOR  Option and (ii)  OPTION  HOLDER  shall  issue to OPTION
GRANTOR new certificates  representing  those OPTION HOLDER Shares which are not
due to be  redelivered  to OPTION  HOLDER  pursuant to this  Section 8(b) to the
extent  that  excess  OPTION  HOLDER  Shares are  included  in the  certificates
redelivered to OPTION HOLDER by OPTION GRANTOR.

                  (c)  PAYMENT  AND  REDELIVERY  OF OPTION  GRANTOR  OPTIONS  OR
SHARES.  In the event OPTION  HOLDER  exercises its rights under this Section 8,
OPTION  GRANTOR  shall,  within ten business days  thereafter,  pay the required
amount to OPTION HOLDER in immediately  available  funds and OPTION HOLDER shall
surrender to OPTION  GRANTOR the OPTION  GRANTOR  Option or the  certificate  or
certificates  evidencing the OPTION  GRANTOR  Shares  purchased by OPTION HOLDER
pursuant hereto, and OPTION HOLDER shall warrant that it owns the OPTION GRANTOR
Option or such shares and that the OPTION GRANTOR Option or such shares are then
free and clear of all liens,  claims,  damages,  charges and encumbrances of any
kind or nature whatsoever.

                  (d) OPTION  HOLDER  "CALL".  If OPTION  HOLDER has  elected to
purchase  OPTION GRANTOR  Shares  pursuant to the exercise of the OPTION GRANTOR
Option by the  issuance and delivery of OPTION  HOLDER  Shares,  notwithstanding
that OPTION  HOLDER may no longer hold any such  OPTION  GRANTOR  Shares or that
OPTION  HOLDER  elects not to exercise  its other  rights  under this Section 8,
OPTION  HOLDER  may  require,  at any time or from time to time prior to May 10,
1997  (provided  that such date  shall be  extended  to May 10,  1998  under the
circumstances  where the date after which either party may  terminate the Merger
Agreement  pursuant to Section 10.1(b) of the Merger Agreement has been extended
to May 10, 1998), OPTION GRANTOR to sell to OPTION HOLDER any such OPTION HOLDER
Shares at the price  attributed to such OPTION HOLDER Shares pursuant to Section
4 plus  interest  at the rate of 8.75% per annum on such amount from the Closing
Date relating to the exchange of such OPTION HOLDER Shares pursuant to Section 4
to the Closing Date under this  Section  8(d) less any  dividends on such OPTION
HOLDER Shares paid during such period or declared and payable to stockholders of
record on a date during such period.

                  (e) REPURCHASE PRICE REDUCED AT OPTION HOLDER'S OPTION. In the
event the repurchase  price specified in Section 8(a) would subject the purchase
of the OPTION GRANTOR  Option or the OPTION  GRANTOR Shares  purchased by OPTION
HOLDER  pursuant to the OPTION GRANTOR Option to a vote of the  shareholders  of
OPTION GRANTOR pursuant to applicable law or the OPTION GRANTOR  Articles,  then
OPTION HOLDER may, at its  election,  reduce the  repurchase  price to an amount
which would permit such repurchase  without the necessity for such a shareholder
vote.

                                     - 11 -

<PAGE>

                  9.  VOTING OF SHARES.  Following  the date hereof and prior to
the fifth  anniversary of the date hereof (the  "Expiration  Date"),  each party
shall vote any shares of capital stock of the other party acquired by such party
pursuant to this Agreement  ("Restricted  Shares"),  including any OPTION HOLDER
Shares issued pursuant to Section 1(b), or otherwise  beneficially owned (within
the meaning of Rule 13d-3 promulgated under the Securities Exchange Act of 1934,
as amended (the "Exchange  Act")),  by such party on each matter  submitted to a
vote of shareholders of such other party for and against such matter in the same
proportion as the vote of all other  shareholders  of such other party are voted
(whether by proxy or otherwise) for and against such matter.

                  10.  RESTRICTIONS ON TRANSFER.

                  (a)  RESTRICTIONS ON TRANSFER.  Prior to the Expiration  Date,
neither party shall,  directly or indirectly,  by operation of law or otherwise,
sell, assign,  pledge, or otherwise dispose of or transfer any Restricted Shares
beneficially  owned by such party, other than (i) pursuant to Section 8, or (ii)
in accordance with Section 10(b) or Section 11.

                  (b) PERMITTED  SALES.  Following the termination of the Merger
Agreement, a party shall be permitted to sell any Restricted Shares beneficially
owned by it if such sale is made pursuant to a tender or exchange offer that has
been approved or recommended,  or otherwise  determined to be fair to and in the
best  interests of the  shareholders  of the other  party,  by a majority of the
members of the Board of  Directors  of such other party,  which  majority  shall
include a majority of directors who were directors prior to the  announcement of
such tender or exchange offer.

                  11.  REGISTRATION RIGHTS.

                  (a) Following the termination of the Merger Agreement,  either
party hereto that owns Restricted Shares (a "Designated  Holder") may by written
notice (the "Registration Notice") to the other party (the "Registrant") request
the  Registrant  to  register  under the  Securities  Act all or any part of the
Restricted Shares beneficially owned by such Designated Holder (the "Registrable
Securities")  pursuant  to a  bona  fide  firm  commitment  underwritten  public
offering,  in which the Designated  Holder and the underwriters  shall effect as
wide a distribution of such Registrable  Securities as is reasonably practicable
and shall use their best efforts to prevent any person  (including any Group (as
used in Rule 13d-5 under the Exchange Act)) and its affiliates  from  purchasing
through  such  offering  Restricted  Shares  representing  more  than  1% of the
outstanding shares of common stock of the Registrant on a fully diluted basis (a
"Permitted Offering").

                  (b)  The  Registration  Notice  shall  include  a  certificate
executed by the Designated Holder and its proposed managing  underwriter,  which
underwriter  shall  be an  investment  banking  firm  of  nationally  recognized
standing (the "Manager"), stating that

                           (i) they  have a good  faith  intention  to  commence
         promptly a Permitted Offering, and

                                     - 12 -

<PAGE>

                           (ii) the manager in good faith believes  that,  based
         on the then-prevailing  market conditions,  it will be able to sell the
         Registrable  Securities  at a per share  price equal to at least 80% of
         the then Fair Market Value of such shares.

                  (c)  The  Registrant  (and/or  any  person  designated  by the
Registrant)  shall  thereupon  have the option  exercisable  by  written  notice
delivered to the Designated Holder within ten business days after the receipt of
the Registration Notice, irrevocably to agree to purchase all or any part of the
Registrable  Securities  proposed to be so sold for cash at a price (the "Option
Price") equal to the product of (i) the number of  Registrable  Securities to be
so  purchased  by the  Registrant  and (ii) the then Fair  Market  Value of such
shares.

                  (d) Any purchase of  Registrable  Securities by the Registrant
(or its  designee)  under Section 11(c) shall take place at a closing to be held
at the principal  executive  offices of the  Registrant or at the offices of its
counsel at any reasonable date and time designated by the Registrant and/or such
designee in such  notice  within  twenty  business  days after  delivery of such
notice,  and any  payment  for the  shares to be so  purchased  shall be made by
delivery at the time of such closing in immediately available funds.

                  (e) If the  Registrant  does not elect to exercise  its option
pursuant to this Section 11 with respect to all Registrable Securities, it shall
use its best efforts to effect,  as promptly as  practicable,  the  registration
under the Securities Act of the unpurchased  Registrable  Securities proposed to
be so sold; provided, however, that

                           (i)  neither  party  shall be entitled to demand more
         than an aggregate of two effective  registration  statements hereunder,
         and

                           (ii) the Registrant  will not be required to file any
         such registration statement during any period of time (not to exceed 40
         days after  such  request in the case of clause (A) below or 90 days in
         the case of clauses (B) and (C) below) when

                                (A) the  Registrant is in possession of material
                  non-public  information which it reasonably  believes would be
                  detrimental  to be  disclosed at such time and, in the opinion
                  of  counsel  to the  Registrant,  such  information  would  be
                  required to be  disclosed  if a  registration  statement  were
                  filed at that time;

                                (B)  the   Registrant  is  required   under  the
                  Securities Act to include audited financial statements for any
                  period  in such  registration  statement  and  such  financial
                  statements  are  not  yet  available  for  inclusion  in  such
                  registration statement; or

                                (C) the Registrant determines, in its reasonable
                  judgment,  that such  registration  would  interfere  with any
                  financing, acquisition or other material transaction involving
                  the Registrant or any of its affiliates.

                  (f) The Registrant  shall use its  reasonable  best efforts to
cause any Registrable  Securities  registered  pursuant to this Section 11 to be
qualified for sale under the securities

                                     - 13 -

<PAGE>

or Blue Sky laws of such  jurisdictions as the Designated  Holder may reasonably
request and shall continue such  registration or qualification in effect in such
jurisdiction;  provided,  however,  that the Registrant shall not be required to
qualify to do  business  in, or consent  to general  service of process  in, any
jurisdiction by reason of this provision.

                  (g) The  registration  rights set forth in this Section 11 are
subject to the condition that the Designated Holder shall provide the Registrant
with such information with respect to such holder's Registrable Securities,  the
plans for the distribution  thereof,  and such other information with respect to
such holder as, in the  reasonable  judgment of counsel for the  Registrant,  is
necessary to enable the Registrant to include in such registration statement all
material  facts  required  to  be  disclosed  with  respect  to  a  registration
thereunder.

                  (h) A  registration  effected  under this  Section 11 shall be
effected at the  Registrant's  expense,  except for  underwriting  discounts and
commissions  and the fees and the expenses of counsel to the Designated  Holder,
and  the  Registrant  shall  provide  to  the  underwriters  such  documentation
(including  certificates,   opinions  of  counsel  and  "comfort"  letters  from
auditors) as is customary in connection with  underwritten  public  offerings as
such underwriters may reasonably require.

                  (i) In connection  with any  registration  effected under this
Section 11, the parties agree

                           (i) to indemnify each other and the  underwriters  in
         the customary manner,

                           (ii) to enter into an underwriting  agreement in form
         and substance  customary for transactions of such type with the Manager
         and the other underwriters participating in such offering, and

                          (iii)  to take  all  further  actions  which  shall be
         reasonably necessary to effect such registration and sale (including if
         the   Manager   deems  it   necessary,   participating   in   road-show
         presentations).

                  (j) The  Registrant  shall  be  entitled  to  include  (at its
expense)  additional  shares  of its  common  stock in a  registration  effected
pursuant  to this  Section 11 only if and to the extent the  Manager  determines
that such inclusion will not adversely  affect the prospects for success of such
offering.

                  12.  ADJUSTMENT  UPON  CHANGES  IN   CAPITALIZATION.   Without
limitation to any  restriction on OPTION GRANTOR  contained in this Agreement or
in the Merger  Agreement,  in the event of any change in OPTION  GRANTOR  Common
Stock by reason of stock dividends,  splitups,  mergers (other than the Merger),
recapitalizations,  combinations,  exchange of shares or the like,  the type and
number of shares or securities  subject to the OPTION  GRANTOR  Option,  and the
purchase price per share provided in Section 1, shall be adjusted  appropriately
to  restore  to OPTION  HOLDER  its  rights  hereunder,  including  the right to
purchase from OPTION GRANTOR (or its successors) shares of OPTION GRANTOR Common
Stock (or such other shares or securities into which

                                     - 14 -

<PAGE>

OPTION GRANTOR Common Stock has been so changed)  representing the Option Shares
Percentage of the Initial  Number of shares of OPTION  GRANTOR  Common Stock for
the aggregate  Exercise  Price  calculated  as of the date of this  Agreement as
provided in Section 1.

                  13. RESTRICTIVE LEGENDS. Each certificate  representing OPTION
GRANTOR Shares issued to OPTION HOLDER  hereunder,  and OPTION HOLDER Shares, if
any,  delivered  to  OPTION  GRANTOR  at a  Closing,  shall  include a legend in
substantially the following form:

         THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED
         UNDER THE SECURITIES ACT OF 1933, AS AMENDED,  OR ANY STATE  SECURITIES
         OR BLUE SKY LAWS, AND MAY BE REOFFERED OR SOLD ONLY IF SO REGISTERED OR
         IF AN EXEMPTION FROM SUCH  REGISTRATION  IS AVAILABLE.  SUCH SECURITIES
         ARE ALSO SUBJECT TO ADDITIONAL RESTRICTIONS ON TRANSFER AS SET FORTH IN
         THE OPTION HOLDER STOCK OPTION AND TRIGGER PAYMENT AGREEMENT,  DATED AS
         OF NOVEMBER 10,  1995, A COPY OF WHICH MAY BE OBTAINED  FROM THE ISSUER
         UPON REQUEST.

It is understood and agreed that:

                           (i) the reference to the resale  restrictions  of the
         Securities  Act and  state  securities  or Blue Sky  laws in the  above
         legend  shall be  removed  by  delivery  of  substitute  certificate(s)
         without such reference if OPTION HOLDER or OPTION GRANTOR,  as the case
         may be, shall have delivered to the other party a copy of a letter from
         the staff of the SEC, or an opinion of counsel,  in form and  substance
         satisfactory  to the other party, to the effect that such legend is not
         required for purposes of the Securities Act or such laws;

                           (ii)  the   reference  to  the   provisions  to  this
         Agreement  in  the  above  legend  shall  be  removed  by  delivery  of
         substitute  certificate(s)  without  such  reference if the shares have
         been sold or  transferred  in  compliance  with the  provisions of this
         Agreement and under  circumstances that do not require the retention of
         such reference; and

                           (iii) the legend  shall be removed in its entirety if
         the  conditions  in  the  preceding  clauses  (i)  and  (ii)  are  both
         satisfied.

In addition, such certificates shall bear any other legend as may be required by
law.  Certificates  representing  shares sold in a  registered  public  offering
pursuant  to  Section 11 shall not be  required  to bear the legend set forth in
this Section 13.

                  14.   BINDING   EFFECT;   NO   ASSIGNMENT;   NO  THIRD   PARTY
BENEFICIARIES. (a) This Agreement shall be binding upon and inure to the benefit
of the parties hereto and their respective successors and permitted assigns.

                                     - 15 -

<PAGE>

                  (b)  Except  as  expressly  provided  for in  this  Agreement,
neither this  Agreement nor the rights or obligations of either party hereto are
assignable, except by operation of law, or with the written consent of the other
party.

                  (c) Nothing  contained in this Agreement,  express or implied,
is intended to confer  upon any person  other than the parties  hereto and their
respective  permitted assigns any rights or remedies of any nature whatsoever by
reason of this Agreement.

                  (d) Any Restricted  Shares sold by a party in compliance  with
the provisions of Section 11 shall,  upon  consummation of such sale, be free of
the restrictions  imposed with respect to such shares by this Agreement,  unless
and until such party shall  repurchase or otherwise  become the beneficial owner
of such shares,  and any  transferee of such shares shall not be entitled to the
registration rights of such party.

                  15.  SPECIFIC  PERFORMANCE.  The  parties  hereto  agree  that
irreparable  harm would  occur in the event that any of the  provisions  of this
Agreement were not performed in accordance  with their  specified  terms or were
otherwise  breached.  It is accordingly  agreed that the parties hereto shall be
entitled to an injunction or injunctions  to prevent  breaches of this Agreement
and to enforce  specifically the terms and provisions hereof in any court of the
United  States or any state having  jurisdiction,  this being in addition to any
other remedy to which they are entitled at law or equity.

                  16. VALIDITY.  (a) The invalidity or  unenforceability  of any
provision of this Agreement shall not affect the validity or  enforceability  of
the other  provisions  of this  Agreement,  which shall remain in full force and
effect.

                  (b) In the event any court or other competent  authority holds
any provisions of this Agreement to be null, void or unenforceable,  the parties
hereto shall  negotiate in good faith the execution and delivery of an amendment
to this Agreement in order, as nearly as possible, to effectuate,  to the extent
permitted  by law,  the  intent  of the  parties  hereto  with  respect  to such
provision and the economic effects thereof.

                  (c)  Subject to Section 5, if for any reason any such court or
regulatory agency determines that OPTION HOLDER is not permitted to acquire,  or
OPTION  GRANTOR is not permitted to  repurchase  pursuant to Section 8, the full
number of shares of OPTION GRANTOR Common Stock provided in Section 1 hereof (as
the same may be  adjusted),  it is the express  intention  of OPTION  GRANTOR to
allow OPTION HOLDER to acquire or to require OPTION  GRANTOR to repurchase  such
lesser  number  of  shares  as may  be  permissible  without  any  amendment  or
modification hereof.

                  (d)  Each  party  agrees  that,  should  any  court  or  other
competent  authority  hold any provision of this  Agreement or part hereof to be
null, void or unenforceable,  or order any party to take any action inconsistent
herewith,  or not take any action required herein,  the other party shall not be
entitled  to specific  performance  of such  provision  or part hereof or to any
other remedy,  including but not limited to money damages,  for breach hereof or
of any other  provision  of this  Agreement or part hereof as the result of such
holding or order.

                                     - 16 -

<PAGE>

                  17. NOTICES.  All notices and other  communications  hereunder
shall be in writing and shall be deemed given if (a)  delivered  personally,  or
(b) if sent by overnight courier service (receipt confirmed in writing),  or (c)
if delivered by facsimile  transmission  (with receipt  confirmed),  or (d) five
days  after  being  mailed by  registered  or  certified  mail  (return  receipt
requested)  to the parties in each case to the  following  addresses (or at such
other address for a party as shall be specified by like notice):

                  A.       If to OPTION HOLDER, to:

                           WPL Holdings, Inc.
                           222 West Washington Avenue
                           Madison, Wisconsin  53703

                           Attention:  Erroll B. Davis, Jr.
                           Fax:  (608) 252-5059

                           with a copy to:

                           Foley & Lardner
                           777 East Wisconsin Avenue
                           Milwaukee, Wisconsin  53202-5367

                           Attention:  Benjamin F. Garmer, III, Esq.
                           Fax:  (414) 297-4900

                  B.       If to OPTION GRANTOR, to:

                           Interstate Power Company
                           1000 Main Street
                           Dubuque, Iowa  52004-0789

                           Attention:     Wayne H. Stoppelmoor
                                          Chairman
                           Fax:  (319) 557-2202

                           with a copy to:

                           Milbank, Tweed, Hadley & McCloy
                           1 Chase Manhattan Plaza
                           New York, New York  10005-1413

                           Attention:  John T. O'Connor, Esq.
                           Fax:  (212) 530-5219

                  18.  GOVERNING  LAW. This  Agreement  shall be governed by and
construed in  accordance  with the laws of the State of Delaware  applicable  to
agreements  made and to be  performed  entirely  within  such State and  without
regard to its choice of law

                                     - 17 -

<PAGE>

principles  or to any  requirement  as to  jurisdiction  or  service  of process
contained in Section 2708 of Title 6 of the Delaware Code.

                  19. INTERPRETATION.

                  (a) When  reference  is made in this  Agreement  to  Articles,
Sections or Exhibits, such reference shall be to an Article,  Section or Exhibit
of this Agreement, as the case may be, unless otherwise indicated.

                  (b) The  table of  contents  and  headings  contained  in this
Agreement are for reference purposes and shall not affect in any way the meaning
or interpretation of the Agreement.

                  (c) Whenever the words  "include,"  "includes," or "including"
are used in this  Agreement,  they shall be deemed to be  followed  by the words
"without limitation."

                  (d)  Whenever  "or"  is used in this  Agreement  it  shall  be
construed in the nonexclusive sense.

                  20.  COUNTERPARTS;  EFFECT.  This Agreement may be executed in
one or more counterparts,  each of which shall be deemed to be an original,  but
all of which shall constitute one and the same agreement.

                  21. AMENDMENTS;  WAIVER.  This Agreement may be amended by the
parties  hereto and the terms and  conditions  hereof  may be waived  only by an
instrument in writing signed on behalf of each of the parties hereto, or, in the
case of a waiver,  by an  instrument  signed  on  behalf  of the  party  waiving
compliance.

                  22. EXTENSION OF TIME PERIODS.  The time periods for exercises
of certain  rights under  Sections 2, 7 and 8 shall be extended (but in no event
by more than six months):

                  (a) to the extent necessary to obtain all regulatory approvals
for the exercise of such rights, and for the expiration of all statutory waiting
periods; and

                  (b) to the  extent  necessary  to avoid  any  liability  under
Section 16(b) of the Exchange Act by reason of such exercise.



                      THIS SPACE INTENTIONALLY LEFT BLANK





                                     - 18 -

<PAGE>

                  IN WITNESS  WHEREOF,  the  parties  hereto  have  caused  this
Agreement to be executed by their respective duly authorized  officers as of the
date first above written.

                                         INTERSTATE POWER COMPANY


                                         By:/s/ WAYNE H. STOPPELMOOR
                                            ------------------------
                                            Name:   Wayne H. Stoppelmoor
                                            Title:  President, Chief Executive
                                                     Officer and Chairman of 
                                                     the Board


                                         WPL HOLDINGS, INC.


                                         By:/s/ ERROLL B. DAVIS, JR.
                                            ------------------------
                                            Name:   Erroll B. Davis, Jr.
                                            Title:  President and Chief
                                                     Executive Officer



                                     - 19 -

<PAGE>

                                                                       EXHIBIT F


                   OPTION GRANTOR/OPTION HOLDER STOCK OPTION
                         AND TRIGGER PAYMENT AGREEMENT


                  This STOCK  OPTION  AGREEMENT,  dated as of November  10, 1995
(the "Agreement") by and among Interstate Power Company, a corporation organized
under the laws of the State of Delaware  ("OPTION GRANTOR" or the "Company") and
IES Industries Inc., a corporation organized under the laws of the State of Iowa
("OPTION HOLDER").

                          W I T N E S S E T H   T H A T:

                  WHEREAS,  concurrently with the execution and delivery of this
Agreement,  OPTION  GRANTOR,  OPTION HOLDER,  WPL Holdings,  Inc., a corporation
organized under the laws of the State of Wisconsin ("WPL"), and AMW Acquisition,
Inc., a wholly-owned  subsidiary of WPL organized under the laws of the State of
Delaware ("AMW"), are entering into an Agreement and Plan of Merger, dated as of
November 10, 1995, (the "Merger  Agreement"),  which provides,  inter alia, upon
the terms and subject to the conditions thereof, for the merger of OPTION HOLDER
with and into WPL in  accordance  with the laws of the States of  Wisconsin  and
Iowa (the "IES  Merger"),  and the merger of AMW with and into OPTION GRANTOR in
accordance with the laws of the State of Delaware (the "Interstate  Merger,  and
together with the IES Merger, the "Merger");

                  WHEREAS,  in  connection  with  the  execution  of the  Merger
Agreement, OPTION GRANTOR, OPTION HOLDER and WPL are entering into certain stock
option  agreements dated as of the date hereof,  of which this Agreement is one,
whereby the parties  hereto  grant each other an option with  respect to certain
shares of each other's  common stock on the terms and subject to the  conditions
set forth therein (the "Stock Option Agreements"); and

                  WHEREAS,  as a condition  to OPTION  HOLDER's  willingness  to
enter into the Merger Agreement, OPTION HOLDER has requested that OPTION GRANTOR
agree,  and OPTION  GRANTOR has so agreed,  to grant to OPTION  HOLDER an option
with respect to certain shares of OPTION  GRANTOR's  common stock,  on the terms
and subject to the conditions set forth herein;

                  NOW,  THEREFORE,  to induce  OPTION  HOLDER to enter  into the
Merger   Agreement  and  certain  of  the  Stock  Option   Agreements,   and  in
consideration  of the  representations,  warranties,  covenants  and  agreements
contained  herein, in the Merger Agreement and in the Stock Option Agreements to
which OPTION GRANTOR and OPTION

<PAGE>

HOLDER are parties,  the parties hereto,  intending to be legally bound,  hereby
agree as follows:

                  1. GRANT OF OPTION.

                  (a) Subject to the  receipt of all  regulatory  approvals  and
orders  required  by  OPTION  GRANTOR  as set  forth in  Section  6.4(c)  of the
Interstate  Disclosure  Schedule to the Merger Agreement and by OPTION HOLDER as
set  forth in  Section  5.4(c)  of the IES  Disclosure  Schedule  to the  Merger
Agreement, OPTION GRANTOR hereby grants OPTION HOLDER an irrevocable option (the
"OPTION  GRANTOR  Option") to  purchase up to that number of shares,  subject to
adjustment as provided in Section 12 (the "OPTION  GRANTOR  Shares"),  of common
stock,  par value $3.50 per share, of OPTION GRANTOR (the "OPTION GRANTOR Common
Stock") equal to a percentage  (the "Option  Shares  Percentage"),  which Option
Shares  Percentage is equal to the OPTION HOLDER's  Participation  Percentage as
defined below in subsection  (e), of 1,903,293  shares of OPTION  GRANTOR Common
Stock (being 19.9% of the number of shares of OPTION GRANTOR Common Stock issued
and outstanding as of November 10, 1995, the "Initial Number") in the manner set
forth  below,  at a price (the  "Exercise  Price") per OPTION  GRANTOR  Share of
$28.9375 (which is equal to the Fair Market Value (as defined below) of a OPTION
GRANTOR Share as of the date hereof).

                  (b) The Exercise  Price shall be payable,  at OPTION  HOLDER's
option, as follows:

                           (i)   in cash, or

                           (ii)  subject to the receipt of all  approvals of any
         Governmental  Authority  required  for OPTION  GRANTOR to acquire,  and
         OPTION HOLDER to issue,  the OPTION  HOLDER  Shares (as defined  below)
         from OPTION HOLDER,  in shares of common stock, no par value, of OPTION
         HOLDER ("OPTION HOLDER Shares"),

in either case in accordance with Section 4 hereof.

                  (c)  Notwithstanding  the  foregoing,  in no event  shall  the
number  of  OPTION  GRANTOR  Shares  for  which  the  OPTION  GRANTOR  Option is
exercisable  exceed the product of the Option Shares  Percentage and the Initial
Number, subject to adjustment as provided in Section 12.

                  (d) As used herein, the "Fair Market Value" of any share shall
be the average of the daily  closing  sales price for such share on the New York
Stock  Exchange (the "NYSE") during the ten NYSE trading days prior to the fifth
NYSE trading day preceding the date such Fair Market Value is to be determined.

                  (e) For  purposes of this  Agreement  the term  "Participation
Percentage"  shall have the same meaning as in Section  10.3(f)(i) of the Merger
Agreement,  except that the numerator and denominator  shall be calculated based
on the number of shares of WPL

                                     - 2 -

<PAGE>

Common  Stock which would be issuable  (or, in the case of WPL,  retained by its
shareholders) on a fully diluted basis had the Effective Time occurred as of the
date on which the  Exercise  Notice is delivered  under  Section 2 hereof or the
date on which demand for the Trigger  Payment (as defined herein) is given under
Section 5 hereof,  as the case may be. Other  capitalized  terms used herein but
not defined herein shall have the meanings set forth in the Merger Agreement.

                  2. EXERCISE OF OPTION.

                  (a) The  OPTION  GRANTOR  Option  may be  exercised  by OPTION
HOLDER,  in whole or in part,  at any time or from time to time after the Merger
Agreement becomes  terminable by OPTION HOLDER under  circumstances  which could
entitle OPTION HOLDER to a termination  fee under Section  10.3(a) of the Merger
Agreement  (provided that the events specified in Section  10.3(a)(ii)(A) of the
Merger  Agreement shall have occurred,  although the events specified in Section
10.3(a)(ii)(B) thereof need not have occurred), or Section 10.3(b) of the Merger
Agreement  (regardless of whether the Merger Agreement is actually terminated or
whether  there occurs a closing of any Business  Combination  involving a Target
Party or a closing by which a Target Party becomes a Subsidiary), any such event
by which the Merger  Agreement  becomes so  terminable  by OPTION  HOLDER  being
referred to herein as a "Trigger Event").

                  (b) (i) OPTION GRANTOR shall notify OPTION HOLDER  promptly in
         writing of the  occurrence of any Trigger  Event,  it being  understood
         that the  giving  of such  notice  by  OPTION  GRANTOR  shall  not be a
         condition to the right of OPTION HOLDER to exercise the OPTION  GRANTOR
         Option.

                           (ii) In the event  OPTION  HOLDER  wishes to exercise
         the  OPTION  GRANTOR  Option,  OPTION  HOLDER  shall  deliver to OPTION
         GRANTOR  written  notice (an "Exercise  Notice")  specifying  the total
         number of OPTION GRANTOR Shares it wishes to purchase.

                           (iii)  Upon the  giving  by  OPTION  HOLDER to OPTION
         GRANTOR  of the  Exercise  Notice  and  the  tender  of the  applicable
         aggregate Exercise Price, OPTION HOLDER, to the extent permitted by law
         and OPTION GRANTOR's  organizational  documents,  and provided that the
         conditions to OPTION  GRANTOR's  obligation to issue the OPTION GRANTOR
         Shares  to OPTION  HOLDER  hereunder  set forth in  Section 3 have been
         satisfied or waived,  shall be deemed to be the holder of record of the
         OPTION GRANTOR Shares issuable upon such exercise, notwithstanding that
         the stock transfer books of OPTION GRANTOR shall then be closed or that
         certificates  representing such OPTION GRANTOR Shares shall not then be
         actually delivered to OPTION HOLDER.

                           (iv) Each  closing  of a purchase  of OPTION  GRANTOR
         Shares (a "Closing")  shall occur at a place,  on a date, and at a time
         designated  by OPTION HOLDER in an Exercise  Notice  delivered at least
         two business days prior to the date of the Closing.

                                     - 3 -

<PAGE>

                  (c)  The  OPTION  GRANTOR  Option  shall  terminate  upon  the
earliest to occur of:

                           (i)  the Effective Time of the Merger;

                           (ii) the termination of the Merger Agreement pursuant
         to Section  10.1  thereof,  other than under  circumstances  which also
         constitute a Trigger Event under this Agreement;

                           (iii)  180  days  following  any  termination  of the
         Merger  Agreement upon or during the continuance of a Trigger Event (or
         if, at the expiration of such 180 day period, the OPTION GRANTOR Option
         cannot  be  exercised  by reason of any  applicable  judgment,  decree,
         order,  law or regulation,  ten business days after such  impediment to
         exercise  shall have been  removed or shall have  become  final and not
         subject to appeal,  but in no event under this clause  (iii) later than
         May 10, 1998); and

                           (iv) payment by OPTION GRANTOR of the Trigger Payment
         set forth in Section 5 of this Agreement to OPTION HOLDER.

                  (d) Notwithstanding  the foregoing,  the OPTION GRANTOR Option
may not be  exercised if (i) OPTION  HOLDER is in material  breach of any of its
representations or warranties,  or in material breach of any of its covenants or
agreements,  contained in this Agreement or in the Merger  Agreement,  or (ii) a
Trigger  Payment has been paid pursuant to Section 5 of this Agreement or demand
therefor has been made and not withdrawn.

                  3. CONDITIONS TO CLOSING.  The obligation of OPTION GRANTOR to
issue the OPTION  GRANTOR  Shares to OPTION  HOLDER  hereunder is subject to the
conditions that

                  (a) all waiting periods,  if any, under the HSR Act applicable
to the issuance and  acquisition of the OPTION GRANTOR  Shares  hereunder  shall
have expired or have been terminated;

                  (b) the OPTION  GRANTOR  Shares,  and any OPTION HOLDER Shares
which are issued in payment of the Exercise Price,  shall have been approved for
listing on the NYSE subject only to official notice of issuance;

                  (c) all consents,  approvals,  orders or authorizations of, or
registrations,  declarations  or  filings  with,  any  federal,  state  or local
administrative   agency  or  commission  or  other   federal,   state  or  local
Governmental  Authority,  if any,  required in  connection  with the issuance by
OPTION GRANTOR and the acquisition by OPTION HOLDER of the OPTION GRANTOR Shares
hereunder shall have been obtained or made, including,  without limitation,  the
approval  of the SEC  under  Sections  9 and 10 of the  Public  Utility  Holding
Company  Act of 1935,  as amended  (the "1935  Act"),  the  approval of the Iowa
Utilities  Board,  the Public  Service  Commission of Minnesota and the Illinois
Commerce  Commission  of the  issuance  of the OPTION  GRANTOR  Shares by OPTION
GRANTOR and, if

                                     - 4 -

<PAGE>

applicable,  the acquisition of OPTION GRANTOR Shares by OPTION HOLDER,  and the
approval of the Iowa  Utilities  Board of the  acquisition of the OPTION GRANTOR
Shares by OPTION HOLDER and, if applicable, the acquisition by OPTION GRANTOR of
the OPTION HOLDER Shares constituting the Exercise Price hereunder; and

                  (d) no preliminary  or permanent  injunction or other order by
any court of competent  jurisdiction  prohibiting or otherwise  restraining such
issuance shall be in effect.

The condition set forth in paragraph (b) above may be waived by OPTION  GRANTOR,
in the case of OPTION HOLDER Shares, and by OPTION HOLDER, in the case of OPTION
GRANTOR Shares, in the sole discretion of the waiving party.

                  4. CLOSING. At any Closing,

                  (a)  OPTION  GRANTOR  shall  deliver  to OPTION  HOLDER or its
designee a single  certificate  in definitive  form  representing  the number of
OPTION GRANTOR Shares  designated by OPTION HOLDER in its Exercise Notice,  such
certificate to be registered in the name of OPTION HOLDER and to bear the legend
set forth in Section 13; and

                  (b)  OPTION  HOLDER  shall  deliver  to  OPTION   GRANTOR  the
aggregate  price for the OPTION GRANTOR Shares so designated and being purchased
by

                           (i) wire transfer of immediately  available  funds or
         certified check or bank check, or

                           (ii) subject to the  condition  in Section  1(b)(ii),
         delivery of a certificate or  certificates  representing  the number of
         OPTION  HOLDER  Shares being issued by OPTION  HOLDER in  consideration
         thereof, determined in accordance with Section 4(c).

                  (c) In the event  that  OPTION  HOLDER  issues  OPTION  HOLDER
Shares to OPTION GRANTOR in  consideration  of OPTION GRANTOR Shares pursuant to
Section  4(b)(ii),  the number of OPTION  HOLDER Shares to be so issued shall be
equal to the quotient obtained by dividing:

                           (i) the  product of (x) the number of OPTION  GRANTOR
         Shares  with  respect  to which  the  OPTION  GRANTOR  Option  is being
         exercised and (y) the Exercise Price, by

                           (ii)  the Fair  Market  Value  of the  OPTION  HOLDER
         Shares  as of the date  immediately  preceding  the  date the  Exercise
         Notice is delivered to OPTION GRANTOR.

                  (d) OPTION  GRANTOR  shall pay all  expenses,  and any and all
Federal,  state  and  local  taxes  and other  charges  that may be  payable  in
connection with the preparation,  issue and delivery of stock certificates under
this Section 4.

                                     - 5 -

<PAGE>

                  5.  TRIGGER PAYMENT.

                  (a)  Trigger  Payment.  Subject to the  provisions  of Section
10.3(e) of the Merger Agreement,  if a Trigger Event shall have occurred and any
regulatory approval or order required for the issuance by OPTION GRANTOR, or the
acquisition by OPTION HOLDER, of the OPTION GRANTOR Option pursuant to Section 1
hereof  shall not have been  obtained,  OPTION  HOLDER  shall  have the right to
receive,  and OPTION GRANTOR shall pay to OPTION HOLDER, an amount (the "Trigger
Payment") equal to the product of

                           (i) the maximum  number of OPTION GRANTOR Shares that
         would have been subject to purchase by OPTION  HOLDER upon  exercise of
         the OPTION  GRANTOR  Option  pursuant to Sections 1 and 2 hereof if all
         such regulatory approvals or orders had been obtained, and

                           (ii)  the  difference  between  (A) the  Market/Offer
         Price (as defined herein), determined as of the date on which notice of
         demand for the Trigger  Payment is given by OPTION HOLDER,  and (B) the
         Exercise Price (but only if such Market/Offer Price is higher than such
         Exercise Price).

Demand for the Trigger  Payment shall be given by notice in accordance  with the
provisions  of Section 17 hereof.  The Trigger  Payment  shall be paid to OPTION
HOLDER by OPTION  GRANTOR  on the  Payment  Date (as  defined  herein),  by wire
transfer  of  immediately  available  funds to an  account to be  designated  in
writing by OPTION  HOLDER not less than two  business  days  before the  Payment
Date.

                  (b) Payment  Date.  For purposes of this  Section 5,  "Payment
Date" means the date on which termination fees are required to be paid by OPTION
GRANTOR to OPTION HOLDER under Sections 10.3(a) or 10.3(b),  as the case may be,
of the Merger  Agreement  as a result of the  occurrence  of the  Trigger  Event
referred to in subsection (a) of this Section 5.

                  (c)  Certain   Conditions.   OPTION   GRANTOR  shall  have  no
obligation to pay the Trigger  Payment if OPTION HOLDER is in material breach of
any of its  representations  or warranties,  or in material breach of any of its
covenants or agreements, contained in this Agreement or in the Merger Agreement.

                  6.  REPRESENTATIONS  AND WARRANTIES OF OPTION GRANTOR.  OPTION
GRANTOR represents and warrants to OPTION HOLDER that

                  (a)  Except as set forth in Section  6.4(a) of the  Interstate
Disclosure  Schedule to the Merger  Agreement,  OPTION GRANTOR has the corporate
power  and  authority  to  enter  into  this  Agreement  and to  carry  out  its
obligations  hereunder,  subject  in the case of the  repurchase  of the  OPTION
GRANTOR Shares  pursuant to Section 8(a) to applicable law and the provisions of
OPTION  GRANTOR's  Articles of  Incorporation,  as amended (the "OPTION  GRANTOR
Articles");

                                     - 6 -

<PAGE>

                  (b) this  Agreement  has been duly and  validly  executed  and
delivered by OPTION GRANTOR, and, assuming the due authorization,  execution and
delivery  hereof by OPTION  HOLDER and the  receipt of all  required  regulatory
approvals,  constitutes  a valid  and  binding  obligation  of  OPTION  GRANTOR,
enforceable  against OPTION GRANTOR in accordance with its terms,  except as may
be limited by applicable bankruptcy, insolvency, reorganization or other similar
laws affecting the enforcement of creditors' rights  generally,  and except that
the availability of equitable remedies,  including specific performance,  may be
subject to the discretion of any court before which any proceeding  therefor may
be brought;

                  (c) OPTION GRANTOR has taken all necessary corporate action to
authorize  and reserve for issuance and to permit it to issue,  upon exercise of
the OPTION  GRANTOR  Option,  and at all times from the date hereof  through the
expiration of the OPTION GRANTOR  Option will have reserved,  the Initial Number
of authorized and unissued OPTION GRANTOR  Shares,  such amount being subject to
adjustment  as  provided in Section 12, all of which,  upon their  issuance  and
delivery  in  accordance  with  the  terms  of  this  Agreement,  will  be  duly
authorized, validly issued, fully paid and nonassessable;

                  (d) upon  delivery  of the  OPTION  GRANTOR  Shares  to OPTION
HOLDER  upon the  exercise  of the OPTION  GRANTOR  Option,  OPTION  HOLDER will
acquire the OPTION GRANTOR Shares free and clear of all claims,  liens, charges,
encumbrances and security interests of any nature whatsoever;

                  (e) except as  described in Section  6.4(b) of the  Interstate
Disclosure Schedule to the Merger Agreement,  the execution and delivery of this
Agreement by OPTION GRANTOR does not, and, subject to compliance with applicable
law and the OPTION GRANTOR Articles with respect to the repurchase of the OPTION
GRANTOR Shares  pursuant to Section 8(a), the  consummation by OPTION GRANTOR of
the transactions contemplated hereby will not, violate, conflict with, or result
in a breach of any provision of, or constitute a default (with or without notice
or a lapse  of time,  or both)  under,  or  result  in the  termination  of,  or
accelerate  the  performance  required by, or result in a right of  termination,
cancellation,  or  acceleration  of any  obligation  or the  loss of a  material
benefit under,  or the creation of a lien,  pledge,  security  interest or other
encumbrance  on  assets  (any  such  conflict,   violation,  default,  right  of
termination,  cancellation,   acceleration,  loss  or  creation,  hereinafter  a
"Violation") of OPTION GRANTOR or any of its Subsidiaries, pursuant to

                           (i) any provision of the OPTION  GRANTOR  Articles or
         the Bylaws of OPTION GRANTOR,

                           (ii) any  provisions  of any material  loan or credit
         agreement,  note,  mortgage,  indenture,  lease,  benefit plan or other
         agreement,  obligation,  instrument,  permit, concession,  franchise or
         license  (any of the  foregoing  in  effect  on the date  hereof  being
         referred  to  as a  "Material  Contract")  of  OPTION  GRANTOR  or  its
         subsidiaries or to which any of them is a party, or

                           (iii) any  judgment,  order,  decree,  statute,  law,
         ordinance,  rule or  regulation  applicable  to OPTION  GRANTOR  or its
         properties or assets,

                                     - 7 -

<PAGE>

which Violation, in the case of each clauses (ii) and (iii), could reasonably be
expected to have an OPTION  GRANTOR  Material  Adverse  Effect  (except  that no
representation  or  warranty is given  concerning  any  Violation  of a Material
Contract with respect to the  repurchase of OPTION  GRANTOR  Shares  pursuant to
Section 8(a));

                  (f) except as  described in Section  6.4(c) of the  Interstate
Disclosure  Schedule  to the  Merger  Agreement  or  Section 1 or 3 hereof,  the
execution  and delivery of this  Agreement  by OPTION  GRANTOR does not, and the
performance of this  Agreement by OPTION GRANTOR will not,  require any consent,
approval,  authorization  or permit  of,  filing  with or  notification  to, any
Governmental Authority;

                  (g) none of OPTION  GRANTOR,  any of its  affiliates or anyone
acting on its or their  behalf,  has  issued,  sold or offered  any  security of
OPTION GRANTOR to any person under  circumstances  that would cause the issuance
and sale of OPTION GRANTOR Shares,  as  contemplated  by this  Agreement,  to be
subject to the  registration  requirements of the Securities Act as in effect on
the date hereof,  and,  assuming the  representations  and  warranties of OPTION
HOLDER  contained in Section 7(g) are true and correct,  the issuance,  sale and
delivery  of the  OPTION  GRANTOR  Shares  hereunder  would be  exempt  from the
registration and prospectus  delivery  requirements of the Securities Act, as in
effect on the date hereof (and OPTION  GRANTOR  shall not take any action  which
would cause the issuance,  sale, and delivery of OPTION GRANTOR Shares hereunder
not to be exempt from such requirements); and

                  (h)  any  OPTION  HOLDER  Shares  acquired  pursuant  to  this
Agreement  will be acquired for OPTION  GRANTOR's  own account,  for  investment
purposes  only,  and will not be acquired by OPTION  GRANTOR  with a view to the
public  distribution  thereof in  violation of any  applicable  provision of the
Securities Act.

                  7.  REPRESENTATIONS  AND WARRANTIES OF OPTION  HOLDER.  OPTION
HOLDER represents and warrants to OPTION GRANTOR that

                  (a)  Except  as set  forth  in  Schedule  5.4(a)  of  the  IES
Disclosure  Schedule to the Merger  Agreement,  OPTION  HOLDER has the corporate
power  and  authority  to  enter  into  this  Agreement  and to  carry  out  its
obligations hereunder;

                  (b) this  Agreement  has been duly and  validly  executed  and
delivered by OPTION HOLDER and,  assuming the due  authorization,  execution and
delivery  hereof by OPTION  GRANTOR and the receipt of all  required  regulatory
approvals,  constitutes  a  valid  and  binding  obligation  of  OPTION  HOLDER,
enforceable  against  OPTION HOLDER in  accordance  with its  respective  terms,
except as may be limited by applicable bankruptcy,  insolvency,  reorganization,
or other similar laws affecting the enforcement of creditors'  rights generally,
and except that the  availability  of  equitable  remedies,  including  specific
performance,  may be subject to the  discretion  of any court  before  which any
proceeding may be brought;

                  (c)  prior  to  any  delivery  of  OPTION   HOLDER  Shares  in
consideration of the purchase of OPTION GRANTOR Shares pursuant  hereto,  OPTION
HOLDER will have

                                     - 8 -

<PAGE>

taken all necessary  corporate action to authorize for issuance and to permit it
to issue such  OPTION  HOLDER  Shares,  all of which,  upon their  issuance  and
delivery  in  accordance  with  the  terms  of  this  Agreement,  will  be  duly
authorized, validly issued, fully paid and nonassessable;

                  (d) upon any delivery of such OPTION  HOLDER  Shares to OPTION
GRANTOR in  consideration  of the  purchase of OPTION  GRANTOR  Shares  pursuant
hereto,  OPTION  GRANTOR will acquire the OPTION HOLDER Shares free and clear of
all claims,  liens,  charges,  encumbrances and security interests of any nature
whatsoever;

                  (e)  except  as  described  in  Section   5.4(b)  of  the  IES
Disclosure Schedule to the Merger Agreement,  the execution and delivery of this
Agreement by OPTION  HOLDER does not, and the  consummation  by OPTION HOLDER of
the transactions contemplated hereby will not, violate, conflict with, or result
in the breach of any  provision  of, or  constitute  a default  (with or without
notice or a lapse of time, or both) under,  or result in any Violation by OPTION
HOLDER or any of its Subsidiaries, pursuant to

                           (i) any provision of the Articles of Incorporation or
         Bylaws of OPTION HOLDER,

                           (ii) any Material Contract of OPTION HOLDER or any of
         its subsidiaries or to which any of them is a party, or

                           (iii) any  judgment,  order,  decree,  statute,  law,
         ordinance,  rule or  regulation  applicable  to  OPTION  HOLDER  or its
         properties or assets,

which  Violation,  in the case of each of clauses  (ii) or (iii),  would have an
OPTION HOLDER Material Adverse Effect;

                  (f)  except  as  described  in  Section   5.4(c)  of  the  IES
Disclosure  Schedule  to the  Merger  Agreement  or  Section 1 or 3 hereof,  the
execution  and  delivery of this  Agreement  by OPTION  HOLDER does not, and the
consummation by OPTION HOLDER of the transactions  contemplated hereby will not,
require  any  consent,  approval,  authorization  or permit of,  filing  with or
notification to, any Governmental Authority; and

                  (g) any OPTION  GRANTOR  Shares  acquired upon exercise of the
OPTION  GRANTOR  Option will be acquired for OPTION  HOLDER's  own account,  for
investment  purposes only and will not be, and the OPTION  GRANTOR Option is not
being, acquired by OPTION HOLDER with a view to the public distribution thereof,
in violation of any applicable provision of the Securities Act.

                  8.   CERTAIN REPURCHASES.

                  (a) OPTION  HOLDER  "PUT".  At the request of OPTION HOLDER by
written  notice  (x) at any time  during  which  the  OPTION  GRANTOR  Option is
exercisable pursuant to Section 2 (the "Repurchase Period"),  OPTION GRANTOR (or
any successor  entity thereof) shall, if permitted by applicable law, the OPTION
GRANTOR Articles and

                                     - 9 -

<PAGE>

Bylaws and OPTION GRANTOR's  Material  Contracts,  repurchase from OPTION HOLDER
all or any  portion  of the  OPTION  GRANTOR  Option,  at the price set forth in
subparagraph (i) below, or, (y) at any time prior to May 10, 1997 (provided that
such date shall be extended to May 10,  1998 under the  circumstances  where the
date after which either party may  terminate  the Merger  Agreement  pursuant to
Section  10.1(b) of the Merger  Agreement  has been  extended to May 10,  1998),
OPTION  GRANTOR  (or any  successor  entity  thereof)  shall,  if  permitted  by
applicable  law, the OPTION  GRANTOR  Articles  and Bylaws and OPTION  GRANTOR's
Material  Contracts,  repurchase  from  OPTION  HOLDER all or any portion of the
OPTION GRANTOR Shares  purchased by OPTION HOLDER pursuant to the OPTION GRANTOR
Option, at the price set forth in subparagraph (ii) below:

                         (i) (A) The difference between the "Market/Offer Price"
         (as defined  below) for shares of OPTION GRANTOR Common Stock as of the
         date OPTION  HOLDER  gives  notice of its intent to exercise its rights
         under this Section 8 and the Exercise  Price,  multiplied by the number
         of OPTION  GRANTOR  Shares  purchasable  pursuant to the OPTION GRANTOR
         Option (or  portion  thereof  with  respect to which  OPTION  HOLDER is
         exercising   its  rights  under  this  Section  8),  but  only  if  the
         Market/Offer Price is greater than the Exercise Price.

                           (B) for  purposes  of this  Agreement,  "Market/Offer
         Price")  shall  mean,  as of any date,  the higher of (I) the price per
         share offered as of such date pursuant to any tender or exchange  offer
         or other offer with respect to a Business Combination  involving OPTION
         GRANTOR as the Target  Party  which was made prior to such date and not
         terminated  or withdrawn as of such date and (II) the Fair Market Value
         of OPTION GRANTOR Common Stock as of such date.

                        (ii) (A) the product of (I) the sum of (a) the  Exercise
         Price paid by OPTION HOLDER per OPTION GRANTOR Share acquired  pursuant
         to the OPTION GRANTOR Option, and (b) the difference between the "Offer
         Price" (as defined below) and the Exercise Price, but only if the offer
         Price is greater that the Exercise Price, and (II) the number of OPTION
         GRANTOR Shares so to be repurchased pursuant to this Section 8.

                           (B) For  purposes  of this  clause  (ii),  the "Offer
         Price"  shall be the  highest  price per share  offered  pursuant  to a
         tender or exchange offer or other Business  Combination offer involving
         OPTION GRANTOR as the Target Party during the  Repurchase  Period prior
         to the delivery by OPTION HOLDER of a notice of repurchase.

                  (b) REDELIVERY OF OPTION HOLDER SHARES. If OPTION HOLDER shall
have  previously  elected to  purchase  OPTION  GRANTOR  Shares  pursuant to the
exercise of the OPTION  GRANTOR  Option by the  issuance  and delivery of OPTION
HOLDER Shares,  then OPTION GRANTOR shall, if so requested by OPTION HOLDER,  in
fulfillment of its obligation pursuant to Section 8(a)(y) (that is, with respect
to the  Exercise  Price only and without  limitation  to its  obligation  to pay
additional consideration under clause (b) of Section 8(a)(ii)(A)(I)),  redeliver
the certificates for such OPTION HOLDER Shares to OPTION HOLDER,  free and clear
of all liens, claims, charges and encumbrances of any

                                     - 10 -

<PAGE>

kind or nature whatsoever;  provided, however, that if at any time less than all
of the OPTION  GRANTOR  Shares so  purchased  by OPTION  HOLDER  pursuant to the
OPTION  GRANTOR  Option are to be  repurchased  by OPTION  GRANTOR  pursuant  to
Section  8(a)(y),  then (i) OPTION  GRANTOR  shall be  obligated to redeliver to
OPTION HOLDER the same  proportion of such OPTION HOLDER Shares as the number of
OPTION GRANTOR Shares that OPTION GRANTOR is then obligated to repurchase  bears
to the number of OPTION GRANTOR  Shares  acquired by OPTION HOLDER upon exercise
of the  OPTION  GRANTOR  Option and (ii)  OPTION  HOLDER  shall  issue to OPTION
GRANTOR new certificates  representing  those OPTION HOLDER Shares which are not
due to be  redelivered  to OPTION  HOLDER  pursuant to this  Section 8(b) to the
extent  that  excess  OPTION  HOLDER  Shares are  included  in the  certificates
redelivered to OPTION HOLDER by OPTION GRANTOR.

                  (c)  PAYMENT  AND  REDELIVERY  OF OPTION  GRANTOR  OPTIONS  OR
SHARES.  In the event OPTION  HOLDER  exercises its rights under this Section 8,
OPTION  GRANTOR  shall,  within ten business days  thereafter,  pay the required
amount to OPTION HOLDER in immediately  available  funds and OPTION HOLDER shall
surrender to OPTION  GRANTOR the OPTION  GRANTOR  Option or the  certificate  or
certificates  evidencing the OPTION  GRANTOR  Shares  purchased by OPTION HOLDER
pursuant hereto, and OPTION HOLDER shall warrant that it owns the OPTION GRANTOR
Option or such shares and that the OPTION GRANTOR Option or such shares are then
free and clear of all liens,  claims,  damages,  charges and encumbrances of any
kind or nature whatsoever.

                  (d) OPTION  HOLDER  "CALL".  If OPTION  HOLDER has  elected to
purchase  OPTION GRANTOR  Shares  pursuant to the exercise of the OPTION GRANTOR
Option by the  issuance and delivery of OPTION  HOLDER  Shares,  notwithstanding
that OPTION  HOLDER may no longer hold any such  OPTION  GRANTOR  Shares or that
OPTION  HOLDER  elects not to exercise  its other  rights  under this Section 8,
OPTION  HOLDER  may  require,  at any time or from time to time prior to May 10,
1997  (provided  that such date  shall be  extended  to May 10,  1998  under the
circumstances  where the date after which either party may  terminate the Merger
Agreement  pursuant to Section 10.1(b) of the Merger Agreement has been extended
to May 10, 1998), OPTION GRANTOR to sell to OPTION HOLDER any such OPTION HOLDER
Shares at the price  attributed to such OPTION HOLDER Shares pursuant to Section
4 plus  interest  at the rate of 8.75% per annum on such amount from the Closing
Date relating to the exchange of such OPTION HOLDER Shares pursuant to Section 4
to the Closing Date under this  Section  8(d) less any  dividends on such OPTION
HOLDER Shares paid during such period or declared and payable to stockholders of
record on a date during such period.

                  (e) REPURCHASE PRICE REDUCED AT OPTION HOLDER'S OPTION. In the
event the repurchase  price specified in Section 8(a) would subject the purchase
of the OPTION GRANTOR  Option or the OPTION  GRANTOR Shares  purchased by OPTION
HOLDER  pursuant to the OPTION GRANTOR Option to a vote of the  shareholders  of
OPTION GRANTOR pursuant to applicable law or the OPTION GRANTOR  Articles,  then
OPTION HOLDER may, at its  election,  reduce the  repurchase  price to an amount
which would permit such repurchase  without the necessity for such a shareholder
vote.

                                     - 11 -

<PAGE>

                  9.  VOTING OF SHARES.  Following  the date hereof and prior to
the fifth  anniversary of the date hereof (the  "Expiration  Date"),  each party
shall vote any shares of capital stock of the other party acquired by such party
pursuant to this Agreement  ("Restricted  Shares"),  including any OPTION HOLDER
Shares issued pursuant to Section 1(b), or otherwise  beneficially owned (within
the meaning of Rule 13d-3 promulgated under the Securities Exchange Act of 1934,
as amended (the "Exchange  Act")),  by such party on each matter  submitted to a
vote of shareholders of such other party for and against such matter in the same
proportion as the vote of all other  shareholders  of such other party are voted
(whether by proxy or otherwise) for and against such matter.

                  10.  RESTRICTIONS ON TRANSFER.

                  (a)  RESTRICTIONS ON TRANSFER.  Prior to the Expiration  Date,
neither party shall,  directly or indirectly,  by operation of law or otherwise,
sell, assign,  pledge, or otherwise dispose of or transfer any Restricted Shares
beneficially  owned by such party, other than (i) pursuant to Section 8, or (ii)
in accordance with Section 10(b) or Section 11.

                  (b) PERMITTED  SALES.  Following the termination of the Merger
Agreement, a party shall be permitted to sell any Restricted Shares beneficially
owned by it if such sale is made pursuant to a tender or exchange offer that has
been approved or recommended,  or otherwise  determined to be fair to and in the
best  interests of the  shareholders  of the other  party,  by a majority of the
members of the Board of  Directors  of such other party,  which  majority  shall
include a majority of directors who were directors prior to the  announcement of
such tender or exchange offer.

                  11.  REGISTRATION RIGHTS.

                  (a) Following the termination of the Merger Agreement,  either
party hereto that owns Restricted Shares (a "Designated  Holder") may by written
notice (the "Registration Notice") to the other party (the "Registrant") request
the  Registrant  to  register  under the  Securities  Act all or any part of the
Restricted Shares beneficially owned by such Designated Holder (the "Registrable
Securities")  pursuant  to a  bona  fide  firm  commitment  underwritten  public
offering,  in which the Designated  Holder and the underwriters  shall effect as
wide a distribution of such Registrable  Securities as is reasonably practicable
and shall use their best efforts to prevent any person  (including any Group (as
used in Rule 13d-5 under the Exchange Act)) and its affiliates  from  purchasing
through  such  offering  Restricted  Shares  representing  more  than  1% of the
outstanding shares of common stock of the Registrant on a fully diluted basis (a
"Permitted Offering").

                  (b)  The  Registration  Notice  shall  include  a  certificate
executed by the Designated Holder and its proposed managing  underwriter,  which
underwriter  shall  be an  investment  banking  firm  of  nationally  recognized
standing (the "Manager"), stating that

                           (i) they  have a good  faith  intention  to  commence
         promptly a Permitted Offering, and

                                     - 12 -

<PAGE>

                           (ii) the manager in good faith believes  that,  based
         on the then-prevailing  market conditions,  it will be able to sell the
         Registrable  Securities  at a per share  price equal to at least 80% of
         the then Fair Market Value of such shares.

                  (c)  The  Registrant  (and/or  any  person  designated  by the
Registrant)  shall  thereupon  have the option  exercisable  by  written  notice
delivered to the Designated Holder within ten business days after the receipt of
the Registration Notice, irrevocably to agree to purchase all or any part of the
Registrable  Securities  proposed to be so sold for cash at a price (the "Option
Price") equal to the product of (i) the number of  Registrable  Securities to be
so  purchased  by the  Registrant  and (ii) the then Fair  Market  Value of such
shares.

                  (d) Any purchase of  Registrable  Securities by the Registrant
(or its  designee)  under Section 11(c) shall take place at a closing to be held
at the principal  executive  offices of the  Registrant or at the offices of its
counsel at any reasonable date and time designated by the Registrant and/or such
designee in such  notice  within  twenty  business  days after  delivery of such
notice,  and any  payment  for the  shares to be so  purchased  shall be made by
delivery at the time of such closing in immediately available funds.

                  (e) If the  Registrant  does not elect to exercise  its option
pursuant to this Section 11 with respect to all Registrable Securities, it shall
use its best efforts to effect,  as promptly as  practicable,  the  registration
under the Securities Act of the unpurchased  Registrable  Securities proposed to
be so sold; provided, however, that

                           (i)  neither  party  shall be entitled to demand more
         than an aggregate of two effective  registration  statements hereunder,
         and

                           (ii) the Registrant  will not be required to file any
         such registration statement during any period of time (not to exceed 40
         days after  such  request in the case of clause (A) below or 90 days in
         the case of clauses (B) and (C) below) when

                                (A) the  Registrant is in possession of material
                  non-public  information which it reasonably  believes would be
                  detrimental  to be  disclosed at such time and, in the opinion
                  of  counsel  to the  Registrant,  such  information  would  be
                  required to be  disclosed  if a  registration  statement  were
                  filed at that time;

                                (B)  the   Registrant  is  required   under  the
                  Securities Act to include audited financial statements for any
                  period  in such  registration  statement  and  such  financial
                  statements  are  not  yet  available  for  inclusion  in  such
                  registration statement; or

                                (C) the Registrant determines, in its reasonable
                  judgment,  that such  registration  would  interfere  with any
                  financing, acquisition or other material transaction involving
                  the Registrant or any of its affiliates.

                  (f) The Registrant  shall use its  reasonable  best efforts to
cause any Registrable  Securities  registered  pursuant to this Section 11 to be
qualified for sale under the securities

                                     - 13 -

<PAGE>

or Blue Sky laws of such  jurisdictions as the Designated  Holder may reasonably
request and shall continue such  registration or qualification in effect in such
jurisdiction;  provided,  however,  that the Registrant shall not be required to
qualify to do  business  in, or consent  to general  service of process  in, any
jurisdiction by reason of this provision.

                  (g) The  registration  rights set forth in this Section 11 are
subject to the condition that the Designated Holder shall provide the Registrant
with such information with respect to such holder's Registrable Securities,  the
plans for the distribution  thereof,  and such other information with respect to
such holder as, in the  reasonable  judgment of counsel for the  Registrant,  is
necessary to enable the Registrant to include in such registration statement all
material  facts  required  to  be  disclosed  with  respect  to  a  registration
thereunder.

                  (h) A  registration  effected  under this  Section 11 shall be
effected at the  Registrant's  expense,  except for  underwriting  discounts and
commissions  and the fees and the expenses of counsel to the Designated  Holder,
and  the  Registrant  shall  provide  to  the  underwriters  such  documentation
(including  certificates,   opinions  of  counsel  and  "comfort"  letters  from
auditors) as is customary in connection with  underwritten  public  offerings as
such underwriters may reasonably require.

                  (i) In connection  with any  registration  effected under this
Section 11, the parties agree

                           (i) to indemnify each other and the  underwriters  in
         the customary manner,

                           (ii) to enter into an underwriting  agreement in form
         and substance  customary for transactions of such type with the Manager
         and the other underwriters participating in such offering, and

                          (iii)  to take  all  further  actions  which  shall be
         reasonably necessary to effect such registration and sale (including if
         the   Manager   deems  it   necessary,   participating   in   road-show
         presentations).

                  (j) The  Registrant  shall  be  entitled  to  include  (at its
expense)  additional  shares  of its  common  stock in a  registration  effected
pursuant  to this  Section 11 only if and to the extent the  Manager  determines
that such inclusion will not adversely  affect the prospects for success of such
offering.

                  12.  ADJUSTMENT  UPON  CHANGES  IN   CAPITALIZATION.   Without
limitation to any  restriction on OPTION GRANTOR  contained in this Agreement or
in the Merger  Agreement,  in the event of any change in OPTION  GRANTOR  Common
Stock by reason of stock dividends,  splitups,  mergers (other than the Merger),
recapitalizations,  combinations,  exchange of shares or the like,  the type and
number of shares or securities  subject to the OPTION  GRANTOR  Option,  and the
purchase price per share provided in Section 1, shall be adjusted  appropriately
to  restore  to OPTION  HOLDER  its  rights  hereunder,  including  the right to
purchase from OPTION GRANTOR (or its successors) shares of OPTION GRANTOR Common
Stock (or such other shares or securities into which

                                     - 14 -

<PAGE>

OPTION GRANTOR Common Stock has been so changed)  representing the Option Shares
Percentage of the Initial  Number of shares of OPTION  GRANTOR  Common Stock for
the aggregate  Exercise  Price  calculated  as of the date of this  Agreement as
provided in Section 1.

                  13. RESTRICTIVE LEGENDS. Each certificate  representing OPTION
GRANTOR Shares issued to OPTION HOLDER  hereunder,  and OPTION HOLDER Shares, if
any,  delivered  to  OPTION  GRANTOR  at a  Closing,  shall  include a legend in
substantially the following form:

         THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED
         UNDER THE SECURITIES ACT OF 1933, AS AMENDED,  OR ANY STATE  SECURITIES
         OR BLUE SKY LAWS, AND MAY BE REOFFERED OR SOLD ONLY IF SO REGISTERED OR
         IF AN EXEMPTION FROM SUCH  REGISTRATION  IS AVAILABLE.  SUCH SECURITIES
         ARE ALSO SUBJECT TO ADDITIONAL RESTRICTIONS ON TRANSFER AS SET FORTH IN
         THE OPTION HOLDER STOCK OPTION AND TRIGGER PAYMENT AGREEMENT,  DATED AS
         OF NOVEMBER 10,  1995, A COPY OF WHICH MAY BE OBTAINED  FROM THE ISSUER
         UPON REQUEST.

It is understood and agreed that:

                           (i) the reference to the resale  restrictions  of the
         Securities  Act and  state  securities  or Blue Sky  laws in the  above
         legend  shall be  removed  by  delivery  of  substitute  certificate(s)
         without such reference if OPTION HOLDER or OPTION GRANTOR,  as the case
         may be, shall have delivered to the other party a copy of a letter from
         the staff of the SEC, or an opinion of counsel,  in form and  substance
         satisfactory  to the other party, to the effect that such legend is not
         required for purposes of the Securities Act or such laws;

                           (ii)  the   reference  to  the   provisions  to  this
         Agreement  in  the  above  legend  shall  be  removed  by  delivery  of
         substitute  certificate(s)  without  such  reference if the shares have
         been sold or  transferred  in  compliance  with the  provisions of this
         Agreement and under  circumstances that do not require the retention of
         such reference; and

                           (iii) the legend  shall be removed in its entirety if
         the  conditions  in  the  preceding  clauses  (i)  and  (ii)  are  both
         satisfied.

In addition, such certificates shall bear any other legend as may be required by
law.  Certificates  representing  shares sold in a  registered  public  offering
pursuant  to  Section 11 shall not be  required  to bear the legend set forth in
this Section 13.

                  14.   BINDING   EFFECT;   NO   ASSIGNMENT;   NO  THIRD   PARTY
BENEFICIARIES. (a) This Agreement shall be binding upon and inure to the benefit
of the parties hereto and their respective successors and permitted assigns.

                                     - 15 -

<PAGE>

                  (b)  Except  as  expressly  provided  for in  this  Agreement,
neither this  Agreement nor the rights or obligations of either party hereto are
assignable, except by operation of law, or with the written consent of the other
party.

                  (c) Nothing  contained in this Agreement,  express or implied,
is intended to confer  upon any person  other than the parties  hereto and their
respective  permitted assigns any rights or remedies of any nature whatsoever by
reason of this Agreement.

                  (d) Any Restricted  Shares sold by a party in compliance  with
the provisions of Section 11 shall,  upon  consummation of such sale, be free of
the restrictions  imposed with respect to such shares by this Agreement,  unless
and until such party shall  repurchase or otherwise  become the beneficial owner
of such shares,  and any  transferee of such shares shall not be entitled to the
registration rights of such party.

                  15.  SPECIFIC  PERFORMANCE.  The  parties  hereto  agree  that
irreparable  harm would  occur in the event that any of the  provisions  of this
Agreement were not performed in accordance  with their  specified  terms or were
otherwise  breached.  It is accordingly  agreed that the parties hereto shall be
entitled to an injunction or injunctions  to prevent  breaches of this Agreement
and to enforce  specifically the terms and provisions hereof in any court of the
United  States or any state having  jurisdiction,  this being in addition to any
other remedy to which they are entitled at law or equity.

                  16. VALIDITY.  (a) The invalidity or  unenforceability  of any
provision of this Agreement shall not affect the validity or  enforceability  of
the other  provisions  of this  Agreement,  which shall remain in full force and
effect.

                  (b) In the event any court or other competent  authority holds
any provisions of this Agreement to be null, void or unenforceable,  the parties
hereto shall  negotiate in good faith the execution and delivery of an amendment
to this Agreement in order, as nearly as possible, to effectuate,  to the extent
permitted  by law,  the  intent  of the  parties  hereto  with  respect  to such
provision and the economic effects thereof.

                  (c)  Subject to Section 5, if for any reason any such court or
regulatory agency determines that OPTION HOLDER is not permitted to acquire,  or
OPTION  GRANTOR is not permitted to  repurchase  pursuant to Section 8, the full
number of shares of OPTION GRANTOR Common Stock provided in Section 1 hereof (as
the same may be  adjusted),  it is the express  intention  of OPTION  GRANTOR to
allow OPTION HOLDER to acquire or to require OPTION  GRANTOR to repurchase  such
lesser  number  of  shares  as may  be  permissible  without  any  amendment  or
modification hereof.

                  (d)  Each  party  agrees  that,  should  any  court  or  other
competent  authority  hold any provision of this  Agreement or part hereof to be
null, void or unenforceable,  or order any party to take any action inconsistent
herewith,  or not take any action required herein,  the other party shall not be
entitled  to specific  performance  of such  provision  or part hereof or to any
other remedy,  including but not limited to money damages,  for breach hereof or
of any other  provision  of this  Agreement or part hereof as the result of such
holding or order.

                                     - 16 -

<PAGE>

                  17. NOTICES.  All notices and other  communications  hereunder
shall be in writing and shall be deemed given if (a)  delivered  personally,  or
(b) if sent by overnight courier service (receipt confirmed in writing),  or (c)
if delivered by facsimile  transmission  (with receipt  confirmed),  or (d) five
days  after  being  mailed by  registered  or  certified  mail  (return  receipt
requested)  to the parties in each case to the  following  addresses (or at such
other address for a party as shall be specified by like notice):

                  A.       If to OPTION HOLDER, to:

                           IES Industries Inc.
                           IES Tower
                           200 First Street S.E.
                           Cedar Rapids, Iowa  52401

                           Attention:  Lee Liu
                           Fax:  (319) 398-4204

                           with a copy to:

                           Winthrop, Stimson, Putnam & Roberts
                           One Battery Park Plaza
                           New York, New York  10004-1490

                           Attention:  Stephen R. Rusmisel, Esq.
                           Fax:  (212) 858-1500

                  B.       If to OPTION GRANTOR, to:

                           Interstate Power Company
                           1000 Main Street
                           Dubuque, Iowa  52004-0789

                           Attention:  Wayne H. Stoppelmoor
                                       Chairman
                           Fax:  (319) 557-2202

                           with a copy to:

                           Milbank, Tweed, Hadley & McCloy
                           1 Chase Manhattan Plaza
                           New York, New York  10005-1413

                           Attention:  John T. O'Connor, Esq.
                           Fax:  (212) 530-5219

                  18.  GOVERNING  LAW. This  Agreement  shall be governed by and
construed in  accordance  with the laws of the State of Delaware  applicable  to
agreements

                                     - 17 -

<PAGE>

made and to be performed  entirely  within such State and without  regard to its
choice of law principles or to any  requirement as to jurisdiction or service of
process contained in Section 2708 of Title 6 of the Delaware Code.

                  19.      INTERPRETATION.

                  (a) When  reference  is made in this  Agreement  to  Articles,
Sections or Exhibits, such reference shall be to an Article,  Section or Exhibit
of this Agreement, as the case may be, unless otherwise indicated.

                  (b) The  table of  contents  and  headings  contained  in this
Agreement are for reference purposes and shall not affect in any way the meaning
or interpretation of the Agreement.

                  (c) Whenever the words  "include,"  "includes," or "including"
are used in this  Agreement,  they shall be deemed to be  followed  by the words
"without limitation."

                  (d)  Whenever  "or"  is used in this  Agreement  it  shall  be
construed in the nonexclusive sense.

                  20.  COUNTERPARTS;  EFFECT.  This Agreement may be executed in
one or more counterparts,  each of which shall be deemed to be an original,  but
all of which shall constitute one and the same agreement.

                  21. AMENDMENTS;  WAIVER.  This Agreement may be amended by the
parties  hereto and the terms and  conditions  hereof  may be waived  only by an
instrument in writing signed on behalf of each of the parties hereto, or, in the
case of a waiver,  by an  instrument  signed  on  behalf  of the  party  waiving
compliance.

                  22. EXTENSION OF TIME PERIODS.  The time periods for exercises
of certain  rights under  Sections 2, 7 and 8 shall be extended (but in no event
by more than six months):

                  (a) to the extent necessary to obtain all regulatory approvals
for the exercise of such rights, and for the expiration of all statutory waiting
periods; and

                  (b) to the  extent  necessary  to avoid  any  liability  under
Section 16(b) of the Exchange Act by reason of such exercise.



                      THIS SPACE INTENTIONALLY LEFT BLANK





                                     - 18 -

<PAGE>


                  IN WITNESS  WHEREOF,  the  parties  hereto  have  caused  this
Agreement to be executed by their respective duly authorized  officers as of the
date first above written.

                                         INTERSTATE POWER COMPANY


                                         By:/s/ WAYNE H. STOPPELMOOR
                                            ------------------------
                                            Name:   Wayne H. Stoppelmoor
                                            Title:  President, Chief Executive
                                                     Officer and Chairman of
                                                     the Board


                                         IES INDUSTRIES INC.


                                         By:/s/ LEE LIU
                                            -----------
                                            Name:   Lee Liu
                                            Title:  Chairman of the Board,
                                                     President and Chief
                                                     Executive Officer




                                     - 19 -

<PAGE>

                       NEWS RELEASE -- November 11, 1995
                 Cedar Rapids, IA, Dubuque, IA and Madison, WI

The joint  combination of IES Industries Inc.,  Interstate Power Company and WPL
Holdings,  Inc.,  resulting  in the  holding  company to be known as  Interstate
Energy Corporation,  will become the first three-way  combination in the utility
industry.

IES  Industries  Inc.,  Interstate  Power Company and WPL Holdings,  Inc.  today
announced the signing of a merger agreement providing for the combination of the
three  companies.  The  resulting  holding  company will be known as  Interstate
Energy Corporation.

The strategic  combination has been approved by the respective companies' boards
of directors and will result in a corporation  with a market  capitalization  of
approximately  $2 billion  and assets of nearly $4  billion.  Interstate  Energy
Corporation will rank 34th in the nation among utility holding companies,  based
on 1994 revenues.

The transaction will be structured as a tax-free, stock-for-stock merger. In the
merger,  holders of IES Industries  Inc. common stock will receive .98 shares of
WPL Holdings  common stock for each share of IES  Industries  Inc.  common stock
they own on the  effective  date of the  merger.  Holders  of  Interstate  Power
Company  common stock will receive 1.11 shares of WPL Holdings  common stock for
each  share of  Interstate  Power  Company  stock  they own,  and  owners of WPL
Holdings  common stock will retain the number of shares of common stock they own
on the  effective  date.  All shares of common  stock are listed on the New York
Stock Exchange.

The dividend at the effective date of the merger will be the dividend then being
paid by WPL Holdings.  Subsequent dividend policy will be developed by the board
of directors of Interstate Energy Corporation.

After the  combination,  Wisconsin Power and Light Company,  IES Utilities,  and
Interstate  Power  Company  will  continue  to operate  under those names as the
principal  subsidiaries  of  Interstate  Energy  Corporation.  WPL Holdings will
change its name to Interstate Energy Corporation.  IES Diversified and Heartland
Development  Corporation  will be  combined  under  one  entity  to  manage  the
diversified  operations at Interstate Energy  Corporation.  Initially,  facility
headquarters will be as follows: IES Utilities in Cedar Rapids; Interstate Power
Company in Dubuque;  Wisconsin Power and Light and Interstate Energy Corporation
in Madison.

The combination of these three quality  utilities with similar service territory
characteristics will provide substantial  competitive and operational advantages
within the  region in the face of utility  deregulation.  The  combination  will
enable  the  operating  companies  to  maintain  low rates  and a high  level of
customer service, and enhance

<PAGE>

future  shareowner  value as well.  Estimated  savings from the  combination are
projected to be approximately  $700 million over the next 10 years. The majority
of these  savings  will  come  through  economies  of scale and  elimination  of
redundancies among the three companies.

The  strategic and financial  benefits  produced by this merger are  compelling.
This transaction provides  shareowners  ownership in a company with earnings and
dividend growth superior to that which each can achieve on a stand-alone  basis.
Shareowners  will  participate  in a  balanced,  larger  company  that is better
prepared to face competitive pressures.

After  the  combination,  Lee  Liu,  presently  chairman,  president  and  chief
executive  officer of IES  Industries,  will serve as  chairman  of the board of
Interstate Energy  Corporation.  Wayne H. Stoppelmoor,  chairman,  president and
chief executive officer of Interstate Power Company,  will be the vice chairman.
Erroll B. Davis Jr.,  chairman,  president  and chief  executive  officer of WPL
Holdings will become president and chief executive  officer of Interstate Energy
Corporation. Two years after the combination, Liu and Stoppelmoor will step down
and Davis will succeed Liu as chairman.

The new, combined organization will serve more than 850,000 electric and 360,000
natural gas customers in Iowa,  Illinois,  Minnesota and Wisconsin.  In addition
WPL Holdings,  through its Heartland Development Corporation  subsidiaries,  has
offices  in  25  states  and  two  foreign   countries.   IES   Diversified  has
non-regulated  energy  businesses with eight offices in six states and interests
in a utility in New Zealand. The new holding company will consist of utility and
non-utility operations.

"The combination of these companies will create  significant  long-term benefits
for our employees,  customers and  shareholders,"  Liu said.  "Interstate Energy
Corporation  will be  well-positioned  to build on its  strengths  as a low-cost
energy provider and committed  community partner.  That strategy should generate
opportunities for our employees and shareholders."

"The electric  utility world is changing  around us and we must be ready for the
new competition  era. This strategic  combination  will ensure our position in a
competitive  regional  market,  as well as offer  us  opportunities  for  better
customer service and continued low rates," stated Stoppelmoor.

"I have said for some time that  alliances  would be a  significant  part of WPL
Holdings'  strategy  for the  future,"  commented  Davis.  "We intend to provide
better customer service at competitive rates, while increasing shareowner value.
This  combination  will move us well  along  toward  becoming a  regionally  and
nationally competitive energy company."

The  combination  is  subject  to  approval  by the  shareowners  of  all  three
companies,  the utility commissions in Illinois,  Iowa, Minnesota and Wisconsin,
the Securities and

                                      -2-

<PAGE>

Exchange Commission,  the Federal Energy Regulatory Commission,  and the Nuclear
Regulatory  Commission.  The  merger is also  subject to the  expiration  of the
applicable  waiting period under the  Hart-Scott-Rodino  Antitrust  Improvements
Act. It is a condition of closing that the parties receive an opinion of counsel
to the effect that the exchange of stock  qualifies  as a tax-free  transaction,
and  obtain  appropriate  accountant  assurances  that the  transaction  will be
accounted for as a pooling of interests.  Preliminary  proxy  materials  will be
filed with the Securities and Exchange  Commission in the near future.  Based on
optimal times for the required regulatory  approvals,  the merger is expected to
be completed by early 1997.


OWNERSHIP INFORMATION

As of the close of business on November 10, 1995,  WPL  Holdings,  Inc. had 30.8
million  shares  outstanding,  IES  Industries  Inc.  had  29.3  million  shares
outstanding  and Interstate  Power Company had 9.6 million  shares  outstanding.
Accordingly,  43.9 percent of the common equity of Interstate Energy Corporation
will be held by existing WPL Holdings shareholders, 40.9 percent by existing IES
Industries  shareholders  and 15.2 percent by Interstate  Power  Company  common
shareholders.  The  preferred  stock of  Interstate  Power  Company  will remain
outstanding after the transaction.

The Board of Directors of Interstate Energy  Corporation will be composed of six
directors to be nominated by WPL Holdings,  six directors to be nominated by IES
Industries and three directors to be nominated by Interstate Power Company.


CORPORATE PROFILES

IES Industries Inc.

IES  Industries  Inc.  was  created in July,  1991 by the merger of two  utility
holding  companies - I.E.  Industries Inc. and Iowa Southern Inc. The subsidiary
utility  of IES  Industries  Inc.  - IES  Utility - was  created  following  the
December 31, 1993, merger of Iowa Electric Light and Power Co. and Iowa Southern
Utilities  Co.  IES  Industries  is  a  diversified  holding  company  with  two
wholly-owned  subsidiaries,  IES  Utilities and IES  Diversified.  IES Utilities
serves 330,000 electric customers and 173,000 natural gas customers in more than
500 communities  across 23,000 square miles of Iowa. It also provides  wholesale
electrical service to 30 municipal  utilities.  IES Diversified has interests in
energy, telecommunications and transportation businesses.

IES Utilities has a peak generating  capacity of 1,875 megawatts.  Fifty percent
comes from fossil fuel, 26 percent from the nuclear  powered Duane Arnold Energy
Center and 24 percent from purchased  power.  The company's  combined  operating
revenues for 1994 were $785,864,000 with net income of $66,818,000 and assets of
more than $1.8 billion. IES Industries is headquartered in Cedar Rapids.

                                      -3-

<PAGE>

Interstate Power Company

Interstate  Power  Company is a combined gas and electric  utility  which serves
approximately 10,000 square miles of territory in northwest Illinois,  northeast
Iowa and southern  Minnesota.  It has 162,000 retail electric and 48,600 natural
gas customers in 242 communities. The company also serves 19 wholesale municipal
utilities throughout the region and is headquartered in Dubuque, Iowa.

Interstate  Power  has a  peak  generating  capability  of  approximately  1,300
megawatts.  Sixty-two  percent of its energy comes from fossil  fuels,  with the
remainder coming from purchased  sources.  The company's 1994 operating revenues
were  $307,650,612  with net income of $20,666,612  and assets of more than $600
million.


WPL Holdings, Inc.

WPL  Holdings,  Inc.,  with  headquarters  in Madison  is the parent  company of
Wisconsin  Power and  Light and  Heartland  Development  Corporation.  Under its
utility  subsidiary,  the company  serves  370,000  electric  retail and 140,000
natural gas customers in more than 600  communities  over 16,000 square miles of
territory  in  south  central  Wisconsin.   It  also  serves  30  municipal  and
cooperative  utilities with  wholesale  power.  Wisconsin  Power and Light has a
generating  capacity of 2,200 megawatts.  Approximately 65 percent of its energy
comes from fossil fuel  sources,  14 percent  from the  Kewaunee  Energy  Center
nuclear  facility,  2 percent  from  hydro and about 19 percent  from  purchased
sources.

The company's  non-regulated  subsidiary,  Heartland Development Corporation has
investments in energy,  affordable  housing and environmental  businesses,  with
offices in 25 states and in two foreign countries.

WPL Holdings'  combined  operating  revenues for 1994 was $816,159,000  with net
income of $65,250,000. The company had combined assets of $1.6 billion.


MEDIA CONTACTS

Diane Ramsey @ IES Industries Inc. 319-398-7288 (319-375-0651 - pager)
Terry Harrmann @ Interstate Power Company 319-557-2215 (no pager)
Linda Brei @ WPL Holdings, Inc. 608-252-3081 (608-277-7120 - pager)

                                      -4-

<PAGE>


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