MDU RESOURCES GROUP INC
S-3, 1996-06-17
GAS & OTHER SERVICES COMBINED
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      AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON JUNE 17, 1996

                                                           REGISTRATION NO. 333-
================================================================================
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                                   ----------
                                    FORM S-3
                             REGISTRATION STATEMENT
                                      UNDER
                           THE SECURITIES ACT OF 1933
                                   ----------

                            MDU RESOURCES GROUP, INC.

             (Exact name of registrant as specified in its charter)

                DELAWARE                               41-0423660
   (State or other jurisdiction of          (I.R.S. Employer Identification No.)
    incorporation or organization)

                             400 NORTH FOURTH STREET
                          BISMARCK, NORTH DAKOTA 58501
                                 (701) 222-7900

       (Address, including zip code, and telephone number, including area
               code, of registrant's principal executive offices)

 HAROLD J. MELLEN, JR.          WARREN L. ROBINSON            RICHARD M. FARMER
  PRESIDENT AND CHIEF       VICE PRESIDENT, TREASURER AND     REID & PRIEST LLP
   EXECUTIVE OFFICER           CHIEF FINANCIAL OFFICER       40 WEST 57TH STREET
MDU RESOURCES GROUP, INC.      MDU RESOURCES GROUP, INC.           NEW YORK,
 400 NORTH FOURTH STREET        400 NORTH FOURTH STREET         NEW YORK  10019
      BISMARCK,                       BISMARCK,                 (212) 603-2000
 NORTH DAKOTA 58501              NORTH DAKOTA 58501
   (701) 222-7900                  (701) 222-7900

    (Names, addresses, including zip codes, and telephone numbers, including
                       area codes, of agents for service)
                                   ----------
     APPROXIMATE  DATE OF  COMMENCEMENT  OF PROPOSED  SALE PURSUANT TO THE PLAN:
From time to time after the effective date of this registration statement.

     If the only  securities  being  registered  on this Form are being  offered
pursuant to dividend or interest  reinvestment plans, please check the following
box. / /

     If any of the securities being registered on this Form are to be offered on
a delayed or continuous  basis  pursuant to Rule 415 under the Securities Act of
1933 other than securities  offered only in connection with dividend or interest
reinvestment plans, check the following box. /X/

     If this Form is filed to  register  additional  securities  for an offering
pursuant to Rule 462(b) under the Securities Act, please check the following box
and list  the  Securities  Act  registration  number  of the  earlier  effective
registration statement for the same offering. / /

     If this Form is a  post-effective  amendment  filed pursuant to Rule 462(c)
under the  Securities  Act,  check the following box and list the Securities Act
registration statement number of the earlier effective registration for the same
offering. / /

     If delivery of the  prospectus is expected to be made pursuant to Rule 434,
please check the following box. / /

                         CALCULATION OF REGISTRATION FEE

================================================================================

<TABLE>
<CAPTION>
                                                                PROPOSED         PROPOSED
                                                                 MAXIMUM          MAXIMUM          AMOUNT OF
         TITLE OF EACH CLASS OF               AMOUNT TO         OFFERING         AGGREGATE       REGISTRATION
       SECURITIES TO BE REGISTERED        BE REGISTERED (1)  PRICE PER UNIT   OFFERING PRICE          FEE
- ----------------------------------------------------------------------------------------------------------------
<S>                                       <C>                   <C>            <C>                    <C>
Common Stock, par value $3.33             3,000,000 Shares      $20.94(2)      $62,820,000(2)         $21,663
- ----------------------------------------------------------------------------------------------------------------
Preference Share Purchase Rights          3,000,000 Rights         --               --                --(3)
================================================================================================================
</TABLE>
(1)   In addition,  pursuant to Rule 416(a) under the Securities Act of 1933, as
      amended, this registration statement also covers any additional securities
      to be offered or issued in connection  with a stock split,  stock dividend
      or similar transaction.

(2)   Based on the average high and low prices on the composite tape on June 13,
      1996, pursuant to Rule 457(c).

(3)   Since no separate  consideration is paid for the Preference Share Purchase
      Rights  (Rights),  the registration fee for such securities is included in
      the fee for the Common Stock.  The value  attributable  to the Rights,  if
      any, is reflected in the market price of the Common Stock.

                                   ----------

     PURSUANT TO RULE 429 UNDER THE SECURITIES ACT OF 1933, THE PROSPECTUS FILED
AS A PART OF THIS REGISTRATION  STATEMENT WILL BE USED AS A COMBINED  PROSPECTUS
IN CONNECTION WITH THIS REGISTRATION  STATEMENT AND REGISTRATION  STATEMENT FILE
NO. 33-66682.

     The registrant  hereby amends this  registration  statement on such date or
dates as may be necessary to delay its effective date until the registrant shall
file a further  amendment  which  specifically  states  that  this  registration
statement  shall  thereafter  become  effective on such date as the  Commission,
acting pursuant to said Section 8(a), may determine.
================================================================================

<PAGE>

INFORMATION   CONTAINED  HEREIN  IS  SUBJECT  TO  COMPLETION  OR  AMENDMENT.   A
REGISTRATION  STATEMENT  RELATING  TO THESE  SECURITIES  HAS BEEN FILED WITH THE
SECURITIES  AND EXCHANGE  COMMISSION.  THESE  SECURITIES MAY NOT BE SOLD NOR MAY
OFFERS TO BUY BE ACCEPTED PRIOR TO THE TIME THE REGISTRATION  STATEMENT  BECOMES
EFFECTIVE.  THIS  PROSPECTUS  SHALL  NOT  CONSTITUTE  AN  OFFER  TO  SELL OR THE
SOLICITATION OF AN OFFER TO BUY NOR SHALL THERE BE ANY SALE OF THESE  SECURITIES
IN ANY JURISDICTION IN WHICH SUCH OFFER, SOLICITATION, OR SALE WOULD BE UNLAWFUL
PRIOR TO  REGISTRATION  OR  QUALIFICATION  UNDER THE SECURITIES LAWS OF ANY SUCH
JURISDICTION.


                   SUBJECT TO COMPLETION, DATED JUNE 17, 1996

PROSPECTUS
- ----------

                            MDU RESOURCES GROUP, INC.

                         AUTOMATIC DIVIDEND REINVESTMENT
                             AND STOCK PURCHASE PLAN

                                3,273,273 SHARES

                                  COMMON STOCK
                                (PAR VALUE $3.33)
                                   ----------
     The Automatic  Dividend  Reinvestment and Stock Purchase Plan (Plan) of MDU
Resources Group, Inc.  (Company) provides investors with a simple and convenient
method of purchasing  shares of the Company's  Common Stock,  without payment of
any brokerage commission or service charge.

     Participation  in the Plan is open to (1)  stockholders  of  record  of all
classes of the Company's  capital  stock,  (2) to the extent  described  within,
beneficial  owners of the  Company's  capital  stock  and (3)  other  interested
investors who are domiciled in the States of North Dakota, South Dakota, Montana
or Wyoming.

     Participants in the Plan may:

     -  reinvest dividends automatically on all or any specified number of their
        shares of the Company's  capital stock and/or 

     -  purchase  shares of Common Stock with optional cash payments of not less
        than $50 per  payment  and  not  more  than $5,000 per  month, including
        automatic  monthly  electronic funds transfers from their banks.

        Stockholders  of record and eligible  interested  investors  who wish to
join the Plan may enroll at any time by completing an Account Authorization Form
(Authorization Form) and returning it to Norwest Bank Minnesota, N.A. (Agent.)

        In order to join the Plan,  interested  investors  who are  eligible and
are not already stockholders of the Company must make an initial cash payment at
the time of enrollment of not less than $50, but not more than $5,000.

        Beneficial  owners whose  shares are held by  brokers or other  nominees
may  participate in the  reinvestment of dividends to purchase a whole number of
shares through participation by their brokers or nominees.

        Participants  who  wish to make  optional  cash   payments  by  means of
monthly  electronic  funds  transfers may do so by completing  and returning the
Authorization Form.

        The Company has amended the Plan  to allow  interested  investors in the
States of North Dakota, South Dakota,  Montana and Wyoming to participate in the
Plan. The Company may expand the Plan in the future to permit  participation  by
interested  investors in other  states where the Company has ongoing  operations
and perhaps in all 50 states.

        THIS PROSPECTUS  RELATES TO SHARES  OF COMMON STOCK OF THE COMPANY,  AND
THE PREFERENCE  SHARE PURCHASE RIGHTS ATTACHED THERETO  (RIGHTS),  AVAILABLE FOR
PURCHASE  UNDER THE PLAN. IT IS SUGGESTED  THAT THIS  PROSPECTUS BE RETAINED FOR
FUTURE REFERENCE.

                                   ----------
    THESE SECURITIES HAVE NOT BEEN APPROVED OR DISAPPROVED BY THE SECURITIES
       AND EXCHANGE COMMISSION OR ANY STATE SECURITIES COMMISSION NOR HAS
         THE SECURITIES AND EXCHANGE COMMISSION OR ANY STATE SECURITIES
             COMMISSION PASSED UPON THE ACCURACY OR ADEQUACY OF THIS
               PROSPECTUS. ANY REPRESENTATION TO THE CONTRARY IS A
                                CRIMINAL OFFENSE.
                                   ----------

            , 1996

<PAGE>

                              AVAILABLE INFORMATION

     The Company is subject to the informational  requirements of the Securities
Exchange Act of 1934, as amended  (Exchange  Act),  and in accordance  therewith
files reports and other information with the Securities and Exchange  Commission
(Commission).  Reports,  proxy  statements  and other  information  filed by the
Company with the  Commission  can be inspected  and copied at the offices of the
Commission, Room 1024, Judiciary Plaza, 450 Fifth Street, N.W., Washington, D.C.
20549;  7 World  Trade  Center,  13th  Floor,  New  York,  New York  10048;  and
Northwestern  Atrium  Center,  500 West  Madison  Street,  Suite 1400,  Chicago,
Illinois  60661.  Copies of such  material can also be obtained  from the Public
Reference  Section of the Commission at its principal office at Judiciary Plaza,
450 Fifth Street, N.W.,  Washington,  D.C. 20549 at prescribed rates. The Common
Stock is listed on the New York and  Pacific  Stock  Exchanges.  Reports,  proxy
statements and other information concerning the Company can also be inspected at
the offices of such Exchanges.

                 INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

     The  following  documents  filed by the  Company  with the  Commission  are
incorporated herein by reference:

     1. The Company's Annual Report on Form 10-K for the year ended December 31,
1995; and

     2. The Company's  Quarterly Report on Form 10-Q for the quarter ended March
31, 1996.

     All documents filed by the Company pursuant to Section 13(a),  13(c), 14 or
15(d) of the  Exchange  Act after the date of this  Prospectus  and prior to the
termination  of  the  offering  of  the  Common  Stock  shall  be  deemed  to be
incorporated by reference in this Prospectus.

     Any  statement  contained  in a  document  incorporated  or  deemed  to  be
incorporated  by reference  herein shall be deemed to be modified or  superseded
for purposes of this Prospectus to the extent that a statement  contained in any
other  subsequently  filed  document which is deemed to be  incorporated  herein
modifies  or  supersedes  such  statement.  Any such  statement  so  modified or
superseded  shall  not be  deemed,  except  as so  modified  or  superseded,  to
constitute a part of this Prospectus.

     The Company  undertakes to provide  without charge to each person to whom a
copy of this  Prospectus has been  delivered,  on the written or oral request of
any such person,  a copy of any or all of the documents  referred to above which
have been or may be  incorporated  in this  Prospectus by reference,  other than
exhibits to such documents  (unless such exhibits are specifically  incorporated
by reference into such  documents).  Requests for such copies should be directed
to: Office of the Treasurer, MDU Resources Group, Inc., 400 North Fourth Street,
Bismarck, North Dakota 58501, telephone (701) 222-7900.

                                   THE COMPANY

     The Company is the issuer of the Common  Stock,  par value  $3.33,  offered
hereby (Common Stock).

     The  Company  is  a  diversified   natural   resource   company  which  was
incorporated  under the laws of the State of  Delaware  in 1924.  Its  principal
executive offices are at 400 North Fourth Street,  Bismarck, North Dakota 58501,
telephone (701) 222-7900.

     Montana-Dakota  Utilities Co., the public utility  division of the Company,
provides electric and/or natural gas and propane  distribution service at retail
in North Dakota, eastern Montana, northern and western South Dakota and northern
Wyoming,  and owns and  operates  electric  power  generation  and  transmission
facilities. The Company, through its wholly owned subsidiary,  Centennial Energy
Holdings,  Inc., owns Williston Basin  Interstate  Pipeline  Company  (Williston
Basin),  Knife River Coal Mining Company  (Knife River),  the Fidelity Oil Group
(Fidelity Oil) and Prairielands Energy Marketing, Inc. (Prairielands). Williston
Basin produces natural gas and provides underground storage,  transportation and
gathering services through an interstate pipeline system serving Montana,  North
Dakota,  South Dakota and  Wyoming.  Knife River  surface  mines and markets low
sulfur  lignite coal at mines located in Montana and North  Dakota,  and through
its wholly owned  subsidiary,  KRC  Holdings,  Inc.,  surface  mines and markets
aggregates and related  construction  materials in the  Anchorage,  Alaska area,
southern Oregon, north central California and the Hawaiian Islands. Fidelity Oil
owns oil and natural gas interests in the western United States,  the Gulf Coast
and Canada  through  investments  with  several oil and  natural gas  producers.
Prairielands seeks new energy markets while continuing to expand present markets
for natural  gas.  Its  activities  include  buying and selling  natural gas and
arranging transportation services to end users, pipelines and local distribution
companies  and,  through its wholly owned  subsidiary,  Prairie  Propane,  Inc.,
operating  bulk  propane  facilities  in north  central and  southeastern  North
Dakota.

                                       2
<PAGE>

                             DESCRIPTION OF THE PLAN

     Following are the provisions of the Plan in a question and answer format:

PURPOSE

1.   WHAT IS THE PURPOSE OF THE PLAN?

     The  purpose  of the Plan is to  provide  participants  in the Plan  with a
simple and  convenient  method of  automatically  investing  all or a portion of
their cash dividends  and/or making optional cash payments to purchase shares of
Common Stock of the Company,  without  payment of any  brokerage  commission  or
service  charge.  When  shares  of  Common  Stock  purchased  under the Plan are
purchased from the Company,  the Company will receive  additional  equity funds.
See "Use of Proceeds".

ADVANTAGES AND DISADVANTAGES

2.   WHAT ARE THE ADVANTAGES OF THE PLAN?

     Participants in the Plan may (a) have cash dividends on all or a portion of
their shares of any class of the Company's capital stock registered in their own
names  automatically  reinvested  and/or  (b)  invest  by making  optional  cash
payments of not less than $50 per payment and not more than $5,000 per month. No
brokerage  commission or service  charge is paid by  participants  in connection
with purchases  under the Plan.  Full  investment of funds is possible under the
Plan because the Plan permits fractions of shares, as well as full shares, to be
credited to participants' accounts. In addition,  dividends with respect to such
fractions,  as well as full shares,  will be reinvested in additional shares and
such  shares  credited to  participants'  accounts.  Participants  can avoid the
cumbersome  safekeeping of  certificates  for shares  credited to their accounts
under the Plan, since stock certificates will not be issued for shares purchased
under  the  Plan  unless  requested.   Regular  statements  of  account  provide
simplified record keeping.

     Participants  may  also  make  optional  cash  payments   automatically  by
authorizing the Agent to withdraw such payments monthly from their bank accounts
by means of electronic funds transfers.

     Beneficial  owners whose shares are  registered  in the names of brokers or
other nominees may also participate in the Plan, as described in Question 7.

3.   ARE THERE ANY DISADVANTAGES TO THE PLAN?

     Since shares are purchased on specified dates or during  specified  periods
and are sold (if so  requested by the  participant)  on the open market on dates
determined  by the Agent,  participants  have no control over the price at which
shares are purchased or sold for their accounts.  Therefore,  participants  bear
the risk of fluctuations in the market price of Common Stock.

     In  addition,  no  interest  is paid on  funds  held by the  Agent  pending
investment under the Plan.

ADMINISTRATION

4.   WHO ADMINISTERS THE PLAN?

     Norwest Bank Minnesota,  N. A.  administers the Plan,  purchases  shares as
agent  for  participants,  serves  as  custodian  of  shares  held in the  Plan,
maintains  records,  sends  statements of account to  participants  and performs
other duties  relating to the Plan.  Shares of Common Stock  purchased under the
Plan  will  be  registered  in  the  name  of the  Agent  or  its  nominee.  All
correspondence concerning the Plan should be addressed as follows:

         MDU Resources Group, Inc.
         c/o Norwest Shareowner Services
         Invest Direct
         PO Box 64863
         Saint Paul, MN  55164-0863

     If you need  assistance  or have any questions  regarding the Plan,  please
write  the  Agent  at  the  above  address  or  call  the  Agent  toll  free  at
1-888-291-3713.

                                       3
<PAGE>

PARTICIPATION

5.   WHO IS ELIGIBLE TO PARTICIPATE?

     Any holder of record of shares of any class of the Company's  capital stock
is eligible to participate in the Plan.  Beneficial owners whose shares are held
by brokers or other nominees may participate as described in Question 7.

     Other  interested  investors who are  individuals  domiciled,  or which are
corporations or other legal entities whose principal  places of business are, in
the States of North Dakota, South Dakota,  Montana or Wyoming, may also join the
Plan.

6.  HOW DO STOCKHOLDERS OF RECORD AND ELIGIBLE INTERESTED INVESTORS PARTICIPATE?

     A holder of record of shares of any class of the  Company's  capital  stock
may join the Plan at any time by completing the Authorization Form and returning
it to the  Agent.  An  Authorization  Form must be signed by or on behalf of the
holder of record. When shares are owned by joint tenants, all must sign. When an
Authorization Form is signed by an executor, administrator, trustee or guardian,
or as attorney,  the capacity in which the Authorization  Form is signed must be
specified.  An Authorization Form of a corporate or other  organizational  owner
should be signed by an authorized officer or other official identified as such.

     Other  interested  investors who are  individuals  domiciled,  or which are
corporations or other legal entities whose principal  places of business are, in
the States of North Dakota, South Dakota,  Montana or Wyoming, may join the Plan
by completing an Authorization Form and returning it to the Agent accompanied by
a payment of not less than $50 and not more than $5,000.

7.   HOW MAY BENEFICIAL OWNERS PARTICIPATE IN THE PLAN?

     Beneficial  owners of shares of any class of the Company's  capital  stock,
whose  shares are held by  brokers or other  nominees,  may  participate  in the
dividend  reinvestment  feature of the Plan, if their brokers or other  nominees
elect to join the Plan on their behalf.  Reinvestment of dividends is limited to
the purchase of whole shares. Optional cash payments may not be made.

     Brokers and other nominees may  participate on behalf of beneficial  owners
by  completing a Broker and Nominee  Authorization  Form and returning it to the
Agent. If the Agent receives  written  instructions  from a broker or nominee no
later than the second  business day  following  each dividend  record date,  the
Agent  reinvests  that  dividend  in  accordance  with those  instructions.  The
reinvestment of dividends is limited with respect to each account  designated on
such Form to the  purchase  of the  largest  number of whole  shares that can be
purchased with the dividends  attributable to such account.  Any funds remaining
after reinvestment are remitted to the broker or other nominee. A dividend check
is mailed to the broker or nominee in the usual  manner for all shares for which
reinvestment  instructions are not received by the Agent.  Standing instructions
are not permitted.

     Since the Agent does not  maintain  records  as to, or hold  shares for the
accounts of, beneficial owner participants, such participants must look to their
brokers or other nominees for records of their participation and with respect to
the sale of  shares  purchased  with  reinvested  dividends  or the  receipt  of
certificates therefor.

     A beneficial owner may also participate in the Plan by becoming a holder of
record.  In order to participate in the Plan as a holder of record, a beneficial
owner of shares of common and/or  preferred stock whose shares are registered in
names other than his own may have some or all of these shares transferred to his
name. He can then participate in the Plan as a record owner.

8.   WHAT ARE THE ENROLLMENT DEADLINES?

     If an Authorization Form directing reinvestment of dividends is received by
the  Agent  on or  before  the  dividend  record  date,  that  dividend  will be
reinvested in accordance with the participant's instructions in shares of Common
Stock,  and such shares will be credited to the  participant's  account.  If the
Authorization Form is received by the Agent after the record date, that dividend
will be paid in cash,  and  reinvestment  will  begin  with  the next  dividend.
Dividends  for both the common and  preferred  stocks are  normally  paid on the
first day of January,  April,  July and  October.  The  dividend  record date is
normally two weeks before the dividend payment date.

     Enrollment by eligible interested  investors or by stockholders who want to
make optional  cash  payments  only may be done at any time since  optional cash
payments are invested  monthly.  See Question 15 for the specific  cut-off dates
for investment each month.

                                       4
<PAGE>

9.   WHAT DOES THE AUTHORIZATION FORM PROVIDE?

     The  Authorization  Form  provides for  enrollment  in the Plan and for the
purchase of shares of Common  Stock  through the  following  investment  options
offered under the Plan:

     FULL  DIVIDEND  REINVESTMENT--Reinvest  cash  dividends in shares of Common
Stock on all shares of any class of the  Company's  capital stock held of record
by a participant.

     PARTIAL DIVIDEND  REINVESTMENT--Reinvest cash dividends in shares of Common
Stock on a  specified  number of shares  of any class of the  Company's  capital
stock held of record by a participant.

     OPTIONAL CASH PAYMENTS--Invest by making optional cash payments of not less
than $50 per  payment  and not more than  $5,000 per month.

     In each case,  cash  dividends  on shares of Common  Stock  credited to the
participant's  account  under  the  Plan  will be  automatically  reinvested  in
additional shares of Common Stock.

     Participants may change their investment  options at any time by requesting
a new Authorization Form from the Agent. For a change in investment option to be
effective with respect to a particular dividend, the new Authorization Form must
be received by the Agent on or before the dividend  record  date.

10.  WHERE CAN FORMS BE OBTAINED?

     Authorization Forms,  Automatic Monthly Deduction Forms, Broker and Nominee
Authorization  Forms, Cash Payment Forms and instructions may be obtained at any
time from the Agent. All forms should be returned to the Agent.

11.  MAY PARTICIPANTS GIVE TELEPHONE INSTRUCTIONS?

     Participants  may give  instructions  to the Agent by telephone  after they
have completed the appropriate  section on the Authorization Form and selected a
PIN number.  Through the use of this  feature,  participants  may obtain  forms,
change their  method or level of  participation  in the Plan,  sell Plan shares,
receive  certificates  for shares  credited under the Plan and withdraw from the
Plan by telephone. Participants cannot cancel or alter optional cash payments by
telephone. See Queston 17.

12.  ARE   THERE  ANY  EXPENSES TO  PARTICIPANTS  IN CONNECTION  WITH  PURCHASES
     UNDER THE PLAN?

     No. All costs of administration of the Plan are paid by the Company.  There
will be no brokerage  commissions or service  charges to  participants,  whether
shares are  purchased  from the Company or on the open  market or in  negotiated
transactions.  However,  in the event a participant  withdraws from the Plan and
requests  the  Agent to sell his  shares,  the  participant  will be  charged  a
brokerage commission and any other costs of the sale.

PURCHASES

13.  WHAT IS THE SOURCE OF SHARES PURCHASED UNDER THE PLAN?

     Shares of Common  Stock may be  purchased  by the Agent  directly  from the
Company, on the open market, in negotiated transactions, or a combination of the
foregoing.  The decision as to whether to purchase directly from the Company, on
the open  market  or in  negotiated  transactions  will take  into  account  the
Company's need for common equity and general market conditions.

14.  HOW MANY SHARES OF COMMON STOCK WILL BE PURCHASED FOR PARTICIPANTS?

     The  number  of  shares  to be  purchased  depends  on  the  amount  of the
participant's  reinvested  dividends,  optional cash payments,  or both, and the
price of the shares of Common Stock. Each participant's account will be credited
with that  number of  shares,  including  fractions  computed  to three  decimal
places,  equal to the total amount to be invested divided by the purchase price.
No participant  may designate a specific  number of shares to be purchased.  

15.  WHEN WILL  PURCHASES  OF SHARES OF COMMON  STOCK BE MADE AND WHAT WILL  THE
     PRICE BE?

     PURCHASES FROM THE COMPANY

     Shares  purchased from the Company with reinvested  dividends are purchased
and  credited  to  participants'  accounts  as of each  dividend  payment  date.
Dividend  payment dates for both the common and preferred  stock are usually the
first days of  January,  April,  July and  October.  Shares  purchased  from the
Company with optional  cash payments  received by the Agent by the last business
day of any month are purchased and credited to participants'  accounts as of the
first business day of the following  month.  Optional cash payments  received by
the Agent  subsequent  to the last  business  day of any  month  will be used to

                                       5
<PAGE>

purchase shares as of the first business day of the second  following month. For
example,  an optional cash payment  received after June 28, 1996 will be used to
purchase shares on August 1, 1996.

     The price of shares of Common Stock  purchased from the Company will be the
average of the high and low sales  prices  for such  shares as  reported  on the
composite tape for New York Stock Exchange listed  companies on (i) the dividend
payment date,  or the next day on which the New York Stock  Exchange is open, if
it is  closed  on the  dividend  payment  date,  or (ii) in the  case of  shares
purchased  during any month that is not a dividend  payment month, the first day
of the month or the next  business  day on which the New York Stock  Exchange is
open.

     OPEN MARKET OR NEGOTIATED PURCHASES

     When the Agent purchases  shares on the open market,  reinvested  dividends
are used by the Agent to purchase  shares  during the periods  commencing on the
dividend  payment date and ending at the  discretion of the Agent,  but no later
than the last  business  days of such January,  April,  July and October.  In no
event will dividends remain uninvested more than 30 days after the payment date.
Optional cash payments received no later than the last business day of any month
are used by the Agent to purchase shares during a period commencing on the first
business day of the next month and ending at the discretion of the Agent, but no
later than the last  business day of such month.  In no event will optional cash
payments  remain  uninvested  more than 35 days after receipt by the Agent.  The
number of shares purchased with reinvested  dividends and optional cash payments
on any day during each  purchase  period and the prices paid for such shares are
determined by the Agent. Shares purchased on the open market will be credited to
participants'  accounts as of the date on which all  purchases for the month are
settled.

     The  price of shares of Common  Stock  purchased  on the open  market or in
negotiated  transactions  will be the  weighted  average  price  for all  shares
purchased by the Agent for the Plan during the month.

OPTIONAL CASH PAYMENTS

16.  HOW DOES THE OPTIONAL CASH PAYMENT OPTION WORK?

     If a participant  has checked the  "Optional  Cash Payment Only" box on the
Authorization Form, the Company will pay cash dividends on any shares registered
in the participant's  name to the participant in the usual manner and will apply
any  optional  cash payment  received  from the  participant  to the purchase of
shares of Common  Stock for the  participant's  account.  Dividends  payable  on
shares of Common Stock credited to the account of the participant under the Plan
will be reinvested in additional shares of Common Stock.

     OPTIONAL  CASH PAYMENTS  RECEIVED  AFTER THE LAST BUSINESS DAY OF ANY MONTH
WILL BE INVESTED  THE SECOND  FOLLOWING  MONTH.  NO INTEREST IS PAID ON OPTIONAL
CASH PAYMENTS HELD FOR INVESTMENT. THEREFORE, IT IS TO A PARTICIPANT'S ADVANTAGE
TO MAIL OPTIONAL CASH PAYMENTS SO THEY ARE RECEIVED BY THE AGENT SHORTLY  BEFORE
THE LAST BUSINESS DAY OF ANY MONTH. SEE QUESTION 15.

17.  HOW ARE OPTIONAL CASH PAYMENTS MADE?

     An optional cash payment may not be less than $50 per payment nor more than
$5,000 per month.

     An optional cash payment may be made by a participant by forwarding a check
or money order in U.S.  dollars  made  payable to Norwest  Shareowner  Services,
accompanied by a Cash Payment Form.  Please do not send cash. The same amount of
money  need  not be sent  each  month,  and  there is no  obligation  to make an
optional cash payment each month.

     A  participant  who  changes  his mind and wants to cancel his most  recent
optional  cash  payment  must  notify the Agent in  writing.  The notice must be
received by the Agent  before  investment  and no later than two  business  days
before the end of the  month.  However,  no refund  will be made until the funds
from any check or money order have actually been collected by the Agent. Refunds
are made without interest.

18.  HOW DO AUTOMATIC CASH PAYMENTS WORK?

     A  participant  may elect to have  monthly  cash  payments in a  designated
amount automatically  charged against his bank account by completing and sending
to the Agent the  Automatic  Monthly  Deduction  Form.  The Agent  will make the
necessary  arrangements  with the  participant's  bank so that, on or about four
business days before the end of each month, the participant's  bank account will
be charged with the  designated  amount.  A participant  will not be required to
write any checks or mail any  additional  forms. A participant  may  discontinue
this  arrangement at any time by notifying the Agent in writing by the tenth day
of any month. A participant  may change the amount of the automatic cash payment

                                       6
<PAGE>

by completing a new  Automatic  Monthly  Deduction  Form and providing it to the
Agent by the tenth day of any month.

REPORTS TO PARTICIPANTS

19.  WHAT KIND OF REPORTS WILL BE SENT TO PARTICIPANTS IN THE PLAN?

     Participants  will be mailed a statement  every time a purchase is made for
them in the Plan. For instance,  participants  who reinvest  dividends under the
Plan will be sent a transaction statement in February, May, August and November.
If Plan shares are purchased  with  optional  cash payments  during a month when
dividend reinvestment is not occurring,  participants will be sent a transaction
statement  related to cash  investment  for that month.  These  statements are a
participant's  continuing  record  of the cost of his  purchases  and  should be
retained for income tax  purposes.  IT IS THE  PARTICIPANT'S  RESPONSIBILITY  TO
RETAIN  THESE  RECORDS.  THE AGENT WILL  CHARGE A  PARTICIPANT  $15 PER YEAR FOR
DUPLICATE STATEMENTS.

     In  addition,   each   participant   will   receive   copies  of  the  same
communications  sent to every other holder of shares of Common Stock,  including
the Company's  quarterly  reports,  annual report,  notice of annual meeting and
proxy statement, and income tax information for reporting dividends paid.

DIVIDENDS

20.  WILL PARTICIPANTS BE CREDITED WITH DIVIDENDS ON FRACTIONS OF SHARES?

     Yes, except as described in the response to Question 7.

CERTIFICATES FOR SHARES

21.  WILL CERTIFICATES BE ISSUED FOR SHARES OF COMMON STOCK PURCHASED?

     Ordinarily,  certificates  for shares of Common Stock  purchased  under the
Plan will not be issued to  participants.  The number of shares  credited  to an
account under the Plan will be shown on the participant's  statement of account.
This service protects against loss, theft or destruction of stock certificates.

     Certificates  for any number of whole shares  credited to an account  under
the Plan will be issued upon the written  request of a participant who wishes to
remain in the Plan.  This request  should be mailed to the Agent.  Any remaining
full  shares  and  fraction  of a share  will  continue  to be  credited  to the
participant's Plan account.

     Shares  credited to the account of a participant  under the Plan may not be
pledged as  collateral.  A  participant  who wishes to pledge  such  shares must
request that certificates for such shares be issued in his name.

     Certificates  for  fractions  of  shares  will  not  be  issued  under  any
circumstances.

22.  IN WHOSE NAME WILL CERTIFICATES BE REGISTERED WHEN ISSUED?

     Certificates for whole shares will be registered when issued in the name in
which the account under the Plan is maintained.

WITHDRAWAL

23.  WHEN MAY A PARTICIPANT WITHDRAW FROM THE PLAN?

     A participant may withdraw from the Plan at any time.

     If the request to withdraw is received by the Agent on or before the record
date for any cash  dividend  payment,  the  participant  shall be deemed to have
canceled his  participation and the amount of the dividend which otherwise would
have been invested will be paid to the withdrawing  participant.  All subsequent
cash dividends will be paid to him in cash unless he re-enrolls in the Plan.

     If the request to  withdraw  is  received  by the Agent  between a dividend
record date and the  completion of purchases  related to that payment date,  the
withdrawal will be effective as soon as those dividends are reinvested. The next
cash  dividend and all  subsequent  cash  dividends  will be paid to him in cash
unless he re-enrolls in the Plan.

     If a  request  to  withdraw  is  received  by the  Agent  not less than two
business  days before the end of any month,  any optional cash payment the Agent
is holding will be returned.  If the request is received  less than two business
days before the end of any month,  any optional  cash payment being held will be
invested, and the participant's withdrawal will be processed thereafter.

                                       7
<PAGE>

24.  HOW DOES A PARTICIPANT WITHDRAW FROM THE PLAN?

     A participant  may withdraw from the Plan by written  request to the Agent.
The form provided on the back of the  participant's  statement of account may be
used for this purpose.

     When a participant  withdraws from the Plan or upon termination of the Plan
by the Company,  if the participant  chooses the "share  settlement  option",  a
certificate  for whole shares of Common Stock  credited to his account under the
Plan will be  issued,  and a cash  payment  will be made for any  fraction  of a
share.

     The participant may, if he desires,  choose the "cash  settlement  option",
which provides for the sale of all of the shares of Common Stock, both whole and
fractional,  credited to his account  under the Plan.  If he requests such sale,
whole shares will be sold on the New York Stock  Exchange on the first  business
day after receipt of the request.  The participant  will receive the proceeds of
the sale, less any related brokerage commission, any other costs of the sale and
Federal income tax withheld (if the  participant is a foreign  stockholder or is
otherwise  subject to withholding  such as backup  withholding).  A cash payment
representing  the fractional  share,  if any,  credited to his account under the
Plan will be mailed  directly to the  participant.  Checks will be mailed to the
participant on the settlement date.

     Without  withdrawing  from the Plan, a participant may change the number of
shares owned by him  participating in the Plan or discontinue his  participation
with reinvested dividends.

25.  CAN A PARTICIPANT REJOIN THE PLAN?

     A participant  who  withdraws  from the Plan may rejoin the Plan by meeting
the requirements  set out in Question 6 or 7. Numerous  openings and closings of
an  account  are  costly,  so a  particular  request to rejoin the Plan could be
denied.

SALE OF SHARES

26.  WHAT  HAPPENS  WHEN A  PARTICIPANT  SELLS OR  TRANSFERS  ALL OF THE  SHARES
     REGISTERED IN HIS NAME HELD OUTSIDE THE PLAN? 

     If a  participant  disposes  of all  shares of Common  or  Preferred  Stock
registered  in his name held  outside  the  Plan,  the Agent  will  continue  to
reinvest  the  dividends  on the shares  credited to his account  under the Plan
until notified by such participant that he wishes to withdraw from the Plan.

27.  CAN A PARTICIPANT SELL SHARES UNDER THE PLAN?

     A participant can request the Agent to sell any Plan shares credited to his
account.  To continue to  participate  in the Plan, a  participant  must keep at
least  one whole  share in his Plan  account.  Shares  will be sold on the first
business day after  receipt of the request,  and a check for the proceeds of the
sale,  less any related  brokerage  commission  and any other costs of the sale,
will  be  mailed  to the  participant  on the  settlement  date.  

28.  WHAT IF A PARTICIPANT SELLS ALL HIS SHARES UNDER THE PLAN?

     As long as a participant's Plan account holds at least one whole share, the
account will remain active.  Any Plan account with less than one whole share may
be closed, and the participant will be sent an account history statement for the
current year and a check for any fractional  share,  less any related  brokerage
commission and any other costs of the sale.

OTHER INFORMATION

29.  WHAT  HAPPENS  IF  THE  COMPANY ISSUES A STOCK DIVIDEND OR DECLARES A STOCK
     SPLIT?

     Any stock  dividends or split shares  distributed  by the Company on shares
credited  to the  account of a  participant  under the Plan will be added to the
participant's  account.  Stock  dividends or split shares  distributed on shares
registered  in the  name of the  participant  will be  mailed  directly  to such
participant in the same manner as to stockholders  who are not  participating in
the Plan.

30.  HOW WILL A PARTICIPANT'S SHARES BE VOTED AT MEETINGS OF STOCKHOLDERS?

     If shares  registered in the name of a participant in the Plan are voted by
him by proxy card on any matter  submitted  to a meeting  of  stockholders,  the
total number of shares owned by the  participant,  I.E., both shares credited to
his account under the Plan and those  registered in the name of the participant,
will be shown on such proxy card and voted on such matter.

                                       8
<PAGE>

     If the proxy card is not  returned or if it is returned  unsigned,  none of
the participant's shares will be voted unless the participant votes in person.

31.  WHAT ARE THE FEDERAL INCOME TAX CONSEQUENCES OF PARTICIPATION IN THE PLAN?

     The  Federal  income  tax  consequences  to an  individual  or a  corporate
participant in the Plan may be summarized as follows:

          a.  With  respect  to  reinvested  cash  dividends  used  to  purchase
     authorized  but unissued  shares of Common  Stock,  a  participant  will be
     treated for Federal  income tax purposes as having  received a distribution
     in an amount equal to the fair market value on the dividend payment date of
     the full number of shares and  fractional  share of Common Stock  purchased
     with  reinvested  dividends.  The fair  market  value of such shares on the
     dividend   payment  date  will  be  treated  as  dividend   income  to  the
     participant. The basis of the shares so purchased will be equal to the fair
     market value of such shares on the dividend payment date.

          b. With  respect to  reinvested  cash  dividends  used by the Agent to
     purchase shares for  participants in the open market, a participant will be
     treated  for  Federal  income tax  purposes  as having  received a dividend
     distribution  in an amount equal to the cash  reinvested plus any brokerage
     commissions  paid by the  Company  to obtain the  shares.  The basis of the
     shares so  purchased  will be equal to the  amount  treated  as a  dividend
     distribution to the participant.

          c. A  participant  who  purchases  Common  Stock  with  optional  cash
     payments will recognize no taxable income upon such purchases except to the
     extent  of any  brokerage  commissions  paid by the  Company.  The basis of
     shares  purchased  in this manner will be the amount of the  optional  cash
     payment plus brokerage commissions.

          d. A participant's  holding period for shares of Common Stock acquired
     pursuant  to the Plan will begin on the day  following  the date the shares
     are credited to the participant's account.

          e. A  participant  will not  realize  taxable  income  as a result  of
     receipt of  certificates  for whole shares of Common Stock  credited to the
     participant's  account,  either  upon the  participant's  request for those
     shares or upon withdrawal from participation in or termination of the Plan.

          f. A  participant  will realize gain or loss when the shares of Common
     Stock are sold or exchanged,  and, in the case of a fractional  share, when
     the participant receives a cash payment for a fraction of a share of Common
     Stock   credited  to  the   participant's   account  upon   termination  of
     participation  in or  termination  of the Plan.  The amount of such gain or
     loss  will be the  difference  between  the  amount  that  the  participant
     receives  for the shares or fraction of a share and the tax basis  thereof.
     

     The  information  set forth above is only a summary and does not purport to
be a complete  description of all tax consequences of participation in the Plan.
The  description  may  be  affected  by  future  legislation,  IRS  rulings  and
regulations,   or  court  decisions.   In  addition,  the  taxation  of  foreign
stockholders,  except  as noted  below,  is not  discussed  in this  prospectus.
Accordingly,  participants  should  consult  with  their own tax  advisors  with
respect  to  the  Federal,   state,   local  and  foreign  tax  consequences  of
participation  in the Plan. The foregoing  discussion  assumes that all dividend
distributions are supported by earnings and profits of the Company.

32.  WHAT PROVISION   IS  MADE  FOR  FOREIGN  STOCKHOLDERS  WHOSE  DIVIDENDS ARE
     SUBJECT TO INCOME TAX WITHHOLDING?

     In the case of those foreign  stockholders  whose  dividends are subject to
United States income tax withholding, the Agent will apply the net amount of the
dividends of such foreign stockholders,  after the deduction of taxes (including
taxes owing by reason of the purchase of shares of Common Stock with  reinvested
Common  Stock  dividends),  to the  purchase  of  shares of  Common  Stock.  The
statements  confirming purchases made for foreign stockholders will indicate the
amount of Federal tax  withheld.  Income tax  withheld by the Company may not be
refunded by the Company but may be claimed as a credit on an individual  Federal
income tax return. If such foreign stockholders desire to invest the full amount
of their  dividends,  they may mail  optional  cash  payments to the Agent in an
amount  equal to the  amount of the tax  withheld,  even if less  than  $50.  In
addition,  withholding  will  occur on any sale of  shares if a  participant  is
subject to income tax  withholding.  The check sent to the  participant  will be
reduced by the amount of tax withheld,  any related brokerage commission and any
other costs of sale.

     Foreign stockholders who check the "Optional Cash Payments Only" box on the
Authorization  Form will continue to receive cash dividends on shares registered
in their names in the same manner as if they were not participating in the Plan.
Optional cash payments  received from them must be in United States  dollars and
will be invested in the same manner as  payments  from other  participants.

                                       9
<PAGE>

33.  WHAT IS THE RESPONSIBILITY OF THE COMPANY AND THE AGENT UNDER THE PLAN?

     Neither the Company nor the Agent will be liable in administering  the Plan
for any act done in good faith or for any good faith omission to act, including,
without  limitation,  any  claim of  liability  arising  out of the  failure  to
terminate a participant's account upon such participant's death prior to receipt
of notice in  writing  of such  death and with  respect  to the  prices at which
shares are purchased or sold for  participants'  accounts and the times at which
such purchases or sales are made;  provided,  however,  that such  limitation of
liability  shall  not  affect  any  rights  a  participant  may have  under  the
Securities Act of 1933 or other applicable federal securities laws.

     A  participant  should  recognize  that the Company  cannot assure him of a
profit or protect  him against a loss on the shares  purchased  by him under the
Plan.

34.  MAY THE PLAN BE CHANGED OR DISCONTINUED?

     The Company reserves the right to suspend,  modify or terminate the Plan at
any time.  Notice of any such  suspension,  modification or termination  will be
sent to all participants.

                                 USE OF PROCEEDS

     The  Company  will  receive  no  proceeds  from open  market or  negotiated
purchases.  The proceeds  from the purchase of Common  Stock  directly  from the
Company are expected to be used for corporate development  purposes,  including,
without  limitation,  acquisitions  made  by  or  on  behalf  of  the  Company's
subsidiaries and other general corporate purposes, and may include the repayment
of a portion of outstanding  short-term  borrowings incurred for those purposes.
The  Company has no basis for  estimating  either the number of shares of Common
Stock that will  ultimately  be sold pursuant to the Plan or the prices at which
such shares will be sold.

                           DESCRIPTION OF COMMON STOCK

     The Company's  authorized  capital stock  consists of 75,000,000  shares of
Common  Stock,  $3.33 par value,  500,000  shares of Preferred  Stock,  $100 par
value,  1,000,000  shares of Preferred  Stock A, without par value,  and 500,000
shares of Preference Stock, without par value.

     There  presently  are no shares of  Preference  Stock or Preferred  Stock A
outstanding.  At March 31, 1996,  there were  outstanding  28,476,981  shares of
Common Stock;  20,000 shares of 5.10% Preferred  Stock;  100,000 shares of 4.50%
Preferred Stock; and 50,000 shares of 4.70% Preferred Stock.

     The following  statements are summaries of certain  provisions with respect
to  the  Common  Stock  of  the  Company   contained  in  its   Certificate   of
Incorporation, as amended, as affected by certain rights of the holders, if any,
of the Company's Preferred Stock,  Preferred Stock A and Preference Stock and by
certain provisions of its Indenture of Mortgage,  dated May 1, 1939, between the
Company  and The New  York  Trust  Company  (The  Bank  of New  York,  successor
Corporate Trustee) and A.C. Downing (W.T. Cunningham,  successor Co-Trustee), as
restated in the Forty-fifth  Supplemental Indenture,  dated as of April 21, 1992
(Indenture of Mortgage).  Such statements,  which do not purport to be complete,
are  subject  in all  respects  to the full  provisions  of the  Certificate  of
Incorporation,  as amended, and the Indenture of Mortgage, to which reference is
made,  and to the laws of the State of  Delaware.  Reference is also made to the
Rights Agreement,  dated as of November 3, 1988 (Rights Agreement),  between the
Company and Norwest Bank Minnesota, N.A., as Rights Agent.

     Dividends  may be paid on the Common  Stock as  determined  by the Board of
Directors out of funds legally available  therefor but only if full dividends on
all outstanding series of the Preferred Stock,  Preferred Stock A and Preference
Stock for the then  current  and all prior  dividend  periods  and any  required
sinking fund payments with respect to any  outstanding  series of such Preferred
Stock, Preferred Stock A or Preference Stock have been paid or provided for. The
Company's Indenture of Mortgage contains certain  restrictions upon, among other
things,  the payment or declaration of cash dividends on shares of the Company's
Common Stock.

     The holders of the Common Stock have  exclusive  voting rights on the basis
of one vote per  share,  except as may be fixed and  determined  by the Board of
Directors in respect of series of the Preferred  Stock and Preferred Stock A, or
as set forth in the Certificate of  Incorporation,  as amended,  with respect to
the Preference Stock or as otherwise provided by law.

                                       10
<PAGE>

     Whenever the cumulative  dividends on  outstanding  series of the Preferred
Stock, Preferred Stock A or Preference Stock are in default and unpaid, in whole
or in part,  for a period of one year,  the holders of the  Preferred  Stock and
Preferred Stock A, or Preference Stock, as the case may be, shall be entitled to
the same voting rights as the holders of the Common  Stock,  namely one vote for
each share of Preferred Stock, Preferred Stock A or Preference Stock held, which
right  continues  until all arrears in the payment of the  cumulative  dividends
shall have been paid and the dividends  thereon for the current  dividend period
shall have been  declared  and the funds for the payment  thereof set aside.  In
addition,  the consent of the  holders,  if any,  of  specified  percentages  of
certain  series of the  Preferred  Stock and  Preferred  Stock A is  required in
connection   with  certain   amendments   to  the   Company's   Certificate   of
Incorporation,  as  amended,  and certain  increases  in  authorized  amounts or
changes in stock senior to the Common Stock.

     The  holders of the  Common  Stock are  entitled  in  liquidation  to share
ratably in the assets of the Company after required preferential payments to the
holders, if any, of the Preferred Stock, Preferred Stock A and Preference Stock.

     The Common Stock has no preemptive  or  conversion  rights and there are no
redemption or sinking fund provisions applicable thereto. The outstanding Common
Stock is fully paid and nonassessable.

     The Company's  Certificate of Incorporation,  as amended,  contains certain
provisions  which make it  difficult  to obtain  control of the Company  through
transactions not having the approval of the Board of Directors, including:

          A  provision  providing  for  classification  of the Board  into three
     classes  comprised  of as nearly  equal a number of  directors as possible,
     establishing  the method of  filling  any  vacancies,  and  providing  that
     directors may be removed only for cause;

          A provision  requiring the affirmative  vote of 80% of the outstanding
     shares of all classes of capital stock of the Company  entitled to vote for
     directors in order to authorize certain "Business  Combinations."  Any such
     Business Combination will also be required to meet certain "fair price" and
     procedural  requirements.  Neither an 80% stockholder vote nor "fair price"
     will be required for any Business  Combination  which has been  approved by
     two-thirds of the "Continuing Directors;"

          A provision  permitting  the Board of  Directors  to consider  certain
     specified factors in determining whether or not to approve certain Business
     Combinations;

          A provision  requiring that action by  stockholders be taken only at a
     stockholders'  meeting and limiting the ability of  stockholders  to call a
     special meeting; and

          A provision  providing  that certain  Articles of the  Certificate  of
     Incorporation,  as  amended,  cannot  be  altered  except  by  80%  of  the
     stockholders  entitled  to  vote  unless  approved  by  two-thirds  of  the
     Continuing Directors.

          The Common Stock is listed on the New York and Pacific Stock Exchanges
     (symbol: MDU).

     The  Transfer  Agent and  Registrar  for the Common  Stock is Norwest  Bank
Minnesota,  N.A.,  South  Saint  Paul,  Minnesota.  

     The Company has adopted a  Preference  Share  Purchase  Rights Plan (Rights
Plan). Each Right entitles the registered holder,  until the earlier of November
18,  1998 and the  redemption  of the  Rights,  to  purchase  from  the  Company
two-thirds of one  one-hundredth  (one  one-hundred-and-fiftieth)  of a share of
Series A Preference Stock (Preference Share) at an exercise price of $50 per one
one-hundredth  ($33.33 per one  one-hundred-and-fiftieth)  of a Preference Share
(Purchase Price), subject to certain adjustments.

     Capitalized  terms  used in the  following  description  and not  otherwise
defined herein have the meanings set forth in the Rights Agreement.

     The Rights  initially are represented by the  certificates for Common Stock
and will not be  exercisable or  transferable  apart from the Common Stock until
the  earlier  to occur of (i) 10 days  following  a public  announcement  that a
person or group of  affiliated  or  associated  persons  (Acquiring  Person) has
acquired, or obtained the right to acquire,  beneficial ownership of 20% or more
of the outstanding  Common Stock or (ii) 10 days following the  commencement of,
or  announcement  of an intention to make, a tender offer or exchange  offer the
consummation  of which would result in the  beneficial  ownership by a person or
group of 30% or more of such outstanding Common Stock (the earlier of such dates
being called the "Distribution Date").

                                       11
<PAGE>

     In the event that the  Company is  acquired  in a merger or other  business
combination  transaction  or 50% or more of its  consolidated  assets or earning
power are sold,  proper  provision  will be made so that each  holder of a Right
will thereafter have the right to receive, upon the exercise thereof at the then
current   exercise  price  of  the  Right   multiplied  by  the  number  of  one
one-hundredths of a Preference Share for which a Right is then  exercisable,  in
accordance  with the terms of the  Rights  Agreement,  such  number of shares of
common stock of the acquiring  company as shall be equal to the result  obtained
by (i) multiplying the then current exercise price of the Right by the number of
one  one-hundredths of a Preference Share for which a Right is then exercisable,
and (ii) dividing that product by 50% of the then current per share market price
of the common stock of the acquiring company on the date of consummation of such
merger or other business combination.

     In the event that any Person becomes an Acquiring Person,  proper provision
shall be made so that each  holder of a Right,  other than  Rights  beneficially
owned by the Acquiring  Person (which will thereafter be void),  will thereafter
have the right to receive  upon  exercise  thereof at a price  equal to the then
current   exercise  price  of  the  Right   multiplied  by  the  number  of  one
one-hundredths of a Preference Share for which a Right is then  exercisable,  in
accordance  with the terms of the  Rights  Agreement  and in lieu of  Preference
Shares,  such number of shares of Common  Stock of the Company as shall be equal
to the result obtained by (i) multiplying the then current exercise price of the
Right by the  number of one  one-hundredths  of a  Preference  Share for which a
Right is then  exercisable,  and (ii)  dividing  that product by 50% of the then
current per share  market price of the  Company's  Common Stock on the date such
person became an Acquiring Person.

     The Rights will first become  exercisable on the Distribution  Date (unless
sooner redeemed) and could then begin trading  separately from the Common Stock.
The Rights will expire on November 18, 1998 (Final Expiration Date),  unless the
Final  Expiration Date is extended or unless the Rights are earlier  redeemed by
the Company, in each case as described below.

     At any time prior to the time any person becomes an Acquiring  Person,  the
Board of  Directors  of the Company  may redeem the Rights in whole,  but not in
part, at a price of $.01333 per Right (Redemption  Price). No redemption will be
permitted  after the time any person  becomes an Acquiring  Person.  Immediately
upon any  redemption  of the  Rights,  the right to  exercise  the  Rights  will
terminate  and the only right of the  holders of Rights  will be to receive  the
Redemption Price.

     The terms of the Rights may be  amended  by the Board of  Directors  of the
Company without the consent of the holders of the Rights, including an amendment
to extend the Final Expiration Date, and, provided there is no Acquiring Person,
to extend the period  during which the Rights may be redeemed,  except that from
and after such time as any person becomes an Acquiring  Person no such amendment
may adversely affect the interests of the holders of the Rights.

     Until a Right is  exercised,  the  holder  thereof,  as such,  will have no
rights as a stockholder of the Company, including, without limitation, the right
to vote or to receive dividends.

     The Purchase  Price  payable and the number of  Preference  Shares or other
securities  or  property  issuable  upon  exercise  of the Rights are subject to
adjustment  from time to time to  prevent  dilution  (i) in the event of a stock
dividend  on,  or  a  subdivision,   combination  or  reclassification  of,  the
Preference  Shares,  (ii) upon the grant to holders of the Preference  Shares of
certain rights or warrants to subscribe for or purchase  Preference  Shares at a
price, or securities convertible into Preference Shares with a conversion price,
less than the then current market price of the  Preference  Shares or (iii) upon
the   distribution  to  holders  of  the  Preference   Shares  of  evidences  of
indebtedness or assets  (excluding  regular  periodic cash dividends paid out of
earnings or retained earnings or dividends  payable in Preference  Shares) or of
subscription rights or warrants (other than those referred to above).

     The number of outstanding  Rights and the number of one one-hundredths of a
Preference  Share  issuable  upon  exercise  of each  Right are also  subject to
adjustment in the event of a stock split of the Common Stock or a stock dividend
on the Common Stock payable in Common Stock or subdivisions,  consolidations  or
combinations  of the Common  Stock  occurring,  in any such  case,  prior to the
Distribution Date.

     Preference  Shares  purchasable  upon  exercise  of the Rights  will not be
redeemable.  Each  Preference  Share will be entitled to a minimum  preferential
quarterly  dividend  payment equal to the greater of (a) $1 per share or (b) 150
times the aggregate dividend declared per share of Common Stock. In the event of
liquidation,  the  holders  of the  Preference  Shares  will  be  entitled  to a
preferential liquidation payment of $100 per share, provided that holders of the
Preference Shares will be entitled to an aggregate amount per share equal to 150
times the aggregate  amount to be distributed per share to the holders of shares
of Common Stock.  Each Preference  Share will have no vote,  except as otherwise
provided  for  by  law  or  as  set  forth  in  the  Company's   Certificate  of

                                       12
<PAGE>

Incorporation, as amended. Finally, in the event of any merger, consolidation or
other transaction in which shares of Common Stock are exchanged, each Preference
Share will be  entitled to receive  150 times the amount  received  per share of
Common Stock. These rights are protected by customary antidilution provisions.

     Because of the nature of the Preference  Shares'  dividend and  liquidation
rights,  the value of the number of one  one-hundredths  of a  Preference  Share
purchasable  upon  exercise of each Right  should  approximate  the value of one
share of Common Stock.

     With  certain  exceptions,  no  adjustment  in the  Purchase  Price will be
required until  cumulative  adjustments  require an adjustment of at least 1% in
such Purchase Price. No fractional  Preference Shares will be issued (other than
fractions  which are  integral  multiples of one  one-hundredth  of a Preference
Share,  which may, at the  election of the Company,  be evidenced by  depositary
receipts) and in lieu  thereof,  an adjustment in cash will be made based on the
market price of the Preference  Shares on the last trading day prior to the date
of exercise.

     One Right was  distributed to stockholders of the Company for each share of
Common  Stock  owned  of  record  by  them  on  November  18,  1988.  Until  the
Distribution  Date,  the Company  will issue one Right with each share of Common
Stock that shall become outstanding so that all shares of Common Stock will have
attached Rights.

     The  Rights  have  certain  anti-takeover  effects.  The  Rights  may cause
substantial  dilution to a person or group that  attempts to acquire the Company
on terms not approved by the Board of Directors of the Company,  except pursuant
to an offer  conditioned on a substantial  number of Rights being acquired.  The
Rights  should  not  interfere  with any  merger or other  business  combination
approved by the Board of Directors  prior to the time that any person becomes an
Acquiring  Person,  since  until  such time the Rights  may be  redeemed  by the
Company at $.01333 per Right.

                           EXPERTS AND LEGAL OPINIONS

     The  consolidated  financial  statements  incorporated by reference in this
Prospectus and elsewhere in the  Registration  Statement,  to the extent and for
the periods indicated in their report, have been audited by Arthur Andersen LLP,
independent  public  accountants,  and are  incorporated by reference  herein in
reliance upon the authority of said firm as experts in giving said report.

     The information  set forth in the estimates,  dated January 9 and 23, 1996,
of Ralph E.  Davis  Associates,  Inc.  concerning  certain  natural  gas and oil
reserves,  appearing in the  Company's  Annual  Report on Form 10-K for the year
ended  December  31,  1995,  have been  reviewed  and verified by Ralph E. Davis
Associates,  Inc.  and  have  been  incorporated  herein  in  reliance  upon the
authority of said firm as experts.

     The  information  set  forth in the  report,  dated  May 9,  1994,  of Weir
International  Mining  Consultants  relating to lignite  coal  reserves of Knife
River Coal Mining Company  appearing in the Company's Annual Report on Form l0-K
for the year ended  December  31, 1995,  has been  reviewed and verified by Weir
International  Mining  Consultants and has been incorporated  herein in reliance
upon the authority of said firm as experts.

     The validity of the Common Stock and Rights to be issued under the Plan has
been passed upon for the Company by Reid & Priest LLP, New York, New York and by
Lester H. Loble, II, Esq., General Counsel for the Company.

                                       13

<PAGE>
================================================================================

   NO  PERSON  HAS  BEEN  AUTHORIZED  TO GIVE  ANY  INFORMATION  OR TO MAKE  ANY
REPRESENTATIONS,  OTHER THAN THOSE CONTAINED IN THIS  PROSPECTUS,  IN CONNECTION
WITH  THE  OFFERING  MADE  BY  THIS  PROSPECTUS,  AND IF  GIVEN  OR  MADE,  SUCH
INFORMATION OR REPRESENTATIONS MUST NOT BE RELIED UPON. THIS PROSPECTUS DOES NOT
CONSTITUTE AN OFFERING OF ANY  SECURITIES  OTHER THAN THOSE TO WHICH IT RELATES,
OR AN  OFFERING  OF THOSE  SECURITIES  TO WHICH IT  RELATES TO ANY PERSON IN ANY
JURISDICTION  IN WHICH SUCH  OFFERING  MAY NOT  LAWFULLY  BE MADE.  NEITHER  THE
DELIVERY  OF THIS  PROSPECTUS  NOR ANY SALE  MADE  HEREUNDER  SHALL,  UNDER  ANY
CIRCUMSTANCES,  CREATE  ANY  IMPLICATION  THAT  THERE  HAS BEEN NO CHANGE IN THE
AFFAIRS OF THE COMPANY SINCE THE DATE HEREOF.

                                   ----------

                                TABLE OF CONTENTS

                                                            PAGE
                                                            ----
        Available Information............................     2
        Incorporation of Certain Documents
          by Reference...................................     2
        The Company......................................     2
        Description of the Plan..........................     3
          Purpose........................................     3
          Advantages and Disadvantages...................     3
          Administration.................................     3
          Participation..................................     4
          Purchases......................................     5
          Optional Cash Payments.........................     6
          Reports to Participants........................     7
          Dividends......................................     7
          Certificates for Shares........................     7
          Withdrawal.....................................     7
          Sale of Shares ................................     8
          Other Information..............................     8
        Use of Proceeds..................................    10
        Description of Common Stock......................    10
        Experts and Legal Opinions.......................    13

================================================================================

                                  MDU RESOURCES
                                   GROUP, INC.

                                3,273,273 SHARES

                                  COMMON STOCK

                                OFFERED PURSUANT
                                     TO ITS

                               AUTOMATIC DIVIDEND
                                REINVESTMENT AND
                                 STOCK PURCHASE
                                      PLAN

                                   ----------
                                   PROSPECTUS
                                   ----------



                                     , 1996

================================================================================
<PAGE>

                                     PART II

                     INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 14.  OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION

          S.E.C. Filing Fee..........................     $ 21,663
          Listing Fees ..............................       14,250
          Printing Expenses*.........................       14,000
          Accounting Fees and Expenses*..............        5,000
          Transfer Agent Fees*.......................       62,000
          Legal Fees and Expenses*...................       40,000
          Marketing Fees and Expenses*...............       28,000
          Miscellaneous*.............................       15,087
                                                          --------
                                                          $200,000
                                                          ========
          ----------
          * Estimated.

ITEM 15.  INDEMNIFICATION OF DIRECTORS AND OFFICERS

     The registrant's By-Laws include the following provision:

SECTION 7.07  INDEMNIFICATION OF OFFICERS, DIRECTORS,
              EMPLOYEES, AND AGENTS; INSURANCE.

     (a) The Corporation  shall indemnify any person who was or is a party or is
threatened  to be made a party to any  threatened  pending or completed  action,
suit or proceeding,  whether civil,  criminal,  administrative  or investigative
(other  than an action by or in the right of the  Corporation)  by reason of the
fact  that  he  is or  was  a  director,  officer,  employee  or  agent  of  the
Corporation,  or is or was  serving  at the  request  of  the  Corporation  as a
director, officer, employee or agent of another corporation,  partnership, joint
venture,  trust or other  enterprise,  against  expenses  (including  attorneys'
fees),  judgments,  fines and amounts paid in settlement actually and reasonably
incurred by him in connection  with such action,  suit or proceeding if he acted
in good faith and in a manner he reasonably  believed to be in or not opposed to
the best interests of the Corporation,  and, with respect to any criminal action
or proceeding,  had no reasonable cause to believe his conduct was unlawful. The
termination of any action,  suit or proceeding by judgment,  order,  settlement,
conviction,  or upon a plea of nolo contendere or its equivalent,  shall not, of
itself,  create a presumption that the person did not act in good faith and in a
manner which he reasonably believed to be in or not opposed to the best interest
of the Corporation,  and, with respect to any criminal action or proceeding, had
reasonable cause to believe that his conduct was unlawful.

     (b) The Corporation  shall indemnify any person who was or is a party or is
threatened to be made a party to any threatened,  pending or completed action or
suit by or in the right of the Corporation to procure a judgment in its favor by
reason of the fact that he is or was a director,  officer,  employee or agent of
the  Corporation,  or is or was serving at the request of the  Corporation  as a
director, officer, employee or agent of another corporation,  partnership, joint
venture,  trust or other enterprise against expenses (including attorneys' fees)
actually  and  reasonably  incurred  by him in  connection  with the  defense or
settlement  of such  action or suit if he acted in good faith and in a manner he
reasonably  believed  to be in or not  opposed  to  the  best  interests  of the
Corporation and except that no  indemnification  shall be made in respect of any
claim,  issue or matter as to which such person  shall have been  adjudged to be
liable  to the  Corporation,  unless  and only to the  extent  that the Court of
Chancery or the court in which such action or suit was brought,  shall determine
upon application that,  despite the adjudication of liability but in view of all
the circumstances of the case, such person is fairly and reasonably  entitled to
indemnity  for such  expenses  which the Court of  Chancery  or such other court
shall deem proper.

     (c)  To the  extent  that a  director,  officer,  employee  or  agent  of a
corporation  has been  successful  on the merits or  otherwise in defense of any
action, suit or proceeding referred to in subsections (a) and (b), or in defense
of any claim, issue or matter therein,  he shall be indemnified against expenses
(including   attorneys'  fees)  actually  and  reasonably  incurred  by  him  in
connection therewith.

                                      II-1
<PAGE>

     (d) Any  indemnification  under the  foregoing  provisions  of this Section
(unless ordered by a court) shall be made by the Corporation  only as authorized
in the specific case upon a determination that  indemnification of the director,
officer, employee or agent is proper in the circumstances because he has met the
applicable  standard of conduct as set forth in subsections  (a) and (b) of this
Section.  Such  determination  shall  be  made  (i) by a  majority  vote  of the
directors who were not parties to such action,  suit or proceeding,  even though
less than a quorum, or (ii) if there are no such directors, or if such directors
so direct,  by independent  legal counsel in a written opinion,  or (iii) by the
stockholders.

     (e) Expenses (including attorneys' fees) incurred by an officer or director
in defending any civil,  criminal,  administrative or investigative action, suit
or  proceeding  shall  be  paid  by the  Corporation  in  advance  of the  final
disposition of such action, suit or proceeding upon receipt of an undertaking by
or on  behalf  of the  director  or  officer  to repay  such  amount if it shall
ultimately  be  determined  that he is not  entitled  to be  indemnified  by the
Corporation as authorized in this Section. Once the Corporation has received the
undertaking, the Corporation shall pay the officer or director within 30 days of
receipt by the Corporation of a written application from the officer or director
for the  expenses  incurred  by that  officer  or  director.  In the  event  the
Corporation fails to pay within the 30-day period,  the applicant shall have the
right to sue for recovery of the expenses  contained in the written  application
and, in addition, shall recover all attorneys' fees and expenses incurred in the
action to enforce the  application  and the rights granted in this Section 7.07.
Expenses  (including  attorneys'  fees)  incurred by other  employees and agents
shall be paid upon such terms and conditions,  if any, as the Board of Directors
deems appropriate.

     (f) The indemnification and advancement of expenses provided by, or granted
pursuant to, the other subsections of this Section shall not be deemed exclusive
of any other rights to which those seeking  indemnity or advancement of expenses
may  be  entitled  under  any  by-law,   agreement,   vote  of  stockholders  or
disinterested directors or otherwise, both as to action in his official capacity
and as to action in another capacity while holding such office.

     (g) The  Corporation  may purchase and maintain  insurance on behalf of any
person who is or was a director,  officer, employee or agent of the Corporation,
or is or was serving at the request of the  Corporation as a director,  officer,
employee or agent of another corporation,  partnership,  joint venture, trust or
other enterprise, against any liability asserted against him and incurred by him
in any such capacity,  or arising out of his status as such,  whether or not the
Corporation  would have the power to indemnify him against such liability  under
the provisions of this Section.

     (h) For the  purposes  of this  Section,  references  to "the  Corporation"
include all constituent  corporations  absorbed in a consolidation or merger, as
well as the resulting or surviving corporation, so that any person who is or was
a director,  officer,  employee or agent of such a constituent corporation or is
or was serving at the  request of such  constituent  corporation  as a director,
officer, employee or agent of another corporation,  partnership,  joint venture,
trust or other enterprise, shall stand in the same position under the provisions
of this  Section with respect to the  resulting or surviving  corporation  as he
would if he had  served  the  resulting  or  surviving  corporation  in the same
capacity.

     (i) For purposes of this Section,  references to "other  enterprises" shall
include employee  benefit plans;  references to "fines" shall include any excise
taxes  assessed on a person  with  respect to any  employee  benefit  plan;  and
references  to  "serving at the request of the  Corporation"  shall  include any
service as a  director,  officer,  employee  or agent of the  Corporation  which
imposes duties on, or involves services by, such director,  officer, employee or
agent  with  respect  to  an  employee   benefit  plan,  its   participants   or
beneficiaries;  and a  person  who  acted  in  good  faith  and in a  manner  he
reasonably  believed to be in the interest of the participants and beneficiaries
of an  employee  benefit  plan  shall be deemed to have  acted in a manner  "not
opposed  to the  best  interests  of the  Corporation"  as  referred  to in this
Section.

     (j) The indemnification and advancement of expenses provided by, or granted
pursuant to, this Section shall,  unless  otherwise  provided when authorized or
ratified,  continue  as to a person  who has ceased to be a  director,  officer,
employee  or agent and shall inure to the  benefit of the heirs,  executors  and
administrators of such a person.

     Section  145 of the  General  Corporation  Law of  the  State  of  Delaware
provides  for  indemnification  of the  Company's  directors  and  officers in a
variety of circumstances, which may include liabilities under the Securities Act
of 1933.

     The Company  maintains  liability  insurance  protecting it, as well as its
directors  and  officers,  against  liability by reason of their being or having
been directors or officers.  The premium,  payable solely by the Company, is not
separately allocable to the sale of the securities registered hereby.

                                      II-2
<PAGE>

ITEM 16. EXHIBITS

   EXHIBIT NO.                                    DESCRIPTION OF EXHIBIT
   ----------                                     ----------------------
       *3(a)      --Composite  Certificate of Incorporation  of the Company,  as
                    amended to date (filed as Exhibit 3(a) to Form 10-K for
                    the year ended December 31, 1994, in File No. 1-3480).

       *3(b)      --By-laws of  the  Company,  as  amended  to  date  (filed  as
                    Exhibit  3(b) to Form 10-K for the year ended  December  31,
                    1994, in File No. 1-3480).

       *4(a)      --Indenture   of  Mortgage,  dated  as  of  May  1,  1939,  as
                    restated in the Forty-fifth Supplemental Indenture, dated as
                    of April 21,  1992,  between  the  Company  and The New York
                    Trust  Company  (The Bank of New York,  successor  Corporate
                    Trustee)  and  A.C.  Downing  (W.T.  Cunningham,   successor
                    Co-Trustee)  filed  as   Exhibit  4(a)  in  Registration No.
                    33-66682).

       *4(b)      --The    Forty-sixth,    Forty-seventh    and     Forty-eighth
                    Supplements to the Indenture of Mortgage between the Company
                    and  The New  York  Trust  Company  (The  Bank of New  York,
                    successor   Corporate   Trustee)  and  A.C.   Downing  (W.T.
                    Cunningham,  successor Co-Trustee), (filed as Exhibits 4(e),
                    4(f) and 4(g), respectively, in Registration No. 33-53896).

       *4(c)      --Rights Agreement,  dated as of November 3, 1988, between the
                    Company  and  Norwest  Bank  Minnesota,  N.A., Rights Agent,
                    (filed as Exhibit 4(c) in Registration No. 33-66682).

        5(a)      --Opinion of Lester H. Loble, II, Esq., General Counsel to the
                    Company.

        5(b) and 8--Opinion of Reid & Priest LLP, counsel to the Company.

       23(a)      --Consent of Arthur Andersen LLP.

       23(b)      --Consent of Ralph E. Davis Associates, Inc.

       23(c)      --Consent of Weir International Mining Consultants.

       23(d)      --The  consents of Lester H. Loble, II, Esq. and Reid & Priest
                    LLP are contained in their  opinions  filed as Exhibit 5(a),
                    and Exhibit 5(b) and  8, respectively, to  this Registration
                    Statement.

       24         --The Power of Attorney is on  page II-5 of this  Registration
                    Statement.

- ----------
*Incorporated herein by reference as indicated.


ITEM 17.  UNDERTAKINGS

  The undersigned registrant hereby undertakes:

          (1) To file,  during  any  period  in which  offers or sales are being
     made, a  post-effective  amendment to this  registration  statement  (i) to
     include any prospectus  required by section 10(a) (3) of the Securities Act
     of 1933;  (ii) to reflect  in the  prospectus  any facts or events  arising
     after the effective date of the registration  statement (or the most recent
     post-effective amendment thereof) which,  individually or in the aggregate,
     represent  a  fundamental  change  in  the  information  set  forth  in the
     registration  statement;  notwithstanding  the  foregoing,  any increase or
     decrease  in volume of  securities  offered (if the total  dollar  value of
     securities  offered  would not exceed  that which was  registered)  and any
     deviation from the low or high end of the estimated  maximum offering range
     may be  reflected  in the form of  prospectus  filed  with  the  Commission
     pursuant  to Rule  424(b) if, in the  aggregate,  the changes in volume and
     price represent no more than a 20% change in the maximum aggregate offering
     price set  forth in the  "Calculation  of  Registration  Fee"  table in the
     effective registration statement; (iii) to include any material information
     with respect to the plan of  distribution  not previously  disclosed in the
     registration  statement or any material  change to such  information in the
     registration  statement;  provided,  however,  that the registrant need not
     file a post-effective  amendment to include the information  required to be
     included by  subsection  (i) or (ii) if the  information  is  contained  in
     periodic  reports  filed  with  or  furnished  to  the  Commission  by  the
     registrant  pursuant  to  section  13 or  section  15(d) of the  Securities
     Exchange Act of 1934 that are incorporated by reference in the registration
     statement;

          (2) That,  for the  purpose of  determining  any  liability  under the
     Securities Act of 1933, each such post-effective  amendment shall be deemed
     to be a new  registration  statement  relating  to the  securities  offered
     therein,  and the offering of such  securities at that time shall be deemed
     to be the initial bona fide offering thereof.

          (3) To remove from registration by means of a post-effective amendment
     any  of  the  securities  being  registered  which  remain  unsold  at  the
     termination of the offering; and

                                      II-3
<PAGE>

          (4)  That,  for  purposes  of  determining  any  liability  under  the
     Securities  Act of 1933,  each  filing of the  registrant's  annual  report
     pursuant to section 13(a) or section 15(d) of the  Securities  Exchange Act
     of 1934 that is  incorporated by reference in this  registration  statement
     shall  be  deemed  to be a  new  registration  statement  relating  to  the
     securities offered herein, and the offering of such securities at that time
     shall be deemed to be the initial bona fide  offering  thereof.

     Insofar as indemnification for liabilities arising under the Securities Act
of 1933 may be permitted to directors,  officers and controlling  persons of the
registrant pursuant to the foregoing  provisions,  or otherwise,  the registrant
has been advised that in the opinion of the Securities  and Exchange  Commission
such  indemnification  is against  public policy as expressed in the Act and is,
therefore,  unenforceable. In the event that a claim for indemnification against
such liabilities  (other than the payment by the registrant of expenses incurred
or paid by a director,  officer or  controlling  person of the registrant in the
successful  defense of any  action,  suit or  proceeding)  is  asserted  by such
director,  officer or controlling person in connection with the securities being
registered, the registrant will, unless in the opinion of its counsel the matter
has been  settled by  controlling  precedent,  submit to a court of  appropriate
jurisdiction the question whether such  indemnification  by it is against public
policy as expressed in the Act and will be governed by the final adjudication of
such issue.

                                      II-4
<PAGE>

                                POWER OF ATTORNEY

     Each director  and/or officer of the  registrant  whose  signature  appears
below  hereby  appoints  the  agents  for  service  named  in this  registration
statement,  and each of them severally,  as his  attorney-in-fact to sign in his
name and behalf,  in any and all capacities  stated below,  and to file with the
Commission, any and all amendments, including post-effective amendments, to this
registration statement,  and the registrant hereby also appoints each such agent
for service as its attorney-in-fact with the authority to sign and file any such
amendments in its name and behalf.

                                      II-5
<PAGE>

                                   SIGNATURES

     Pursuant to the  requirements of the Securities Act of 1933, the registrant
certifies  that it has  reasonable  grounds to believe  that it meets all of the
requirements  for  filing  on Form S-3 and has  duly  caused  this  registration
statement  to be  signed  on its  behalf  by  the  undersigned,  thereunto  duly
authorized to sign, in the City of Bismarck,  and the State of North Dakota,  on
the 14th day of June, 1996.

                                     MDU RESOURCES GROUP, INC.

                                     By:        /s/ Harold J. Mellen, Jr.
                                        ----------------------------------------
                                                  Harold J. Mellen, Jr.
                                         (President and Chief Executive Officer)

     Pursuant  to  the   requirements  of  the  Securities  Act  of  1933,  this
registration  statement  has  been  signed  by  the  following  persons  in  the
capacities and on the dates indicated.

            SIGNATURE                         TITLE                   DATE
            --------                          -----                   ----

   /s/ Harold J. Mellen, Jr.             Chief Executive           June 14, 1996
- -------------------------------       Officer and Director
      Harold J. Mellen, Jr.
         (President and
    Chief Executive Officer)

       /s/ Douglas C. Kane               Chief Operating           June 14, 1996
- -------------------------------       Officer and Director
         Douglas C. Kane
    (Executive Vice President
  and Chief Operating Officer)

     /s/ Warren L. Robinson               Chief Financial          June 14, 1996
- -------------------------------               Officer
       Warren L. Robinson
 (Vice President, Treasurer and
    Chief Financial Officer)

       /s/ Vernon A. Raile            Chief Accounting Officer     June 14, 1996
- -------------------------------
         Vernon A. Raile
 (Vice President, Controller and
    Chief Accounting Officer)

      /s/ John A. Schuchart                   Director             June 14, 1996
- -------------------------------
        John A. Schuchart
     (Chairman of the Board)

      /s/ San W. Orr, Jr.                     Director             June 14, 1996
- -------------------------------
         San W. Orr, Jr.
  (Vice Chairman of the Board)

       /s/ Thomas Everist                     Director             June 14, 1996
- -------------------------------
         Thomas Everist

       /s/ Richard L. Muus                    Director             June 14, 1996
- -------------------------------
         Richard L. Muus

       /s/ Robert L. Nance                    Director             June 14, 1996
- -------------------------------
         Robert L. Nance

        /s/ John L. Olson                     Director             June 14, 1996
- -------------------------------
          John L. Olson

       /s/ Homer A. Scott                     Director             June 14, 1996
- -------------------------------
         Homer A. Scott

      /s/ Joseph T. Simmons                   Director             June 14, 1996
- -------------------------------
        Joseph T. Simmons

/s/ Sister Thomas Welder, O.S.B.              Director             June 14, 1996
- -------------------------------
  Sister Thomas Welder, O.S.B.

                                      II-6
<PAGE>


                                 EXHIBIT INDEX

   EXHIBIT NO.                                    DESCRIPTION OF EXHIBIT
   ----------                                     ----------------------
       *3(a)      --Composite  Certificate of Incorporation  of the Company,  as
                    amended to date (filed as Exhibit 3(a) to Form 10-K for
                    the year ended December 31, 1994, in File No. 1-3480).

       *3(b)      --By-laws of  the  Company,  as  amended  to  date  (filed  as
                    Exhibit  3(b) to Form 10-K for the year ended  December  31,
                    1994, in File No. 1-3480).

       *4(a)      --Indenture   of  Mortgage,  dated  as  of  May  1,  1939,  as
                    restated in the Forty-fifth Supplemental Indenture, dated as
                    of April 21,  1992,  between  the  Company  and The New York
                    Trust  Company  (The Bank of New York,  successor  Corporate
                    Trustee)  and  A.C.  Downing  (W.T.  Cunningham,   successor
                    Co-Trustee)  filed  as   Exhibit  4(a)  in  Registration No.
                    33-66682).

       *4(b)      --The    Forty-sixth,    Forty-seventh    and     Forty-eighth
                    Supplements to the Indenture of Mortgage between the Company
                    and  The New  York  Trust  Company  (The  Bank of New  York,
                    successor   Corporate   Trustee)  and  A.C.   Downing  (W.T.
                    Cunningham,  successor Co-Trustee), (filed as Exhibits 4(e),
                    4(f) and 4(g), respectively, in Registration No. 33-53896).

       *4(c)      --Rights Agreement,  dated as of November 3, 1988, between the
                    Company  and  Norwest  Bank  Minnesota,  N.A., Rights Agent,
                    (filed as Exhibit 4(c) in Registration No. 33-66682).

        5(a)      --Opinion of Lester H. Loble, II, Esq., General Counsel to the
                    Company.

        5(b) and 8--Opinion of Reid & Priest LLP, counsel to the Company.

       23(a)      --Consent of Arthur Andersen LLP.

       23(b)      --Consent of Ralph E. Davis Associates, Inc.

       23(c)      --Consent of Weir International Mining Consultants.

       23(d)      --The  consents of Lester H. Loble, II, Esq. and Reid & Priest
                    LLP are contained in their  opinions  filed as Exhibit 5(a),
                    and Exhibit 5(b) and  8, respectively, to  this Registration
                    Statement.

       24         --The Power of Attorney is on  page II-5 of this  Registration
                    Statement.

- ----------
*Incorporated herein by reference as indicated.




                                                                    EXHIBIT 5(A)

                                             June 14, 1996

MDU Resources Group, Inc.
400 North Fourth Street
Bismarck, ND  58501

Ladies and Gentlemen:

         With reference to the Registration Statement on Form S-3 to be filed on
or about the date hereof with the  Securities  and  Exchange  Commission  by MDU
Resources  Group,  Inc. (the  "Company")  under the  Securities  Act of 1933, as
amended  (the  "Act"),  and  pursuant to which the  Company  intends to register
3,000,000  shares of its Common  Stock,  par value $3.33 (the  "Stock")  and the
Preference  Share Purchase Rights attached  thereto (the "Rights") for offer and
sale in connection with the Company's Automatic Dividend  Reinvestment and Stock
Purchase Plan (the "Plan"), it is my opinion that:

     1. The Company is a corporation  validly  organized and existing  under the
laws of the state of Delaware and is duly  qualified to do business as a foreign
corporation in the states of Montana, North Dakota, South Dakota and Wyoming.

     2.  When

         (a) appropriate   authorizations   by  the  Federal  Energy  Regulatory
             Commission,  the Montana Public  Service  Commission and the Public
             Service Commission of Wyoming with respect to the issuance and sale
             of the Stock shall have been granted;

         (b) the  Company's  said  Registration Statement on Form S-3 shall have
             become effective;

         (c) the  Company's  Board of Directors or a duly  authorized  committee
             thereof  shall have  approved the issuance and sale of the Stock by
             the Company; and

         (d) the Stock  shall  have  been  duly  issued  and  delivered  for the
             consideration set forth in the aforesaid Registration Statement and
             in accordance  with the actions  hereinabove  mentioned,  

the Stock will be  validly issued,  fully paid  and non-assessable.

     3. The Rights,  when issued as contemplated by the Registration  Statement,
will be validly issued.

     4. The Stock to be  purchased on the open market is validly  issued,  fully
paid and non-assessable.

     5. The Rights  attached to the Stock to be purchased on the open market are
validly issued and outstanding.

     I am a member of the North  Dakota and Montana  Bars and do not hold myself
out as an  expert  on the  laws of any  other  state.  Except  as set  forth  in
paragraph 2(a) above, my opinions  expressed above are limited to the law of the
states of North Dakota and Montana,  the General Corporation Law of the state of
Delaware, and the Federal laws of the United States.

     I  hereby  consent  to  the  use  of  this  opinion  as an  exhibit  to the
Registration Statement and to the use of my name therein.

                                            Very truly yours,
                                           
                                            /s/ Lester H. Loble, II
                                           
                                            Lester H. Loble, II
                                            General Counsel
                                            and Secretary
                                       
LHL/lml




                                                              EXHIBIT 5(B) AND 8

                                             June 14, 1996

MDU Resources Group, Inc.
400 North Fourth Street
Bismarck, North Dakota  58501

Ladies and Gentlemen:

     With reference to the Registration  Statement on Form S-3 to be filed on or
about  the date  hereof  with the  Securities  and  Exchange  Commission  by MDU
Resources  Group,  Inc. (the  "Company")  under the  Securities  Act of 1933, as
amended  (the  "Act"),  and  pursuant to which the  Company  intends to register
3,000,000  shares of its Common  Stock,  par value $3.33 (the  "Stock")  and the
Preference  Share Purchase Rights attached  thereto (the "Rights") for offer and
sale in connection with its Automatic  Dividend  Reinvestment and Stock Purchase
Plan (the "Plan"), we are of the opinion that:

     (1) The Company is a corporation  validly  organized and existing under the
laws of the State of Delaware.

     (2) When

         (a) appropriate   authorizations   by  the  Federal  Energy  Regulatory
             Commission,  the Montana Public  Service  Commission and the Public
             Service Commission of Wyoming with respect to the issuance and sale
             of the Stock shall have been granted;

         (b) the Company's  said  Registration  Statement on Form S-3 shall have
             become effective;

         (c) the  Company's  Board of Directors or a duly  authorized  committee
             thereof  shall have  approved the issuance and sale of the Stock by
             the Company; and

         (d) the Stock  shall  have  been  duly  issued  and  delivered  for the
             consideration set forth in the aforesaid Registration Statement and
             in accordance  with the actions  hereinabove  mentioned,  

the Stock will be  validly issued,  fully paid  and non-assessable.

     (3) The Rights, when issued as contemplated by the Registration  Statement,
will be validly issued.

     (4) The Stock to be purchased in the open market is validly  issued,  fully
paid and non-assessable,  and the Rights attached thereto are validly issued and
outstanding.

     (5) The statements  made in the  Registration  Statement under Question 31,
relating  to  Federal  income tax  consequences  of  participation  in the Plan,
constitute an accurate  description  of the Federal income tax  consequences  to
participants in the Plan.

     We are members of the New York Bar and do not hold ourselves out as experts
on the laws of any other state. Our opinions  expressed above are limited to the
law of the  State of New  York,  the  General  Corporation  Law of the  State of
Delaware  and the  Federal  laws of the  United  States.  As to all  matters  of
Montana,  North  Dakota,  South  Dakota and Wyoming law, we have relied upon the
opinion to you of even date  herewith of Lester H. Loble,  II,  Esq.,  Bismarck,
North Dakota, the Company's General Counsel.

     We  hereby  consent  to the  use  of  this  opinion  as an  exhibit  to the
Registration Statement and to the use of our name therein.

                                             Very truly yours,

                                             /s/ Reid & Priest LLP

                                             REID & PRIEST LLP





                                                                   EXHIBIT 23(A)

                    CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

     As independent public  accountants,  we hereby consent to the incorporation
by reference in this registration statement of our report dated January 24, 1996
incorporated by reference in MDU Resources Group,  Inc.'s Form 10-K for the year
ended  December  31,  1995 and to all  references  to our Firm  included in this
registration statement.

                               /s/ Arthur Andersen LLP
                                   ARTHUR ANDERSEN LLP


Minneapolis, Minnesota
  June 14, 1996





                                                                   EXHIBIT 23(B)

                               CONSENT OF ENGINEER

     We hereby consent to the  incorporation  by reference in this  Registration
Statement on Form S-3 and related  Prospectus of our estimates,  dated January 9
and 23, 1996,  which appear in the MDU Resources  Group,  Inc.  Annual Report on
Form 10-K for the year ended  December 31, 1995,  and to all  references  to our
firm included in this Registration Statement.

                                                 RALPH E. DAVIS ASSOCIATES, INC.
Houston, Texas                                   /s/ Joseph Mustacchia Jr.
June 14, 1996                                    Executive Vice-President



                                                                   EXHIBIT 23(C)

                               CONSENT OF ENGINEER

     We hereby consent to the  incorporation  by reference in this  Registration
Statement on Form S-3 and related  Prospectus of our report,  dated May 9, 1994,
which appear in the MDU Resources Group, Inc. Annual Report on Form 10-K for the
year ended December 31, 1995, and to all references to our firm included in this
Registration Statement.

                                           WEIR INTERNATIONAL MINING CONSULTANTS

Des Plaines, Illinois                      /s/ Kenneth J. Ginnard
June 14, 1996




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