ZEIGLER COAL HOLDING CO
SC 14D1, 1998-08-05
BITUMINOUS COAL & LIGNITE MINING
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<PAGE>
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- --------------------------------------------------------------------------------
 
                       SECURITIES AND EXCHANGE COMMISSION
 
                             WASHINGTON, D.C. 20549
                            ------------------------
 
                                 SCHEDULE 14D-1
                               ------------------
 
              TENDER OFFER STATEMENT PURSUANT TO SECTION 14(D)(1)
                     OF THE SECURITIES EXCHANGE ACT OF 1934
                               ------------------
 
                          ZEIGLER COAL HOLDING COMPANY
 
                           (Name of Subject Company)
                            ------------------------
 
                        ZEIGLER ACQUISITION CORPORATION
                          A WHOLLY OWNED SUBSIDIARY OF
                              AEI RESOURCES, INC.
                                    (BIDDER)
 
                          COMMON STOCK, $.01 PAR VALUE
 
                         (Title of Class of Securities)
                            ------------------------
 
                                   989286109
 
                     (CUSIP Number of Class of Securities)
                            ------------------------
 
                           DONALD P. BROWN, PRESIDENT
                          AND CHIEF EXECUTIVE OFFICER
                              AEI RESOURCES, INC.
                            1500 NORTH BIG RUN ROAD
                            ASHLAND, KENTUCKY 41102
                                 (606) 928-3433
 
                                WITH A COPY TO:
 
                               ALAN K. MACDONALD
                                JAMES A. GIESEL
                           BROWN, TODD & HEYBURN PLLC
                       400 WEST MARKET STREET, 32ND FLOOR
                        LOUISVILLE, KENTUCKY 40202-3363
                                 (502) 589-5400
 
            (NAME, ADDRESS AND TELEPHONE NUMBER OF PERSON AUTHORIZED
           TO RECEIVE NOTICES AND COMMUNICATIONS ON BEHALF OF BIDDER)
 
                           CALCULATION OF FILING FEE
 
<TABLE>
<CAPTION>
                 TRANSACTION VALUATION                                      AMOUNT OF FILING FEE
<S>                                                       <C>
                      $608,975,852                                              $121,795.17
</TABLE>
 
*   For purposes of calculating the filing fee only. This amount assumes the
    purchase of 28,222,671 shares of common stock (the "Shares") of the subject
    company at $21.25 in cash per Share and the cancellation of options to
    purchase 1,666,760 shares and stock appreciation units and payment therefor
    of the difference between the exercise price of such options and units and
    $21.25 for consideration totalling $9,244,093.
 
/ /  Check box if any part of the fee is offset as provided by Rule 0-11(a)(2)
    and identify the filing with which the offsetting fee was previously paid.
    Identify the previous filing by registration statement number, or the Form
    or Schedule and the date of its filing.
 
<TABLE>
<S>                        <C>
Amount Previously Paid:    Not Applicable.
Form or Registration
Number:                    Not Applicable.
Filing Party:              Not Applicable.
Date Filed:                Not Applicable.
</TABLE>
 
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                               PAGE 1 OF 7 PAGES
                       EXHIBIT INDEX IS LOCATED ON PAGE 7
<PAGE>
                                 SCHEDULE 14D-1
 
<TABLE>
<C>                                           <S>                   <C>
             CUSIP NO.: 989286109                                          PAGE 2 OF 7 PAGES
</TABLE>
 
<TABLE>
<C>        <S>
 
    1.     NAME OF REPORTING PERSON: Zeigler Acquisition Corporation
           S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON: None.
           NAME OF REPORTING PERSON: AEI Resources, Inc.
           S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON: 61-1325837
 
    2.                    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP:                (a) / /
                                                                                           (b) / /
 
    3.     SEC USE ONLY:
 
    4.     SOURCES OF FUNDS:
           BK
 
    5.     CHECK IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
           PURSUANT TO ITEMS 2(e) OR 2(f):                                               / /
 
    6.     CITIZENSHIP OR PLACE OF ORGANIZATION:
           Delaware (Zeigler Acquisition Corporation);
           Delaware (AEI Resources, Inc.)
 
    7.     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH
           REPORTING PERSON:
           0 Shares
 
    8.     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (7) EXCLUDES
           CERTAIN SHARES:                                                               / /
 
    9.     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (7):
           0.0%
 
   10.     TYPE OF REPORTING PERSON: CO (Zeigler Acquisition Corporation)
                                           CO (AEI Resources, Inc.)
</TABLE>
 
                                       2
<PAGE>
ITEM 1. SECURITY AND SUBJECT COMPANY.
 
    (a) The name of the subject company is Zeigler Coal Holding Company, a
corporation organized under the laws of Delaware (the "Company"), which has its
principal executive offices at 50 Jerome Lane, Fairview Heights, Illinois 62208.
Capitalized terms used in this Schedule 14D-1 and not defined herein shall have
the meanings set forth in the Offer to Purchase dated August 5, 1998 (the "Offer
to Purchase") attached hereto as Exhibit (a)(1).
 
    (b) The information set forth in the "Introduction" of the Offer to Purchase
is incorporated herein by reference.
 
    (c) The information set forth in "The Tender Offer--6. Price Range of the
Shares" of the Offer to Purchase is incorporated herein by reference.
 
ITEM 2. IDENTITY AND BACKGROUND.
 
    (a)-(d) and (g) The information set forth in "Introduction" and "The Tender
Offer--8. Certain Information Concerning Purchaser and Parent" of the Offer to
Purchase is incorporated herein by reference.
 
    (e) and (f) During the last five years, neither AEI Resources, Inc., a
Delaware corporation ("Parent"), nor Zeigler Acquisition Corporation, a Delaware
corporation ("Purchaser") and a wholly owned subsidiary of Parent, nor, to the
best of their knowledge, any of the individuals listed in "The Tender Offer--8.
Certain Information Concerning Purchaser and Parent" or in Schedule I of the
Offer to Purchase have (i) been convicted in a criminal proceeding or (ii) been
a party to a civil proceeding of a judicial or administrative body of competent
jurisdiction and, as a result of such proceeding, was or is subject to a
judgment, decree or final order enjoining future violations of, or prohibiting
activities subject to, federal or state securities laws or finding any violation
of such laws.
 
ITEM 3. PAST CONTACTS, TRANSACTIONS OR NEGOTIATIONS WITH THE SUBJECT COMPANY.
 
    (a)-(b) The information set forth in "The Tender Offer--8. Certain
Information Concerning Purchaser and Parent" and "The Tender Offer--9.
Background of the Offer" of the Offer to Purchase is incorporated herein by
reference.
 
ITEM 4. SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION.
 
    (a)-(c) The information set forth in "The Tender Offer--11. Source and
Amount of Funds" of the Offer to Purchase is incorporated herein by reference.
 
ITEM 5. PURPOSE OF THE TENDER OFFER AND PLANS OR PROPOSALS OF THE BIDDER.
 
    (a)-(g) The information set forth in "The Tender Offer--10. Purpose of the
Offer; the Merger Agreement" and "The Tender Offer--12. Certain Effects of the
Offer" of the Offer to Purchase is incorporated herein by reference.
 
ITEM 6. INTEREST IN SECURITIES OF THE SUBJECT COMPANY.
 
    (a)-(b) None.
 
                                       3
<PAGE>
ITEM 7. CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH RESPECT TO
        THE SUBJECT COMPANY'S SECURITIES.
 
    The information set forth in "The Tender Offer--8. Certain Information
Concerning Purchaser and Parent" and "The Tender Offer--10. Purpose of the
Offer; the Merger Agreement" of the Offer to Purchase is incorporated herein by
reference.
 
ITEM 8. PERSONS RETAINED, EMPLOYED OR TO BE COMPENSATED.
 
    The information set forth in "The Tender Offer--16. Fees and Expenses" of
the Offer to Purchase is incorporated herein by reference.
 
ITEM 9. FINANCIAL STATEMENTS OF CERTAIN BIDDERS.
 
    Not applicable.
 
ITEM 10. ADDITIONAL INFORMATION.
 
    (a) The information set forth in "The Tender Offer--10. Purpose of the
Offer; Merger Agreement" is incorporated herein by reference.
 
    (b)-(d) The information set forth in "The Tender Offer--15. Certain Legal
Matters; Regulatory Approvals" of the Offer to Purchase is incorporated herein
by reference.
 
    (e) None.
 
    (f) Reference is hereby made to the Offer to Purchase and the related Letter
of Transmittal, copies of which are attached hereto as Exhibits (a)(1) and
(a)(2), respectively, and which are incorporated herein in their entirety by
reference.
 
ITEM 11. MATERIAL TO BE FILED AS EXHIBITS.
 
    (a)(1) Offer to Purchase dated August 5, 1998.
 
    (a)(2) Form of Letter of Transmittal.
 
    (a)(3) Form of Letter to Shareholders dated August 5, 1998.
 
    (a)(4) Form of Letter to Brokers, Dealers, Commercial Banks, Trust Companies
           and other Nominees dated August 5, 1998.
 
    (a)(5) Form of Notice of Guaranteed Delivery.
 
    (a)(6) Guidelines for Certification of Taxpayer Identification Number on
Substitute Form W-9.
 
    (a)(7) Summary Advertisement.
 
    (a)(8) Press Release.
 
    (b)(1) Credit Facility Commitment Letter to Parent from UBS AG dated August
3, 1998.
 
    (b)(2) Bridge Loan Commitment Letter to Parent from UBS AG dated August 3,
1998.
 
    (c)(1) Agreement and Plan of Merger by and among AEI Resources, Inc.,
           Zeigler Acquisition Corporation and Zeigler Coal Holding Company,
           dated as of August 3, 1998.
 
    (c)(2) Confidentiality Agreement between Zeigler Coal Holding Company and
           Addington Enterprises, Inc. dated as of March 6, 1998.
 
    (c)(3) Support Agreement between Parent and Kinman Ltd. Partners.
 
                                       4
<PAGE>
    (c)(4) Support Agreement between Parent and Michael K. Reilly.
 
    (c)(5) Support Agreement between Parent and Chand B. Vyas.
 
    (c)(6) Support Agreement between Parent and Roland E. Casati.
 
    (d) None.
 
    (e)-(f) Not Applicable.
 
                                       5
<PAGE>
                                   SIGNATURES
 
    After due inquiry and to the best of my knowledge and belief, I certify that
the information set forth in this statement is true, complete and correct.
 
Dated: August 5, 1998.
 
<TABLE>
<S>                             <C>  <C>
                                ZEIGLER ACQUISITION CORPORATION
 
                                By:             /s/ DONALD P. BROWN
                                     -----------------------------------------
                                                  Donald P. Brown
                                                     PRESIDENT
 
                                AEI RESOURCES, INC.
 
                                By:             /s/ DONALD P. BROWN
                                     -----------------------------------------
                                                  Donald P. Brown
                                       PRESIDENT AND CHIEF EXECUTIVE OFFICER
</TABLE>
 
                                       6
<PAGE>
                                 EXHIBIT INDEX
 
<TABLE>
<CAPTION>
                                                                                                         SEQUENTIALLY
                                                                                                           NUMBERED
EXHIBIT                                            DESCRIPTION                                               PAGE
- ---------  -------------------------------------------------------------------------------------------  ---------------
<S>        <C>                                                                                          <C>
 
(a)(1)     Offer to Purchase dated August 5, 1998.....................................................
 
(a)(2)     Form of Letter of Transmittal..............................................................
 
(a)(3)     Form of Letter to Shareholders dated August 5, 1998........................................
 
(a)(4)     Form of Letter to Brokers, Dealers, Commercial Banks, Trust Companies and Other Nominees,
           dated August 5, 1998.......................................................................
 
(a)(5)     Form of Notice of Guaranteed Delivery......................................................
 
(a)(6)     Guidelines for Certification of Taxpayer Identification Number on Substitute Form W-9......
 
(a)(7)     Summary Advertisement......................................................................
 
(a)(8)     Press Release..............................................................................
 
(b)(1)     Credit Facility Commitment Letter to Parent from UBS AG dated August 3, 1998...............
 
(b)(2)     Bridge Loan Commitment Letter to Parent from UBS AG dated August 3, 1998...................
 
(c)(1)     Agreement and Plan of Merger by and among AEI Resources, Inc., Zeigler Acquisition
           Corporation and Zeigler Coal Holding Company dated as of August 3, 1998....................
 
(c)(2)     Confidentiality Agreement between Zeigler Coal Holding Company and Addington Enterprises,
           Inc. dated as of March 6, 1998.............................................................
 
(c)(3)     Support Agreement between Parent and Kinman Ltd. Partners..................................
 
(c)(4)     Support Agreement between Parent and Michael K. Reilly.....................................
 
(c)(5)     Support Agreement between Parent and Chand B. Vyas.........................................
(c)(6)     Support Agreement between Parent and Roland E. Casati......................................
 
(d)        None.......................................................................................
 
(e)-(f)    Not applicable.............................................................................
</TABLE>
 
                                       7

<PAGE>
                           OFFER TO PURCHASE FOR CASH
                     ALL OUTSTANDING SHARES OF COMMON STOCK
                                       OF
                          ZEIGLER COAL HOLDING COMPANY
                                       AT
                              $21.25 NET PER SHARE
                                       BY
                        ZEIGLER ACQUISITION CORPORATION
                          A WHOLLY OWNED SUBSIDIARY OF
                              AEI RESOURCES, INC.
 
    THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK
     CITY TIME, ON TUESDAY, SEPTEMBER 1, 1998 UNLESS THE OFFER IS EXTENDED.
 
    THE OFFER IS CONDITIONED UPON, AMONG OTHER THINGS, (1) THERE BEING VALIDLY
TENDERED AND NOT PROPERLY WITHDRAWN PRIOR TO THE EXPIRATION OF THE OFFER A
NUMBER OF SHARES OF COMMON STOCK (THE "SHARES") OF ZEIGLER COAL HOLDING COMPANY
(THE "COMPANY") WHICH CONSTITUTES AT LEAST 90% OF THE OUTSTANDING SHARES ON A
FULLY DILUTED BASIS, EXCLUDING OPTIONS TENDERED FOR CANCELLATION (THE "MINIMUM
CONDITION"), (2) ZEIGLER ACQUISITION CORPORATION ("PURCHASER") HAVING OBTAINED
FUNDS, PURSUANT TO EXISTING FINANCING COMMITMENTS DESCRIBED HEREIN OR OTHERWISE,
SUFFICIENT TO CONSUMMATE THE TRANSACTIONS CONTEMPLATED BY THE MERGER AGREEMENT,
INCLUDING THE PURCHASE OF ALL OF THE SHARES PURSUANT TO THE OFFER OR THE MERGER,
ALL PAYMENTS WITH RESPECT TO OPTIONS TO PURCHASE SHARES, AND ALL RELATED COSTS
AND EXPENSES (THE "FINANCING CONDITION"), AND (3) THE EXPIRATION OR TERMINATION
OF ANY APPLICABLE WAITING PERIOD UNDER THE HART-SCOTT-RODINO ANTITRUST
IMPROVEMENTS ACT OF 1976, AS AMENDED (THE "HSR ACT"). THE OFFER IS ALSO SUBJECT
TO OTHER TERMS AND CONDITIONS CONTAINED IN THIS OFFER TO PURCHASE. SEE
INTRODUCTION AND SECTIONS 1 AND 13.
 
    THE OFFER IS BEING MADE IN CONNECTION WITH THE AGREEMENT AND PLAN OF MERGER
DATED AS OF AUGUST 3, 1998 BY AND AMONG AEI RESOURCES, INC. ("PARENT"),
PURCHASER AND THE COMPANY, PURSUANT TO WHICH, FOLLOWING THE CONSUMMATION OF THE
OFFER, PURCHASER WILL BE MERGED WITH AND INTO THE COMPANY (THE "MERGER") AND THE
COMPANY WILL BECOME A WHOLLY OWNED SUBSIDIARY OF PARENT.
 
    CERTAIN DIRECTORS AND SHAREHOLDERS HOLDING APPROXIMATELY 33% OF THE
OUTSTANDING SHARES ON A FULLY DILUTED BASIS (BEFORE ANY OPTIONS ARE TENDERED FOR
CANCELLATION) HAVE AGREED TO TENDER THEIR SHARES IN THE OFFER. THE COMPANY'S
BOARD OF DIRECTORS UNANIMOUSLY HAS APPROVED THE OFFER AND RECOMMENDS THAT
SHAREHOLDERS OF THE COMPANY ACCEPT THE OFFER AND TENDER THEIR SHARES. THE OFFER
IS BEING EFFECTED TO FACILITATE THE MERGER. SEE "RECOMMENDATION OF THE COMPANY'S
BOARD OF DIRECTORS."
                                ----------------
 
                                   IMPORTANT
 
    Any shareholder desiring to tender all or any portion of such shareholder's
Shares should either (1) complete and sign the Letter of Transmittal (or a
facsimile thereof) in accordance with the instructions in the Letter of
Transmittal and deliver it and any other required documents to the Depositary
and either deliver the certificate(s) representing such Shares to the Depositary
along with the Letter of Transmittal or tender such Shares pursuant to the
procedure for book-entry transfer set forth in Section 3 hereof or (2) request
such shareholder's broker, dealer, commercial bank, trust company or other
nominee to effect the transaction for such shareholder. Any shareholder whose
Shares are registered in the name of a broker, dealer, commercial bank, trust
company or other nominee must contact such broker, dealer, commercial bank,
trust company or other nominee if such shareholder desires to tender such
Shares.
 
    Any shareholder who desires to tender Shares and whose certificates
representing such Shares are not immediately available, or who cannot comply
with the procedure for book-entry transfer on a timely basis, may tender such
Shares by following the procedures for guaranteed delivery set forth in Section
3.
 
    Questions and requests for assistance or additional copies of this Offer to
Purchase, the Letter of Transmittal and the Notice of Guaranteed Delivery may be
directed to Warburg Dillon Read LLC or to the Information Agent, at their
respective addresses and telephone numbers set forth on the back cover of this
Offer to Purchase. Additional copies of this Offer to Purchase, the Letter of
Transmittal and the Notice of Guaranteed Delivery may be obtained from the
Information Agent or from brokers, dealers, commercial banks or trust companies.
                                ----------------
 
                      The Dealer Manager for the Offer is:
 
                            WARBURG DILLON READ LLC
                                   ---------
 
             The date of this Offer to Purchase is August 5, 1998.
<PAGE>
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                                                                  PAGE
                                                                                                               -----------
<S>        <C>                                                                                                 <C>
INTRODUCTION.................................................................................................           1
 
RECOMMENDATION OF THE COMPANY'S BOARD OF DIRECTORS...........................................................           2
 
THE TENDER OFFER.............................................................................................           3
 
       1.  Terms of the Offer; Extension of Tender Period; Termination; Amendment............................           3
 
       2.  Acceptance for Payment and Payment for Shares.....................................................           4
 
       3.  Procedure for Tendering Shares....................................................................           5
 
       4.  Withdrawal Rights.................................................................................           7
 
       5.  Certain Federal Income Tax Consequences of the Offer and the Merger...............................           8
 
       6.  Price Range of the Shares.........................................................................           9
 
       7.  Certain Information Concerning the Company........................................................           9
 
       8.  Certain Information Concerning Purchaser and Parent...............................................          12
 
       9.  Background of the Offer...........................................................................          13
 
      10.  Purpose of the Offer; the Merger Agreement........................................................          14
 
      11.  Source and Amount of Funds........................................................................          22
 
      12.  Certain Effects of the Offer......................................................................          24
 
      13.  Certain Conditions of the Offer...................................................................          24
 
      14.  Dividends and Distributions.......................................................................          25
 
      15.  Certain Legal Matters; Regulatory Approvals.......................................................          26
 
      16.  Fees and Expenses.................................................................................          28
 
      17.  Miscellaneous.....................................................................................          29
 
Schedule I--Information Concerning the Directors and Officers
       of Parent and Purchaser...............................................................................         I-1
</TABLE>
 
                                       i
<PAGE>
To the Shareholders of Zeigler Coal Holding Company:
 
                                  INTRODUCTION
 
    Zeigler Acquisition Corporation, a Delaware corporation ("Purchaser") and a
wholly owned subsidiary of AEI Resources, Inc., a Delaware corporation
("Parent"), hereby offers to purchase all of the outstanding shares of common
stock, $.01 par value per share (the "Shares"), of Zeigler Coal Holding Company
(the "Company"), at a purchase price of $21.25 per Share (the "Offer Price"),
net to the seller in cash, in accordance with the terms and subject to the
conditions set forth in this Offer to Purchase and in the related Letter of
Transmittal (which, as amended or supplemented from time to time, collectively
constitute the "Offer").
 
    The Offer is being made in connection with an Agreement and Plan of Merger
(the "Merger Agreement") dated as of August 3, 1998, by and among Parent,
Purchaser and the Company. The Merger Agreement requires, on the terms and
subject to the conditions set forth therein, Purchaser to offer to purchase all
of the outstanding Shares of the Company pursuant to the Offer. If Shares
representing at least 90% of the outstanding Shares are validly tendered in the
Offer and purchased by Purchaser and the other conditions to the Merger are
satisfied or waived, Purchaser will merge with and into the Company, and in the
Merger any Shares not purchased in the Offer (other than shares as to which
appraisal rights are properly exercised under Delaware law) will be converted by
operation of law into the right to receive cash in the amount of $21.25 per
Share (the "Merger Consideration"). For more information concerning the terms of
the Merger Agreement, see Section 10.
 
    THE COMPANY'S BOARD OF DIRECTORS UNANIMOUSLY HAS DETERMINED THAT THE OFFER
AND THE MERGER ARE FAIR TO AND IN THE BEST INTERESTS OF THE COMPANY AND ITS
SHAREHOLDERS AND UNANIMOUSLY HAS APPROVED THE OFFER AND THE MERGER AND
RECOMMENDS THAT SHAREHOLDERS OF THE COMPANY ACCEPT THE OFFER. SEE
"RECOMMENDATION OF THE COMPANY'S BOARD OF DIRECTORS."
 
    Tendering shareholders will not be obligated to pay brokerage fees or
commissions or, except as set forth in Instruction 7 of the Letter of
Transmittal, transfer taxes on the transfer and sale of Shares pursuant to the
Offer. Purchaser will pay all fees and expenses of Warburg Dillon Read LLC,
which is acting as Dealer Manager for the Offer (in such capacity, the "Dealer
Manager"), IBJ Schroder Bank & Trust Company (the "Depositary") and MacKenzie
Partners, Inc. (the "Information Agent") incurred in connection with the Offer.
See Section 16.
 
    The Offer is being made pursuant to the Merger Agreement. The purpose of the
Offer, the Merger, and the Merger Agreement is to enable Parent to obtain
control of, and to own the entire equity interest in, the Company. On August 3,
1998, the closing market price of the Company's Shares was $15.94. The Offer
provides an opportunity for existing shareholders of the Company to sell Shares
at a premium over recent trading prices. See Section 6.
 
    THE OFFER IS CONDITIONED, AMONG OTHER THINGS, UPON SATISFACTION OF THE
FOLLOWING CONDITIONS: (1) THERE HAVING BEEN VALIDLY TENDERED AND NOT PROPERLY
WITHDRAWN ON OR PRIOR TO THE EXPIRATION DATE OF THE OFFER A NUMBER OF SHARES
WHICH CONSTITUTES AT LEAST 90% OF THE OUTSTANDING SHARES ON A FULLY DILUTED
BASIS, EXCLUDING OPTIONS TENDERED FOR CANCELLATION (THE "MINIMUM CONDITION"),
(2) PURCHASER HAVING OBTAINED FUNDS, PURSUANT TO EXISTING FINANCING COMMITMENTS
DESCRIBED HEREIN OR OTHERWISE, SUFFICIENT TO CONSUMMATE THE TRANSACTIONS
CONTEMPLATED BY THE MERGER AGREEMENT, INCLUDING THE PURCHASE OF ALL OF THE
SHARES PURSUANT TO THE OFFER OR THE MERGER, ALL PAYMENTS WITH RESPECT TO OPTIONS
TO PURCHASE SHARES, AND ALL RELATED COSTS AND EXPENSES (THE "FINANCING
CONDITION"), AND (3) THE EXPIRATION OR TERMINATION OF ANY APPLICABLE WAITING
PERIOD UNDER THE HSR ACT. THE OFFER IS SUBJECT TO OTHER TERMS AND CONDITIONS AS
DESCRIBED IN SECTIONS 1 AND 13.
 
    Subject to certain exceptions set forth below, Purchaser expressly reserves
the right to waive any one or more of the conditions to the Offer. See Sections
1 and 13.
 
    As of July 28, 1998, there were outstanding 28,222,671 Shares. As of July
28, 1998, options covering a total of 1,666,760 Shares were outstanding.
Purchaser estimates that up to approximately 25,550,412 Shares will need to be
validly tendered (and not validly withdrawn) to satisfy the Minimum Condition,
assuming that 90% of the outstanding options will be tendered for cancellation.
<PAGE>
    Certain directors and shareholders who own approximately 33% of the Shares
on a fully diluted basis before any tender of options for cancellation. See
Section 10. have agreed with the Company to tender their Shares in accordance
with the terms and conditions of the Offer.
 
    Parent estimates that approximately $1.22 billion of financing will be
required to consummate the Offer and Merger, to refinance certain obligations of
Parent and the Company, and to pay estimated financing and transaction fees and
expenses. An additional $130 million will be available under a working capital
facility. Parent plans to obtain the necessary funds under the Senior Credit
Facility and the Bridge Loan Facilities, as described below, and to use proceeds
from the sale of senior subordinated notes and discount notes to refinance the
Bridge Loan Facilities. In connection with financing arrangements for the Offer
and the Merger, the existing shareholders of Parent intend to contribute all of
the outstanding capital stock of Parent to a newly formed holding company ("New
Holdings"), such that Parent will become a wholly owned subsidiary of New
Holdings.
 
    Parent has received from UBS AG, Stamford Branch ("UBS") (i) a written
financing commitment (the "Credit Facility Commitment Letter") consisting of a
$450 million senior secured term loan facility and a $300 million senior secured
revolving credit facility and (ii) a written financing commitment ("the "Bridge
Loan Commitment Letter") consisting of a $100 million senior unsecured term loan
to New Holdings (the "New Holdings Bridge Loan") and a $500 million senior
subordinated term loan to Parent. New Holdings would contribute the proceeds of
the $100 million New Holdings Bridge Loan to Parent to acquire equity capital of
Parent.
 
    For more information concerning the financing of the Offer and the Merger
and related transactions, see Section 11.
 
                                 *  *  *  *  *
 
    Shareholders are urged to read this Offer to Purchase and the related Letter
of Transmittal carefully before deciding whether to tender their Shares.
 
               RECOMMENDATION OF THE COMPANY'S BOARD OF DIRECTORS
 
    The Company's Board of Directors unanimously has determined that the Offer
and the Merger are fair to and in the best interests of the Company and its
shareholders and unanimously has approved the Offer and the Merger and
recommends that the shareholders of the Company accept the Offer (the "Board
Recommendation"). The purpose of the Offer, the Merger, and the Merger Agreement
is to enable Parent to obtain control of, and to own the entire equity interest
in, the Company. The Offer allows shareholders to receive cash at a premium over
recent trading prices for the Company's Shares. See Sections 6 and 9.
 
    The Company's financial advisor, Credit Suisse First Boston Corporation
("CSFB"), has delivered to the Company's Board of Directors its written opinion
dated August 3, 1998 to the effect that, as of such date and based upon and
subject to certain matters stated in such opinion, the $21.25 per Share cash
consideration to be received by the holders of Shares (other than Parent and its
affiliates) pursuant to the Offer and the Merger was fair to such holders from a
financial point of view. A copy of CSFB's opinion is contained in the Company's
Solicitation/Recommendation Statement on Schedule 14D-9 (the "Company's Schedule
14D-9"), which is being distributed to the Company's shareholders. Shareholders
are urged to read the opinion in its entirety.
 
                                       2
<PAGE>
                                THE TENDER OFFER
 
1.  TERMS OF THE OFFER; EXTENSION OF TENDER PERIOD; TERMINATION; AMENDMENT
 
    Upon the terms and subject to the conditions of the Offer (including, if the
Offer is extended or amended, the terms and conditions of any such extension or
amendment), Purchaser will accept for payment and pay for all Shares validly
tendered and not properly withdrawn on or prior to the Expiration Date (as
hereinafter defined) at a price of $21.25 per Share, net to the seller in cash.
The term "Expiration Date" means 12:00 Midnight, New York City time, on Tuesday,
September 1, 1998, unless Purchaser shall have extended the period during which
the Offer is open, in which event the term "Expiration Date" shall mean the
latest time and date at which the Offer, as so extended by Purchaser, shall
expire.
 
    The Offer is conditioned upon, among other things, satisfaction of the
Minimum Condition and the Financing Condition and the expiration or termination
of any waiting period under the HSR Act. The Offer is also subject to certain
other conditions set forth in Section 13. Subject to certain exceptions set
forth below, Purchaser expressly reserves the right, in its sole discretion, to
waive, in whole or in part, any or all of the conditions of the Offer other than
the Minimum Condition, which can be waived only with the consent of the Company.
 
    Subject to the terms of the Merger Agreement, Purchaser may extend the
Offer. The Merger Agreement provides that Purchaser has the right to extend the
Offer up to an additional ten business days in order to satisfy any of the
conditions specified in Section 13 other than the Financing Condition, provided
that the failure of such conditions to be satisfied is not due to a breach of
the Merger Agreement by Parent or Purchaser, by giving oral or written notice of
such extension to the Depositary. During any such extension, all Shares
previously tendered and not properly withdrawn will remain subject to the Offer,
subject to the rights of a tendering shareholder to withdraw such shareholder's
Shares. There can be no assurance that Purchaser will exercise its right to
extend the Offer.
 
    Purchaser also expressly reserves the right, subject to applicable laws
(including applicable regulations of the Securities and Exchange Commission (the
"Commission")) at any time or from time to time, to (i) delay acceptance for
payment of or, regardless of whether such Shares were theretofore accepted for
payment, payment for any Shares in order to comply, in whole or in part, with
any applicable law, government regulation or any other condition contained in
Sections 13 and 15, (ii) terminate the Offer (whether or not any Shares have
theretofore been accepted for payment) if any of the conditions referred to in
Section 13 have not been satisfied or upon the occurrence of any of the events
specified in Section 13, (iii) waive any condition other than the Minimum
Condition, or (iv) subject to certain exceptions set forth below, amend the
Offer in any respect; in each case by giving oral or written notice of such
delay, termination, waiver or amendment to the Depositary. Purchaser
acknowledges that (i) Rule 14e-1(c) under the Exchange Act requires Purchaser to
pay the consideration offered or return the Shares tendered promptly after the
termination or withdrawal of the Offer and (ii) Purchaser may not delay
acceptance for payment of, or payment for (except as provided by clause (i) of
the preceding sentence), any Shares upon the occurrence of any of the conditions
specified in Section 13 without extending the period of time during which the
Offer is open.
 
    Without the prior written consent of the Company, Purchaser may not decrease
the Offer Price or change the form of consideration payable in the Offer,
decrease the number of Shares Purchaser seeks to purchase in the Offer, change
the conditions to the Offer set forth in Section 13, impose additional
conditions to the Offer, or amend any other term of the Offer in any manner
adverse to the holders of Shares. Purchaser may waive any condition to the Offer
other than the Minimum Condition without the consent of the Company.
 
    Any such extension, delay, termination, waiver or amendment will be followed
as promptly as practicable by public announcement thereof, and such announcement
in the case of an extension will be made no later than 9:00 a.m., New York City
time, on the next business day after the previously scheduled Expiration Date in
accordance with the public announcement requirements of
 
                                       3
<PAGE>
Rules 14d-4(c) and 14d-6(d) under the Exchange Act. Without limiting the
obligation of Purchaser under such rules or the manner in which Purchaser may
choose to make any public announcement, Purchaser currently intends to make any
such announcement by issuing a release to the Dow Jones News Service and making
any appropriate filing with the Commission.
 
    If Purchaser makes a material change in the terms of the Offer or if
Purchaser waives a material condition of the Offer, Purchaser will extend the
Offer to the extent required by Rules 14d-4(c) and 14d-6(d) under the Exchange
Act. The minimum period during which an offer must remain open following
material changes in the terms of the Offer, other than a change in price or a
change in the percentages of securities sought, will depend on the facts and
circumstances, including the materiality, of the changes. With respect to a
change in price or, subject to certain limitations, a change in the percentage
of securities sought, a minimum ten business day period from the day of such
change is generally required to allow for adequate dissemination to
shareholders. Accordingly, if prior to the Expiration Date, Purchaser decreases
the number of Shares being sought or increases or decreases the consideration
offered pursuant to the Offer and if the Offer is scheduled to expire at any
time earlier than the period ending on the tenth business day from the date of
that notice of such increase or decrease is first published, sent or given to
shareholders, the Offer will be extended at least until the expiration of such
ten business day period. Any extension of the Offer will not constitute a waiver
by Purchaser of any of the conditions set forth in Section 13.
 
2.  ACCEPTANCE FOR PAYMENT AND PAYMENT FOR SHARES
 
    Upon the terms and subject to the conditions of the Offer (including, if the
Offer is extended or amended, the terms and conditions of any such extension or
amendment), Purchaser will accept for payment and will pay for all Shares
validly tendered and not properly withdrawn on or prior to the Expiration Date
as soon as practicable after the later to occur of: (i) the Expiration Date and
(ii) the date of satisfaction or waiver of the conditions set forth in Section
13. In addition, Purchaser reserves the right, in its sole discretion and
subject to applicable law, to delay acceptance for payment of or payment for
Shares in order to comply, in whole or in part, with any applicable law,
government regulation or any other condition contained herein. See Section 13.
 
    For purposes of the Offer, Purchaser shall be deemed to have accepted for
payment and thereby purchased tendered Shares of the Company if, as and when
Purchaser gives oral or written notice to the Depositary of its acceptance of
such Shares for payment pursuant to the Offer. Payment for Shares of the Company
accepted for payment pursuant to the Offer will be made by deposit by Purchaser
of the purchase price to be paid by it with the Depositary, which Depositary
will act as agent for the tendering shareholders for the purpose of receiving
payments from Purchaser and transmitting such payments to tendering
shareholders. Any person who tenders Shares representing more than 1% of the
outstanding Shares (282,227 Shares) may receive payment of the purchase price by
wire transfer. See Instruction 11 of the Letter of Transmittal. Under no
circumstances will interest be paid by Purchaser on the consideration paid for
the Shares of the Company pursuant to the Offer, regardless of any delay in
making such payment. Purchaser will pay all stock transfer taxes, if any,
payable on the transfer of Shares of the Company purchased by it pursuant to the
Offer, except as set forth in Instruction 7 of the Letter of Transmittal.
 
    In all cases, payment for Shares tendered and accepted for payment pursuant
to the Offer will be made only after timely receipt by the Depositary of a
certificate(s) for such Shares or a timely confirmation of a book-entry transfer
of such Shares into the Depositary's account at a Book-Entry Transfer Facility
(as defined in Section 3), a Letter of Transmittal (or a facsimile thereof),
properly completed and duly executed, with any required signature guarantees, or
an Agent's Message (as defined in Section 3), and any other documents required
by the Letter of Transmittal. For a description of the procedure for tendering
Shares pursuant to the Offer, see Section 3.
 
    If any tendered Shares are not accepted for payment for any reason or if
certificate(s) are submitted for more Shares than are tendered, certificates
evidencing unpurchased or untendered Shares will be
 
                                       4
<PAGE>
returned without expense to the tendering shareholder (or, in the case of Shares
tendered by book-entry transfer into the Depositary's account at a Book-Entry
Transfer Facility pursuant to the procedures set forth in Section 3, such Shares
will be credited to an account maintained at such Book-Entry Transfer Facility)
as promptly as practicable following the expiration, termination or withdrawal
of the Offer.
 
    If Purchaser increases the consideration offered to shareholders pursuant to
the Offer, such increased consideration will be paid to all shareholders whose
Shares are purchased pursuant to the Offer, whether or not such Shares were
tendered or accepted for payment prior to such increase in consideration.
 
    Purchaser reserves the right to assign, in whole or from time to time in
part, to Parent or another direct or indirect subsidiary of Parent, the right to
purchase all or any portion of the Shares tendered pursuant to the Offer, but
any such assignment will not relieve Purchaser of its obligations under the
Offer nor will any such assignment prejudice in any way the rights of tendering
shareholders to receive payment for Shares validly tendered and accepted for
payment pursuant to the Offer.
 
3.  PROCEDURE FOR TENDERING SHARES
 
    VALID TENDER OF SHARES.  Except as set forth below, in order for Shares to
be validly tendered pursuant to the Offer, the Letter of Transmittal (or a
facsimile thereof), properly completed and duly executed, together with any
required signature guarantees, or an Agent's Message (as defined below) in
connection with a book-entry delivery of Shares as described below, and any
other documents required by the Letter of Transmittal, must be received by the
Depositary at one of its addresses set forth on the back cover of this Offer to
Purchaser. In addition, either (i) certificates evidencing tendered Shares must
be received by the Depositary at any such address or such Shares must be
tendered pursuant to the procedure for book-entry transfer (and a confirmation
of receipt of such delivery must be received by the Depositary), in each case on
or prior to the Expiration Date or (ii) the guaranteed delivery procedures set
forth below must be complied with. The term "Agent's Message" means a message
transmitted by The Depositary Trust Company (the "Book-Entry Transfer Facility")
to and received by the Depositary and forming a part of a book-entry transfer
confirmation, which states that such Book-Entry Transfer Facility has received
an express acknowledgment from the participant in such Book-Entry Transfer
Facility tendering the Shares which are the subject of such Book-Entry
Confirmation, that such participant has received and agrees to be bound by the
terms of the Letter of Transmittal and that Purchaser may enforce such agreement
against such participant.
 
    BOOK-ENTRY TRANSFER.  The Depositary will establish an account with respect
to the Shares at each Book-Entry Transfer Facility for purposes of the Offer
within two business days after the date of this Offer to Purchase. Any financial
institution that is a participant in the system of any Book-Entry Transfer
Facility may make book-entry delivery of Shares by causing a Book-Entry Transfer
Facility to transfer such Shares into the Depositary's account in accordance
with that Book-Entry Transfer Facility's procedures for such transfer. Although
delivery of Shares may be effected through book-entry transfer at a Book-Entry
Transfer Facility, the Letter of Transmittal (or a facsimile thereof), properly
completed and duly executed, together with any required signature guarantees, or
an Agent's Message in connection with a book-entry transfer, and any other
required documents, must, in any case, be received by the Depositary at one of
its addresses set forth on the back cover of this Offer to Purchase on or prior
to the Expiration Date, or the guaranteed delivery procedures described below
must be complied with.
 
    DELIVERY OF DOCUMENTS TO A BOOK-ENTRY TRANSFER FACILITY IN ACCORDANCE WITH
SUCH BOOK-ENTRY TRANSFER FACILITY'S PROCEDURES DOES NOT CONSTITUTE DELIVERY TO
THE DEPOSITARY.
 
    SIGNATURE GUARANTEES.  Except as otherwise provided below, signatures on
Letters of Transmittal must be guaranteed by a financial institution (including
most banks, savings and loan associations and brokerage houses) which is a
participant in the Securities Transfer Agents Medallion Program, the New York
Stock Exchange Medallion Signature Program, or the Stock Exchange Medallion
Program (each of the foregoing constituting an "Eligible Institution").
Signatures on Letters of Transmittal need not be
 
                                       5
<PAGE>
guaranteed if (i) the Letter of Transmittal is signed by the registered holder
of Shares tendered and such holder has not completed either the box entitled
"Special Delivery Instructions" or the box entitled "Special Payment
Instructions" on the Letter of Transmittal, or (ii) such Shares are tendered for
the account of an Eligible Institution. See Instructions 1 and 5 of the Letter
of Transmittal.
 
    If the certificates representing Shares are registered in the name of a
person other than the signer of the Letter of Transmittal, or if payment is to
be made or certificates for Shares not accepted for payment or not tendered are
to be returned to a person other than the registered holder, then the tendered
certificates must be endorsed or accompanied by appropriate stock powers, in
either case signed exactly as the name(s) of the registered holder(s) appear(s)
on the certificates, with the signatures on the certificates or stock powers
guaranteed as described above. See Instructions 1 and 5 of the Letter of
Transmittal.
 
    GUARANTEED DELIVERY.  If a shareholder desires to tender Shares pursuant to
the Offer and such shareholder's certificates are not immediately available, or
time will not permit the certificates and all other required documents to reach
the Depositary on or prior to the Expiration Date, or such shareholder cannot
complete the procedure for book-entry transfer on a timely basis, such Shares
may nevertheless be tendered if the following guaranteed delivery procedures are
satisfied:
 
         (i) such tender is made by or through an Eligible Institution;
 
        (ii) a properly completed and duly executed Notice of Guaranteed
    Delivery, substantially in the form provided by Purchaser, is received by
    the Depositary as provided below on or prior to the Expiration Date; and
 
        (iii) the certificates (or a book-entry transfer confirmation)
    representing all tendered Shares, in proper form for transfer, in each case
    together with the Letter of Transmittal (or a facsimile thereof) properly
    completed and duly executed, with any required signature guarantees (or, in
    the case of a book-entry transfer, an Agent's Message) and any other
    documents required by the Letter of Transmittal are received by the
    Depositary within three New York Stock Exchange ("NYSE") trading days after
    the date of execution of such Notice of Guaranteed Delivery.
 
    The Notice of Guaranteed Delivery may be delivered by hand or transmitted by
telegram, telex, facsimile transmission or mail to the Depositary and must
include a guarantee by an Eligible Institution in the form set forth in such
Notice of Guaranteed Delivery.
 
    THE METHOD OF DELIVERY OF CERTIFICATES AND ALL OTHER REQUIRED DOCUMENTS,
INCLUDING DELIVERY THROUGH ANY BOOK-ENTRY TRANSFER FACILITY, IS AT THE OPTION
AND RISK OF THE TENDERING SHAREHOLDER AND THE DELIVERY WILL BE DEEMED MADE ONLY
WHEN ACTUALLY RECEIVED BY THE DEPOSITARY. IF DELIVERY IS BY MAIL, REGISTERED
MAIL WITH RETURN RECEIPT REQUESTED, PROPERLY INSURED IS RECOMMENDED. IN ALL
CASES, SUFFICIENT TIME SHOULD BE ALLOWED TO INSURE TIMELY DELIVERY.
 
    BACKUP FEDERAL INCOME TAX WITHHOLDING.  To prevent backup federal income tax
withholding on payments made to shareholders with respect to the price of Shares
purchased pursuant to the Offer, each such shareholder must provide the
Depositary with such shareholder's correct taxpayer identification number
("TIN") and certify that such shareholder is not subject to backup United States
federal income tax withholding by completing the substitute Form W-9 included in
the Letter of Transmittal. See Instruction 10 of the Letter of Transmittal. If
the shareholder is a nonresident alien or foreign entity not subject to back-up
withholding, the shareholder must give the Depositary a completed Form W-8
Certificate of Foreign Status prior to receipt of any payments.
 
    APPOINTMENT AS PROXY.  By executing a Letter of Transmittal, a tendering
shareholder irrevocably appoints designees of Purchaser as such shareholder's
proxies in the manner set forth in the Letter of Transmittal to the full extent
of such shareholder's rights with respect to the Shares tendered by such
shareholder and accepted for payment by Purchaser (and with respect to any and
all other Shares or other securities issued or issuable in respect of such
Shares on or after the date of this Offer to
 
                                       6
<PAGE>
Purchase). All such proxies shall be irrevocable and coupled with an interest in
the tendered Shares. Such appointment will be effective when, and only to the
extent that, Purchaser accepts such Shares for payment. Upon such acceptance for
payment, all prior proxies and consents granted by such shareholder with respect
to such Shares and other securities will be revoked without further action, and
no subsequent proxies may be given nor subsequent written consents executed
(and, if given or executed, such proxies or consents will not be deemed
effective). The designees of Purchaser will be empowered to exercise all voting
and other rights of such shareholder as they, in their sole discretion, may deem
proper at any annual, special or adjourned meeting of the Company's
shareholders, by written consent or otherwise. Purchaser reserves the right to
require that, in order for Shares to be deemed validly tendered, immediately
upon Purchaser's payment for such Shares, Purchaser must be able to exercise
full voting rights with respect to such Shares, including voting at any meeting
of shareholders scheduled or acting by written consent without a meeting.
 
    DETERMINATION OF VALIDITY.  All questions as to the validity, form,
eligibility (including time of receipt) and acceptance for payment of any tender
of Shares will be determined by Purchaser in its sole discretion, which
determination shall be final and binding. Purchaser reserves the absolute right
to reject any and all tenders of Shares determined by it not to be in proper
form or the acceptance for payment of which may, in the opinion of Purchaser's
counsel, be unlawful. Purchaser reserves the absolute right to waive any defect
or irregularity in any tender of Shares of any particular shareholder.
Purchaser's interpretation of the terms and conditions of the Offer (including
the Letter of Transmittal and the Instructions thereto) will be final and
binding. None of Purchaser, Parent, any of their affiliates or assigns, the
Dealer Manager, the Depositary, the Information Agent or any other person will
be under any duty to give notification of any defects or irregularities in
tenders or incur any liability for failure to give any such notification.
 
4.  WITHDRAWAL RIGHTS
 
    Tenders of Shares pursuant to the Offer may be withdrawn at any time on or
prior to the Expiration Date. Thereafter, such tenders are irrevocable, except
that they may be withdrawn after October 4, 1998 unless theretofore accepted for
payment as provided in this Offer to Purchase. If Purchaser extends the Offer,
is delayed in accepting for payment or paying for Shares or is unable to accept
for payment or pay for Shares pursuant to the Offer for any reason, then,
without prejudice to Purchaser's rights under the Offer, the Depositary may, on
behalf of Purchaser, retain all Shares tendered, and such Shares may not be
withdrawn except to the extent that tendering shareholders are entitled to
withdrawal rights as set forth in this Section 4.
 
    For a withdrawal to be effective, a written, telegraphic, telex or facsimile
transmission notice of withdrawal must be timely received by the Depositary at
one of its addresses set forth on the back cover of this Offer to Purchase. Any
notice of withdrawal must specify the name of the person who tendered the Shares
to be withdrawn, the number of Shares to be withdrawn and the name of the
registered holder, if different from that of the person who tendered such
Shares. If certificates evidencing Shares to be withdrawn have been delivered or
otherwise identified to the Depositary, then prior to the physical release of
such certificates, the serial numbers shown on such certificates must be
submitted to the Depositary, and the signatures on the notice of withdrawal must
be guaranteed by an Eligible Institution unless such Shares have been tendered
for the account of an Eligible Institution. If Shares have been tendered
pursuant to the procedure for book-entry transfer set forth in Section 3, the
notice of withdrawal must specify the name and number of the account at the
Book-Entry Transfer Facility to be credited with the withdrawn Shares.
 
    Withdrawals may not be rescinded, and Shares withdrawn will thereafter be
deemed not validly tendered for purposes of the Offer. However, withdrawn Shares
may be retendered at any time prior to the Expiration Date by again following
one of the procedures described in Section 3.
 
                                       7
<PAGE>
    All questions as to the form and validity (including time of receipt) of any
notice of withdrawal will be determined by Purchaser, in its sole discretion,
whose determination shall be final and binding. None of Purchaser, Parent, any
of their affiliates or assigns, the Dealer Manager, the Depositary, the
Information Agent or any other person will be under any duty to give
notification of any defects or irregularities in any notice of withdrawal or
incur any liability for failure to give such notification.
 
5.  CERTAIN FEDERAL INCOME TAX CONSEQUENCES OF THE OFFER AND THE MERGER
 
    The following is a summary of the principal United States federal income tax
considerations of the Offer and the Merger to holders whose Shares are purchased
pursuant to the Offer or the Merger (including any cash amounts received by
dissenting shareholders pursuant to the exercise of appraisal rights). The
discussion is for general information only and does not purport to consider all
aspects of United States federal income taxation that may be relevant to holders
of Shares. The discussion is based on current provisions of the Internal Revenue
Code of 1986, as amended (the "Code"), existing, proposed and temporary
regulations promulgated thereunder and administrative and judicial
interpretations thereof, all of which are subject to change. The discussion
applies only to holders of Shares in whose hands Shares are capital assets
within the meaning of Section 1221 of the Code, and may not apply to Shares
received pursuant to the exercise of employee stock options or otherwise as
compensation, or to certain types of holders of Shares (such as insurance
companies, tax-exempt organizations and broker-dealers) who may be subject to
special rules under the United States federal income tax laws. This discussion
does not discuss the United States federal income tax consequences to a holder
of Shares who, for United States federal income tax purposes, is a non-resident
alien individual, a foreign corporation, a foreign partnership or a foreign
estate or trust, nor does it consider the effect of any foreign, state or local
tax laws.
 
    BECAUSE INDIVIDUAL CIRCUMSTANCES MAY DIFFER, EACH HOLDER OF SHARES SHOULD
CONSULT SUCH HOLDER'S OWN TAX ADVISOR TO DETERMINE THE APPLICABILITY OF THE
RULES DISCUSSED BELOW TO SUCH HOLDER AND THE PARTICULAR TAX EFFECTS TO SUCH
HOLDER OF THE OFFER AND THE MERGER, INCLUDING THE APPLICATION AND EFFECT OF
STATE, LOCAL AND OTHER INCOME TAX LAWS.
 
    The receipt of cash for Shares pursuant to the Offer or the Merger
(including any cash amounts received by dissenting shareholders pursuant to the
exercise of appraisal rights) will be a taxable transaction for United States
federal income tax purposes and also may be a taxable transaction under
applicable state, local and other income tax law. In general, for United States
federal income tax purposes, a tendering shareholder will recognize gain or loss
equal to the difference between (i) the holder's adjusted tax basis in the
Shares tendered pursuant to the Offer or the Merger and (ii) the amount of cash
received by the shareholder pursuant to the Offer or the Merger. Gain or loss
must be determined separately for each block of Shares (i.e., Shares acquired at
the same cost in a single transaction) sold pursuant to the Offer or the Merger.
Assuming that Shares are held as a capital asset, such gain or loss will be a
capital gain or loss. Under the recently enacted Internal Revenue Service
Restructuring and Reform Act of 1998, such capital gain will be a long-term
capital gain taxable to a non-corporate holder at a maximum rate of 20% if the
Shares have been held for more than one year on the date of sale (in the case of
the Offer) or the Effective Time of the Merger (in the case of the Merger); and
a short-term capital gain taxable to a non-corporate holder at ordinary income
tax rates (a maximum rate of up to 39.6%) if the Shares have been held for one
year or less on the date of sale (or the Effective Time of the Merger). These
rates are effective for taxable years of individual taxpayers ending after
December 31, 1997. The maximum net capital gain tax rate for corporations is
35%.
 
    Payments in connection with the Offer or the Merger may be subject to
"backup withholding" at a rate of 31%, unless a holder of Shares (i) is a
corporation or comes within certain exempt categories and, when required,
demonstrates this fact or (ii) provides a correct TIN to the payor, certifies as
to no loss of exemption from backup withholding and otherwise complies with
applicable requirements of the backup withholding rules. A holder who does not
provide a correct TIN may be subject to penalties imposed by the Internal
Revenue Service. Any amount paid as backup withholding does not constitute an
additional
 
                                       8
<PAGE>
tax and will be creditable against the holder's Untied States federal income tax
liability. Each holder of Shares should consult with his or her tax advisor to
determine qualification for exemption from backup withholding and the procedure
for obtaining such exemption. Holders tendering their Shares in the Offer may
avoid backup withholding by completing the Substitute Form W-9 included in the
Letter of Transmittal. See Section 3.
 
6.  PRICE RANGE OF THE SHARES
 
    The Company's Shares are listed and traded on the NYSE under the symbol ZEI.
The following table sets forth, for the periods indicated, the high and low
closing prices per share for the Shares for the periods indicated as reported by
the National Quotation Bureau, LLC.
 
<TABLE>
<CAPTION>
                                                                             HIGH          LOW
                                                                         ------------  ------------
<S>                                                                      <C>           <C>
Quarter Ended:
  1998
    Third (through August 3, 1998).....................................  $      1715/16 $      157/8
    Second.............................................................         2011/16        167/16
    First..............................................................         171/8         131/16
  1997
    Fourth.............................................................  $      24     $      151/4
    Third..............................................................         271/4         227/8
    Second.............................................................         277/8         23
    First..............................................................         271/2         211/4
  1996
    Fourth.............................................................  $      213/4  $      171/4
    Third..............................................................         175/8         131/4
    Second.............................................................         173/8         141/2
    First..............................................................         141/2         121/4
</TABLE>
 
    On August 3, 1998, the last full trading day prior to announcement of the
execution of the Merger Agreement and Purchaser's intention to commence the
Offer, the closing sale price of the Shares on the NYSE was $15.94 per Share. On
August 4, 1998, the last full trading day prior to the commencement of the
Offer, such closing sale price was $20.44 per Share. SHAREHOLDERS ARE URGED TO
OBTAIN A CURRENT MARKET QUOTATION FOR THE SHARES.
 
7.  CERTAIN INFORMATION CONCERNING THE COMPANY
 
    GENERAL.  The Company is a Delaware corporation with its principal office
located at 50 Jerome Lane, Fairview Heights, Illinois 62208. The Company,
through its subsidiaries, currently operates seven active underground and
surface coal mining complexes located in five states, two east coast
transloading terminals, a power marketing business, and other energy-related
businesses.
 
    FINANCIAL INFORMATION.  Set forth below is certain selected consolidated
financial information with respect to the Company and its subsidiaries. More
comprehensive financial information is included in reports and other documents
filed by the Company with the Commission, and the following summary is qualified
in its entirety by reference to such reports and other documents and all of the
financial information (including any related notes) contained therein. Such
reports and other documents are available for inspection and copies thereof are
obtainable in the manner set forth below under "Available Information."
 
                                       9
<PAGE>
                          ZEIGLER COAL HOLDING COMPANY
                      SELECTED CONSOLIDATED FINANCIAL DATA
 
                          STATEMENT OF OPERATIONS DATA
                (AMOUNTS IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)
 
<TABLE>
<CAPTION>
                                                                 SIX MONTHS ENDED
                                                                     JUNE 30,                   YEAR ENDED DECEMBER 31,
                                                            --------------------------  ----------------------------------------
                                                                1998          1997          1997          1996          1995
                                                            ------------  ------------  ------------  ------------  ------------
<S>                                                         <C>           <C>           <C>           <C>           <C>
                                                                   (UNAUDITED)
Total revenues............................................  $    388,598  $    348,055  $    800,756  $    731,624  $    783,103
Costs and expenses:
  Cost of coal sales......................................       259,991       240,533       503,946       613,166       686,232
  Selling, general and administrative
    expenses..............................................         6,057        10,159        16,017        21,271        20,740
  Other costs and expenses................................        88,238        54,879       194,809         6,219       109,850
                                                            ------------  ------------  ------------  ------------  ------------
      Total costs and expenses............................       354,286       305,571       714,772       640,656       816,822
Other income..............................................         3,766       --            --            --             45,500
Net interest expense......................................         5,763         8,637        16,997        21,704        27,478
Income taxes (benefit)....................................         4,847         6,090        10,348        11,300        (4,484)
Extraordinary item--loss on early
  extinguishment of debt (net of taxes)...................         6,637       --            --            --            --
                                                            ------------  ------------  ------------  ------------  ------------
Net earnings (loss).......................................  $     20,831  $     27,757  $     58,639  $     57,964  ($    11,213)
                                                            ------------  ------------  ------------  ------------  ------------
                                                            ------------  ------------  ------------  ------------  ------------
Net earnings (loss) per common share
  Basic--
    Net earnings before extraordinary item................  $        .97  $        .98  $       2.07  $       2.04  ($       .40)
    Extraordinary item....................................          (.23)      --            --            --            --
                                                            ------------  ------------  ------------  ------------  ------------
      Net earnings........................................  $        .74  $        .98  $       2.07  $       2.04  ($       .40)
                                                            ------------  ------------  ------------  ------------  ------------
                                                            ------------  ------------  ------------  ------------  ------------
  Diluted--
    Net earnings before extraordinary item................  $        .96  $        .96  $       2.05  $       2.04  ($       .40)
    Extraordinary item....................................          (.23)      --            --            --            --
                                                            ------------  ------------  ------------  ------------  ------------
      Net earnings........................................  $        .73  $        .96  $       2.05  $       2.04  ($       .40)
                                                            ------------  ------------  ------------  ------------  ------------
                                                            ------------  ------------  ------------  ------------  ------------
Weighted average shares outstanding
  Basic...................................................        28,207        28,342        28,261        28,362        28,356
  Diluted.................................................        28,365        28,795        28,646        28,483        28,356
</TABLE>
 
                        CONSOLIDATED BALANCE SHEET DATA
                             (AMOUNTS IN THOUSANDS)
 
<TABLE>
<CAPTION>
                                                            AT JUNE 30,        AT DECEMBER 31,
                                                            ------------  --------------------------
                                                                1998          1997          1996
                                                            ------------  ------------  ------------
<S>                                                         <C>           <C>           <C>
                                                            (UNAUDITED)
Total assets..............................................  $   984,900   $  1,077,404  $  1,050,625
Long-term debt, including current maturities..............      255,800        344,142       344,770
Accrued post retirement benefit obligations...............      257,893        253,700       245,385
Total liabilities.........................................      790,222        899,664       918,019
</TABLE>
 
                                       10
<PAGE>
    PROJECTED FINANCIAL INFORMATION.  Prior to entering into the Merger
Agreement, the Purchaser conducted a due diligence review of the Company and in
connection with such review received certain non-public information from the
Company. The non-public information included, among other things, projected
financial information (the "Financial Model") for the coal segment of the
business for fiscal years ending December 31, 1998 to 2002. The Financial Model
was prepared by the Company's management based on numerous assumptions,
including among others, the estimated 1997 financial results and projections of
total tons sold, revenue, net gross profit, operating expenses, depreciation,
depletion and amortization and capital expenditure requirements. Set forth below
is a summary of projected income statement and cash flow items for fiscal years
ending December 31, 1998 to 2002. None of the assumptions in the Financial Model
give effect to the Offer, the Merger or the financing thereof or the potential
combined operations of the Parent and the Company after consummation of such
transactions.
 
    The Company has advised Purchaser that it does not as a matter of course
disclose projections as to future revenues or earnings, and the projections
discussed in the Financial Model were not intended to forecast likely or
anticipated operating revenues. The projections discussed in the Financial Model
were not prepared with a view to public disclosure or compliance with published
guidelines of the Commission or the American Institute of Certified Public
Accountants for projections. The forecasted information is included herein
solely because such information was furnished to Parent and the Purchaser or its
financial advisors. Accordingly, the inclusion of the projections in this Offer
should not be regarded as an indication that Parent or Purchaser or the Company
or their respective financial advisors or their respective officers and
directors consider such information to be accurate or reliable, and none of such
persons assumes any responsibility for the accuracy therefor. The Financial
Model was prepared for internal use and is subjective in many respects and thus
susceptible to various interpretations and periodic revision based upon actual
experience and business development. In addition, because the estimates and
assumptions underlying the Financial Model are inherently subject to significant
economic and competitive uncertainties and contingencies which are difficult or
impossible to predict accurately and are beyond the control of the Company
and/or Parent and/or the Purchaser, there can be no assurance that the Financial
Model will be realized. Accordingly, it is expected that there will be
differences between actual and projected results, and actual results may be
materially higher or lower than those set forth below.
 
                          ZEIGLER COAL HOLDING COMPANY
                    SUMMARY BUSINESS PLAN FOR COAL BUSINESS
                                ($ IN MILLIONS)
 
<TABLE>
<CAPTION>
                                                                PROJECTED FOR THE FISCAL YEAR ENDING DECEMBER 31,
                                                                  1998       1999       2000       2001       2002
                                                                ---------  ---------  ---------  ---------  ---------
<S>                                                             <C>        <C>        <C>        <C>        <C>
Tons Sold.....................................................       37.2       54.0       59.8       60.2       68.4
Revenue.......................................................  $   627.1  $   749.3  $   806.2  $   818.9  $   910.9
EBITDA(1).....................................................      157.5      184.8      193.0      193.9      219.7
EBIT(1).......................................................       97.3      108.0      109.4      113.3      133.0
 
Selected Cash Flow Items:
  Depreciation, Depletion and Amortization....................  $    60.2  $    76.8  $    83.6  $    80.6  $    86.7
  Capital Expenditures........................................      103.5       85.1       44.9       64.6       55.1
</TABLE>
 
Note 1:  Before allocation of corporate overhead.
 
    AVAILABLE INFORMATION.  The Company is registered under the Exchange Act
and, accordingly, is subject to the informational filing requirements of the
Exchange Act. In accordance therewith the Company files periodic reports, proxy
statements and other information with the Commission under the
 
                                       11
<PAGE>
Exchange Act relating to its business, financial condition and other matters.
The Company is required to disclose in such proxy statements certain
information, as of particular dates, concerning the Company's directors and
officers, their remuneration, stock options granted to them, the principal
holders of the Company's securities and any material interest of such persons in
transactions with the Company. Such reports, proxy statements and other
information may be inspected at the Commission's office at 450 Fifth Street,
N.W., Washington, D.C. 20549, and also should be available for inspection and
copying at the regional offices of the Commission located at 500 West Madison
Street, Suite 1400, Chicago, Illinois 60661-2511; and 7 World Trade Center, 13th
Floor, New York, New York 10048. Copies may be obtained by mail from the Public
Reference Section of the Commission, 450 Fifth Street, N.W., Washington, D.C.
20549, at prescribed rates. The Commission also maintains a World Wide Website
on the Internet at http://www.sec.gov which site contains registration
statements, reports, proxy and information statements and other information
regarding registrants that file electronically with the Commission, including
the Company. In addition, such material should be available for inspection at
the offices of the NYSE, 20 Broad Street, New York, New York 10005.
 
8.  CERTAIN INFORMATION CONCERNING PURCHASER AND PARENT
 
    GENERAL.  Purchaser, a Delaware corporation and a wholly owned subsidiary of
Parent, recently was organized for the purpose of effecting the Offer and the
Merger, and has not carried on any activities except in connection with the
Offer and the Merger. The principal executive offices of Purchaser are located
at 1500 North Big Run Road, Ashland, Kentucky 41102. All the outstanding capital
stock of Purchaser is owned by Parent.
 
    Parent is a Delaware corporation with its principal offices located at 1500
North Big Run Road, Ashland, Kentucky 41102. Parent's principal business is the
mining and marketing of bituminous coal, which is sold primarily to electric
utilities under long-term agreements. Parent also mines and markets
metallurgical coal. Parent currently operates mines in Kentucky, Tennessee,
Colorado, Indiana and West Virginia.
 
    Parent was incorporated in May 1998 to become the holding company for AEI
Holding Company, Inc. ("AEI Holding"). Parent has two stockholders, Larry
Addington and Addington Enterprises, Inc. ("AEI"), each of whom holds a 50%
equity interest in Parent. Mr. Addington holds an 80% equity interest in AEI.
AEI Holding, the predecessor corporation to Parent, was incorporated in
September 1997 as a holding company for certain operating companies affiliated
with Mr. Addington and AEI. Parent acquired all of the outstanding capital stock
of AEI Holding from Mr. Addington and AEI on June 26, 1998, in exchange for an
equal number of shares of Parent.
 
    The name, business address, present principal occupation or employment,
five-year employment history and citizenship of each director and executive
officer of Purchaser and Parent are set forth in Schedule I.
 
    Except as described in this Offer to Purchase, (i) none of Purchaser or
Parent or, to the best knowledge of Purchaser or Parent, any of the persons
listed in Schedule I or any associate or majority owned subsidiary of any such
persons, beneficially owns or has a right to acquire any equity security of the
Company and (ii) none of Purchaser or Parent or, to the best knowledge of
Purchaser or Parent, any of the other persons referred to above, or any of the
respective directors, executive officers or subsidiaries of any of the
foregoing, has effected any transaction in any equity security of the Company
during either the past 60 days or the past six months.
 
    Except as described in this Offer to Purchase, (i) none of Purchaser, Parent
or, to the best knowledge of Purchaser or Parent, any of the persons listed in
Schedule I has any contract, arrangement, understanding or relationship (whether
or not legally enforceable) with any other person with respect to any securities
of the Company, including, but not limited to, any contract, arrangement,
understanding or relationship concerning the transfer of the voting of any such
securities, joint ventures, loan or option
 
                                       12
<PAGE>
arrangements, puts or calls, guarantees of loans, guarantees against loss, or
the giving or withholding of proxies; (ii) there have been no contacts,
negotiations or transactions between Purchaser, Parent or any
of their respective subsidiaries or, to the best knowledge of Purchaser or
Parent, any of the persons listed on Schedule I on the one hand, and the Company
or any of its directors, officers or affiliates, on the other hand, concerning a
merger, consolidation or acquisition, tender offer or other acquisition of
securities, election of directors, a sale or other transfer of a material amount
of assets or concerning any other transactions with the Company that are
required to be disclosed pursuant to the rules and regulations of the
Commission.
 
9.  BACKGROUND OF THE OFFER
 
    From May to July 1997, representatives of AEI and the Company held several
discussions relating to the possible sale of coal mining assets held by AEI and
related parties to the Company. These discussions concluded without any
agreement between the Company and AEI.
 
    In February 1998, on behalf of the Company, representatives of CSFB
contacted AEI and several other companies regarding their potential interest in
pursuing a strategic transaction with the Company. AEI entered into a
confidentiality agreement with the Company on March 6, 1998 and shortly
thereafter received an Offering Memorandum describing the Company. On or about
March 9, 1998, AEI indicated its preliminary interest in exploring a possible
transaction and its desire to conduct a business, financial and legal review of
the Company.
 
    In mid-March 1998, AEI was notified that it was among the bidders with whom
the Company was interested in holding further discussions and the Company
scheduled a management presentation for AEI. Shortly thereafter, AEI entered
into discussions with a potential investor (the "Prospective Investor") in
connection with AEI's proposal to purchase the Company. In late March and early
April 1998, senior management of the Company made its presentation to
representatives of AEI and the Prospective Investor, who performed due diligence
and conducted site visits to the Company's mining and other co-related
facilities.
 
    On April 22, 1998, AEI received guidelines for submitting proposals, and, on
May 22, 1998, Parent, a newly formed holding company for the natural resource
operations conducted by AEI, submitted its proposal to the Company. On May 26,
1998, a representative of the Company notified AEI that the Company had decided
to commence negotiations with Parent. Promptly thereafter, the Company and
Parent entered into an agreement providing for an exclusive negotiating period
through June 25, 1998. These negotiations continued through July 7, 1998. In
addition, Parent and the Prospective Investor held discussions regarding the
structure, financing and nature of their relationship.
 
    On July 10, 1998, Parent terminated discussions with the Prospective
Investor, and representatives of Parent contacted the Company through its
financial advisor to express Parent's interest in submitting a new proposal. AEI
then engaged Warburg Dillon Read LLC as its financial advisor in connection with
its proposal to acquire the Company. Shortly thereafter, representatives of
Parent and Warburg Dillon Read LLC met with CSFB to discuss possible terms of a
new proposal and conducted additional due diligence with respect to the Company.
On July 20, 1998, Parent received a proposed acquisition agreement on behalf of
the Company reflecting the prior discussions between the parties. From July 27
to August 3, 1998, representatives of Parent and the Company, and their
respective legal and financial advisors conducted extensive negotiations of the
definitive terms of the Offer, the Merger Agreement and related agreements.
Representatives of certain principal shareholders of the Company actively
participated in the negotiations.
 
    On August 3, 1998, the respective directors and stockholders of Parent and
Purchaser approved the Merger Agreement, the Offer and the other related
transactions. The Merger Agreement, the Offer and the other related transactions
were approved by the Board of Directors of the Company at a meeting on August 3,
1998. Parent, Purchaser and the Company entered into the Merger Agreement
following the close of business on August 3, 1998, and promptly thereafter the
parties issued press releases to announce the transaction.
 
                                       13
<PAGE>
10. PURPOSE OF THE OFFER; THE MERGER AGREEMENT
 
PURPOSE OF THE OFFER
 
    The Offer is being made pursuant to the Merger Agreement. The purpose of the
Offer, the Merger and the Merger Agreement is to enable Parent to obtain control
of and to own the entire equity interest in, the Company. See Section 6.
 
THE MERGER AGREEMENT
 
    The following is a brief summary of certain provisions of the Merger
Agreement. This summary does not purport to be complete and is qualified in its
entirety by reference to the Merger Agreement, which is an exhibit to the
Schedule 14D-1 filed by Parent with the Commission in connection with the Offer.
 
THE OFFER
 
    The Merger Agreement requires that no later than two business days after the
public announcement of the terms of this Agreement, (i) Parent and Purchaser
file Purchaser's Tender Offer Statement on Schedule 14D-1 with the Commission
and commence the Offer in accordance with the requirements of Regulations 14D
and 14E promulgated under the Exchange Act and (ii) the Company file with the
Commission the Company's Solicitation/Recommendation Statement on Schedule 14D-9
with respect to the Offer, which will be mailed to the holders of Shares and
contains the recommendation of the Company's Board of Directors that holders of
Shares accept the Offer. Parent, Purchaser and the Company have each agreed to
use its reasonable best efforts to cause all the Offer Conditions to be
fulfilled and to avoid the occurrence of any event or to cure any event that may
prevent the Offer Conditions from being fulfilled.
 
    The obligation of Purchaser to accept for payment and pay for any Shares
tendered pursuant to the Offer is subject only to the conditions to the Offer
set forth in Section 13 (the "Offer Conditions"). Without the prior written
consent of the Company, Purchaser may not decrease the Offer Price or change the
form of consideration payable in the Offer, decrease the number of Shares
Purchaser seeks to purchase in the Offer, change the Offer Conditions, impose
additional conditions to the Offer, or amend any other term of the Offer in any
manner adverse to the holders of Shares. Purchaser may waive any condition to
the Offer other than the Minimum Condition without the consent of the Company.
Subject to the satisfaction of all the Offer Conditions as of any Expiration
Date, Purchaser will accept for payment and pay for all Shares validly tendered
and not withdrawn pursuant to the Offer as soon as practicable after such
Expiration Date. Parent must make reasonable provision for payment of the Offer
proceeds to be made by wire transfer of immediately available funds to any
person tendering Shares representing more than 1% of the outstanding Shares.
 
BOARD REPRESENTATION
 
    Promptly upon the purchase by Purchaser of Shares pursuant to the Offer and
from time to time thereafter, Purchaser will be entitled to designate at least a
number of directors on the Company's Board of Directors equal to the product of
(i) the total number of directors on the Company's Board of Directors and (ii)
Purchaser's percentage ownership of the outstanding Shares of the Company. The
Company will either increase the size of the Company's Board of Directors or
secure the resignation of the necessary number of directors to enable
Purchaser's designees to be elected to the Company's Board of Directors, and
will cause such designees to be elected to the Company's Board of Directors.
 
COMPANY STOCK OPTIONS
 
    The Merger Agreement provides that promptly after the commencement of the
Offer, the Company must offer to cancel any and all of the outstanding options
to purchase Shares and each outstanding stock appreciation right (each such
option to purchase one share and each such unit representing one share being
referred to as an "Option") granted under the Company's Incentive Stock Option
Plan and
 
                                       14
<PAGE>
the Company's Stock Appreciation Rights Plan (together, the "Option Plan") for
cash consideration as follows. Each holder of a vested Option (after giving
consideration to any acceleration of vesting provided in the Option Plan or the
Company's Special Bonus and Severance Plan (the "SBS Plan")) will be offered the
right to have 100% of his or her Options canceled by the Company in
consideration of a payment by the Company for each Option in an amount equal to
the excess of the Offer Price over the applicable exercise price of such Option
(the "Option Consideration"). Cancellation of and payment of the consideration
for the Options will be conditioned upon the purchase of Shares by the Purchaser
pursuant to the Offer. If the Purchaser purchases Shares pursuant to the Offer,
the Options will be canceled and the consideration therefor will be paid as
promptly as possible following the purchase of Shares by the Purchaser upon
expiration of the Offer.
 
    The Merger Agreement also provides that at the Effective Time, each then
outstanding Option will be converted automatically into the right to receive the
Option Consideration, but only to the extent then vested and exercisable, taking
into account any acceleration of vesting provided for in the Option Plan or the
SBS Plan. The Option Consideration will be paid upon delivery of any then
outstanding Options by or on behalf of the Option holder.
 
THE MERGER
 
    The Merger Agreement provides that at the Effective Time (as defined below)
and upon the terms and subject to the conditions of the Merger Agreement and
Delaware law, Purchaser will merge with and into the Company, the separate
corporate existence of Purchaser will cease, and the Company will continue as
the surviving corporation, succeeding to and assuming all the rights and
obligations of Purchaser in accordance with Delaware law.
 
    As soon as practicable after the satisfaction or waiver of the conditions to
the Merger, the parties will file a certificate of ownership and merger with the
Secretary of State of the State of Delaware and will make all other filings or
recordings required under Delaware law. The Merger will become effective upon
the filing of the certificate of ownership and merger or such later time
specified in such certificate (the "Effective Time").
 
    At the Effective Time, (i) each Share not purchased by Purchaser in the
Offer (other than Shares held by stockholders who properly exercise appraisal
rights under Delaware law and Shares owned by the Company or one of its
subsidiaries or by Parent or Purchaser or one of its subsidiaries) will be
converted by operation of law into the right to receive the Merger Consideration
in cash, payable to the holder, without interest, upon surrender of the
certificate formerly representing such Common Share, (ii) each Share owned by
the Company or one of its subsidiaries or by Parent or Purchaser or one of its
subsidiaries will be canceled without payment, and (iii) each share of the
common stock of the Purchaser outstanding immediately before the Effective Time
will be converted into one share of common stock of the Company, as the
surviving corporation of the Merger.
 
    Shares outstanding immediately prior to the Effective Time and held by a
holder who has not voted in favor of the Merger or consented thereto in writing
will have the right to demand appraisal for such Shares in accordance with
Delaware law unless such holder fails to perfect or withdraws or otherwise loses
his or her right to appraisal and payment under Delaware law. If, after the
Effective Time, any such holder fails to perfect or withdraws or loses his right
to appraisal, the holder's Shares will be treated as if they had been converted
as of the Effective Time into the right to receive the Merger Consideration
without interest.
 
    Promptly after the Effective Time, the surviving corporation will mail each
record holder as of the Effective Time a letter of transmittal and instructions
for effecting the surrender of certificates that represented Shares prior to the
Effective Time for the Merger Consideration. Upon surrender of the
certificate(s) representing a holder's Shares, together with a completed and
validly executed letter of transmittal, such holder will be entitled to receive
the Merger Consideration in respect thereof. Until so surrendered or exchanged,
each certificate will represent only the right to receive the Merger
Consideration.
 
                                       15
<PAGE>
REPRESENTATIONS AND WARRANTIES
 
    The Merger Agreement contains various customary representations and
warranties of the Company, including representations by the Company as to: (i)
organization, qualification and similar corporate matters of the Company and its
subsidiaries, (ii) capitalization of the Company and its subsidiaries, (iii) the
authorization, execution, delivery, performance and enforceability of the Merger
Agreement, (iv) the non-contravention of the Merger Agreement and related
transactions with any provision of the Company's certificate of incorporation or
bylaws, material contract, order, law or regulation to which the Company or its
subsidiaries is a party or by which it is bound or obligated, (v) the filing of
required Commission reports and the absence of untrue statements of material
facts or omissions of material facts in such reports, (vi) the absence of
changes or events which have had a material adverse effect on the Company, (vii)
the absence of any untrue statement of a material fact or omission of any
material fact required to be stated in any recommendation statement of the
Company's Board of Directors or document related to the Offer, (viii) material
transactions outside the ordinary course of the Company's business consistent
with past practice, (ix) real property ownership and the possession and
enforceability of real property leases, (x) ownership of personal property and
operating condition of machinery and equipment, (xi) claims and litigation,
(xii) the filing of tax returns and the payment of taxes, (xiii) possession and
validity of mining permits necessary to carry on the Company's business as
presently conducted, (xiv) compliance with laws, rules, statutes, orders,
ordinances or regulations, and material notes, bonds, mortgages, indentures,
contracts, agreements, leases, licenses, permits, franchise or other instruments
or obligations of the Company or any of its subsidiaries, (xv) the absence of
environmental claims and compliance with all environmental, mining and safety
laws and regulations, (xvi) possession of necessary rights and licenses in
intellectual property, (xvii) contracts, agreements, indentures, leases,
mortgages, licenses, plans, arrangements, understandings, commitments and other
instruments (the "Significant Agreements"), (xviii) employee benefit matters,
(xix) required consents and approvals of governmental or regulatory authorities,
(xx) possession of insurance policies, (xxi) the absence of payments to any
intermediary other than listed intermediaries of any finder's, professional or
other fee or commission, (xxii) labor matters, (xxiii) continued eligibility of
the Company and its subsidiaries to receive mining permits, (xxiv) transactions
between the Company, its affiliates and related parties, and (xxv) the
inapplicability of state takeover statutes. Many of the representations and
warranties are qualified by materiality requirements.
 
    The Merger Agreement contains various customary representations and
warranties of Parent and Purchaser, including representations by Parent and
Purchaser as to: (i) organization, qualification and similar corporate matters
of Parent and Purchaser, (ii) the authorization, execution, delivery,
performance and enforceability of the Merger Agreement, (iii) the
non-contravention of the Merger Agreement and related transactions with any
provision of the certificate of incorporation or by-laws of Parent or Purchaser,
material contract, order, law or regulation to which Parent or Purchaser is a
party or by which it is bound or obligated, (iv) required consents and approvals
of governmental or regulatory authorities, (v) the absence of untrue statements
of material facts or omissions of material facts in any documents related to the
Offer and in information provided to the Company in connection with the Schedule
14D-1 and proxy statement, (vi) Purchaser's receipt and the continued
effectiveness of the Commitment Letter from UBS AG to provide the funds
necessary to satisfy Purchaser's obligations under the Merger Agreement, (vii)
the solvency of the Company after the Effective Time of the Merger, and (viii)
the beneficial ownership of Shares by Parent or Purchaser immediately prior to
execution of the Merger Agreement.
 
COVENANTS
 
    CONDUCT OF BUSINESS OF THE COMPANY.  During the term of the Merger Agreement
until the purchase of Shares by Purchaser, the Company and its subsidiaries will
each conduct its operations in the ordinary course of business consistent with
past practice, and the Company and its subsidiaries will each use all reasonable
efforts to preserve its business organization, to keep available the services of
its
 
                                       16
<PAGE>
present officers and key employees and to preserve the goodwill of those having
business relationships with it.
 
    Accordingly, prior to the purchase of Shares by Purchaser, neither the
Company nor any of its subsidiaries may, without the prior written consent of
Parent, which consent will not be unreasonably withheld or delayed, engage or
agree to engage in an enumerated list of transactions. The types of transactions
requiring Parent's prior approval, subject to certain threshhold amounts or
levels in certain cases, include actions by the Company or its subsidiaries to:
(i) amend its Certificate of Incorporation or by-laws or comparable
organizational documents; (ii) authorize for issuance, issue, reissue, pledge,
sell, any stock of any class or any other securities, except for issuances of
capital stock of the subsidiaries to the Company or a wholly owned subsidiary of
the Company and the issuance of Shares pursuant to the exercise of Options
outstanding as of the date of the Merger Agreement; (iii) declare, set aside or
pay any dividend or other distribution in respect of any class or series of its
capital stock other than between any of the Company and any of its wholly owned
subsidiaries; (iv) split, combine, subdivide, reclassify or redeem, purchase or
otherwise acquire, or propose to redeem, purchase or otherwise acquire, any
Shares or any other capital stock of the Company; (v) make any loans, advances
or capital contributions to, or investments in, any other person in excess of
$500,000, except for loans, advances, capital contributions or investments
between any subsidiary of the Company and the Company or another wholly owned
subsidiary of the Company; (vi) fail to (a) maintain the real property in a
manner consistent with past practice, subject to certain specified exceptions,
(b) pay when due all taxes, water and sewer rents, assessments and insurance
premiums affecting the real property and (c) timely comply with the terms and
provisions of all leases, contracts and agreements relating to or affecting the
real property and the use and operation thereof, other than such failures that
would not have a material adverse effect on the Company; (vii) enter into,
establish, adopt, amend or renew any material employment, consulting, severance
or similar agreements or arrangements with any director, officer or employee;
grant any salary or wage increase or establish, adopt, amend, or increase
benefits under, any pension, retirement, stock option, stock purchase, savings,
profit sharing, deferred compensation, consulting, welfare benefit contract,
plan or arrangement; (viii) enter into any material labor or collective
bargaining agreement, memorandum of understanding, grievance settlement or any
other agreement or commitment to or relating to any labor union other than in
the ordinary course of business consistent with past practice; (ix) take other
specified actions outside the ordinary course of business consistent with past
practice; (x) consummate its investment in Louisiana Generating LLC, or waive,
modify or terminate in any manner adverse to the Company its rights under the
joint development agreement, among the Company, Southern Electric International,
Inc. and NRG Energy Inc., in connection with Cajun Electric Power Cooperative,
Inc. (the "Joint Development Agreement"); (xi) waive, modify, amend or terminate
any confidentiality, standstill or other similar agreement to which the Company
or any of its subsidiaries is a party; or (xii) agree to take any action which
would violate the foregoing covenants.
 
    ACCESS TO INFORMATION.  The Company will give Parent and Purchaser and their
representatives reasonable access to all necessary information. Parent and
Purchaser have agreed to be bound by a Confidentiality Agreement dated March 6,
1998.
 
    REASONABLE EFFORTS; NOTICE OF CERTAIN DEVELOPMENTS.  Each of the parties
will use its reasonable efforts to take all actions and do all things necessary,
proper or advisable to consummate and make effective the transactions
contemplated by the Offer and the Merger Agreement. Each of the parties will
promptly inform the other party of any event or circumstance that is discovered
at any time before the Effective Time that should be set forth in an amendment
to the Schedule 14D-1 or Schedule 14D-9.
 
    PUBLIC ANNOUNCEMENTS.  Parent and Purchaser, on the one hand, and the
Company, on the other hand, will consult with each other before issuing any
press release or otherwise making any public statements with respect to the
transactions contemplated by the Merger Agreement except as required by
applicable law or by any rule or regulation of the NYSE.
 
                                       17
<PAGE>
    INDEMNIFICATION.  For a period not less than six years from the Effective
Time, (i) all existing rights of directors and officers to indemnification as
provided in the respective charters or by-laws of the Company and its
subsidiaries or in an agreement with the Company will remain in full force, and
(ii) in accordance with such rights, Parent will indemnify and hold harmless the
directors and officers of the Company and its subsidiaries from and against any
action, proceeding or investigation arising out of events occurring prior to,
and including, the Effective Time and will pay all reasonable expenses
(including legal and the cost of any investigation and preparation) incurred in
connection therewith.
 
    Parent will cause the Company to maintain in effect for six years after the
Effective Time, for the benefit of all current and former directors and officers
of the Company the coverage provided by the current directors' and officers'
liability insurance policies maintained by the Company; provided, however, that
(i) the Company will not be required to incur any annual premium in excess of
300% of the last annual premium paid prior to the date of the Merger Agreement
for all current directors' and officers' liability insurance policies maintained
by the Company and if the Company is unable to obtain the required insurance it
shall obtain as much comparable insurance as possible for an annual premium
equal to this maximum amount and (ii) the Company may substitute policies that
are not less advantageous.
 
    NOTIFICATION OF CERTAIN MATTERS.  The Company will give prompt notice to
Parent, and Parent will give prompt notice to the Company, as the case may be,
of (i) the occurrence or non-occurrence of any event which would be reasonably
likely to demonstrate that any representation or warranty contained in the
Merger Agreement was or is untrue or inaccurate or reasonably likely to cause
any material covenant, condition or agreement not to be satisfied in all
material respects and (ii) any failure of the Company, Parent or Purchaser, as
the case may be, to comply with or satisfy any covenant, condition or agreement
under the Merger Agreement in any material respect.
 
    NO SOLICITATION.  The Merger Agreement requires the Company immediately to
cease any existing activities, discussions and negotiations with any third
parties with respect to any inquiry, proposal or offer for any recapitalization,
merger, consolidation or other business combination involving the Company, or
acquisition of any capital stock (other than upon exercise of the Options which
are outstanding as of the date of the Merger Agreement) or any portion of the
assets (except for certain specified assets and acquisitions of assets in the
ordinary course of business consistent with past practice) of the Company and
its subsidiaries, or any combination of the foregoing (a "Competing
Transaction"). The Company will not, directly or indirectly, through any
officer, director, employee, representative or agent or any of its subsidiaries,
(i) solicit, initiate, encourage, facilitate, furnish or disclose non-public
information in furtherance of a Competing Transaction or negotiate with any
person for the purpose of facilitating any Competing Transaction provided that
prior to the purchase of the Shares by the Purchaser pursuant to the Offer, the
Company may furnish information to, and negotiate or otherwise engage in
discussions with, any party who makes a bona fide proposal regarding a Competing
Transaction which was not solicited by the Company after the date of the Merger
Agreement and which does not violate any standstill agreement if the Board of
Directors after consultation with its counsel determines in good faith that
failing to consider and cooperate with such other party regarding such Competing
Transaction would constitute a breach of the fiduciary duties of the Board to
the Company's stockholders under applicable law, and, provided further, that in
no event does the term "Competing Transaction" include a sale or other
disposition of any non-coal assets.
 
    The Company must immediately advise Parent in writing of the receipt,
directly or indirectly, of any inquiries, discussions, negotiations, or
proposals relating to a Competing Transaction, which becomes known to the
Company's Board of Directors during the term of the Merger Agreement. The
Company must keep Parent fully apprised of the status and terms of any proposal
relating to a Competing Transaction on a current basis.
 
    If, prior to the purchase of Shares by the Purchaser pursuant to the Offer,
the Company's Board of Directors after consultation with its financial and legal
advisors determines in good faith that any written
 
                                       18
<PAGE>
proposal from a third party for a Competing Transaction received after the date
of the Merger Agreement that was not solicited by the Company or any of its
subsidiaries in violation of the Merger Agreement is more favorable to the
stockholders of the Company from a financial point of view than the transactions
contemplated by the Merger Agreement and is in the best interest of the
stockholders of the Company, the Company may terminate the Merger Agreement at
any time prior to the purchase of Shares by Purchaser and enter into a letter of
intent, agreement-in-principle, acquisition agreement or other similar agreement
with respect to such Competing Transaction provided that, (i) the Company
provides written notice of such termination to Parent at least three full
business days prior to the effectiveness of such termination, (ii) the Company
delivers to Parent within five business days following such termination cash in
an amount equal to Parent's costs as estimated by Parent in good faith prior to
the date of such delivery but in no event to exceed $10,000,000 and the
Termination Fee described below, and (iii) the Company and the other party to
the Competing Transaction deliver a written acknowledgment that the Company and
such other party have irrevocably waived any right to contest any payments as
provided above.
 
CONDITIONS TO CONSUMMATION OF THE MERGER
 
    The obligations of the Company, Parent and Purchaser to consummate the
Merger are subject to the satisfaction or, if appropriate, waiver of the
following conditions:
 
    PURCHASE OF SHARES.  The Purchaser shall have accepted for payment and paid
for Shares pursuant to the Offer in accordance with the terms of the Merger
Agreement, provided that the condition shall be deemed satisfied as to Parent
and Purchaser if Purchaser fails to accept for payment or pay for Shares
pursuant to the Offer in violation of the terms of the Offer. All conditions to
the Offer, which are set forth in Annex I to the Merger Agreement, are
summarized in Section 13.
 
    NO INJUNCTIONS OR RESTRAINTS; ILLEGALITY.  No order or preliminary or
permanent injunction shall be entered in any action or proceeding before any
court, and no statute, rule, regulation, legislation, or order shall be enacted,
entered, enforced, amended or issued by any United States legislative body,
court, government or governmental, administrative or regulatory authority or
agency (other than the waiting period provisions of the HSR Act) which shall
remain in effect and which shall have the effect of (x) making illegal or
restraining or prohibiting the making of the Offer, the acceptance for payment
of, or payment for, the Shares by Parent, Purchaser or any other affiliate of
Parent, or the consummation of the Offer or the Merger or (y) imposing
limitations on the ability of Purchaser effectively to acquire or hold or
exercise full rights of ownership of the Shares, including, without limitation,
the right to vote the Shares on all matters properly presented to the
shareholders of the Company; provided, that Parent, to the extent provided in
the Merger Agreement, shall, if necessary to prevent the taking of such action,
or the enactment, enforcement, amendment, issuance or application of any
statute, rule, regulation, legislation, judgment, order or injunction, offer to
accept an order to divest such of the Company's or Parent's assets and
businesses as may be necessary to forestall such injunction or order and to hold
separate such assets and business pending such divestiture; (ii) no proceeding
brought by an administrative agency or commission or other domestic governmental
entity seeking any of the foregoing shall be pending; and (iii) no action or
proceeding shall be commenced following the date of the Merger Agreement and be
pending before any court which, if adversely determined, could reasonably be
expected to have a material adverse effect on the Company.
 
TERMINATION; AMENDMENTS; WAIVER
 
    TERMINATION. The Merger Agreement provides that at any time prior to the
Effective Time the Merger Agreement may be terminated and the Merger may be
abandoned: (i) by the mutual written consent of Parent and the Company; (ii) by
the Company if the Purchaser fails to commence the Offer in accordance with the
Merger Agreement or fails to purchase validly tendered Shares in violation of
the terms of the Offer or the Merger Agreement; (iii) by Parent or Company if
the Offer is terminated or withdrawn
 
                                       19
<PAGE>
without any Shares being purchased, provided that neither Parent nor the Company
may terminate the Merger Agreement if such party materially breached the Merger
Agreement, or in the case of Parent, if it or the Purchaser materially violated
the terms of the Offer; (iv) by Parent or the Company to the extent that
performance is prohibited, enjoined or otherwise materially restrained by any
final, non-appealable judgment, provided the party seeking to terminate the
Merger Agreement has used its reasonable efforts to remove such judgment; (v) by
Parent or the Company if (a) the Financing Condition shall be impossible to
satisfy by the end of the twentieth business day following commencement of the
Offer, or (b) any of the conditions to the Offer shall be impossible to satisfy
by the end of the thirtieth business day following commencement of the Offer
unless such circumstance results from the failure of the terminating party to
perform its obligations under the Merger Agreement, provided that the Company
may not terminate the Merger Agreement if Parent is willing to waive the
relevant condition (other than the Minimum Condition, which cannot be waived
without the consent of the Company); (vi) by Parent if, prior to the purchase of
Shares by Purchaser, the Company's Board of Directors withdraws or modifies in a
manner adverse to Parent, or refrains from making the Board Recommendation, or
publicly discloses its intention to change such recommendation, or fails to
reaffirm the Board Recommendation within five days of receipt from Parent or the
Purchaser of a request to so reaffirm the Board Recommendation; (vii) by the
Company prior to the purchase of Shares pursuant to the Offer, if the Board
after consultation with its financial and legal advisors determines in good
faith that any written proposal from a third party for a Competing Transaction
received after the date of the Merger Agreement that was not solicited by the
Company or any of its Subsidiaries or affiliates in violation of the Merger
Agreement is more favorable to the stockholders of the Company from a financial
point of view than the transactions contemplated by the Merger Agreement and is
in the best interest of the stockholders of the Company; (viii) by the Company
in the event of any breach of the covenants and/or representations and
warranties of Parent and Purchaser contained in the Merger Agreement which has a
material adverse effect on the consummation of the transactions contemplated by
the Merger Agreement; or (ix) by Parent, if any Stockholder who holds more than
five percent of the Shares breaches any of his, her or its obligations under
his, her or its Support Agreement, as defined below.
 
    EFFECT OF TERMINATION; FEES AND EXPENSES.  Purchaser must terminate the
Offer as soon as practicable following the termination of the Merger Agreement
for any reason. If the Merger Agreement is terminated as a result of (i) the
Company's Board of Directors withdrawing its recommendation or (ii) the
Company's Board of Directors entering into a Competing Transaction, the Company
will repay Parent in cash an amount equal to the aggregate amount of reasonable
documented expenses not to exceed $10,000,000 and a termination fee of
$18,000,000.
 
    AMENDMENT.  The Merger Agreement may be amended by the Company, Parent and
Purchaser in a writing signed on behalf of each of the parties; however, after
the purchase of Shares pursuant to the Offer, no amendment may be made to
decrease the Merger Consideration or which materially adversely affects the
rights of the shareholders without approval of such shareholders.
 
    EXTENSION; WAIVER.  Subject to approval by the Company's Board of Directors
in the manner described above under "Board Representation," at any time prior to
the Effective Time, the Company, on the one hand, and Parent and Purchaser, on
the other hand, may in writing (i) extend the time for the performance of any of
the obligations or other acts of the other party, (ii) waive any inaccuracies in
the representations and warranties of the other party or (iii) waive compliance
by the other party with any of the agreements or conditions contained in the
Merger Agreement.
 
SUPPORT AGREEMENTS
 
    As a condition to entering into the Merger Agreement and making the Offer,
Parent and Purchaser have required that Kinman Limited Partnership, Michael K.
Reilly, Chand B. Vyas, and Roland E. Casati (each, a "Stockholder" and,
together, the "Stockholders") enter into a Support Agreement (the "Support
Agreements") with the Company. Pursuant to the Support Agreements, each
Stockholder has
 
                                       20
<PAGE>
agreed to tender and not withdraw, pursuant to and in accordance with the terms
of the Offer, all of the Shares owned by such Stockholder (the "Owned Shares").
As of August 3, 1998, the Stockholders owned approximately 9,882,000 Shares in
the aggregate, or 33% of the outstanding Shares on a fully diluted basis before
any options have been tendered for cancellation.
 
    Pursuant to the Support Agreements, each Stockholder has agreed that, during
the time the Support Agreement is in effect, such Stockholder will not vote the
Owned Shares in favor of any Competing Transaction.
 
    The Support Agreements provide that, with certain exceptions, each
Stockholder will not (i) transfer, or consent to any transfer of, any or all of
the Owned Shares or any interest therein, (ii) enter into any contract, option
or other agreement or understanding with respect to any transfer of any or all
of the Owned Shares, (iii) grant any proxy, power-of-attorney or other
authorization in or with respect to the Owned Shares, (iv) deposit the Owned
Shares into a voting trust or enter into a voting agreement or arrangement with
respect to the Owned Shares or (v) take any other action that would in any way
restrict, limit or interfere with the performance of his obligations
contemplated by the Merger Agreement.
 
    The Support Agreements provide that each Stockholder will not, and will not
permit or authorize any of his affiliates to, solicit, participate in or
initiate discussions or negotiations with, or provide or disclose any
information to, any person or group (other than Parent, Purchaser or any of
their affiliates or representatives) concerning any Competing Transaction or
enter into any agreement, arrangement or understanding requiring the Company to
abandon the Merger. Each Stockholder agreed to promptly cease any existing
activities, discussions or negotiations with any parties with respect to any
Competing Transaction. Each Stockholder also agreed to waive any rights of
appraisal or rights to dissent from the Merger.
 
    Each Support Agreement and all rights and obligations of the parties
thereunder will terminate upon the earlier of the (i) Effective Time, (ii)
termination of the Merger Agreement, (iii) upon a change of the Board
Recommendation that would give Parent the right to terminate the Merger
Agreement, (iv) termination or withdrawal of the Offer by Parent or Purchaser,
(v) written notice of termination of the Support Agreement by the Company to the
Stockholder and (vi) Purchaser's purchase of the Owned Shares pursuant to the
Offer.
 
    The Company and each of the Stockholders have agreed that (i) neither of
them will amend, modify, supplement, terminate or in any other manner change
their respective rights and obligations under the Support Agreements in any
manner that will adversely effect the consummation of the Offer by Purchaser,
(ii) Parent and/or Purchaser may, in the event of a breach of the Support
Agreement by Stockholder, require the Company to exercise its rights under the
Support Agreement to obtain compliance therewith by the Stockholder, and (iii)
to the extent the Company does not comply with any demand by Parent and/or
Purchaser as contemplated by the preceding clause (ii), Parent and/or Purchaser
will have the right to seek damages from the Company for the Company's failure
to take the action contemplated by clause (ii).
 
SURVIVAL OF REPRESENTATIONS AND WARRANTIES
 
    The representations and warranties in the Merger Agreement shall not survive
beyond the Effective Time. The covenants and agreements in the Merger Agreement
shall survive in accordance with their respective terms, including, but not
limited to, the "Indemnification" paragraph above.
 
PLANS FOR THE COMPANY
 
    It is expected that, initially following the Offer and the Merger, the
business and operations of the Company will, except as set forth in this Offer
to Purchase, be continued by the Company substantially as they are currently
being conducted. Parent currently has no plans to change the Company's
management other than replacing certain senior executive officers. Following
consummation of the Merger,
 
                                       21
<PAGE>
however, Parent intends to conduct a review of the Company and its assets, its
corporate structure, operations, properties, management and personnel and
consider what, if any, changes would be desirable in light of the circumstances
which then exist. Such changes could include the acquisition or disposition of
assets or other changes in the Company's capitalization, dividend policy,
corporate structure, business, certificate of incorporation, bylaws, board of
directors or management.
 
GOVERNING LAW
 
    The Merger Agreement is governed by and construed in accordance with the
laws of the State of Delaware, without regard to the principles of conflict of
laws thereof.
 
11. SOURCE AND AMOUNT OF FUNDS
 
    Parent estimates that approximately $1.22 billion will be required to
acquire all of the Shares pursuant to the Offer and the Merger, to refinance
certain obligations of Parent and the Company, and to pay fees and expenses
related to the Offer and the Merger. An additional $130 million will be
available under a working credit facility. Parent expects to obtain these funds
from capital contributions from New Holdings, borrowings under an interim term
loan facility (the "Parent Bridge Loan Facility") and borrowings under a senior
secured credit facility (the "Senior Credit Facility"). New Holdings expects to
obtain the funds required to make a capital contribution to Parent from
borrowings under an interim term loan facility (the "New Holdings Bridge Loan
Facility" and together with the Purchaser Bridge Loan Facility, the "Bridge Loan
Facilities"). New Holdings and Parent have received a commitment letter dated
August 3, 1998 (the "Bridge Commitment Letter") from UBS AG, Stamford Branch
("UBS"), to provide the New Holdings Bridge Facility and the Purchaser Bridge
Loan Facility. Purchaser has received a commitment letter dated August 3, 1998
(the "Credit Facility Commitment Letter" and together with the Bridge Commitment
Letter, the "Commitment Letters") from UBS to provide the Senior Credit
Facility. The commitments and agreements of UBS under the Commitment Letters are
subject to customary conditions. The Committment Letters have been accepted and
the related committment fees have been paid by the Company.
 
    BRIDGE LOAN FACILITIES.  The New Holdings Bridge Loan Facility will consist
of a $100.0 million term loan that will mature one year from the closing date
and the Parent Bridge Loan Facility will consist of a $500.0 million term loan
that will mature one year from the closing date. Loans under the New Holdings
Bridge Loan Facility may be converted into a term loan with a maturity of eight
years after the closing date upon payment of a fee equal to 3.25% of the
accreted value of the initial amount of the loans thereunder and Loans under the
Parent Bridge Loan Facility may be converted into a term loan with a maturity of
eight years after the closing date upon payment of a fee equal to 2.75% of the
principal amount of the loans thereunder.
 
    Loans under the Bridge Loan Facilities may be prepaid at any time without
penalty. Once converted into a term loan, loans under the Bridge Loan Facilities
will be subject to prepayment restrictions and premiums. The Bridge Loan
Facilities will provide for mandatory prepayments with proceeds from the
issuance of additional debt or equity.
 
    The New Holdings Bridge Loan Facility will not accrue any cash interest, but
will accrete at the rate of 7.0% per annum, increasing by 0.50% for each 90 day
period any loans are outstanding, not to exceed 18.00% per annum. The Parent
Bridge Loan Facility will bear interest at the three month London Interbank
Offered Rate ("LIBOR") plus 4.75%, increasing 0.50% for each 90 day period any
loans are outstanding.
 
                                       22
<PAGE>
    The Bridge Loan Facilities will contain customary affirmative and negative
covenants, including, without limitation, restrictions on the ability of New
Holdings, Parent and their subsidiaries to incur additional indebtedness, pay
certain dividends and make certain other restricted payments and investments,
impose restrictions on the ability of the Purchaser's subsidiaries to pay
dividends or make certain payments to the Purchaser, create liens, enter into
transactions with affiliates, enter into transactions resulting in a change of
control, merge, consolidate or transfer substantially all of their respective
assets, and maintain certain financial ratios and meet other financial tests.
The Bridge Loan Facilities will contain customary events of default.
 
    SENIOR CREDIT FACILITY.   The Senior Credit Facility will consist of a Term
Loan A Facility in an aggregate principal amount of $150.0 million (the "Term
Loan A Facility"); (ii) a Term Loan B Facility in an aggregate principal amount
of $300.0 million (the "Term Loan B Facility" and together with the Term Loan A
Facility, the "Term Loan Facilities"); and (iii) a $300 million revolving credit
facility (the "Revolving Credit Facility" and together with the Term Loan
Facilities, the "Credit Facility"). The Term Loan A Facility will amortize on a
quarterly basis in amounts to be determined and will mature five years after the
closing date; the Term Loan B Facility will amortize on a quarterly basis, with
nominal amounts in the first five years and thereafter in amounts to be
determined and will mature seven years after the closing date. The Revolving
Credit Facility will be payable in its entirety seven years after the closing
date. The Revolving Credit Facility will be available for general corporate
purposes, including working capital.
 
    Loans under the Senior Credit Facility may be prepaid at any time without
penalty. The Senior Credit Facility will provide for customary mandatory
prepayments with a percentage of excess cash flow and with certain proceeds from
asset sales and certain proceeds from the issuance of additional debt or equity.
 
    Loans under the Term Loan A Facility and the Revolving Credit Facility will
initially bear interest, at the election of Purchaser, at either (i) 1.50% plus
the higher of (a) UBS's prime rate or (b) the federal funds rate plus 1/2% or
(ii) the LIBOR plus 2.50%. Loans under the Term Loan B Facility will initially
bear interest, at the election of Purchaser, at either (i) 1.75% plus the higher
of (a) UBS's prime rate or (b) the federal funds rate plus 1/2% or (ii) the
LIBOR plus 2.75%. After a period to be determined, spreads over LIBOR will be
adjusted in accordance with the financial performance of Parent.
 
    The obligations of Parent under the Senior Credit Facility will be secured
by substantially all assets of Parent and its subsidiaries (including the
Company after consummation of the Merger).
 
    The Senior Credit Facility will contain customary affirmative and negative
covenants, including, without limitation, restrictions on the ability of the
Parent and its subsidiaries to incur additional indebtedness, pay certain
dividends and make certain other restricted payments and investments, impose
restrictions on the ability of the Parent's subsidiaries to pay dividends or
make certain payments to Parent, create liens, enter into transactions with
affiliates, enter into transactions resulting in a change of control, merge,
consolidate or transfer substantially all of their respective assets and
maintain certain financial ratios and meet other financial tests (including, but
not limited to, interest coverage, minimum net worth, maximum capital
expenditures and maximum ratio of debt to earnings before income taxes,
depreciation, and amortization), in each case satisfactory to the Lender. The
Senior Credit Facility will contain customary events of default.
 
    It is anticipated that the indebtedness incurred through borrowings under
the Bridge Loan Facility and the Credit Facility will be repaid from funds
generated internally by Parent and its subsidiaries, including the Company and
its subsidiaries, and from other sources, which may include the proceeds of the
private or public sale of debt or equity securities or asset dispositions.
 
                                       23
<PAGE>
12. CERTAIN EFFECTS OF THE OFFER
 
    Following the consummation of the Offer, Purchaser will own at least 90% of
the outstanding Shares of the Company. As a result of such ownership, Purchaser
will have the ability to approve the Merger and adopt the Merger Agreement
without any action by the remaining stockholders of the Company. Purchaser
intends to so approve the Merger and adopt the Merger Agreement without any
action by the remaining stockholders of the Company.
 
    In the Merger, each remaining Share (other than Shares held by Parent,
Purchaser or the Company or by any holders of Shares who properly exercise their
appraisal rights) will be canceled and converted into the right to receive
$21.25 per Share in cash. Following the Merger, the Company will be a wholly
owned subsidiary of Parent.
 
    Promptly upon the purchase by Purchaser of Shares pursuant to the Offer and
from time to time thereafter, Purchaser will be entitled to designate at least a
number of directors on the Company's Board of Directors equal to the product of
(i) the total number of directors on the Company's Board of Directors and (ii)
Purchaser's percentage ownership of the outstanding Shares of the Company. The
Company will either increase the size of the Company's Board of Directors or
secure the resignation of the necessary number of directors to enable
Purchaser's designees to be elected to the Company's Board of Directors, and
will cause such designees to be elected to the Company's Board of Directors.
 
    Following the election or appointment of Purchaser's designees and before
the Effective Time, the Company will not amend or terminate the Merger
Agreement, extend the time for performance of any of the obligations or other
acts of Parent or Purchaser, waive any of the Company's rights under the Merger
Agreement, or take any other action if the amendment, termination, waiver or
action would have an adverse effect on the minority stockholders of the Company.
 
    As a result of the purchase of Shares by Purchaser in the Offer and the
consummation of the Merger, Parent will become the sole stockholder of the
Company, and the Shares will no longer meet the standards for continued listing
on the NYSE. In addition, Parent intends to terminate the registration on the
Shares under the Exchange Act upon the consummation of the Merger.
 
    The Shares are currently "margin securities," as such term is defined under
the rules of the Board of Governors of the Federal Reserve System (the "Federal
Reserve Board"), which has the effect, among other things, of allowing brokers
to extend credit on the collateral of such securities. Following the
consummation of the Offer, it is anticipated that the Shares will no longer
constitute "margin securities" for purposes of the margin regulations of the
Federal Reserve Board and will no longer be able to be used as collateral for
loans made by brokers.
 
13. CONDITIONS OF THE OFFER
 
    Notwithstanding any other provision of the Offer, the obligation of
Purchaser to accept for payment or pay for any Shares tendered pursuant to the
Offer shall be subject to (the following being referred to as the "Offer
Conditions") (i) the Minimum Condition, (ii) the Financing Condition, and (iii)
the occurrence of none of the following events at any time before payment for
any Shares:
 
    (a) (i) the waiting period applicable to the Offer or the Merger pursuant to
the provisions of the HSR Act and any applicable foreign or supranational
antitrust laws shall fail to have expired or to have been terminated, or (ii)
action by the Department of Justice or Federal Trade Commission or any foreign
or supranational agency or entity charged with enforcement of antitrust laws
that are applicable to the transactions contemplated hereby challenging or
seeking to enjoin the consummation of the Offer or the Merger shall have been
instituted and be pending;
 
    (b) (i) any order or preliminary or permanent injunction shall be entered in
any action or proceeding before any court or any statute, rule, regulation,
legislation, or order shall be enacted, entered, enforced,
 
                                       24
<PAGE>
amended or issued by any United States legislative body, court, government or
governmental, administrative or regulatory authority or agency (other than the
waiting period provisions of the HSR Act) which shall remain in effect and which
shall have the effect of (x) making illegal or restraining or prohibiting the
making of the Offer, the acceptance for payment of, or payment for, the Shares
by Parent, Purchaser or any other affiliate of Parent, or the consummation of
the Offer or the Merger or (y) imposing limitations on the ability of Purchaser
effectively to acquire or hold or exercise full rights of ownership of the
Shares, including, without limitation, the right to vote the Shares on all
matters properly presented to the stockholders of the Company; provided, that
Parent, to the extent provided in the Merger Agreement, shall, if necessary to
prevent the taking of such action, or the enactment, enforcement, amendment,
issuance or application of any statute, rule, regulation, legislation, judgment,
order or injunction, offer to accept an order to divest such of the Company's or
Parent's assets and businesses as may be necessary to forestall such injunction
or order and to hold separate such assets and business pending such divestiture;
(ii) any proceeding brought by an administrative agency or commission or other
domestic governmental entity seeking any of the foregoing shall be pending; or
(iii) any action or proceeding shall be commenced following the date of the
Merger Agreement and be pending before any court which, if adversely determined,
could reasonably be expected to have a material adverse effect on the Company;
 
    (c) the Company, Purchaser and Parent shall have agreed that the Offer or
the Merger Agreement be terminated, or the Merger Agreement shall have been
terminated in accordance with its terms;
 
    (d) the Company or any of its subsidiaries shall have breached one or more
of its representations and warranties set forth in the Merger Agreement or
failed to perform any of its obligations, covenants or agreements under the
Merger Agreement and such breaches or failures to perform shall in the aggregate
materially and adversely affect the ability of Parent to own or control the
Company, its equity securities and its assets;
 
    (e) any material adverse effect on the Company shall have occurred or be
occurring; or
 
    (f) the representations and warranties of the Company relating to the
capitalization of the Company and its subsidiaries and the Company's rights
under the Joint Development Agreement shall not be true and correct in all
material respects.
 
    The foregoing conditions are for the sole benefit of Parent and Purchaser
and may be asserted by Parent or Purchaser regardless of the circumstances
giving rise to any such condition or may be waived by Parent or Purchaser in
whole or in part at any time and from time to time in their reasonable
discretion. The failure by Parent or Purchaser at any time to exercise any of
the foregoing rights shall not be deemed a waiver of any such right, the waiver
of any such right with respect to particular facts or circumstances shall not be
deemed a waiver with respect to any other facts or circumstances, and each such
right shall be deemed an ongoing right that may be asserted at any time or from
time to time.
 
14. DIVIDENDS AND DISTRIBUTIONS
 
    The Merger Agreement provides that prior to the Effective Time, neither the
Company nor any of its subsidiaries, without the written consent of Parent or as
otherwise permitted by the Merger Agreement, will declare, set aside or pay any
dividend or other distribution (whether in cash, securities or property or any
combination thereof) in respect of any class or series of its capital stock
other than between any of the Company and any of its wholly owned subsidiaries,
or split, combine, subdivide, reclassify or redeem, purchase or otherwise
acquire, or propose to redeem, purchase or otherwise acquire, any Shares or any
other capital stock of the Company.
 
    If in violation of the Merger Agreement, the Company should (a) split,
combine or otherwise change the Shares or its capitalization, (b) acquire
currently outstanding securities or otherwise cause a reduction in the number of
outstanding Securities or (c) issue or sell additional securities, shares of any
other
 
                                       25
<PAGE>
class of capital stock, other voting securities or any securities convertible
into, or rights, warrants or options, conditional or otherwise, to acquire, any
of the foregoing, then subject to the provisions of Section 15 below, Purchaser,
in its sole discretion, may make such adjustments as it deems appropriate in the
Offer Price and other terms of the Offer, including, without limitation, the
number or type of securities offered to be purchased.
 
    If, during the term of the Merger Agreement, the Company should declare or
pay any cash dividend on the Shares or other distribution on the Shares, or
issue with respect to the Shares any additional Shares, shares of any other
class of capital stock, other voting securities or any securities or any
securities convertible into, or rights, warrants or options, conditional or
otherwise, to acquire, any of the foregoing, payable or distributable to
shareholders of record on a date prior to the transfer of the Shares purchased
pursuant to the Offer to Purchaser or its nominee or transferee on the Company's
stock transfer records, then, subject to the provisions of Section 15 below, (a)
the amount per Share paid pursuant to the Offer may, in the sole discretion of
Purchaser, be reduced by the amount of any such cash dividend or cash
distribution and (b) the whole of any such noncash dividend, distribution or
issuance to be received by the tendering shareholders will (i) be received and
held by the tendering shareholders for the account of Purchaser and will be
required to be promptly remitted and transferred by each tendering shareholder
to the Depositary for the account of Purchaser, accompanied by appropriate
documentation of transfer, or (ii) at the direction of Purchaser, be exercised
for the benefit of Purchaser, in which case the proceeds of such exercise will
promptly be remitted to Purchaser. Pending such remittance and subject to
applicable law, Purchaser will be entitled to all rights and privileges as owner
of any such noncash dividend, distribution, issuance or proceeds and may
withhold the entire Offer Price or deduct from the amount per Share paid
pursuant to the Offer the amount or value thereof, as determined by Purchaser in
its sole discretion.
 
    Pursuant to the terms of the Merger Agreement, the Company is prohibited
from taking any of the actions described in the two preceeding paragraphs and
nothing herein shall constitute a waiver by Purchaser or Parent of any of its
rights under the Merger Agreement or a limitation of remedies available to
Purchaser or Parent for any breach of the Merger Agreement, including
termination thereof.
 
15. CERTAIN LEGAL MATTERS; REGULATORY APPROVALS
 
  GENERAL
 
    Except as described below, Purchaser is not aware of any governmental
license or regulatory permit that appears to be material to the business of the
Company and its subsidiaries, taken as a whole, that might be adversely affected
by Purchaser's acquisition of the Company's Shares as contemplated herein or of
any approval or other action by any governmental, administrative or regulatory
authority or agency, domestic or foreign, that would be required for the
acquisition or ownership of Shares by Purchaser as contemplated herein. Should
any such approval or other action be required, Purchaser and Parent currently
contemplate that such approval or other action will be sought. Except as
otherwise expressly described in this Section 15, Purchaser does not presently
intend to delay the acceptance for payment of or payment for Shares tendered
pursuant to the Offer pending the outcome of any such matter. Purchaser is
unable to predict whether it may determine that it is required to delay the
acceptance for payment of or payment for Shares tendered pursuant to the Offer
pending the outcome of any such matter. There can be no assurance that any such
approval or other action, if needed, would be obtained or would be obtained
without substantial conditions or that the failure to obtain any such approval
or other action might not result in consequences adverse to the Company's
business or that certain parts of the Company's business might not have to be
disposed of, any of which could cause Purchaser to decline to accept for payment
or pay for any Shares tendered. See Section 13 for certain conditions to the
Offer.
 
                                       26
<PAGE>
  ANTITRUST
 
    Under the HSR Act and the rules that have been promulgated thereunder by the
Federal Trade Commission (the "FTC"), certain acquisition transactions may not
be consummated unless certain information has been furnished to the Antitrust
Division of the Department of Justice (the "Antitrust Division") and the FTC and
certain waiting period requirements have been satisfied. The purchase of Shares
of the Company by Purchaser pursuant to the Offer is subject to such
requirements.
 
    Under the provisions of the HSR Act applicable to the Offer, the purchase of
Shares under the Offer may be consummated following the expiration of a 15
calendar day waiting period following the filing by Parent of a Notification and
Report Form with respect to the Offer, unless Parent receives a request for
additional information or documentary material from the Antitrust Division or
the FTC or unless early termination of the waiting period is granted. Parent
expects that such filing will be made on or about August 7, 1998, in which event
such waiting period will expire at 11:59 p.m., New York City time, on or about
August 22, 1998. If, within their initial 15 calendar day waiting period, either
the Antitrust Division or the FTC requests additional information or documentary
material from Parent concerning the Offer, the waiting period will be extended
and would expire at 11:59 p.m., New York City time, on the tenth calendar day
after the date of substantial compliance by Parent with such request. Only one
extension of the waiting period pursuant to a request for additional information
is authorized by the HSR Act. Thereafter, such waiting period may be extended
only by court order or with the consent of Parent. Although the Company is
required to file certain information and documentary material with the Antitrust
Division and the FTC in connection with the Offer, neither the Company's failure
to make such filings nor a request to the Company from the Antitrust Division or
the FTC for additional information or documentary material will extend the
waiting period. In practice, complying with a request for additional information
or documentary material can take a significant amount of time. In addition, if
the Antitrust Division or the FTC raises substantive issues in connection with a
proposed transaction, the parties frequently engage in negotiations with the
relevant governmental agency concerning possible means of addressing those
issues and may agree to delay consummation of the transaction while such
negotiations continue.
 
    A request will be made pursuant to the HSR Act for early termination of the
waiting period applicable to the Offer at the time of filing by Parent of the
Notification and Report Form. There can be no assurance, however, that the 15
calendar day HSR Act waiting period will be terminated early. Shares of the
Company will not be accepted for payment or paid for pursuant to the Offer until
the expiration or earlier termination of the applicable waiting period under the
HSR Act. See Section 13. Any extension of the waiting period will not give rise
to any withdrawal rights not otherwise provided for by applicable law. See
Section 4. If Purchaser's acquisition of Shares is delayed pursuant to a request
by the Antitrust Division or the FTC for additional information or documentary
material pursuant to the HSR Act, the Offer may, but need not, be extended.
 
    The FTC and the Antitrust Division frequently scrutinize the legality under
the antitrust laws of transactions such as the acquisition of Shares of the
Company by Purchaser pursuant to the Offer. At any time before or after
Purchaser's purchase of Shares pursuant to the Offer, the Antitrust Division or
the FTC could take such action under the antitrust laws as it deems necessary or
desirable in the public interest, including seeking to enjoin the purchase of
Shares pursuant to the Offer or the consummation of the Merger or seeking the
divestiture of Shares acquired by Purchaser or the divestiture of substantial
assets of Parent or its subsidiaries, or the Company or its subsidiaries.
Private parties may also bring legal action under the antitrust laws under
certain circumstances. Purchaser does not believe that the consummation of the
Offer will result in a violation of any applicable antitrust laws. However,
there can be no assurance that a challenge to the Offer on antitrust grounds
will not be made or, if such a challenge is made, of the result thereof.
 
                                       27
<PAGE>
STATE TAKEOVER LAWS
 
    A number of states throughout the United States have enacted takeover
statutes that purport, in varying degrees, to be applicable to attempts to
acquire securities of corporations that are incorporated or have assets,
stockholders, executive offices or places of business in such states. In EDGAR
V. MITE CORP., the Supreme Court of the United States held that the Illinois
Business Takeover Act, which involved state securities laws, that made the
takeover of certain corporations more difficult, imposed a substantial burden on
interstate commerce and therefore was unconstitutional. In CTS CORP. V. DYNAMICS
CORP. OF AMERICA, however, the Supreme Court of the United States held that a
state may, as a matter of corporate law and, in particular, those laws
concerning corporate governance, constitutionally disqualify a potential
acquiror from voting on the affairs of a target corporation without prior
approval of the remaining stockholders, provided that such laws were applicable
only under certain conditions.
 
    Section 203 of the DGCL limits the ability of a Delaware corporation to
engage in business combinations with "interested stockholders" (defined as any
beneficial owner of 15% or more of the outstanding voting stock of the
corporation) unless, among other things, the corporation's board of directors
has given its prior approval to either the business combination or the
transaction which resulted in the stockholder becoming an interested
stockholder." Section 203 of the DGCL is inapplicable to the Offer and the
Merger.
 
    Based on information supplied by the Company and the Company's
representations in the Merger Agreement, Purchaser does not believe that any
state takeover statutes apply to the Offer or the Merger. Neither Purchaser nor
Parent has currently complied with any state takeover statute or regulation.
Purchaser reserves the right to challenge the applicability or validity of any
state law purportedly applicable to the Offer or the Merger and nothing in this
Offer to Purchase or any action taken in connection with the Offer or the Merger
is intended as a waiver of such right. If it is asserted that any state takeover
statute is applicable to the Offer or the Merger and an appropriate court does
not determine that it is inapplicable or invalid as applied to the Offer or the
Merger, Purchaser might be required to file certain information with, or to
receive approvals from, the relevant state authorities, and Purchaser might be
unable to accept for payment or pay for Shares tendered pursuant to the Offer,
or be delayed in consummating the Offer or the Merger. In such case, Purchaser
may not be obligated to accept for payment or pay for any Shares tendered
pursuant to the Offer.
 
16. FEES AND EXPENSES
 
    Warburg Dillon Read LLC is acting as Dealer Manager in connection with the
Offer and has provided certain financial advisory services in connection with
the acquisition of the Company. The Company will pay Warburg Dillon Read an
advisory fee in connection with the transactions contemplated by the Merger
Agreement as well as a fee in connection with its services as Dealer Manager.
The advisory fee will be payable upon consummation of the Offer and will equal
0.625% of the aggregate consideration paid in the Offer and the Merger. For its
services as Dealer Manager, Warburg Dillon Read will receive a transaction fee
of $1.5 million payable upon the expiration of the Offer, which amount will be
reduced by $1 million if the Offer and the Merger are consummated and the
advisory fee due thereon is paid. Parent has also agreed to reimburse Warburg
Dillon Read for all reasonable out-of-pocket expenses incurred by Warburg Dillon
Read, including the reasonable fees and expenses of legal counsel, and to
indemnify Warburg Dillon Read against certain liabilities and expenses in
connection with its engagement, including certain liabilities under the federal
securities laws. Warburg Dillon Read has from time to time, and continues to,
render various investment banking services to Parent and its affiliates, for
which it is paid customary fees.
 
    Warburg Dillon Read LLC is a subsidiary of UBS AG, which is providing the
Senior Credit Facility and the Bridge Loan Facilities. Parent will pay UBS
certain fees, receive certain expenses, and provide certain indemnities, all of
which Parent believes to be customary for commitments of this type.
 
                                       28
<PAGE>
    Purchaser has retained MacKenzie Partners, Inc. to act as the Information
Agent, and IBJ Schroder Bank & Trust Company to act as the Depositary, in
connection with the Offer. The Information Agent may contact holders of Shares
by mail, telephone, telex, telegraph and personal interview and may request
brokers, dealers and other nominee shareholders to forward the Offer materials
to beneficial owners. Each of the Information Agent and the Depositary will
receive reasonable and customary compensation for their respective services,
will be reimbursed for certain reasonable out-of-pocket expenses and will be
indemnified against certain liabilities and expenses in connection with the
Offer, including certain liabilities under the federal securities laws.
 
    Except as set forth above, Purchaser will not pay any fees or commissions to
any broker or dealer or other person for soliciting tenders of Shares pursuant
to the Offer. Brokers, dealers, commercial banks and trust companies (including
the Dealer Manager) will, upon request, be reimbursed by Purchaser for customary
mailing and handling expenses incurred by them in forwarding the Offer materials
to their customers.
 
17. MISCELLANEOUS
 
    Purchaser is not aware of any state where the making of the Offer is
prohibited by administrative or judicial action pursuant to any valid state
statute. If Purchaser becomes aware of any valid state statute prohibiting the
making of the Offer or the acceptance of Shares pursuant thereto, Purchaser will
make a good faith effort to comply with such state statute. If, after such good
faith effort, Purchaser cannot comply with such state statute, the Offer will
not be made to (nor will tenders be accepted from or on behalf of) the holders
of Shares in such state. In any jurisdiction where the securities, blue sky or
other laws require the Offer to be made by a licensed broker or dealer, the
Offer will be deemed to be made on behalf of Purchaser by the Dealer Manager or
one or more registered brokers or dealers that are licensed under the laws of
such jurisdiction.
 
    Parent and Purchaser have filed with the Commission the Schedule 14D-1
pursuant to Rule 14d-3 under the Exchange Act containing certain additional
information with respect to the Offer. Such Schedule and any amendments thereto,
including exhibits, may be examined and copies may be obtained from the
principal office of the Commission in the manner set forth in Section 7 (except
that they will not be available at the regional offices of the Commission).
 
    NO PERSON HAS BEEN AUTHORIZED TO GIVE ANY INFORMATION OR MAKE ANY
REPRESENTATION ON BEHALF OF PURCHASER OR PARENT NOT CONTAINED IN THIS OFFER TO
PURCHASE OR IN THE LETTER OF TRANSMITTAL AND, IF GIVEN OR MADE, SUCH INFORMATION
OR REPRESENTATIONS MUST NOT BE RELIED UPON AS HAVING BEEN AUTHORIZED.
 
                                                 ZEIGLER ACQUISITION CORPORATION
 
August 5, 1998
 
                                       29
<PAGE>
                                                                      SCHEDULE I
 
            DIRECTORS AND EXECUTIVE OFFICERS OF PARENT AND PURCHASER
 
A.  DIRECTORS AND EXECUTIVE OFFICERS OF PARENT
 
    The following table sets forth the name, present principal occupation or
employment and material occupation, positions, offices or employment for the
past five years of each director and executive officer of Parent. Unless
otherwise indicated below, the address of each director and officer is 1500
North Big Run Road, Ashland, Kentucky 41102 and each such person is a citizen of
the United States.
 
<TABLE>
<CAPTION>
                                                                PRESENT PRINCIPAL OCCUPATION
                                                                 OF EMPLOYMENT AND FIVE-YEAR
NAME                                                                 EMPLOYMENT HISTORY
- ------------------------------------------  ---------------------------------------------------------------------
<S>                                         <C>
Larry Addington...........................  Mr. Addington has been a director of Parent since its organization
                                            and has substantial experience in the operation of coal mining
                                            ventures. His first mining company, Addington Brothers Mining
                                            Company, began mining coal in eastern Kentucky in 1972 and was sold
                                            to Ashland Oil in 1976. In 1978, Larry Addington formed Pyramid,
                                            which mined coal in western Kentucky and was sold to First
                                            Mississippi in 1981. In 1984, Larry Addington formed Addington
                                            Resources, Inc. which became a public company in 1987, and which
                                            primarily conducted coal mining and integrated solid waste disposal
                                            operations. Larry Addington is the brother of Robert and Stephen
                                            Addington, who are directors of Parent and Purchaser.
Don Brown.................................  Mr. Brown, President and Chief Executive Officer and a director of
                                            Parent since September 1997, has worked in the coal industry since
                                            1968, and has extensive experience in all phases of coal mining
                                            operations. Previously, Mr. Brown served as President of Cyprus Coal
                                            Company from 1987 to 1993, as President of Cyprus Amax Coal Company
                                            from 1993 to 1995 and as Chief Executive Officer of International
                                            Executive Service, LLC from 1995 to 1997.
Kevin Crutchfield.........................  Mr. Crutchfield, who joined Parent as Chief Operating Officer on July
                                            30, 1998, has worked in the coal industry for 15 years. From 1995
                                            until his employment by the Company, he served in various capacities
                                            for Cyprus Amax Coal Company, including President and Chairman of
                                            Cyprus Australia Coal Company. From 1993 to 1995, he worked for
                                            Pittston Coal Company and its subsidiaries as Vice President of
                                            Mining Operations.
Robert Addington..........................  Mr. Addington, Senior Vice President--Eastern Operations and a
                                            director of Parent, has been involved in the coal mining business
                                            since 1970. With Larry Addington and Bruce Addington, he founded
                                            Addington Brothers Mining, which was sold to Ashland Oil in 1976. He
                                            served as an officer and director of Addington Resources from 1986
                                            until 1995.
John Baum.................................  Mr. Baum, Chief Financial Officer, has been involved in the coal
                                            industry since 1981, and was self-employed as a general consultant
                                            from June 1995 until his employment by Parent in November 1997. Prior
                                            to June 1995, Mr. Baum was employed by Cyprus Amax Coal Company as
                                            Chief Financial Officer of its Australian operations.
</TABLE>
 
                                      I-1
<PAGE>
<TABLE>
<CAPTION>
                                                                PRESENT PRINCIPAL OCCUPATION
                                                                 OF EMPLOYMENT AND FIVE-YEAR
NAME                                                                 EMPLOYMENT HISTORY
- ------------------------------------------  ---------------------------------------------------------------------
<S>                                         <C>
Marc Merritt..............................  Marc Merritt, Senior Vice President--Sales and Marketing, has worked
                                            in the coal industry for 21 years. From 1986 until 1994, he was a
                                            sales manager for Addington, Inc., and from 1994 until 1997, he was
                                            the Executive Vice President--Coal Sales for Pittston Coal Sales
                                            Corp. From 1997 until his employment by the Company, he was President
                                            of M&M Management, Inc., a coal industry consulting company.
James Morris..............................  Senior Vice President--Technical Services and Business Development,
                                            joined AEI in January 1998 and brought with him over twenty years of
                                            experience in mining, development and technical expertise. Prior to
                                            joining AEI, Mr. Morris served as President of Valucomm, Inc., a coal
                                            industry consulting firm, since 1994. Previous to that, Mr. Morris
                                            served as Executive Vice President and Chief Operating Officer for
                                            Pen Coal Company from 1990 to 1993, and from 1979 through 1990 served
                                            in various management and technical roles with Cyprus Minerals
                                            Company. From 1971 through 1978, Mr. Morris held various mine
                                            management positions with Anschutz Coal Corporation, CF&I Steel
                                            Corporation and Peabody Corporation.
Keith Sieber..............................  Mr. Sieber, Vice President--Western Operations, has worked in the
                                            coal industry for more than 20 years, and was employed in the same
                                            position by Cyprus Amax until he began his employment with Parent.
Victor Grubb..............................  Mr. Grubb, Treasurer/Controller, worked for Addington Resources from
                                            1989 to 1995, and has been the Chief Financial Officer of Addington
                                            Enterprises since 1995. He has a degree from Morehead State
                                            University in Business Administration with an emphasis in Accounting.
John Lynch................................  Mr. Lynch, Vice President--Supply/Maintenance and Secretary, has
                                            worked for various Addington-affiliated companies since 1983. He is
                                            currently the Vice President and Secretary of Addington Enterprises,
                                            and the President of Mining Machinery, Inc. ("MMI").
Stephen Addington.........................  Mr. Addington, a director of Parent, was the Regional Manager of
                                            southern Ohio and northeastern Kentucky surface coal mines for a
                                            subsidiary of Addington Resources from 1990 until 1992. From 1992
                                            until 1995, he was the Vice President of Operations for Addington
                                            Environmental, Inc., and presently is a Division Manager of Tennessee
                                            Mining an a consultant to Kindill Mining , Inc.
Stonie Barker.............................  Mr. Barker, a director, has been involved in the coal mining business
                                            since 1951. He has served as President, Chief Executive Officer and
                                            Chairman of the Board of Island Creek Coal Company, Executive Vice
                                            President of Occidental Petroleum Corporation, and is currently
                                            President of the Executive Energy Company, and a director of Kaiser
                                            Steel Corporation.
Robert Anderson, Jr.......................  Mr. Anderson, a director since August 1998, has over 45 years of
                                            experience in the coal industry. He has been Chairman of the Board of
                                            Directors of Centennial Resources, which mines and markets coal,
                                            since 1995. From 1976 until 1995, Mr. Anderson served in various
                                            senior executive capacities, including as President and Vice Chairman
                                            of the Board, with ANDALEX Resources, Inc., which mines and markets
                                            coal.
</TABLE>
 
                                      I-2
<PAGE>
B.  DIRECTORS AND EXECUTIVE OFFICERS OF PURCHASER
 
    The following table sets forth the name, business address, present principal
occupation or employment and material occupations, positions, offices or
employment for the past five years of each director and executive officer of
Purchaser. Unless otherwise indicated below, the address of each director and
officer is: 1500 North Big Run Road, Ashland, Kentucky 41102 and each such
person is a citizen of the United States.
 
<TABLE>
<CAPTION>
                                                                        PRESENT PRINCIPAL OCCUPATION
                                                                        OF EMPLOYMENT AND FIVE-YEAR
NAME                                                                         EMPLOYMENT HISTORY
- --------------------------------------------------------  --------------------------------------------------------
<S>                                                       <C>
Larry Addington.........................................  Director. See Schedule 1A.
 
Don Brown...............................................  President. See Schedule 1A.
 
Kevin Crutchfield.......................................  Chief Operating Officer. See Schedule 1A.
 
Robert Addington........................................  Director. See Schedule 1A.
 
John Baum...............................................  Chief Financial Officer. See Schedule 1A.
 
Marc Merritt............................................  Senior Vice President. See Schedule 1A.
 
Jim Morris..............................................  Senior Vice President. See Schedule 1A.
 
Keith Sieber............................................  Vice President. See Schedule 1A.
 
Victor Grubb............................................  Treasurer. See Schedule 1A.
 
John Lynch..............................................  Secretary. See Schedule 1A.
 
Stephen Addington.......................................  Director. See Schedule 1A.
 
Stonie Barker...........................................  Director. See Schedule 1A.
 
Robert Anderson, Jr.....................................  Director. See Schedule 1A.
</TABLE>
 
                                      I-3
<PAGE>
                        THE DEPOSITARY FOR THE OFFER IS:
                       IBJ SCHRODER BANK & TRUST COMPANY
 
<TABLE>
<S>                               <C>                               <C>
            By Mail:                 By Facsimile Transmission:      By Hand or Overnight Courier:
   IBJ Schroder Bank & Trust               (212) 858-2611              IBJ Schroder Bank & Trust
            Company                                                             Company
          P.O. Box 84                                                       One State Street
     Bowling Green Station                   To Confirm                 New York, New York 10004
 New York, New York 10274-0084      Facsimile Transmissions Call      Attn: Securities Processing
Attn: Reorganization Operations            (212) 858-2103                        Window
           Department
</TABLE>
 
Questions and requests for assistance may be directed to the Information Agent
or the Dealer Manager at their respective addresses and telephone numbers listed
below. Additional copies of this Offer to Purchase, the Letter of Transmittal
and other tender offer materials may be obtained from the Information Agent as
set forth below and will be furnished promptly at Purchaser's expense. You may
also contact the Dealer Manager or your broker, dealer, commercial bank, trust
company or other nominee for assistance concerning the Offer.
 
                    THE INFORMATION AGENT FOR THE OFFER IS:
 
                         [MACKENZIE PARTNERS,INC. LOGO]
 
                                156 Fifth Avenue
                            New York, New York 10010
                         (212) 929-5500 (Call Collect)
 
                                       or
 
                         CALL TOLL FREE: 1-800-322-2885
 
                      THE DEALER MANAGER FOR THE OFFER IS:
 
                            WARBURG DILLON READ LLC
 
                               535 Madison Avenue
 
                            New York, New York 10022
 
                                 (212) 906-7836

<PAGE>
                             LETTER OF TRANSMITTAL
                        TO TENDER SHARES OF COMMON STOCK
                                       OF
                          ZEIGLER COAL HOLDING COMPANY
             PURSUANT TO THE OFFER TO PURCHASE DATED AUGUST 5, 1998
                                       OF
                        ZEIGLER ACQUISITION CORPORATION,
                          A WHOLLY OWNED SUBSIDIARY OF
                              AEI RESOURCES, INC.
- -----------------------------------------------------------------------------
    THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK CITY
TIME, ON TUESDAY, SEPTEMBER 1, 1998, UNLESS THE OFFER IS EXTENDED.
- --------------------------------------------------------------------------------
                        The Depositary for the Offer is:
                       IBJ SCHRODER BANK & TRUST COMPANY
 
<TABLE>
<S>                                   <C>                                   <C>
              BY MAIL:                           BY FACSIMILE:                  BY HAND/OVERNIGHT DELIVERY:
            P.O. Box 84                          (212) 858-2611                       One State Street
       Bowling Green Station                                                         New York, NY 10004
      New York, NY 10274-0084           CONFIRM FACSIMILE BY TELEPHONE:                  Attention:
  Attention: Reorganization Dept.                (212) 858-2103              Securities Processing Window, SC-1
</TABLE>
 
    This Letter of Transmittal is to be used either if certificates for Shares
(as defined below) are to be forwarded herewith or if tender of Shares is to be
made by book-entry transfer to the account maintained by the Depositary at The
Depository Trust Company (the "Book-Entry Transfer Facility") pursuant to the
procedures set forth in Section 3 of the Offer to Purchase (as defined below).
Shareholders who tender Shares by book-entry transfer are referred to herein as
"Book-Entry Shareholders" and other shareholders are referred to herein as
"Certificate Shareholders." DELIVERY OF DOCUMENTS TO A BOOK-ENTRY TRANSFER
FACILITY DOES NOT CONSTITUTE DELIVERY TO THE DEPOSITARY.
 
    Shareholders whose certificates for Shares are not immediately available or
who cannot deliver their certificates (or who cannot comply with the book-entry
transfer procedures on a timely basis) and all other documents required hereby
to the Depositary on or prior to the Expiration Date (as defined in the Offer to
Purchase) must tender their Shares according to the guaranteed delivery
procedures set forth in Section 3 of the Offer to Purchase. See Instruction 2.
 
    IMPORTANT: THIS LETTER OF TRANSMITTAL OR FACSIMILE COPY HEREOF (TOGETHER
WITH CERTIFICATES OR CONFIRMATION OF BOOK-ENTRY TRANSFER AND ALL OTHER REQUIRED
DOCUMENTS) OR THE NOTICE OF GUARANTEED DELIVERY FOR SHARES, MUST BE RECEIVED BY
THE DEPOSITARY PRIOR TO THE EXPIRATION DATE. DELIVERY OF THIS INSTRUMENT TO AN
ADDRESS OTHER THAN AS SET FORTH ABOVE, OR TRANSMISSION OF INSTRUCTIONS VIA
FACSIMILE OR TELEX OTHER THAN AS SET FORTH ABOVE WILL NOT CONSTITUTE A VALID
DELIVERY.
<TABLE>
<CAPTION>
- ---------------
                                                DESCRIPTION OF SHARES TENDERED
                                                  (SEE INSTRUCTIONS 2 AND 4)
 ------------
             CERTIFICATE(S) TENDERED                            NAMES(S) AND ADDRESS(ES) OF REGISTERED HOLDER(S)
  (ATTACH ADDITIONAL SIGNED LIST, IF NECESSARY)                            (PLEASE FILL IN, IF BLANK)
<C>              <C>              <C>              <S>
- ---------------
 
<CAPTION>
                 TOTAL NUMBER OF
                     SHARES          NUMBER OF
 CERTIFICATE*    REPRESENTED BY       SHARES
  NUMBER(S)*     CERTIFICATE(S)*    TENDERED**
<C>              <C>              <C>              <S>
- ---------------
 
- ---------------
 
- ---------------
 
- ---------------
 
- ---------------
 
- ---------------
 
- ---------------
 
- ---------------
 TOTAL SHARES
- ---------------
*   Need not be completed by Book-Entry Shareholders.
**  Unless otherwise indicated, it will be assumed that all Shares evidenced by any certificate(s) delivered to the Depositary
    are being tendered. See Instruction 4.
/ / CHECK HERE IF TENDERED SHARES ARE BEING DELIVERED PURSUANT TO A NOTICE GUARANTEED DELIVERY FOR SHARES PREVIOUSLY SENT TO
    THE DEPOSITARY AND COMPLETE THE FOLLOWING:
Name(s) of Registered Holder(s)
 -------------
</TABLE>
 
              PLEASE READ THE ACCOMPANYING INSTRUCTIONS CAREFULLY
<PAGE>
Ladies and Gentlemen:
 
    The undersigned hereby tenders to Zeigler Acquisition Corporation (the
"Purchaser"), a Delaware corporation and a wholly owned subsidiary of AEI
Resources, Inc. (the "Parent"), a Delaware corporation, the below-described
shares of common stock, par value $.01 per share (the "Shares"), of Zeigler Coal
Holding Company (the "Company"), a Delaware corporation, pursuant to Purchaser's
offer to purchase all of the outstanding Shares at a price of $21.25 per Share,
net to the seller in cash and without interest thereon, upon the terms and
subject to the conditions set forth in the Offer to Purchase, dated August 5,
1998 (the "Offer to Purchase"), receipt of which is hereby acknowledged, and in
this Letter of Transmittal (which, together with any amendments or supplements
thereto, collectively constitute the "Offer").
 
    Upon the terms and subject to the conditions of the Offer, and subject to,
and effective upon, acceptance for payment of, and payment for, the Shares
tendered herewith in accordance with the terms of the Offer, the undersigned
hereby sells, assigns and transfers to, or upon the order of, Purchaser all
right, title and interest in and to all of the Shares that are being tendered
hereby (and any and all non-cash dividends, distributions, rights, other Shares
and other securities issuable in respect thereof on or after August 5, 1998),
and irrevocably constitutes and appoints the Depositary the true and lawful
agent and attorney-in-fact of the undersigned with respect to such Shares (and
any and all such non-cash dividends, distributions, rights, other Shares and
other securities) with full power of substitution (such power of attorney being
deemed to be an irrevocable power coupled with an interest) to (i) deliver
certificates for such Shares (and any and all such non-cash dividends,
distributions, rights, other Shares and other securities) or transfer ownership
of such Shares (and any and all such non-cash dividends, distributions, rights,
other Shares and other securities) on the account books maintained by the
Book-Entry Transfer Facility, together, in either such case, with all
accompanying evidence of transfer and authenticity, to or upon the order of
Purchaser upon receipt by the Depositary, as the undersigned's agent, of the
purchase price, (ii) present such Shares (and any and all such non-cash
dividends, distributions, rights, other Shares and other securities) for
transfer on the books of the Company and (iii) receive all benefits (including
all dividends or distributions resulting from any stock split, combination, or
exchange of Shares) and otherwise exercise all rights of beneficial ownership of
such Shares (and any and all such non-cash dividends, distributions, rights,
other Shares and other securities) all in accordance with the terms of the
Offer.
 
    The undersigned irrevocably appoints Purchaser and any other designees of
Purchaser, as the attorney-in-fact and proxy of the undersigned, with full power
of substitution, to exercise all voting and other rights with respect to any
Shares tendered by the shareholder and accepted for payment by Purchaser (and
any and all non-cash dividends, distributions, rights, other Shares and other
securities issued or issuable in respect of such Shares on or after August 5,
1998). Any such power of attorney and proxy is coupled with an interest in the
tendered Shares and is irrevocable and is granted in consideration of, and is
effective upon, Purchaser's written notice to the Depositary of its acceptance
for payment of such Shares in accordance with the terms of the Offer. Upon
acceptance for payment pursuant to the Offer, all prior proxies given by the
shareholder with respect to such Shares and other securities will, without
further action, be revoked, and no subsequent proxies may be given, and if
given, will not be effective. Purchaser and its designees will, with respect to
the Shares and other securities, be empowered to exercise all voting and other
rights of the shareholder as they, in their sole discretion, may deem proper at
any annual, special or adjourned meeting of the Company's shareholders or by
written consent or otherwise.
 
    The undersigned hereby represents and warrants that the undersigned has full
power and authority to tender, sell, assign and transfer the Shares tendered
hereby (and any and all non-cash dividends, distributions, rights, other Shares
and other securities issued or issuable in respect of such Shares on or after
August 5, 1998) and that, when the same are accepted for payment and paid for by
Purchaser, Purchaser will acquire good, marketable and unencumbered title
thereto, free and clear of all liens, restrictions, charges, claims and
encumbrances and the same will not be subject to any adverse claim. The
undersigned, upon request, will execute and deliver any additional documents
deemed by the Depositary or Purchaser to be necessary or desirable to complete
the sale, assignment and transfer of the Shares tendered hereby. In addition,
the undersigned shall promptly remit and transfer to the Depositary for the
account of Purchaser the whole of any non-cash dividend, distribution or right
issued to the undersigned on or after August 5, 1998, in respect of the Shares
tendered hereby, accompanied by appropriate
 
                                       2
<PAGE>
documentation of transfer. Pending such remittance, Purchaser shall be entitled
to all rights and privileges as owner of any such non-cash dividend,
distribution or right and may withhold the entire purchase price or deduct from
the purchase price the amount or value thereof, as determined by Purchaser in
its sole discretion. Purchaser reserves the right to require that, in order for
shares to be deemed validly tendered, immediately upon Purchaser's acceptance
for payment of such Shares, Purchaser must be able to exercise full voting
rights with respect to such Shares (including voting at any annual, special or
adjourned meeting of the Company's shareholders, or by written consent or
otherwise).
 
    All authority conferred or agreed to be conferred in this Letter of
Transmittal shall not be affected by, and shall survive the death or incapacity
of the undersigned and any obligation of the undersigned hereunder shall be
binding upon the heirs, legal representatives, successors, assigns, executors,
administrators and trustees in bankruptcy of the undersigned. Except as stated
in the Offer to Purchase, tenders of Shares are irrevocable.
 
    The undersigned understands that the valid tender of Shares (and acceptance
for payment of such Shares) pursuant to any of the procedures described in "The
Tender Offer--3. Procedure for Tendering Shares" of the Offer to Purchase and in
the instructions hereto will constitute a binding agreement between the
undersigned and Purchaser upon the terms and subject to the conditions of the
Offer, including the undersigned's representation and warranty that such
undersigned owns the Shares being tendered.
 
    Unless otherwise indicated herein under "Special Payment Instructions,"
please issue the check for the purchase price and/or return any certificates for
any Shares not tendered or accepted for payment in the name(s) of the registered
holder(s) appearing under "Description of Shares Tendered." Similarly, unless
otherwise indicated under "Special Delivery Instructions," please mail the check
for the purchase price for any Shares purchased and/or return any certificates
for any Shares not tendered or accepted for payment (and accompanying documents,
as appropriate) to the registered holder(s) at the address(es) appearing under
"Description of Shares Tendered." In the event that either the "Special Delivery
Instructions" or the "Special Payment Instructions" are completed, please issue
the check for the purchase price and/or return any certificates for Shares not
tendered or accepted for payment in the name of, and deliver said check and/or
return such certificates to, the person or persons so indicated. Book-entry
Shareholders delivering Shares by book-entry transfer may request that any
Shares not accepted for payment be returned by crediting such account maintained
at the Book-Entry Transfer Facility by making an appropriate entry under
"Special Payment Instructions." The undersigned recognizes that Purchaser has no
obligation pursuant to the Special Payment Instructions to transfer any Shares
from the name(s) of the registered holder(s) thereof if Purchaser does not
accept for payment any of such Shares so tendered.
 
                                  INSTRUCTIONS
               FORMING PART OF TERMS AND CONDITIONS OF THE OFFER
 
    1.  GUARANTEE OF SIGNATURES.  Except as otherwise provided below, all
signatures on this Letter of Transmittal must be guaranteed by a financial
institution (including most banks, savings and loan associations and brokerage
houses) which is a participant in the Securities Transfer Agents Medallion
Program, the New York Stock Exchange Medallion Signature Program, or the Stock
Exchange Medallion Program (each of the foregoing constituting an "Eligible
Institution"). Signatures on this Letter of Transmittal need not be guaranteed
(a) if this Letter of Transmittal is signed by the registered holder(s) of the
Shares (which term, for purposes of this document, shall include any participant
in one of the Book-Entry Transfer Facilities whose name appears on a security
position listing as the owner of Shares) tendered herewith and such holder(s)
has (have) not completed the instruction entitled "Special Payment Instruments"
and/or "Special Delivery Instructions" on this Letter of Transmittal or (b) if
such Shares are tendered for the account of an Eligible Institution. In all
other cases, all signatures on this Letter of Transmittal must be guaranteed by
an Eligible Institution. See Instruction 5.
 
    2.  DELIVERY OF LETTER OF TRANSMITTAL AND CERTIFICATES.  This Letter of
Transmittal is to be completed by shareholders either if certificates are to be
forwarded herewith or if tenders are to be made pursuant to the procedure for
delivery by book-entry transfer set forth in "The Tender Offer--3. Procedure for
Tendering Shares" of the Offer to Purchase. For a shareholder validly to tender
Shares, certificates for all
 
                                       3
<PAGE>
physically tendered Shares or any Book-Entry Confirmation (as defined in the
Offer to Purchase), as the case may be, as well as a properly completed and duly
executed Letter of Transmittal must be received by the Depositary at one of its
addresses set forth herein prior to the Expiration Date (as defined in the Offer
to Purchase), or the tendering shareholder must comply with the guaranteed
delivery procedures set forth below and in "The Tender Offer--3. Procedure for
Tendering Shares" of the Offer to Purchase.
 
    Shareholders whose certificates for Shares are not immediately available or
who cannot deliver their certificates and all other required documents to the
Depositary or complete the procedure for book-entry transfer prior to the
Expiration Date may tender their Shares by properly completing and duly
executing the Notice of Guaranteed Delivery for Shares pursuant to the
guaranteed delivery procedures set forth in "The Tender Offer--3. Procedure for
Tendering Shares" of the Offer to Purchase. Pursuant to such procedures, (i)
such tender must be made by or through an Eligible Institution, (ii) a properly
completed and duly executed Notice of Guaranteed Delivery for Shares
substantially in the form provided by Purchaser must be received by the
Depositary prior to the Expiration Date and (iii) the certificates (or a
book-entry transfer confirmation) representing all tendered Shares, in proper
form for transfer, in each case together with this Letter of Transmittal (or a
facsimile thereof) properly completed and duly executed, with any required
signature guarantees (or, in the case of a book-entry transfer, an Agent's
Message) and any other documents required by this Letter of Transmittal are
received by the Depositary within three New York Stock Exchange ("NYSE") trading
days after the date of execution of such Notice of Guaranteed Delivery, all as
provided in "The Tender Offer--3. Procedure for Tendering Shares" of the Offer
to Purchase.
 
    THE METHOD OF DELIVERY OF CERTIFICATES FOR SHARES AND THE OTHER REQUIRED
DOCUMENTS IS AT THE OPTION AND RISK OF THE TENDERING SHAREHOLDER. IF SENT BY
MAIL, REGISTERED MAIL WITH RETURN RECEIPT REQUESTED, PROPERLY ISSUED, IS
RECOMMENDED. IN ALL CASES, SUFFICIENT TIME SHOULD BE ALLOWED TO ENSURE TIMELY
DELIVERY.
 
    No alternative, conditional or contingent tenders will be accepted and no
fractional Shares will be purchased. All tendering shareholders, by execution of
this Letter of Transmittal (or facsimile thereof), waive any right to receive
any notice of the acceptance of their Shares and for payment.
 
    3.  INADEQUATE SPACE.  If the space provided herein is inadequate, the
certificate numbers and/or the number of Shares should be listed on a separate
SIGNED schedule and attached hereto.
 
    4.  PARTIAL TENDERS.  If fewer than all the Shares evidenced by any
certificate submitted are to be tendered, fill in the number of Shares which are
to be tendered in the box entitled "Number of Shares Tendered." In such case,
new certificate(s) for the remainder of the Shares that were evidenced by the
old certificate(s) will be sent to the registered holder(s), unless otherwise
provided in the appropriate box on this Letter of Transmittal, as soon as
practicable after the Expiration Date. All Shares represented by certificates
delivered to the Depositary will be deemed to have been tendered unless
otherwise indicated.
 
    5.  SIGNATURES ON LETTER OF TRANSMITTAL, STOCK POWERS AND ENDORSEMENTS.  If
this Letter of Transmittal is signed by the registered holder(s) of the Shares
tendered hereby, the signature(s) must correspond with the name(s) as written on
the face of the certificates without alteration, enlargement or any change
whatsoever.
 
    If any of the Shares tendered hereby are held of record by two or more joint
holders, all such holders must sign this Letter of Transmittal.
 
    If any of the Shares tendered hereby are registered in different names on
several certificates, it will be necessary to complete, sign and submit as many
separate Letters of Transmittal as there are different registrations of
certificates.
 
    When this Letter of Transmittal is signed by the registered holder(s) of the
Shares listed and transmitted hereby, no endorsements of certificates or
separate stock powers are required unless payment is to be made, or certificates
for Shares not tendered or purchased are to be issued, to any person other than
the registered holder(s). Signatures on such certificates or stock powers must
be guaranteed by an Eligible Institution.
 
    If this Letter of Transmittal is signed by a person or persons other than
the registered holder(s) of the certificate(s) listed, then the certificate(s)
must be endorsed or accompanied by appropriate stock powers, in either case
signed exactly as the name or names of the registered holder or holders
appear(s) on the
 
                                       4
<PAGE>
certificates. Signatures on certificates or stock powers required by this
Instruction 5 must be guaranteed by an Eligible Institution, unless the
signature is that of an Eligible Institution.
 
    If this Letter of Transmittal or any certificate or stock power is signed by
trustees, executors, administrators, guardians, attorneys-in-fact, officers of
corporations or others acting in a fiduciary or representative capacity, such
persons should so indicate when signing, and proper evidence satisfactory to
Purchaser of their authority so to act must be submitted.
 
    6.  SPECIAL PAYMENT AND DELIVERY INSTRUCTIONS.  If a check is to be issued
in the name(s) of, and/or certificates for unpurchased or untendered Shares are
to be issued to, a person(s) other than the signer(s) of this Letter of
Transmittal or if a check is to be sent and/or such certificates are to be
returned to someone other than the signer of this Letter of Transmittal or to an
address other than that shown above, the appropriate boxes on this Letter of
Transmittal should be completed. Shareholders tendering Shares by book-entry
transfer may request that Shares not purchased be credited to such account
maintained at the Book-Entry Transfer Facility. If no such instructions are
given, such Shares not purchased will be returned by crediting the account at
the Book-Entry Transfer Facility designated above.
 
    7.  STOCK TRANSFER TAXES.  Purchaser will pay or cause to be paid any stock
transfer taxes applicable with respect to the transfer and sale of purchased
Shares to Purchaser pursuant to the Offer. If, however, payment of the purchase
price is to be made to, or if certificates for Shares not tendered or not
accepted for payment are to be registered in the name of, any person(s) other
than the registered holder(s), or if tendered certificates are registered in the
name of any person(s) other than the person(s) signing this Letter of
Transmittal, the amount of any stock transfer taxes (whether imposed on the
registered owner or such person(s)) payable on account of the transfer to such
person(s) will be deducted from the purchase price unless satisfactory evidence
of the payment of such taxes or exemption therefrom is submitted. Except as
provided in this Instruction 7, it will not be necessary for transfer tax stamps
to be affixed to the certificates listed in this Letter of Transmittal.
 
    8.  WAIVER OF CONDITIONS.  Subject to the Merger Agreement, Purchaser
reserves the absolute right, in its sole discretion, to waive any of the
specified conditions of the Offer, in whole or in part, in the case of any
Shares tendered.
 
    9.  REQUESTS FOR ASSISTANCE AND ADDITIONAL COPIES.  Requests for assistance
may be directed to, or additional copies of the Offer to Purchase, this Letter
of Transmittal, the Notice of Guaranteed Delivery for Shares and the Guidelines
for Certification of Taxpayer Identification Number on Substitute Form W-9 may
be obtained from, the Information Agent or the Dealer Manager at their addresses
set forth below or from your broker, dealer, commercial bank or trust company.
 
    10.  SUBSTITUTE FORM W-9.  Each tendering shareholder is required to provide
the Depositary with a correct taxpayer identification number ("TIN"), generally
the shareholder's social security or federal employer's identification number,
on Substitute Form W-9, which is provided below. You must cross out item (2) in
the Certification box on Substitute Form W-9 if you are subject to backup
withholding. Failure to provide the information on the form may subject the
tendering shareholder to 31 percent federal income tax withholding on the
payments made to the shareholder or other payee with respect to Shares purchased
pursuant to the Offer. The box in Part 3 of the form may be checked if the
tendering shareholder has not been issued a TIN and has applied for a TIN or
intends to apply for a TIN in the near future. If the box in Part 3 is checked
and the Depositary is not provided with a TIN within sixty (60) days, thereafter
the Depositary will withhold 31 percent on all such payments of the purchase
price until a TIN is provided to the Depositary.
 
    11.  WIRE TRANSFER.  Any person who tenders Shares representing more than 1%
(282,227) of the Company's outstanding Shares may receive payment of Offer
proceeds by wire transfer. For further information, eligible shareholders may
contact the Depositary at the address set forth below.
 
                           IMPORTANT TAX INFORMATION
 
    Under the federal tax law, a shareholder whose tendered Shares are accepted
for payment is required by law to provide the Depositary with such shareholder's
correct TIN on Substitute Form W-9 below. If such shareholder is an individual,
the TIN is his social security number. If the Depositary is not provided
 
                                       5
<PAGE>
with the correct TIN, the shareholder or other payee may be subject to a $50
penalty imposed by the Internal Revenue Service. In addition, payments that are
made to such shareholder or other payee with respect to Shares purchased
pursuant to the Offer may be subject to backup withholding.
 
    Certain shareholders (including, among others, all corporations and certain
foreign individuals) are not subject to these backup withholding and reporting
requirements. In order for a foreign individual to qualify as an exempt
recipient, that shareholder must submit to the Depositary a properly completed
Internal Revenue Form W-8, signed under penalties of perjury, attesting to that
shareholder's exempt status. A Form W-8 can be obtained from the Depositary. See
the enclosed "Guidelines for Certification of Taxpayer Identification Number on
Substitute Form W-9" for additional instruction.
 
    If backup withholding applies, the Depositary is required to withhold 31
percent of any payments made to the shareholder or other payee. Backup
withholding is not an additional tax. Rather, the federal income tax liability
of persons subject to backup withholding will be reduced by the amount of tax
withheld. If withholding results in an overpayment of taxes, a refund may be
obtained from the Internal Revenue Service.
 
PURPOSE OF SUBSTITUTE FORM W-9
 
    To prevent backup withholding on payments made to a shareholder or other
payee with respect to Shares purchased pursuant to the Offer, the shareholder is
required to notify the Depositary of the shareholder's correct TIN by completing
the form below, certifying that the TIN provided on Substitute Form W-9 is
correct (or that such shareholder is awaiting a TIN) and that (1) the
shareholder has not been notified by the Internal Revenue Service that the
shareholder is subject to backup withholding as a result of failure to report
all interest or dividends or (2) the Internal Revenue Service has notified the
shareholder that the shareholder is no longer subject to backup withholding.
 
WHAT NUMBER TO GIVE THE DEPOSITARY
 
    The shareholder is required to give the Depositary the TIN (e.g., social
security number or employer identification number) of the record owner of the
Shares. If the Shares are in more than one name or are not in the name of the
actual owner, consult the enclosed "Guidelines for Certification of Taxpayer
Identification Number on Substitute Form W-9" for additional guidance on which
number to report.
 
NOTE:  FAILURE TO COMPLETE AND RETURN FORM W-9 MAY RESULT IN BACKUP WITHHOLDINGS
       OF 31 PERCENT OF ANY PAYMENTS MADE TO YOU PURSUANT TO THE OFFER, PLEASE
       REVIEW THE ENCLOSED GUIDELINES FOR CERTIFICATION OF TAXPAYER
       IDENTIFICATION NUMBER ON SUBSTITUTE FORM W-9 FOR ADDITIONAL DETAILS.
                        THE INFORMATION AGENT FOR THE OFFER IS:
 
                            [MACKENZIE PARTNERS, INC. LOGO]
 
                                   156 Fifth Avenue
                               New York, New York 10010
                             (212) 929-5500 (Call Collect)
                                          OR
                            CALL TOLL FREE: 1-800-332-2885
 
                         THE DEALER MANAGER FOR THE OFFER IS:
 
                                Warburg Dillon Read LLC
                                  535 Madison Avenue
                               New York, New York 10022
                                    (212) 906-7836
 
                                       6
<PAGE>
                PLEASE READ ACCOMPANYING INSTRUCTIONS CAREFULLY
 
- --------------------------------------------------------------------------------
 
                          SPECIAL PAYMENT INSTRUCTIONS
                        (SEE INSTRUCTIONS 1, 5, 6 AND 7)
      To be completed ONLY if certificates for Shares not tendered or not
  accepted for payment and/or the check for the purchase price of Shares
  accepted for payment are to be issued in the name of someone other than the
  undersigned, or if Shares delivered by book-entry transfer which are not
  accepted for payment are to be returned by credit to an account maintained
  at a Book-Entry Transfer Facility other than account indicated above.
  Issue:  / / Check  / / Certificates to:
 
  Name _______________________________________________________________________
                                 (PLEASE PRINT)
  Address ____________________________________________________________________
  ____________________________________________________________________________
  ____________________________________________________________________________
                                 (ZIP CODE)
  ____________________________________________________________________________
                (TAXPAYER IDENTIFICATION OR SOCIAL SECURITY NO.)
- -------------------------------------------------
 
- -------------------------------------------------
                         SPECIAL DELIVERY INSTRUCTIONS
                        (SEE INSTRUCTIONS 1, 5, 6 AND 7)
 
      To be completed ONLY if certificates for Shares not tendered or not
  accepted for payment and/or the check for the purchase of Shares accepted
  for payment are to be sent to someone other than the undersigned, or to the
  undersigned at an address other than that below.
 
  Mail:  / / Check  / / Certificates to:
 
  Name _______________________________________________________________________
                                 (PLEASE PRINT)
 
  Address ____________________________________________________________________
 
  ____________________________________________________________________________
 
  ____________________________________________________________________________
                                   (ZIP CODE)
 
  ____________________________________________________________________________
                (TAXPAYER IDENTIFICATION OR SOCIAL SECURITY NO.)
- -------------------------------------------------
<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------
<S>                                                                                                   <C>
                                       SHAREHOLDER SIGN HERE
                                (ALSO COMPLETE SUBSTITUTE FORM W-9)
                                    SIGNATURE(S) OF
SHAREHOLDER(S)
Dated: , 1998
(Must be signed by registered holder(s) exactly as name(s) on stock certificate(s) or on a security
position listing or by person(s) authorized to become registered holder(s) by certificates and
documents transmitted herewith. If signature is by an officer of a corporation, attorney-in-fact,
executor, administrator, trustee, guardian or other person(s) acting in a fiduciary or
representative capacity, please set forth full title and see Instruction 5.)
Name(s):
- ---------------------------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------------------------
                                           (PLEASE PRINT)
Capacity (Full Title):
- ---------------------------------------------------------------------------------------------------
Address:
- ---------------------------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------------------------
(ZIP CODE)
Area Code and Tel. No.:
- ---------------------------------------------------------------------------------------------------
- ---------------------------------------------------------------------------------------------------
 
<CAPTION>
- ---------------------------------------------------------------------------------------------------
<S>                                                                                                   <C>
                                     GUARANTEE OF SIGNATURE(S)
                              (IF REQUIRED--SEE INSTRUCTIONS 1 AND 5)
Authorized
Signature:
Name:
                                           (PLEASE PRINT)
 
                                                                                       Name of Firm:
                                                                                            Address:
                                                                                          (ZIP CODE)
 
Area Code and Tel. No.:
Dated:
- ---------------------------------------------------------------------------------------------------
</TABLE>
 
                                       7
<PAGE>
           PAYER'S NAME: IBJ SCHRODER BANK & TRUST COMPANY, AS AGENT
                              (SEE INSTRUCTION 10)
 
<TABLE>
<S>                               <C>                              <C>
- ---------------------------------------------------------------------------------------------------
SUBSTITUTE                        Part 1--PLEASE PROVIDE YOUR TIN  Social Security Number(s)
FORM W-9                          IN THE BOX AT RIGHT AND CERTIFY  OR -------------------
Department of the Treasury        BY SIGNING AND DATING BELOW      Employer Identification Number
Internal Revenue Service
                                  -----------------------------------------------------------------
Payer's Request for Taxpayer      PART 2--
Identification Number (TIN)       Certification--Under penalties of perjury, I certify that:
                                  (1) The number shown on this form is my correct Taxpayer
                                  Identification Number (or I am waiting for a number to be issued
                                      to me) and
                                  (2) I am not subject to backup withholding either because I have
                                  not been notified by the Internal Revenue Service (IRS) that I am
                                      subject to backup withholding as a result of failure to
                                      report all interest or dividends, or the IRS has notified me
                                      that I am no longer subject to backup withholding.
                                  -----------------------------------------------------------------
                                  CERTIFICATION INSTRUCTIONS--You  PART 3--
                                  must cross out item (2) above    WAITING TIN / /
                                  if you have been notified by
                                  the IRS that you are subject to
                                  backup withholding because of
                                  underreporting interest or
                                  dividends on your tax return.
                                  However, if after being
                                  notified by the IRS that you
                                  were subject to backup
                                  withholding you received
                                  another notification from the
                                  IRS that you are no longer
                                  subject to backup withholding,
                                  do not cross out item (2).
 
                                  SIGNATURE: ------------------
                                  DATE: ------------------------
- ---------------------------------------------------------------------------------------------------
</TABLE>
 
YOU MUST COMPLETE THE FOLLOWING CERTIFICATE IF YOU CHECKED THE BOX IN PART 3 OF
                              SUBSTITUTE FORM W-9
<TABLE>
<CAPTION>
- ---------------------------------------------------------------------------------------------------
 
<S>                                                                                                  <C>
                      CERTIFICATE OF AWAITING TAXPAYER IDENTIFICATION NUMBER
    I certify under penalties of perjury that a taxpayer identification number has not been issued
to me, and either (a) I have mailed or delivered an application to receive a taxpayer
identification number to the appropriate Internal Revenue Service Center or Social Security
Administration Office or (b) I intend to mail or deliver an application in the near future. I
understand that if I do not provide a taxpayer identification number within sixty (60) days, 31
percent of all reportable payments made to me thereafter will be withheld until I provide a number.
                            Signature                                           Date
 
<CAPTION>
- ---------------------------------------------------------------------------------------------------
</TABLE>

<PAGE>
                          ZEIGLER COAL HOLDING COMPANY
                                 50 JEROME LANE
                           FAIRVIEW HEIGHTS, IL 62208
 
                                                                  August 5, 1998
 
Dear Shareholders:
 
    We are please to inform you that our Company has entered into an Agreement
and Plan of Merger, dated as of August 3, 1998 (the "Merger Agreement"), with
AEI Resources, Inc. ("Parent") and Zeigler Acquisition Corp., a wholly-owned
subsidiary of Parent ("Purchaser"). Pursuant to the Merger Agreement, Purchaser
has today commenced a cash tender offer (the "Offer") to purchase all of the
outstanding common stock, $.01 par value (the "Shares"), of the Company at a
purchase price of $21.25 per Share, net to the shareholder in cash. Following
the successful consummation of the Offer, Purchaser will be merged with and into
the Company (the "Merger") and the Company will become a wholly-owned subsidiary
of Parent.
 
    YOUR BOARD OF DIRECTORS HAS UNANIMOUSLY DETERMINED THAT THE OFFER AND THE
MERGER ARE FAIR TO AND IN THE BEST INTERESTS OF THE COMPANY AND ITS
STOCKHOLDERS, HAS APPROVED THE MERGER AGREEMENT AND THE TRANSACTIONS
CONTEMPLATED THEREBY, INCLUDING THE OFFER AND THE MERGER, AND RECOMMENDS THAT
ALL HOLDERS OF SHARES ACCEPT THE OFFER AND TENDER THEIR SHARES PURSUANT TO THE
OFFER AND APPROVE AND ADOPT THE MERGER AGREEMENT AND THE MERGER.
 
    In arriving at its recommendation, the Board of Directors gave careful
consideration to the factors described in the attached Schedule 14D-9 that is
being filed today with the Securities and Exchange Commission, including, among
other things, the opinion of Credit Suisse First Boston Corporation, the
Company's financial advisor, that the consideration to be received by
stockholders in the Offer and the subsequent Merger pursuant to the Merger
Agreement is fair, from a financial point of view, to such stockholders.
 
    In addition to the attached Schedule 14D-9, enclosed is the Offer to
Purchase dated August 5, 1998 together with related materials, including a
Letter of Transmittal, to be used for tendering your Shares pursuant to the
Offer. These documents state the terms and conditions of the Offer and the
subsequent Merger, provide detailed information about the transactions and
include instructions as to how to tender your Shares. We urge you to read these
documents carefully in making your decision with respect to tendering your
Shares pursuant to the Offer.
 
Very truly yours,
 
Chand B. Vyas
PRESIDENT AND CHIEF EXECUTIVE OFFICER

<PAGE>
WARBURG DILLON READ LLC
535 MADISON AVENUE
NEW YORK, NEW YORK 10022
 
                           OFFER TO PURCHASE FOR CASH
                     ALL OUTSTANDING SHARES OF COMMON STOCK
                                       OF
                          ZEIGLER COAL HOLDING COMPANY
                                       AT
                              $21.25 NET PER SHARE
                                       BY
                        ZEIGLER ACQUISITION CORPORATION
                           A WHOLLY OWNED SUBSIDIARY
                                       OF
                              AEI RESOURCES, INC.
 
           THE OFFER AND WITHDRAWAL RIGHTS EXPIRE AT 12:00 MIDNIGHT,
NEW YORK CITY TIME, ON TUESDAY, SEPTEMBER 1, 1998, UNLESS THE OFFER IS EXTENDED.
 
                                                                  August 5, 1998
 
To Brokers, Dealers, Commercial
Banks, Trust Companies and Other Nominees:
 
    We have been appointed by Zeigler Acquisition Corporation, a Delaware
corporation ("Purchaser") and a wholly owned subsidiary of AEI Resources, Inc.,
to act as Dealer Manager in connection with Purchaser's offer to purchase all of
the outstanding shares of common stock, par value $.01 per share (the "Shares"),
of Zeigler Coal Holding Company (the "Company"), at $21.25 per Share, net to the
seller in cash, upon the terms and subject to the conditions set forth in
Purchaser's Offer to Purchase dated August 5, 1998 (the "Offer to Purchase") and
the related Letter of Transmittal (which, together with any amendments or
supplements thereto, collectively constitute the "Offer").
 
    THE OFFER IS SUBJECT TO SEVERAL CONDITIONS CONTAINED IN THE OFFER TO
PURCHASE INCLUDING (1) THERE BEING VALIDLY TENDERED AND NOT PROPERLY WITHDRAWN
PRIOR TO THE EXPIRATION OF THE OFFER A NUMBER OF SHARES WHICH CONSTITUTES AT
LEAST 90% OF THE COMPANY'S OUTSTANDING SHARES ON A FULLY DILUTED BASIS,
EXCLUDING OPTIONS TENDERED FOR CANCELLATION, (2) PURCHASER HAVING OBTAINED
FUNDS, PURSUANT TO EXISTING FINANCING COMMITMENTS DESCRIBED IN THE OFFER TO
PURCHASE OR OTHERWISE, SUFFICIENT TO CONSUMMATE THE TRANSACTIONS CONTEMPLATED BY
THE MERGER AGREEMENT, INCLUDING THE PURCHASE OF ALL OF THE SHARES PURSUANT TO
THE OFFER OR THE MERGER, ALL PAYMENTS WITH RESPECT TO OPTIONS TO PURCHASE
SHARES, AND ALL RELATED COSTS AND EXPENSES, AND (3) THE EXPIRATION OR
TERMINATION OF ANY APPLICABLE WAITING PERIOD UNDER THE HART-SCOTT-RODINO
ANTITRUST IMPROVEMENTS ACT OF 1976, AS AMENDED. CERTAIN DIRECTORS AND
SHAREHOLDERS HOLDING APPROXIMATELY 33% OF THE OUTSTANDING SHARES ON A FULLY
DILUTED BASIS HAVE AGREED TO TENDER THEIR SHARES. THE OFFER IS ALSO SUBJECT TO
OTHER TERMS AND CONDITIONS CONTAINED IN THE OFFER TO PURCHASE. SEE INTRODUCTION
AND SECTIONS 1 AND 13 IN THE OFFER TO PURCHASE.
<PAGE>
    For your information and for forwarding to your clients for whom you hold
Shares registered in your name or in the name of your nominee, we are enclosing
the following documents:
 
        1.  Offer to Purchase dated August 5, 1998;
 
        2.  Letter of Transmittal to tender Shares for your use and for the
    information of your clients, together with GUIDELINES FOR CERTIFICATION OF
    TAXPAYER IDENTIFICATION NUMBER ON SUBSTITUTE FORM W-9 providing information
    relating to backup federal income tax withholding (facsimile copies of the
    Letter of Transmittal may be used to tender Shares);
 
        3.  Notice of Guaranteed Delivery to be used to accept the Offer if the
    certificates for the Shares being tendered and all other required documents
    cannot be delivered to the Depositary by the Expiration Date as defined in
    the Offer to Purchase or if procedures for book-entry transfer cannot be
    completed by the Expiration Date;
 
        4.  A printed form of letter which may be sent to your clients for whose
    accounts you hold Shares registered in your name or in the name of your
    nominee, with space provided for obtaining such clients' instructions with
    regard to the Offer; and
 
        5.  A letter to Zeigler Coal Holding Company shareholders from the
    President and Chief Executive Officer of Zeigler Coal Holding Company,
    together with a Solicitation/Recommendation Statement on Schedule 14D-9,
    filed with the Securities and Exchange Commission by the Company and mailed
    to shareholders of the Company recommending that the Company's shareholders
    accept the Offer and tender their Shares.
 
    YOUR PROMPT ACTION IS REQUESTED. WE URGE YOU TO CONTACT YOUR CLIENTS AS
PROMPTLY AS POSSIBLE. PLEASE NOTE THAT THE OFFER AND WITHDRAWAL RIGHTS WILL
EXPIRE AT 12:00 MIDNIGHT NEW YORK CITY TIME, ON TUESDAY, SEPTEMBER 1, 1998,
UNLESS THE OFFER IS EXTENDED.
 
    Upon the terms and subject to the conditions of the Offer (including, if the
Offer is extended or amended, the terms and conditions of any such extension or
amendment), Purchaser will accept for payment and pay for the Shares which are
validly tendered prior to the Expiration Date and not theretofore properly
withdrawn when, as and if Purchaser gives oral or written notice to the
Depositary of Purchaser's acceptance of such Shares for payment pursuant to the
Offer. Payment for the Shares purchased pursuant to the Offer will in all cases
be made only after timely receipt by the Depositary of certificates for the
Shares or timely confirmation of a book-entry transfer of such Shares into the
Depositary's account at The Depository Trust Company, pursuant to the procedures
described in "The Tender Offer--3. Procedure for Tendering Shares" of the Offer
to Purchase, a properly completed and duly executed Letter of Transmittal (or
manually signed facsimile thereof) or an Agent's Message in connection with a
book-entry transfer, and all other documents required by the Letter of
Transmittal.
 
    If holders of Shares wish to tender, but it is impracticable for them to
forward their certificates or other required documents on or prior to the
Expiration Date or to comply with the book-entry transfer procedure on a timely
basis, a tender may be effected by following the guaranteed delivery procedures
specified in "The Tender Offer--3. Procedure for Tendering Shares" in the Offer
to Purchase.
 
    Purchaser will not pay any fees or commissions to any broker or dealer or
other person (other than to the Dealer Manager as described in the Offer to
Purchase) for soliciting tenders of the Shares pursuant to the Offer. Purchaser
will, however, upon request, reimburse brokers, dealers, commercial banks and
trust companies for reasonable and necessary costs and expenses incurred by them
in forwarding materials to their customers. Purchaser will pay all stock
transfer taxes applicable to its purchase of Shares pursuant to the Offer,
subject to Instruction 7 of the Letter of Transmittal.
 
                                       2
<PAGE>
    Any inquiries you may have with respect to the Offer should be addressed to,
and additional copies of the enclosed materials may be obtained from, any of the
Information Agent or the undersigned at the addresses and telephone numbers set
forth on the back cover of the Offer to Purchase and the Letter of Transmittal.
 
                                          Very truly yours,
                                          WARBURG DILLON READ LLC
 
    NOTHING CONTAINED HEREIN OR IN THE ENCLOSED DOCUMENTS SHALL CONSTITUTE YOU
OR ANY PERSON AS AN AGENT OF PURCHASER, THE DEALER MANAGER, THE INFORMATION
AGENT OR THE DEPOSITARY, OR AUTHORIZE YOU OR ANY OTHER PERSON TO USE ANY
DOCUMENT OR MAKE ANY STATEMENT ON BEHALF OF ANY OF THEM IN CONNECTION WITH THE
OFFER OTHER THAN THE DOCUMENTS ENCLOSED HEREWITH AND THE STATEMENTS CONTAINED
THEREIN.
 
                                       3

<PAGE>
                         NOTICE OF GUARANTEED DELIVERY
                    (NOT TO BE USED FOR SIGNATURE GUARANTEE)
                        TO TENDER SHARES OF COMMON STOCK
                                       OF
                          ZEIGLER COAL HOLDING COMPANY
             PURSUANT TO THE OFFER TO PURCHASE DATED AUGUST 5, 1998
                                       OF
                        ZEIGLER ACQUISITION CORPORATION
                          A WHOLLY OWNED SUBSIDIARY OF
                              AEI RESOURCES, INC.
 
    This Notice of Guaranteed Delivery, or one substantially equivalent to the
attached form, must be used to accept the Offer (as defined below) if (i)
certificates for shares of common stock, par value $.01 per share (the
"Shares"), of Zeigler Coal Holding Company and all other documents required by
the Letter of Transmittal cannot be delivered to the Depositary by the
expiration of the Offer (as defined in the Offer to Purchase) or (ii) the
procedures for delivery of book-entry transfer cannot be completed on a timely
basis. This Notice of Guaranteed Delivery may be delivered by hand or sent by
facsimile transmission or mail to the Depositary. See "The Tender Offer--3.
Procedure for Tendering Shares" in the Offer to Purchase.
 
                        THE DEPOSITARY FOR THE OFFER IS:
 
                       IBJ SCHRODER BANK & TRUST COMPANY
 
<TABLE>
<S>                             <C>                             <C>
           BY MAIL:               BY FACSIMILE TRANSMISSION:    BY HAND OR OVERNIGHT COURIER:
 
  IBJ Schroder Bank & Trust             (212) 858-2611            IBJ Schroder Bank & Trust
           Company                                                         Company
         P.O. Box 84                                                   One State Street
    Bowling Green Station                 To Confirm               New York, New York 10004
New York, New York 10274-0084    Facsimile Transmissions Call    Attn: Securities Processing
     Attn: Reorganization               (212) 858-2103                      Window
          Operations
          Department
</TABLE>
 
    DELIVERY OF THIS NOTICE OF GUARANTEED DELIVERY TO AN ADDRESS OTHER THAN AS
SET FORTH ABOVE OR TRANSMISSION OF INSTRUCTIONS VIA A FACSIMILE TRANSMISSION TO
A NUMBER OTHER THAN AS SET FORTH ABOVE DOES NOT CONSTITUTE A VALID DELIVERY.
 
    This Notice of Guaranteed Delivery is not to be used to guarantee
signatures. If a signature of a Letter of Transmittal is required to be
guaranteed by an "Eligible Institution" under the instructions thereto, such
signature guarantee must appear in the applicable space provided in the
signature box on the Letter of Transmittal.
<PAGE>
Ladies and Gentlemen:
 
    The undersigned hereby tenders to Zeigler Acquisition Corporation
("Purchaser"), upon the terms and subject to the conditions set forth in the
Offer to Purchase dated August 5, 1998 and the related Letter of Transmittal
(which, together with any amendments or supplements thereto, collectively
constitute the "Offer"), receipt of which is hereby acknowledged, the number
(indicated below) of Shares pursuant to the guaranteed delivery procedure set
forth in "The Tender Offer--3. Procedure for Tendering Shares" of the Offer to
Purchase.
 
    Number of Shares being tendered hereby:              Shares
 
  Certificate No(s).
  (if available):
  ____________________________________________________________________________
  If Shares will be tendered by book-entry transfer:
 
  Name of Tendering Institution ______________________________________________
 
  Account No. _____________________________________________________________ at
 
  The Depository Trust Company
 
                                   SIGN HERE:
 
  ____________________________________________________________________________
                                                               (SIGNATURE(S))
 
   __________________________________________________________________________
                                                  (NAME(S) OF RECORD HOLDERS)
                                                               (PLEASE PRINT)
 
   __________________________________________________________________________
                                                                    (ADDRESS)
 
   __________________________________________________________________________
                                                                   (ZIP CODE)
   __________________________________________________________________________
                                                              (TELEPHONE NO.)
 
                                   GUARANTEE
                    (NOT TO BE USED FOR SIGNATURE GUARANTEE)
    The undersigned, a financial institution (including most banks, savings and
loan associations and brokerage houses) which is a participant in the Securities
Transfer Agents Medallion Program, the New York Stock Exchange Medallion
Signature Program, or the Stock Exchange Medallion Program, hereby (a)
represents that the above named person(s) "own(s)" the Shares tendered hereby
within the meaning of Rule 14e-4 under the Securities Exchange Act of 1934, as
amended, (b) represents that such tender complies with Rule 14e-4 and (c)
guarantees to deliver to the Depositary the Shares tendered hereby, together
with a properly completed and duly executed Letter(s) of Transmittal (or
facsimile(s) thereof) or an Agent's Message as defined in the Offer to Purchase
in the case of a book-entry delivery, and any other required documents, all
within three New York Stock Exchange trading days of the date hereof.
 
  ____________________________________________________________________________
   (NAME OF FIRM)
 
   __________________________________________________________________________
   (ADDRESS)
 
   __________________________________________________________________________
   (ZIP CODE)
 
   __________________________________________________________________________
   (TELEPHONE NO.)
 
  Dated: ______________________________________________________________, 1998.
 
  ____________________________________________________________________________
                                                       (AUTHORIZED SIGNATURE)
 
   __________________________________________________________________________
                                                                       (NAME)
 
   __________________________________________________________________________
                                                                      (TITLE)
 
                 DO NOT SEND STOCK CERTIFICATES WITH THIS FORM.
      YOUR STOCK CERTIFICATES MUST BE SENT WITH THE LETTER OF TRANSMITTAL.

<PAGE>
            GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
                         NUMBER ON SUBSTITUTE FORM W-9
 
    GUIDELINES FOR DETERMINING THE PROPER IDENTIFICATION NUMBER TO GIVE THE
PAYER.  -- Social Security numbers have nine digits separated by two hyphens:
i.e., 000-00-0000. Employer identification numbers have nine digits separated by
only one hyphen: i.e., 00-0000000. The table below will help determine the
number to give the payer.
<TABLE>
<CAPTION>
- -----------------------------------------------------------  -----------------------------------------------------------
<S>                                <C>                       <C>                                <C>
                                   GIVE THE                                                     GIVE THE EMPLOYER
                                   SOCIAL SECURITY                                              IDENTIFICATION
    FOR THIS TYPE OF ACCOUNT:      NUMBER OF --                  FOR THIS TYPE OF ACCOUNT:      NUMBER OF --
 
<CAPTION>
- -----------------------------------------------------------  -----------------------------------------------------------
<S>                                <C>                       <C>                                <C>
1. An individual's account         The individual            8. Sole proprietorship account     The owner (4)
 
2. Two or more individuals (joint  The actual owner of the   9. A valid trust, estate or        The legal entity (do not
   account)                        account or, if combined   pension trust                      furnish the identifying
                                   funds, any one of the                                        number of the personal
                                   individuals (1)                                              representative or
                                                                                                trustee unless the legal
                                                                                                entity itself is not
                                                                                                designated in the
                                                                                                account title) (5)
 
3. Husband and wife (joint         The actual owner of the   10. Corporate account              The corporation
   account)                        account or, if joint
                                   funds, either person (1)
 
4. Custodian account of a minor    The minor(2)              11. Religious, charitable,         The organization
    (Uniform Gift to Minors Act)                             educational or other tax-exempt
                                                                 organization account
 
5. Adult and minor (joint          The adult or, if the      12. Partnership account held in    The partnership
   account)                        minor is the only         the name of the business
                                   contributor, the minor
                                   (1)
 
6. Account in the name of          The ward, minor, or       13. Association, club, or other    The organization
   guardian or committee for a     incompetent person (3)    tax- exempt organization
    designated ward, minor, or
    incompetent person
 
7. a. The usual revocable savings  The grantor-trustee (1)   14. A broker or registered         The broker or nominee
    trust account (grantor is                                    nominee
    also trustee)
 
  b. So-called trust account that  The actual owner (1)      15. Account with the Department    The public entity
     is not a legal or valid                                 of Agriculture in the name of a
    trust under State law                                        public entity (such as a
                                                                 State or local government,
                                                                 school district, or prison)
                                                                 that receives agricultural
                                                                 program payments
- ------------------------------------------------------------------------------------------------------------------------
</TABLE>
 
(1) List first and circle the name of the person whose number you furnish. If
    only one person on a joint account has a Social Security number, that
    person's number must be furnished.
 
(2) Circle the minor's name and furnish the minor's social security number.
 
(3) Circle the ward's, minor's or incompetent person's name and furnish such
    person's social security number.
 
(4) You must show your individual name, but you may also enter your business or
    "doing business as" name. You may use either your Social Security number or
    employer identification number (if you have one).
 
(5) List first and circle the name of the legal trust, estate, or pension trust.
 
NOTE: If no name is circled when there is more than one name, the number will be
      considered to be that of the first name listed.
 
<PAGE>
            GUIDELINES FOR CERTIFICATION OF TAXPAYER IDENTIFICATION
                         NUMBER ON SUBSTITUTE FORM W-9
                                     PAGE 2
 
OBTAINING A NUMBER
 
    If you do not have a taxpayer identification number or you do not know your
number, obtain Form SS-5, Application for a Social Security Number Card, or Form
SS-4, Application for Employer Identification Number (for business and all other
entities), at the local office of the Social Security Administration or the
Internal Revenue Service (the "IRS") and apply for a number.
 
PAYEES EXEMPT FROM BACKUP WITHHOLDING
 
    Payees specifically exempted from backup withholding on ALL payments include
the following:
 
    - A corporation.
 
    - A financial institution.
 
    - An organization exempt from tax under Section 501(a) of the Internal
      Revenue Code of 1986, as amended (the "Code"), or an individual retirement
      plan, or a custodial account under Section 403(b)(7) if the account
      satisfies the requirements of Section 401(F)(7).
 
    - The United States or any of its agencies or instrumentalities.
 
    - A State, the District of Columbia, a possession of the United States, or
      any political subdivision or instrumentality thereof.
 
    - A foreign government, a political subdivision of a foreign government, or
      any agency, or instrumentality thereof.
 
    - An international organization or any agency or instrumentality thereof.
 
    - A registered dealer in securities or commodities registered in the U.S.,
      the District of Columbia or a possession of the U.S.
 
    - A real estate investment trust.
 
    - A common trust fund operated by a bank under Section 584(a) of the Code.
 
    - An exempt charitable remainder trust, or a non-exempt trust described in
      Section 4947(a)(1) of the Code.
 
    - An entity registered at all times under the Investment Company Act of
      1940.
 
    - A foreign central bank of issue.
 
    - A middleman known in the investment community as a nominee or who is
      listed in the most recent publication of the American Society of Corporate
      Secretaries, Inc., Nominee List.
 
Payments of dividends and patronage dividends not generally subject to backup
withholding include the following:
 
    - Payments to nonresident aliens subject to withholding under Section 1441
      of the Code.
 
    - Payments in partnerships not engaged in a trade or business in the U.S.
      and which have at least one nonresident partner.
 
    - Payments of patronage dividends where the amount received is not paid in
      money.
 
    - Payments made by certain foreign organizations.
 
    - Payments made to a nominee.
 
    - Section 404(k) payments made by an ESOP.
 
Payments of interest not generally subject to backup withholding include the
following:
 
    - Payments of interest on obligations issued by individuals.
 
      NOTE: You may be subject to backup withholding if this interest is $600 or
      more and is paid in the course of the payer's trade or business and you
      have not provided your correct taxpayer identification number to the
      payer.
 
    - Payments of tax-exempt interest (including exempt-interest dividends under
      Section 852 of the Code).
 
    - Payments described in Section 6049(b)(5) of the Code to nonresident
      aliens.
 
    - Payments on tax-free covenant bonds under Section 1451 of the Code.
 
    - Payments made by certain foreign organizations.
 
    - Payments made to a nominee.
 
    - Mortgage interest paid by you.
 
EXEMPT PAYEES DESCRIBED ABOVE SHOULD FILE FORM W-9 TO AVOID POSSIBLE ERRONEOUS
BACKUP WITHHOLDING. FILE THIS FORM WITH THE PAYER, FURNISH YOUR TAXPAYER
IDENTIFICATION NUMBER, WRITE "EXEMPT" ON THE FACE OF THE FORM, SIGN AND DATE THE
FORM AND RETURN IT TO THE PAYER. IF YOU ARE A NONRESIDENT ALIEN OR A FOREIGN
ENTITY NOT SUBJECT TO BACKUP WITHHOLDING, FILE WITH PAYER A COMPLETED INTERNAL
REVENUE FORM W-8 (CERTIFICATE OF FOREIGN STATUS).
 
Certain payments other than interest, dividends, and patronage dividends, that
are not subject to information reporting are also not subject to backup
withholding. For details, see the regulations under Section 6041, 6041(A)(a),
6045, and 6050A of the Code and the regulations promulgated thereunder.
 
PRIVACY ACT NOTICE. -- Section 6109 requires most recipients of dividends,
interest, or other payments to give taxpayer identification numbers to payers
who must report the payments to the IRS. The IRS uses the numbers for
identification purposes. Payers must be given the numbers whether or not
recipients are required to file tax returns. Payers must generally withhold 31%
of taxable interest, dividends, and certain other payments to a payee who does
not furnish a taxpayer identification number to a payer. Certain penalties may
also apply.
 
PENALTIES
 
(1) PENALTY FOR FAILURE TO FURNISH TAXPAYER IDENTIFICATION NUMBER. -- If you
fail to furnish your taxpayer identification number to a payer, you are subject
to a penalty of $50 for each such failure unless your failure is due to
reasonable cause and not to willful neglect.
 
(2) CIVIL PENALTY FOR FALSE INFORMATION WITH RESPECT TO WITHHOLDING. -- If you
make a false statement with no reasonable basis which results in no imposition
of backup withholding, you are subject to a penalty of $500.
 
(3) CRIMINAL PENALTY FOR FALSIFYING INFORMATION. -- Willfully falsifying
certifications or affirmations may subject you to criminal penalties including
fines and/or imprisonment.
 
                       FOR ADDITIONAL INFORMATION CONTACT
                             YOUR TAX CONSULTANT OR
                         THE INTERNAL REVENUE SERVICE.

<PAGE>

                                                                    Exhibit 7(a)


     This announcement is neither an offer to purchase nor a solicitation of 
an offer to sell Shares.  The Offer is made only by the Offer to Purchase 
dated August 5, 1998 and the related Letter of Transmittal and is being made 
to all holders of Shares.  Purchaser is not aware of any state where the 
making of the Offer is prohibited by administrative or judicial action 
pursuant to any valid state statute. If Purchaser becomes aware of any valid 
state statute prohibiting the making of the Offer or the acceptance of Shares 
pursuant thereto, Purchaser will make a good faith effort to comply with such 
state statute. If, after such good faith effort, Purchaser cannot comply with 
such state statute, the Offer will not be made to (nor will tenders be 
accepted from or on behalf of) the holders of Shares in such state.  In any 
jurisdiction where the securities, Blue Sky or other laws require the Offer 
to be made by a licensed broker or dealer, the Offer will be deemed to be 
made on behalf of AEI Resources, Inc. by Warburg Dillon Read LLC or one or 
more registered brokers or dealers licensed under the laws of such 
jurisdiction. 

                         Notice of Offer to Purchase for Cash
                        All Outstanding Shares of Common Stock

                                          of

                               Zeigler Coal Holding Company

                               at $21.25 Net Per Share

                                          by

                              Zeigler Acquisition Corporation

                              a wholly owned subsidiary of 

                                 AEI Resources, Inc.

     ZEIGLER Acquisition Corporation, a Delaware corporation ("Purchaser") and
wholly owned subsidiary of AEI Resources, Inc. ("Parent"), is offering to 
purchase all  outstanding shares of Common Stock, par value $0.01 per share 
(the "Shares"), of ZEIGLER COAL HOLDING Company, a Delaware corporation 
(the "Company"), at $21.25 per  Share, net to the seller in cash, upon the 
terms and subject to the conditions set forth in the Offer to Purchase 
dated August 5, 1998 (the "Offer to Purchase") and in the related Letter of 
Transmittal (which, together with any amendments or supplements thereto, 
collectively constitute the "Offer").  

     THE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 12:00 MIDNIGHT, NEW YORK
CITY TIME, ON TUESDAY, SEPTEMBER 1, 1998, UNLESS THE OFFER IS EXTENDED.  

     THE OFFER IS CONDITIONED UPON, AMONG OTHER THINGS, (1) THERE BEING VALIDLY
TENDERED AND NOT PROPERLY WITHDRAWN PRIOR TO THE EXPIRATION OF THE OFFER A
NUMBER OF SHARES WHICH 


<PAGE>

CONSTITUTES AT LEAST 90% OF THE OUTSTANDING SHARES ON A FULLY DILUTED BASIS, 
EXCLUDING OPTIONS TENDERED FOR CANCELLATION IN ACCORDANCE WITH THE TERMS OF 
THE MERGER AGREEMENT (AS DEFINED BELOW) (THE "MINIMUM CONDITION"), (2) 
PURCHASER HAVING OBTAINED FUNDS, PURSUANT TO EXISTING FINANCING COMMITMENTS 
OR OTHERWISE, SUFFICIENT TO CONSUMMATE THE TRANSACTIONS CONTEMPLATED BY THE 
MERGER AGREEMENT, INCLUDING THE PURCHASE OF ALL OF THE SHARES PURSUANT TO THE 
OFFER OR THE MERGER (AS DEFINED BELOW), ALL PAYMENTS WITH RESPECT TO OPTIONS 
TO PURCHASE SHARES, AND ALL RELATED COSTS AND EXPENSES (THE "FINANCING 
CONDITION"), AND (3) THE EXPIRATION OR TERMINATION OF ANY APPLICABLE WAITING 
PERIOD IMPOSED BY THE HART-SCOTT-RODINO ANTITRUST IMPROVEMENTS ACT OF 1976, 
AS AMENDED.  THE OFFER IS ALSO SUBJECT TO OTHER TERMS AND CONDITIONS 
CONTAINED IN THE OFFER TO PURCHASE.  

     The Offer is being made in connection with the Agreement and Plan of 
Merger dated as of August 3, 1998 (the "Merger Agreement"), by and among 
Parent, Purchaser and the Company.  The Merger Agreement requires, on the 
terms and subject to the conditions set forth therein, Purchaser to offer to 
purchase all of the outstanding Shares of the Company pursuant to the Offer.  
If Shares representing at least 90% of the outstanding Shares on a fully 
diluted basis (excluding options tendered for cancellation) are validly 
tendered in the Offer and purchased by Purchaser and the other conditions to 
the Merger are satisfied or waived, Purchaser will merge with and into the 
Company (the "Merger"), and any Shares not purchased in the Offer (other than 
shares with respect to which appraisal rights are properly exercised under 
Delaware law) will be converted in the Merger into the right to receive cash 
in the amount of $21.25 per Share. 
 
     Certain directors and stockholders of the Company owning approximately 
33% of the outstanding Shares on a fully diluted basis (before the tender of 
any options to the Company for cancellation) have agreed to tender their 
Shares into the Offer. 
     
     THE COMPANY'S BOARD OF DIRECTORS HAS UNANIMOUSLY DETERMINED THAT THE OFFER
AND THE MERGER ARE FAIR TO AND IN THE BEST INTERESTS OF THE COMPANY AND ITS
SHAREHOLDERS, HAS UNANIMOUSLY APPROVED THE OFFER AND THE MERGER, AND RECOMMENDS
THAT SHAREHOLDERS OF THE COMPANY ACCEPT THE OFFER AND TENDER THEIR SHARES
PURSUANT TO THE OFFER.   

     For purposes of the Offer, the Purchaser will be deemed to have accepted
for payment, and thereby purchased, Shares that have been validly tendered and
not properly withdrawn as, if and when Purchaser gives oral or written notice to
IBJ Schroder Bank & Trust Company (the "Depositary") of the Purchaser's
acceptance for payment of such Shares.  Upon the terms and subject to the
conditions of the Offer, payment for Shares accepted for payment pursuant to the
Offer will be made by deposit of the purchase price therefor with the
Depositary, which will act as agent for tendering stockholders for the purpose
of receiving payment from Purchaser and transmitting such payment to tendering
stockholders.  In all cases, payment for Shares tendered and accepted for 


<PAGE>

payment pursuant to the Offer will be made only after timely receipt by the
Depositary of (i) certificates for such Shares (or a timely confirmation of
book-entry transfer of such Shares into the Depositary's account at a Book-Entry
Transfer Facility (as defined in Section 3 of the Offer to Purchase) pursuant
to the procedures described in Section 3 of the Offer to Purchase), (ii) a
properly completed and duly executed Letter of Transmittal (or facsimile
thereof) with any required signature guarantees (or, in the case of a book-entry
transfer, an Agent's Message (as defined in Section 3 of the Offer to
Purchase)), and (iii) any other documents required by the Letter of Transmittal.
Under no circumstances will interest be paid on the purchase price, regardless
of any extension of the Offer or any delay in making such payment.
  
     The term "Expiration Date" means 12:00 Midnight, New York City Time, on 
Tuesday, September 1, 1998, unless and until the Purchaser shall have 
extended the period of time during which the  Offer is open, in which event 
the term "Expiration Date" shall mean the latest time and date in which the 
Offer, if so extended by the Purchaser, shall expire.  Subject to the terms 
of the Merger Agreement, the Purchaser has the right to extend the period of 
time which the Offer is open, and thereby delay acceptance for payment of, 
and the payment for, any Shares, by giving oral or written notice of such 
extension to the Depositary. The Merger Agreement provides that the Offer 
may be extended to no later than Wednesday, September 16, 1998 in order to 
satisfy any of the conditions to the Offer other than the Financing 
Condition.  The Merger Agreement may be terminated, and the Merger 
contemplated thereby may be abandoned, by either Parent or the Company 
if the Financing Condition shall be impossible to satisfy by the end 
of September 1, 1998 or if any other condition to the Offer shall be 
impossible to satisfy by the end of September 16, 1998 unless such an event 
results from the failure of the terminating party to perform its obligations 
under the Merger Agreement, provided that the Company may not terminate the 
Merger Agreement if Parent waives the relevant condition (other than the 
Minimum Condition which cannot be waived without the consent of the Company). 
Any extension of the Offer will be followed by a public announcement thereof 
no later than 9:00 a.m. New York City time, on the next business day after 
the previously scheduled Expiration Date.  During any such extension, all 
Shares previously tendered and not withdrawn will remain subject to the 
Offer subject to the right of a tendering stockholder to withdraw such 
stockholder's Shares.
  
     Shares tendered pursuant to the Offer may be withdrawn at any time on or
prior to the Expiration Date.  Thereafter, such tenders are irrevocable, 
except they may be withdrawn after October 4, 1998, unless theretofore 
accepted for payment and paid for by Purchaser pursuant to the Offer.  For a 
withdrawal to become effective, a written or facsimile transmission notice 
of withdrawal must be timely received by the Depositary at one of its 
addresses set forth on the back cover of the Offer to Purchase and must 
specify the name of the person having tendered the Shares to be withdrawn, 
the number of shares to be withdrawn and the name of the registered holder 
of the Shares to be withdrawn, if different from the name of the person who 
tendered the Shares.  If certificates for Shares to be withdrawn have been 
delivered or otherwise identified to the Depositary, then prior to the 
physical release of such certificates, the serial numbers shown on such 
certificates must be submitted to the Depositary and, unless such shares 
have been tendered by an Eligible Institution (as defined in Section 3 of
the Offer to Purchase), the signatures on the notice of withdrawal must be
guaranteed by an Eligible Institution.  If shares have been tendered pursuant to
the procedures for book-entry transfers as set 


<PAGE>

forth in Section 3 of the Offer to Purchase, any notice of withdrawal must also
specify the name and number of the account of the Book-Entry Transfer Facility
to be credited with the withdrawn Shares and otherwise comply with such
Book-Entry Transfer Facility's procedures.  Withdrawals of tenders of shares may
not be rescinded, and any Shares properly withdrawn will thereafter be deemed
not validly tendered for any purposes of the Offer.  However, withdrawn Shares
may be retendered by again following one of the procedures described in Section
3 of the Offer to Purchase at any time prior to the Expiration Date.  All
questions as to the form and validity (including time of receipt) of notices of
withdrawal will be determined by the Purchaser in its sole discretion, whose
determination will be final and binding.

     The Company has agreed to furnish the Purchaser with copies of the 
Company's stockholders list and security positions listings.  The Offer 
to Purchase and the related Letter of Transmittal and other relevant 
materials will be mailed to record holders of shares and furnished to
brokers, dealers, commercial banks, trust companies and similar persons whose
names, or the names of whose nominees, appear on the Company's stockholders list
or, if applicable, who are listed as participants in a clearing agency's
security position listing for subsequent transmittal to beneficial owners of
Shares.  

     The information required to be disclosed by Rule 14d-6(e)(1)(vii) of the
General Rules and Regulations under the Securities Exchange Act of 1934, as
amended, is contained in the Offer to Purchase and is incorporated herein by
reference.  

     THE OFFER TO PURCHASE AND THE LETTER OF TRANSMITTAL CONTAIN IMPORTANT
INFORMATION WHICH SHOULD BE READ CAREFULLY BEFORE ANY DECISION IS MADE WITH
RESPECT TO THE OFFER.  

     Requests for copies of the Offer to Purchase, the Letter of Transmittal and
all other tender offer materials may be directed to the Information Agent or the
Dealer Manager as set forth below, and copies will be furnished promptly at the
Purchaser's expense.  

     Questions or requests for assistance may be directed to the Information
Agent or the Dealer Manager.  

                       The Information Agent for the Offer is:

                               MacKenzie Partners, Inc.

                                   156 Fifth Avenue
                              New York, New York  10010 
                            (212) 929-5500 (Call Collect)
                                          or
                           Call Toll Free:  1-800-322-2885


                         The Dealer Manager for the Offer is:

                               Warburg Dillon Read LLC

                                  535 Madison Avenue
                               New York, New York 10022
                                    (212) 906-7836

August 5, 1998



<PAGE>

                                                                Exhibit 99(a)(8)


                 AEI RESOURCES ANNOUNCES MERGER WITH ZEIGLER
                 -------------------------------------------


     August 3, 1998 - AEI Resources, Inc. ("AEI") announced that it signed a
definitive merger agreement with Zeigler Coal Holding Company ("Zeigler")
(NYSE:ZEI) pursuant to which AEI would acquire, through a cash tender offer,
all of the outstanding common stock of Zeigler at a price of $21.25 per share
in cash. The transaction has a total value, including the Zeigler debt to be
assumed by AEI, of approximately $855 million.

     The directors of Zeigler have unanimously approved the AEI transaction and
recommend that Zeigler's shareholders accept the AEI offer and tender their
shares.

     The merged company will be the fifth largest coal producer in the United
States, with annual sales of more than 60 million tons and annual revenues of
approximately $1.4 billion. The combined company will have over 2.7 billion
tons of coal reserves, and total assets of approximately $1.8 billion.

     Under the terms of the merger agreement, Zeigler Acquisition Corporation,
a wholly-owned subsidiary of AEI, will promptly commence a tender offer for all
of the outstanding shares of Zeigler at a net price of $21.25 per share in
cash. Tender offer documents are expected to be mailed to Zeigler stockholders
during the week of August 3, 1998. Certain stockholders and directors of
Zeigler owning an aggregate of 9,881,995 shares, representing approximately 33%
of Zeigler's common stock, have agreed to tender their shares in the tender
offer.

     The tender offer will be conditioned upon: (1) the tender of a minimum of
90% of Zeigler's outstanding shares of common stock on a fully diluted basis;
(2) the expiration or termination of the waiting period under the
Hart-Scott-Rodino Antitrust Improvement Act of 1976; (3) AEI having obtained
funds pursuant to existing financing commitments sufficient to purchase the
tendered shares and complete the merger; and (4) certain other customary
conditions for transactions of this type. Warburg Dillon Read LLC, a subsidiary
of UBS AG, has arranged the committed financing required for the transaction.

     In the merger to occur following the consummation of the tender offer,
each share of Zeigler common stock outstanding and not tendered pursuant to the
offer will be converted into the right to receive $21.25 in cash. There are
currently approximately 28,222,671 shares of Zeigler common stock outstanding.

     Zeigler common stock is traded on the New York Stock Exchange. The last
reported sale price of the common stock on Monday, August 3, 1998 was $15.9375.

<PAGE>

     AEI mines and markets coal from Kentucky, West Virginia, Indiana, Tennessee
and Colorado, principally serving mid-to-low sulfur Central and Southern
Appalachian demand. Zeigler operates seven active underground and surface coal
mining complexes located in Kentucky, West Virginia, Ohio, Illinois and
Wyoming.


     /Contact: John Baum, Chief Financial Officer, 606-928-3433/



<PAGE>

                                                                Exhibit 99(b)(1)


                                         [UBS Credit Facility Commitment Letter]

                                       UBS AG
                                          
                                  STAMFORD BRANCH
                              677 WASHINGTON BOULEVARD
                             NEW YORK, NEW YORK  06901

                                                                  August 3, 1998

Coal Ventures, Inc.

c/o Addington Enterprises, Inc.
1500 North Big Run Road  
Ashland, Kentucky  41101

                    Re:  Zeigler Coal Acquisition Financing
                         ----------------------------------

Ladies and Gentlemen:

          We understand that Coal Ventures, Inc. (together with its subsidiaries
and any entities it or Addington Enterprises, Inc. or Mr. Larry Addington,
individually, may use or form in connection with the Acquisition (as defined
below), the "COMPANY") is considering a transaction in which the Company would
acquire (the "ACQUISITION") all of the outstanding common stock (the "COMMON
STOCK") of Zeigler Coal Holding Company (the "ACQUIRED BUSINESS"), pursuant to a
merger (the "MERGER") of a wholly owned subsidiary of the Company with the
Acquired Business.  It is understood that the Merger will be preceded by a
tender offer for not less than 90% of the fully-diluted Common Stock (the
"TENDER OFFER") and after consummation of the Tender Offer the Company will
effect a short-form merger with the Acquired Business without any shareholder
approval in accordance with Section 253 of the Delaware General Corporation Law.
You have advised us that the Acquired Business has no classes of capital stock
outstanding (or other equity interests) other than the Common Stock.   In
addition, you have advised us that, in conjunction with the Acquisition, the
Company will refinance approximately $250.0 million of its existing debt and
approximately $110.0 million of the existing debt of the Acquired Business (the
"REFINANCING").  We understand that, prior to the Acquisition, Addington
Enterprises, Inc. and Mr. Larry Addington will contribute all of the outstanding
capital stock of Coal Ventures, Inc. to a holding company ("HOLDINGS"), such
that Coal Ventures, Inc. will be a wholly-owned subsidiary of the Holdings.  In
the event that the Consent referred to below 


<PAGE>

                                         -2-


is obtained prior to the consummation of the Acquisition, it is intended that
Coal Ventures, Inc. will be merged with its wholly owned subsidiary, AEI Holding
Company, Inc., such that AEI Holding Company, Inc. will be a direct wholly owned
subsidiary of Holdings.  References to the Company herein shall be deemed to
include the Acquired Business on a post-Acquisition basis.  In the event that
the Consent is not obtained, AEI Holding Company, Inc. will not be a party to
the Financing Documents (as defined below).

          We further understand that up to approximately $1.350 billion of new
funds are required to consummate the Acquisition, effect the Refinancing, to
issue approximately $145.0 million in letters of credit relating to industrial
revenue bonds of the Acquired Business, to pay fees and expenses in connection
with the Acquisition and the Refinancing and to provide approximately $130.0
million of working capital availability to the Company on a post-Acquisition
basis (collectively, the "TRANSACTIONS").  In addition to the foregoing,
approximately $10.0 million of the Bridge Loans and/or Credit Facility will be
used for the acquisition of Kindill Mining Inc.  Of such amount, up to $500.0
million would be provided by the issuance by the Company of senior subordinated
debt (the "SUBORDINATED NOTES"), up to $100.0 million would be provided by the
issuance by Holdings of deferred interest senior debt of Holdings (the proceeds
of which would be contributed to the Company in the form of common equity)(the
"DISCOUNT NOTES" and, together with the Subordinated Notes, the "DEBT
SECURITIES"), up to $450.0 million would be provided through secured term loan
facilities made available to the Company, and up to $300.0 million would be
provided through a secured revolving credit facility made available to the
Company (together with the term facilities, the "CREDIT FACILITY").  To the
extent that the issuance of the Subordinated Notes is not consummated prior to
the consummation of the Acquisition and the Refinancing, the Company will raise
gross cash proceeds of up to $500.0 million pursuant to an unsecured senior
subordinated bridge loan (the "COMPANY BRIDGE LOAN") which would be anticipated
to be replaced with the Subordinated Notes and to the extent that the issuance
of the Discount Notes is not consummated prior to the consummation of the
Acquisition and the Refinancing, Holdings will raise gross cash proceeds of up
to $100.0 million pursuant to an unsecured senior bridge loan (the "HOLDINGS
BRIDGE LOAN" and, together with the Company Bridge Loan, the "BRIDGE LOANS")
which would be anticipated to be replaced with the Discount Notes.  You have
advised us that, other than the debt referred to in this paragraph, after giving
effect to the Acquisition and the Refinancing, (x) none of the Company, the
Acquired 


<PAGE>

                                         -3-


Business or any of their subsidiaries will have any debt outstanding, except as
set forth on Schedule 1 attached hereto, and (y) neither the Acquired Business
nor any of the subsidiaries of the Company or the Acquired Business will have
any equity interests outstanding.  You have advised us that, in order to effect
the merger of Coal Ventures, Inc. with and into AEI Holding Company, Inc., the
obtaining of consents and waivers (the "CONSENT") from the requisite holders of
the 10% Series B Senior Notes due 2007 of AEI Holding Company, Inc. (the
"EXISTING NOTES") will be necessary, and that it is the Company's intention to
seek to obtain such Consent as soon as practicable after the execution of the
Acquisition Agreement referred to below.

          In connection with the Transactions, (i) the Company has (prior to the
execution of this letter) engaged one or more investment banks to sell or place
the Debt Securities for aggregate gross proceeds of up to $600.0 million and to
sell or place debt securities of the Company to refinance any bridge or other
temporary debt financing of the Company incurred in connection with the
Transactions; and (ii) you have received a commitment from UBS AG to provide the
Bridge Loans (the "UBS BRIDGE FINANCING COMMITMENT LETTER").

          You have requested that UBS AG, Stamford Branch (the "LENDER") commit
to provide to you funds in the amount of up to $750.0 million under the Credit
Facility to be made available as described in Section 1 hereof.  Drawings under
the Credit Facility, together with the proceeds of the Debt Securities and/or
Bridge Loans, are to be used (i) to finance the Acquisition, (ii) to effect the
Refinancing and (iii) to pay fees and expenses incurred in connection with the
Transactions.

          Accordingly, subject to the terms and conditions set forth or
incorporated in this letter, the Lender agrees with you as follows:

          Section 1.     CREDIT FACILITY.  The Lender hereby commits, subject to
the terms and conditions hereof and in the summary term sheet attached hereto as
EXHIBIT A (the "TERM SHEET") and in the letter of even date herewith addressed
to the undersigned by you providing among other things for certain fees relating
to the Credit Facility (the "FEE LETTER"), to provide to the Company senior
secured credit facilities aggregating $750.0 million. The Credit Facility will
provide for senior secured term loans of up to $450.0 million, such amount to be
allocated among (i) a Term Loan A Facility in an aggregate principal amount of
$150.0 million (the "TERM LOAN A FA-


<PAGE>

                                         -4-


CILITY"), and (ii) a Term Loan B Facility in an aggregate principal amount of
$300.0 million (the "TERM LOAN B FACILITY" and together with the Term Loan A
Facility, the "TERM LOAN FACILITIES"), which will be available in a single
drawing at the consummation of the Acquisition (the "CLOSING DATE").  The Credit
Facility will also provide for a senior secured revolving credit facility (the
"REVOLVING CREDIT FACILITY") of up to $300.0 million.  The proceeds of the
Credit Facility shall be used solely for the purposes described above.  The
principal terms of the Credit Facility are summarized in the Term Sheet.  The
effectiveness of this commitment is conditioned upon your acceptance of this
letter and the Fee Letter, and the Lender's receipt of executed counterparts
thereof.

          Unless the Lender's commitment hereunder shall have been terminated
pursuant to Section 6, the Lender shall have the exclusive right to provide the
Credit Facility or other bank financing required in connection with the
Transactions.

          It is understood and agreed that the Lender shall be entitled, with
your consent (which shall not be unreasonably withheld), to change the structure
(including the establishment of sub-facilities and/or reallocating commitment
amounts among the facilities), terms and amounts of the Credit Facility if the
Lender deems such changes advisable in order to ensure a successful syndication
of the Credit Facility; provided, that, the aggregate commitment under the
Credit Facility remains the same.

          The Company hereby represents and covenants that (a) all information
other than the Projections (as defined below) and other than any reserve studies
prepared by third parties, which has been or is hereafter made available to the 
Lender by the Company or any of the Company's respective representatives,
advisors or affiliates in connection with the transactions contemplated hereby
(the "INFORMATION") is, or in the case of Information made available after the
date hereof will be, complete and correct in all material respects and does not
and will not contain any untrue statement of a material fact or omit to state a
material fact necessary to make the statements contained therein, in the light
of the circumstances under which such statements were or are made, not
misleading, (b) all financial projections concerning the Company or the Acquired
Business that have been or are hereafter made available to the Lender by the
Company or any of the Company's representatives, advisors or affiliates in
connection with the transactions contemplated hereby (the "PROJECTIONS") have
been or, in the case of Projections made available after the date hereof, 


<PAGE>

                                         -5-


will be prepared in good faith based upon reasonable assumptions and (c) the
contracts and other rights listed on Annex B are the only contracts material to
the business and operations of the Company (after giving effect to the Merger)
which require consents in order to collaterally assign or pledge the Company's
interest therein.  You agree to supplement the Information and the Projections
from time to time until the Closing Date so that the representation and warranty
made in the preceding sentence is correct on the Closing Date.  In arranging and
syndicating the Credit Facility, the Lender will be using and relying on the
Information and the Projections without independent verification thereof.  The
representations and covenants contained in this paragraph shall remain effective
until a definitive financing agreement is executed and thereafter the disclosure
representations contained herein shall be superseded by those contained in such
definitive financing agreement.

          Section 2.     FINANCING DOCUMENTATION.  The Credit Facility and the
funding thereunder will be governed by definitive loan and related agreements
and documentation (collectively, the "FINANCING DOCUMENTATION") in form and
substance satisfactory to the Lender.  The Financing Documentation shall be
prepared by Cahill Gordon & Reindel, special counsel to the Lender.  The
Financing Documentation shall contain such covenants, terms and conditions as
are consistent with this letter and the Term Sheet and such other customary
covenants, terms, conditions, representations, warranties, events of default and
remedies provisions as shall be reasonably satisfactory to the Lender and you.

          Section 2.     CONDITIONS.  The obligation of the Lender under
Section 1 of this letter to provide the Credit Facility and to make any loan
thereunder is subject to fulfillment of conditions precedent typical in the
context of an acquisition, including the payment of all fees due and owing under
the Fee Letter and the following:

          (a)  FINANCING AND OTHER DOCUMENTATION.  The Company and the Lender
     shall have entered into the Financing Documentation relating to the Credit
     Facility and the transactions contemplated thereby, on terms consistent
     with the Term Sheet and otherwise in form and substance satisfactory to the
     Lender.  The Company shall have entered into definitive documentation on
     terms consistent with the UBS Bridge Financing Commitment Letter in form
     and substance satisfactory to the Lender with respect to the Bridge Loans
     (collectively with all documents and instruments related thereto or
     delivered in connection therewith, the 


<PAGE>

                                         -6-


     "BRIDGE DOCUMENTS") providing for commitments thereunder in an amount that
     is, together with the borrowings under the Credit Facility, sufficient to
     consummate the Transactions.  The Company shall have entered into
     definitive documentation in connection with all aspects of the Refinancing
     as it relates to indebtedness of the Acquired Business, in each case on
     terms and conditions, and in form and substance, satisfactory to the Lender
     and such documentation shall be in full force and effect. Such
     documentation shall provide for all aspects of the Refinancing, including
     the release of all liens and other security arrangements to the extent
     required by the terms of the Financing Documentation, to occur at or prior
     to the time of the consummation of the Acquisition.

          (b)  NO ADVERSE CHANGE OR DEVELOPMENT, ETC.  (i) The  Acquired
     Business shall not have sustained any loss or interference with respect to
     its business or properties from fire, flood, hurricane, accident or other
     calamity, whether or not covered by insurance, or from any labor dispute or
     any legal or governmental proceeding, which loss or interference, in the
     reasonable judgment of the Lender, has had or has a material adverse effect
     on the business, condition (financial or other), or operations of the
     Acquired Business and its subsidiaries taken as a whole and there shall not
     have been, in the reasonable judgment of the Lender, any material adverse
     change in the business, condition (financial or other), or operations of
     the Acquired Business and its subsidiaries taken as a whole; (ii) trading
     generally shall not have been suspended or materially limited on or by, as
     the case may be, any of the New York Stock Exchange, the American Stock
     Exchange or the National Association of Securities Dealers, Inc; (iii) a
     general moratorium on commercial banking activities in New York shall not
     have been declared by either Federal or New York State governmental
     authorities; and (iv) there shall not have occurred any outbreak or
     escalation of hostilities or any material adverse change in financial
     markets or any calamity or crisis that, in the reasonable judgment of the
     Lender, makes it impracticable to sell or syndicate the Credit Facility. 
     As used in the previous sentence, "material adverse change in financial
     markets" shall mean a decline of 12% or more in the Dow Jones Industrial
     Average from the date of this letter..

          (c)  NO DEFAULTS.  The consummation of the Transactions, borrowings
     under the Bridge Loans and borrowings under the Credit Facility will not
     cause or result in any 


<PAGE>

                                         -7-


     breach or default (including any event, which, with notice or lapse of time
     or both would be a breach or a default) or trigger any repurchase
     requirements under any of the terms or provisions of any of the instruments
     or agreements of the Company, the Acquired Business or any affiliate of the
     Company or the Acquired Business to remain outstanding after the
     consummation of the Transactions.

          (d)  CONSUMMATION OF THE ACQUISITION.  The Company shall have entered
     into an acquisition agreement with respect to the Acquired Business on
     terms and in form and substance reasonably satisfactory to the Lender (the
     "ACQUISITION AGREEMENT").  All material conditions in the Acquisition
     Agreement shall have been satisfied, and not waived or modified except with
     the consent of the Lender (which shall not be unreasonably withheld), and
     all covenants in the Acquisition Agreement shall have been satisfied
     (without waiver or modification) in all material respects and all
     representations and warranties contained therein shall be true and correct
     in all material respects (without waiver or modification).  Funding under
     the Credit Facility and consummation of the Tender Offer and Merger shall
     occur as outlined in Annex A hereto.  In the event that the Merger is to be
     preceded by the Tender Offer, the Merger shall be structured so that it
     will be consummated within one business day of the consummation of the
     Tender Offer.

          (e)  LEGAL AND SOLVENCY OPINIONS.  As of the Closing Date, the Lender
     shall have received (x) legal opinions from attorneys, and in form and
     substance, reasonably satisfactory to the Lender regarding such matters
     relating to the Company, the Acquired Business and the Transactions as the
     Lender shall reasonably request and (y) a solvency opinion from experts,
     and in form and substance, reasonably satisfactory to the Lender and the
     Board of Directors of Ziegler, setting forth the conclusion that, after
     giving effect to the Transactions, the making of the Bridge Loans, the
     funding of the Credit Facility, the Company is not insolvent and will not
     be rendered insolvent by the Transactions and the related borrowings and
     will not be left with unreasonably small capital with which to engage in
     its business and will not have incurred debts beyond its ability to pay
     such debts as they mature.

          (f)  APPLICABLE LAW.  The consummation of the Transactions, borrowings
     under the Bridge Loans and borrowings under the Credit Facility shall be in
     compliance with all 


<PAGE>

                                         -8-


     applicable statutes, laws, rules and regulations of all applicable
     governmental and regulatory agencies and authorities.  There shall not
     exist any judgment, order, injunction or other restraint prohibiting or
     delaying or imposing conditions upon consummation of any portion of the
     Transactions, the making of the Bridge Loans and the making of loans under
     the Credit Facility.

          (g)  LITIGATION.  No litigation or similar proceeding (governmental or
     other) shall exist or be threatened with respect to the Company, the
     Acquired Business or any of the respective affiliates which the Lender
     shall determine is reasonably likely to have a material adverse effect on
     the Company or the Acquired Business, the Financing Documentation or the
     making of the loans under the Credit Facility or any of the other financing
     arrangements contemplated herein.

          Section 4.     INDEMNIFICATION.  The Company agrees to indemnify and
hold harmless the Lender and its affiliates (including, without limitation, any
controlling person) and the directors, officers, employees and agents of the
foregoing parties (collectively, the "INDEMNIFIED PERSONS") from and against any
and all losses, claims, demands, damages, liabilities and other expenses (or
actions or other proceedings commenced or threatened in relation thereto) that
may arise out of or in any way relate to or result from the transactions
contemplated by  this letter or relate to or in any way arise from any proposed
or actual use of the proceeds of the Credit Facility, and to reimburse each
Indemnified Person for any reasonable legal or other expenses incurred in
connection with investigating, preparing to defend or defending against any such
loss, claim, demand, damage, liability or action or other proceeding (whether or
not such Indemnified Person is a party to any action or proceeding out of which
any such expenses arise).  The Company will not, however, be responsible for any
such losses, claims, demands, damages, liabilities or expenses of any
Indemnified Person that are finally judicially determined to have arisen out of
the gross negligence or bad faith of such Indemnified Person. The Company shall
not be liable for any settlement of any proceeding effected without its written
consent, but if settled with such consent or if there be a final judgment for
the plaintiff, the Company agrees to indemnify the Indemnified Person from and
against any loss or liability by reason of such settlement or judgment subject
to the rights of the Company in this paragraph to claim exemption from its
indemnity obligations.  The Company shall not, without the prior written consent
of any Indemnified Person, effect any settlement of any 


<PAGE>

                                         -9-


pending or threatened proceeding in respect of which such Indemnified Person is
or could have been a party and indemnity could have been sought hereunder by
such Indemnified Person, unless such settlement includes an unconditional
release of such Indemnified Person from all liability or claims that are the
subject matter of such proceeding.  The Company's obligation to indemnify the
Indemnified Persons and pay such expenses shall remain in effect regardless of
whether any Financing Documentation is signed.  The Lender shall not be liable
to any other person for consequential damages which may be alleged as a result
of this letter or the transactions contemplated hereby.

          Section 5.     EXPENSES.  In addition to any fees that may be payable
to the Lender hereunder and in the Fee Letter and regardless of whether any of
the transactions contemplated by this letter are consummated, this letter
agreement is terminated, the Financing Documentation is executed and delivered
or any loans are made under the Credit Facility, the Company hereby agrees to
reimburse the Lender for all reasonable fees and disbursements of legal counsel
and consultants, including but not limited to the fees and disbursements of
Cahill Gordon & Reindel, the Lender's special counsel, and all of the Lender's
travel and other reasonable out-of-pocket expenses incurred in connection with
the Transactions or otherwise arising out of the Lender's commitment hereunder.

          Section 6.     TERMINATION.  The Lender's commitment hereunder to
provide the Credit Facility shall terminate, unless expressly agreed to by the
Lender in its sole discretion to be extended to another date, on the earlier of
(A) October 15, 1998 if the Term Loans under the Credit Facility shall not have
funded; (B) the termination of the agreement to consummate the Acquisition in
accordance with the terms of the Acquisition Agreement and (C) immediately after
the making of the loans under the Credit Facility on the Closing Date.  No such
termination of such commitment shall affect your obligations under Sections 4,
5, 8 and 9 hereof or this Section 6, which shall survive any such termination.

          Section 7.     ASSIGNMENT.  This letter shall not be assignable by any
party hereto without the prior written consent of the other parties (other than,
in the case of the Lender, to an affiliate of the Lender, it being understood
that any such affiliate shall be subject to the restrictions set forth in this
Section 7); PROVIDED, HOWEVER, that the Lender shall have the right, in its sole
discretion to syndicate its commitment to provide the Credit Facility among
banks or other financial 


<PAGE>

                                         -10-


institutions pursuant to the Financing Documentation or otherwise and to sell,
transfer or assign all or any portion of, or interests or participations in, the
loans under the Credit Facility and any notes issued in connection therewith;
PROVIDED, FURTHER, that upon delivery by the Lender of a commitment letter for
all or a portion of the Credit Facility from a reputable financial institution
containing terms no less favorable to the Company than the terms hereof, the
Lender shall be fully relieved of its obligations hereunder to the extent of the
commitment set forth in such commitment letter.  Any financial institution that
executes and delivers such a commitment letter shall become a "Lender"
hereunder.  In connection with this commitment, the Company understands that the
undersigned intends to commence syndication of the Credit Facility promptly
after the execution hereof by the Company, and the Company agrees actively to
assist the undersigned in achieving a syndication that is satisfactory to the
undersigned.  Such syndication will be carried out in consultation with the
Company and will be accomplished by a variety of means including direct contact
during the syndication between senior management, representatives and advisors
of the Company and the prospective syndicate members.  In addition, the Company
hereby agrees (i) to provide the undersigned and other prospective syndicate
members with all information reasonably deemed necessary to the undersigned to
complete syndication, including information relating to the Acquired Business,
(ii) to assist the undersigned in preparing an information memorandum to be used
in connection with the syndication activities and (iii) to attend, and to cause
the persons referred to in the preceding sentence to attend, one or more
meetings of prospective syndicate members.  The Company agrees that if any other
financing activities (whether in the bank or securities markets) being conducted
or proposed to be conducted by or on behalf of any of the entities comprising
the Company or its affiliates could, in the judgment of the undersigned, disrupt
or otherwise materially adversely affect the successful syndication of the
Credit Facility, the Company will cause such other financing activities to be
coordinated with the syndication of the Credit Facility to avoid disruption or
adverse impacts on the syndication activities contemplated hereby.

          Section 8.     CONFIDENTIALITY. This letter is confidential and shall
not be disclosed by you to any person other than your attorneys and other
advisors, and to the Acquired Business and its attorneys and other advisors, and
then only on a confidential basis and in connection with the Acquisition and
other related transactions contemplated herein.  Additionally, you may make such
disclosures of this letter as are required by law 


<PAGE>

                                         -11-


or judicial process or as may be required or appropriate in response to any
summons or subpoena or in connection with any litigation, it being understood
that in such event you shall first give the Lender prior written notice thereof.
Notwithstanding the foregoing, any disclosures required under the Securities
Exchange Act may be made in connection with the Tender Offer. If this letter
agreement is not accepted by you as provided in the final paragraph of this
letter, you are directed to immediately return this letter (and copies hereof)
to the undersigned.

          Section 9.     MISCELLANEOUS.  THIS LETTER SHALL BE GOVERNED BY, AND
CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE  STATE OF NEW YORK WITHOUT REGARD
TO THE PRINCIPLES GOVERNING CONFLICTS OF LAWS.  ANY RIGHT TO TRIAL BY JURY WITH
RESPECT TO ANY CLAIM OR ACTION ARISING OUT OF THIS AGREEMENT OR CONDUCT IN
CONNECTION WITH THIS ENGAGEMENT IS HEREBY WAIVED.  YOU HEREBY SUBMIT TO THE
NON-EXCLUSIVE JURISDICTION OF THE FEDERAL AND NEW YORK STATE COURTS LOCATED IN
THE CITY OF NEW YORK IN CONNECTION WITH ANY DISPUTE RELATED TO THIS AGREEMENT OR
ANY OF THE MATTERS CONTEMPLATED HEREBY.  This letter embodies the entire
agreement and understanding between you and the Lender and supersedes all prior
agreements and understandings relating to the subject matter hereof.  This
letter may be executed in any number of counterparts, each of which shall be an
original, but all of which shall constitute one instrument. 

          The Lender reserves the right to employ the services of its affiliates
(including Warburg Dillon Read LLC ("WDRI") in providing services contemplated
by this letter and to allocate, in whole or in part, to WDRI certain fees
payable to the Lender in such manner as the Lender and WDRI may agree in their
sole discretion.  You acknowledge that the Lender may share with any of its
affiliates (including WDRI) and such affiliates may share with the Lender (in
each case, subject to any confidentiality agreements applicable thereto), any
information related to you or your affiliates and the Acquired Business
(including information relating to creditworthiness), the Transactions or the
Acquisition or the financing therefor.


<PAGE>

                                         -12-


          If you are in agreement with the foregoing, please sign and return to
the Lender at 677 Washington Boulevard, Stamford, Connecticut  06901, the
enclosed copy of this letter no later than 5:00 p.m., New York time, on August
3, 1998, whereupon the undertakings of the parties shall become effective to the
extent and in the manner provided hereby.  This offer shall terminate if not so
accepted by you on or prior to that time.

                                        Very truly yours,

                                        UBS AG

                                        By:  /s/ Gary Riddell
                                             ----------------------------
                                        Name:  Gary Riddell
                                        Title: Executive Director Credit Risk
                                               Management

                                        By:  /s/ Michael Y. Leder
                                             ----------------------------
                                        Name:
                                        Title:

                                        WARBURG DILLON READ LLC

                                        By:  /s/ Michael Y. Leder
                                             ----------------------------
                                        Name:  Michael Y. Leder
                                        Title: Executive Director Leveraged
                                               Finance

                                        By:  /s/ Kay Ahlburg
                                             ----------------------------
                                        Name:  Kay Ahlburg
                                        Title: Executive Director Leveraged
                                               Finance

Accepted and Agreed to as of the 
date first above written:

COAL VENTURES, INC.

By:  /s/ Donald P. Brown
     ----------------------------
     Name:  Donald P. Brown
     Title: President


<PAGE>

                                   CREDIT FACILITY

                                SUMMARY TERM SHEET (1)


BORROWERS, CO-OBLIGORS
AND GUARANTORS:                         Each of the entities comprising the
                                        Company as shall be determined by the
                                        Lender (other than Bowie Resources,
                                        Limited, Yankeetown Dock Corporation,
                                        and, until the Consent has been
                                        obtained, AEI Holding Company, Inc.)
                                        (collectively, the "BORROWER").

LENDER:                                 UBS AG, Stamford Branch.

FACILITIES TYPE AND AMOUNT:             (i) $450 million senior secured term
                                        loan facility consisting of a (i) a Term
                                        Loan A Facility in an aggregate
                                        principal amount of $150.0 million (the
                                        "TERM LOAN A FACILITY"), and (ii) a Term
                                        Loan B Facility in an aggregate
                                        principal amount of $300.0 million (the
                                        "TERM LOAN B FACILITY" and together with
                                        the Term Loan A Facility, the "TERM LOAN
                                        FACILITIES"); and

                                        (ii) $300 million senior secured
                                        revolving credit facility, including a
                                        sublimit for letters of credit to be
                                        determined (the "REVOLVING CREDIT
                                        FACILITY" and together with the Term
                                        Loan Facilities, the "CREDIT FACILITY").

MATURITY:                               The commitment to provide the Credit
                                        Facility shall automatically expire on
                                        October 15, 1998 


- ----------

(1)  Capitalized terms used herein and not defined herein shall have the
     meanings provided in the credit facility commitment letter to which this
     summary term sheet is attached.


<PAGE>

                                         -2-


                                        if the Term Loans have not been made. 
                                        DOMESTIC TERM LOAN FACILITIES: The Term
                                        Loan A Facility will mature on the date
                                        five years after the Closing Date, the
                                        Term Loan B Facility will mature on the
                                        date seven years after the Closing Date,
                                        and the Revolving Credit Facility will
                                        mature on the date five years after the
                                        Closing Date.


                                        The Term Loan A Facility will amortize
                                        on a quarterly basis in amounts to be
                                        determined.

                                        The Term Loan B Facility will amortize
                                        on a quarterly basis, with nominal
                                        amounts in the first five years and
                                        thereafter in amounts to be determined.

COMMITMENT FEES:                        Unused Commitment Fees:  Initially 0.50%
                                        per annum on undrawn committed amount
                                        under the Revolving Credit Facility
                                        payable in cash quarterly; thereafter as
                                        determined pursuant to a grid-based test
                                        adjusted in accordance with the
                                        financial performance of the Borrower to
                                        be mutually agreed upon by the Borrower
                                        and the Lender.

USE OF PROCEEDS:                        Term Loan Facilities:  To finance the
                                        Acquisition, to effect the Refinancing,
                                        and to pay related fees and expenses.

                                        Revolving Credit Facility:  To issue
                                        letters of credit relating to existing
                                        industrial revenue bonds of the Acquired
                                        Business, to finance the Acquisition, to
                                        effect the Refinancing, to pay related
                                        fees and expenses and to provide working
                                        capital avail-


<PAGE>

                                         -3-


                                        ability after the consummation of the
                                        Acquisition.

INTEREST RATE:                          At the option of the Borrower as
                                        follows:  LIBOR plus the Applicable
                                        LIBOR Spread or ABR plus the Applicable
                                        ABR Spread, in each case on any of the
                                        Credit Facilities.  LIBOR borrowings may
                                        have interest periods of 1, 2, 3 or 6
                                        months at the election of the Borrower. 
                                        The "Applicable LIBOR Spread" shall
                                        initially be (i) under the Revolving
                                        Credit Facility, 2.50% PER ANNUM; (ii)
                                        under the Term Loan A Facility, 2.50%
                                        PER ANNUM; and (iii) under the Term Loan
                                        B Facility, 2.75% PER ANNUM. 
                                        Thereafter, the Applicable LIBOR Spread
                                        shall be determined pursuant to a
                                        grid-based test adjusted in accordance
                                        with the financial performance of the
                                        Borrower to be mutually agreed upon by
                                        the Borrower and the Lender.  The
                                        "Applicable ABR Spread" shall be (i)
                                        under the Revolving Credit Facility,
                                        1.50% PER ANNUM; (ii) under the Term
                                        Loan A Facility, 1.50% PER ANNUM; and
                                        (iii) under the Term Loan B Facility,
                                        1.75% PER ANNUM.  "ABR" (Alternate Base
                                        Rate) is the higher of the Prime Rate of
                                        the reference bank set forth in the
                                        Credit Facilities documentation and the
                                        Federal Funds effective rate plus 1/2 of
                                        1%. Interest on loans shall be on the
                                        basis of actual days elapsed in a
                                        360-day year, except that interest on
                                        ABR loans shall be on the basis of
                                        actual days elapsed in a 365-day year. 
                                        Interest will be payable in arrears (i)
                                        on the last day of each LIBOR period and
                                        on the maturity date in respect of LIBOR
                                        based loans and (ii) at the end 


<PAGE>

                                         -4-


                                        of each calendar quarter and on the
                                        maturity date in respect of ABR loans.

LETTERS OF CREDIT FEES:                 A per annum fee equal to the Applicable
                                        LIBOR Spread will accrue on the face
                                        amount of outstanding letters of credit
                                        payable quarterly in arrears.  Fronting
                                        fees of 0.25% will be payable to the
                                        issuing bank; customary issuance and
                                        administrative fees will be payable to
                                        the issuing bank.

SECURITY:                               Loans under the Credit Facilities will
                                        be secured by perfected first priority
                                        security interests in (i) all of the
                                        capital stock of the Company and all
                                        capital stock of its subsidiaries owned
                                        by the Company and its subsidiaries,
                                        (ii) all of the capital stock of each of
                                        the entities comprising the Acquired
                                        Business, and (iii) all accounts
                                        receivable, inventory, property, plant
                                        and equipment, intangibles, contract
                                        rights, other personal property and real
                                        property of the Company, its
                                        subsidiaries and the Acquired Business,
                                        except for (a) contract and other rights
                                        that cannot be collaterally assigned or
                                        pledged without third party consents and
                                        listed on Annex B hereto (b) shares of
                                        Ziegler Coal Holding Company which would
                                        violate applicable margin requirements,
                                        (c) such other assets which, in the
                                        reasonable judgment of the Lenders, in
                                        the aggregate are not material to the
                                        business or operations of Borrower and
                                        (d) such other exceptions as the Lenders
                                        may agree to.

OPTIONAL PREPAYMENT:                    The Borrower may prepay borrowings under
                                        the Credit Facility, 


<PAGE>

                                         -5-


                                        in whole or in part, at any time at 100%
                                        of the principal amount thereof plus
                                        accrued interest thereon plus customary
                                        breakage costs.

MANDATORY PREPAYMENT:                   The Credit Facilities will be required
                                        to be prepaid with (a) 75% of annual
                                        Excess Cash Flow (to be defined) (such
                                        percentage to be reduced to 50% with
                                        respect to any fiscal year if the
                                        leverage ratio at the end of such fiscal
                                        year shall be less than 3.5:1.0,
                                        (b) 100% of the net proceeds (including
                                        insurance proceeds if not reinvested
                                        within a specified time period or if
                                        above a threshold amount) of asset sales
                                        and other asset dispositions by Borrower
                                        for proceeds in excess of a certain
                                        threshold to be mutually agreed, with
                                        certain exceptions to be mutually
                                        agreed, (c) 100% of the net proceeds of
                                        the issuance or incurrence of debt
                                        (other than the Take-out Securities if
                                        the Bridge Loan is drawn down) or of any
                                        sale and lease-back by Borrower for
                                        proceeds in excess of a certain
                                        threshold to be mutually agreed, and
                                        (d) 50% of the net proceeds from any
                                        issuance of equity securities in any
                                        public offering or private placement or
                                        from any capital contribution.

                                        Mandatory prepayments will be applied
                                        PRO RATA among the Term Loan Facilities
                                        based on the aggregate principal amount
                                        of Term Loans then outstanding under
                                        each such Term Loan Facility.  Any
                                        application to (x) the Term Loan A
                                        Facility shall be applied PRO RATA to
                                        the remaining scheduled amortization
                                        payments thereunder and (y) the Term
                                        Loan B Facility 


<PAGE>

                                         -6-


                                        shall be applied in inverse order of
                                        maturity to the remaining amortization
                                        payments thereunder.  Notwithstanding
                                        the foregoing, any holder of Term Loans
                                        under the Term Loan B Facility, to the
                                        extent that Term Loans are then
                                        outstanding under the Term A Facility,
                                        may elect not to have mandatory
                                        prepayments applied to such holder's
                                        Term Loans under the Term Loan B
                                        Facility, in which case the aggregate
                                        amount so declined shall be applied to
                                        the Term Loans under the Term Loan A
                                        Facility as provided in clause (x)
                                        above.  To the extent that the amount to
                                        be applied to the prepayment of Term
                                        Loans exceeds the aggregate amount of
                                        Term Loans then outstanding, such excess
                                        shall be applied to the Revolving Credit
                                        Facility to permanently reduce the
                                        commitments thereunder.

                                        Revolving Credit Loans will be
                                        immediately prepaid to the extent that
                                        the aggregate extensions of credit under
                                        the Revolving Credit Facility exceeds
                                        the commitments then in effect under the
                                        Revolving Credit Facility.  To the
                                        extent that the amount to be applied to
                                        the repayment of the Revolving Credit
                                        Loans exceeds the amount thereof then
                                        outstanding, Borrower shall cash
                                        collateralize outstanding Letters of
                                        Credit.

                                        VOTING:   Amendments and waivers of the
                                        Credit Facilities will require the
                                        approval of Lenders holding more than
                                        50% of the aggregate amount of loans and
                                        commitments under the Credit Facilities;
                                        provided, that, the consent of each
                                        Lender affected shall be required 


<PAGE>

                                         -7-


                                        for (i) reductions of principal,
                                        interests or fees or increases of
                                        commitments, (ii) extension of the
                                        maturity of any loans, or (iii) releases
                                        of any substantial collateral.

PARTICIPATION/ASSIGNMENT:               Assignments of loans and commitments to
                                        other Lenders or their affiliates may be
                                        made without restriction and with no
                                        minimum amounts.  Assignments of loans
                                        and commitments to other financial
                                        institutions are subject to the consent
                                        of the Borrower and the Agent (not to be
                                        unreasonably withheld) and must be in
                                        minimum amounts of $5 million. The Agent
                                        will receive a processing fee of $3,500
                                        per each assignment payable by the
                                        assignor and/or the assignee. 
                                        Participations will be unrestricted;
                                        voting rights of participants will be
                                        limited to matters requiring the consent
                                        of each Lender affected (as set forth in
                                        "Voting" above).

COVENANTS:                              The Financing Documentation will contain
                                        customary affirmative and negative
                                        covenants, including, without
                                        limitation, restrictions on the ability
                                        of the Borrower and its subsidiaries to
                                        incur additional indebtedness, pay
                                        certain dividends and make certain other
                                        restricted payments and investments,
                                        impose restrictions on the ability of
                                        the Borrower's subsidiaries to pay
                                        dividends or make certain payments to
                                        the Borrower, create liens, enter into
                                        transactions with affiliates, enter into
                                        transactions resulting in a change of
                                        control, merge, consolidate or transfer
                                        substantially all of their respective
                                        assets and maintain certain fi-


<PAGE>

                                         -8-


                                        nancial ratios and meet other financial
                                        tests (including, but not limited to,
                                        interest coverage, minimum net worth,
                                        maximum capital expenditures and maximum
                                        ratio of debt to EBITDA) in each case
                                        satisfactory to the Lender.

REPRESENTATIONS AND
  WARRANTIES:                           Customary for transactions of this type,
                                        in each case satisfactory to the Lender.

CONDITIONS PRECEDENT:                   Customary for transactions of this type,
                                        in each case satisfactory to the Lender.

EVENTS OF DEFAULT:                      Customary for transactions of this type,
                                        including, without limitation, payment
                                        defaults, covenant defaults, change of
                                        control, bankruptcy and insolvency,
                                        judgments, default on other
                                        indebtedness, subject to, in certain
                                        cases, notice and grace provisions.

GOVERNING LAW AND FORUM:                The State of New York

INDEMNIFICATION AND
  EXPENSE REIMBURSEMENT:                Customary for transactions of this type.


<PAGE>

                                                                         ANNEX A


Set forth below is an outline of the actions contemplated to occur in connection
with the consummation of the tender offer pursuant to the Agreement and Plan of
Merger ("Merger Agreement") among Coal Ventures, Inc., Ziegler Acquisition Corp.
and Ziegler Coal Holding Company ("Ziegler") and the related financing.  On a
date before the scheduled date for acceptance and payment (the "Closing Date")
for the number of shares representing at least 90% of the outstanding shares of
Ziegler, all documentation relating to the Credit Facility shall have been
finalized and executed, to be held in escrow.  The security documents necessary
to pledge, or grant a security interest in, the assets of Ziegler will be
executed by the persons to become the officers of the post-acquisition Ziegler
entity.  Following the acceptance and payment for the tendered shares, (i) the
resignation of the Ziegler directors will immediately become effective and the
Borrower will elect a new Board and (ii) the Merger will be effected as soon as
practicable thereafter.  Promptly upon the Effective Time the security documents
will be released from escrow and will be filed or recorded as promptly as
practicable thereafter.  Counsel for UBS AG, Stamford Branch ("UBS"), and the
Lenders shall be satisfied that, after the tender offer is consummated, and upon
the filing of the necessary security documents, the Lenders will have a
perfected first priority security interest.  Capitalized terms not define herein
have the meanings ascribed to them in the Commitment Letter dated August 3, 1998
between Warburg Dillon Read LLC, UBS, and Coal Ventures, Inc. ("Borrower").

Pre-Closing Date:   -  Financing documents (including all security documents)
                    finalized.  Executed and placed in escrow.

                    -  Borrower receives tender of shares representing at least
                    90% of outstanding Ziegler shares.

Closing Date:       -  Tender of shares accepted by Borrower.

                    -  Credit Agreement becomes effective, Lenders transmit
                    funds to the depository.

                    -  Tendered Shares released to Borrower; Resignation of
                    directors of Ziegler pursuant to terms of Merger Agreement
                    becomes effective.; New Ziegler directors approve merger;
                    merger certificate filed in Delaware.

                    -  Security documents become effective.

                    -  Filing of security documents commences.


<PAGE>

                                                                         ANNEX B
                                          
                                          
                            CONTRACTS REQUIRING CONSENTS
                                          
                                          
                                          
Lease dated November 1 1992, between Big Sandy Company, L.P., as lessor, and
East Kentucky Energy Corporation, as lessee. (Phoenix Land Company reference
number KYL-467)

Lease dated December 1, 1975, between Cotiga Development Company, as lessee, and
East Kentucky Energy Corporation, as lessee. (Phoenix Land Company reference
number WVL-608)

Amended and Restated Agreement for Sale and Purchase of Coal dated July 1, 1996
among Carolina Power & Light Company, Mountaineer Coal Development Company,
Marrow Bone Development Company and Bluegrass Coal Development Company

Agreement for Sale and Purchase of Coal dated July 1, 1996 between Carolina
Power & Light Company and Franklin Coal Sales Company

Agreement for Sale and Purchase of Coal dated April 1, 1995 between Carolina
Power & Light Company and Franklin Coal Sales Company

Agreement for Sale and Purchase of Coal dated January 1, 1971 among Carolina
Power & Light Company, Wolf Creek Collieries, Kermit Coal Company and Massey
Coal Sales Company


<PAGE>

                                                                      SCHEDULE 1
                                          
                         INDEBTEDNESS TO REMAIN OUTSTANDING
                                          
                                          

<PAGE>

                                                                Exhibit 99(b)(2)


                                             [UBS Bridge Loan Commitment Letter]

                                       UBS AG
                                          
                                  STAMFORD BRANCH
                              677 WASHINGTON BOULEVARD
                             NEW YORK, NEW YORK  06901

                                                                  August 3, 1998

Coal Ventures, Inc.
c/o Addington Enterprises, Inc.
1500 North Big Run Road
Ashland, Kentucky  41101

                    Re:  Zeigler Coal Acquisition Financing
                         ----------------------------------

Ladies and Gentlemen:

          We understand that Coal Ventures, Inc. (together with its subsidiaries
and any entities it or Addington Enterprises, Inc. or Mr. Larry Addington,
individually, may use or form in connection with the Acquisition (as defined
below), the "COMPANY") is considering a transaction in which the Company would
acquire (the "ACQUISITION") all of the outstanding common stock (the "COMMON
STOCK") of Zeigler Coal Holding Company (the "ACQUIRED BUSINESS"), pursuant to a
merger (the "MERGER") of a wholly owned subsidiary of the Company with the
Acquired Business.  It is understood that the Merger will be preceded by a
tender offer for not less than 90% of the fully-diluted Common Stock (the
"TENDER OFFER") such that after consummation of the Tender Offer the Company
will effect a short-form merger with the Acquired Business without any
shareholder approval in accordance with Section 253 of the Delaware General
Corporation Law.  You have advised us that the Acquired Business has no classes
of capital stock outstanding (or other equity interests) other than the Common
Stock.   In addition, you have advised us that, in conjunction with the
Acquisition, the Company will refinance approximately $250.0 million of its
existing debt and approximately $110.0 million of the existing debt of the
Acquired Business (the "REFINANCING").  We understand that, prior to the
Acquisition, Addington Enterprises, Inc. and Mr. Larry Addington will contribute
all of the outstanding capital stock of Coal Ventures, Inc. to a holding company
("HOLDINGS"), such that Coal Ventures, Inc. will be a wholly-owned subsidiary of
the Holdings.  In the event that the Consent referred to be-


<PAGE>

                                         -2-


low is obtained prior to the consummation of the Acquisition, it is intended
that Coal Ventures, Inc. will be merged with its wholly owned subsidiary, AEI
Holding Company, Inc., such that AEI Holding Company, Inc. will be a direct
wholly owned subsidiary of Holdings.  References to the Company herein shall be
deemed to include the Acquired Business on a post-Acquisition basis.  In the
event that the Consent is not obtained, AEI Holding Company, Inc. will not be a
party to the Financing Documents (as defined below).

          We further understand that up to approximately $1.350 billion of new
funds are required to consummate the Acquisition, effect the Refinancing, to
issue approximately $145.0 million in letters of credit relating to industrial
revenue bonds of the Acquired Business, to pay fees and expenses in connection
with the Acquisition and the Refinancing and to provide approximately $130.0
million of working capital availability to the Company on a post-Acquisition
basis (collectively, the "TRANSACTIONS").  In addition to the foregoing,
approximately $10.0 million of the Bridge Loan Facility and/or Bank Financing
will be used for the acquisition of Kindill Mining Inc.  Of such amount, up to
$500.0 million would be provided by the issuance by the Company of senior
subordinated debt, up to $100.0 million would be provided by the issuance by
Holdings of deferred interest senior debt of Holdings (the proceeds of which
would be contributed to the Company in the form of common equity), up to $450.0
million would be provided through secured term loan facilities made available to
the Company, and up to $300.0 million would be provided through a secured
revolving credit facility made available to the Company (together with the term
facilities, the "BANK FINANCING"). You have advised us that, other than the debt
referred to in this paragraph, after giving effect to the Acquisition and the
Refinancing, (x) none of the Company, the Acquired Business or any of their
subsidiaries will have any debt outstanding, except as set forth on Schedule 1
attached hereto, and (y) neither the Acquired Business nor any of the
subsidiaries of the Company or the Acquired Business will have any equity
interests outstanding.  You have advised us that, in order to effect the merger
of Coal Ventures, Inc. with and into AEI Holding Company, Inc., the obtaining of
consents and waivers (the "CONSENT") from the requisite holders of the 10%
Series B Senior Notes due 2007 of AEI Holding Company, Inc. (the "EXISTING
NOTES") will be necessary, and that it is the Company's intention to seek to
obtain such Consent as soon as practicable after the execution of the
Acquisition Agreement referred to below.


<PAGE>

                                         -3-


          In connection with the Transactions, (i) the Company has (prior to the
execution of this letter) engaged one or more investment banks to sell or place
debt securities of Holdings and the Company (the "DEBT SECURITIES") for
aggregate gross proceeds of up to $600.0 million and to sell or place debt
securities of the Company to refinance any bridge or other temporary debt
financing of the Company incurred in connection with the Transactions; and
(ii) you have received a commitment from UBS AG to provide the Bank Financing
(the "UBS BANK FINANCING COMMITMENT LETTER").

          You have requested that UBS AG, Stamford Branch (the "LENDER") commit
to provide to Holdings funds in the amount of up to $100.0 million in the form
of a senior bridge loan facility (the "HOLDINGS BRIDGE LOAN") and to the Company
funds in the amount of up to $500.0 million in the form of a senior subordinated
bridge loan facility to be made available as described in Section 1 hereof (the
"COMPANY BRIDGE LOAN" and, together with the Holdings Bridge Loan, the "BRIDGE
LOANS" which will be made under the "BRIDGE LOAN FACILITY").  Drawings under the
Bridge Loan Facility, together with borrowings under the Bank Financing, are to
be used (i) to finance the Acquisition, (ii) to effect the Refinancing and
(iii) to pay fees and expenses incurred in connection with the Transactions.

          Accordingly, subject to the terms and conditions set forth or
incorporated in this letter, the Lender agrees with you as follows:

          Section 1.     BRIDGE LOAN FACILITY.  The Lender hereby commits,
subject to the terms and conditions hereof and in the summary term sheet
attached hereto as EXHIBIT A (the "TERM SHEET") and in the letter of even date
herewith addressed to the undersigned by you providing among other things for
certain fees relating to the Bridge Loan Facility (the "FEE LETTER"), to provide
to Holdings a senior bridge loan facility and to the Company a senior
subordinated bridge loan facility, each of which will be available in a single
drawing at the time of the acceptance of shares pursuant to the Tender Offer
(the "CLOSING DATE") in the amount of up to $100.0 million in the case of the
Holdings Bridge Loan and up to $500.0 million in the case of the Company Bridge
Loan.  The proceeds of the Bridge Loan Facility shall be used solely for the
purposes described above.  The principal terms of the Bridge Loan are summarized
in the Term Sheet.  The effectiveness of this commitment is conditioned upon
your acceptance of this letter and the Fee Letter, and the Lender's receipt of
executed counterparts thereof.


<PAGE>

                                         -4-


          Unless the Lender's commitment hereunder shall have been terminated
pursuant to Section 7, the Lender shall have the exclusive right to provide the
Bridge Loan Facility or other bridge or interim financing required in connection
with the Transactions.

          It is understood and agreed that the Lender shall be entitled, with
your consent (which shall not be unreasonably withheld), to change the structure
(including the establishment of sub-facilities and/or changing the amounts of
the Holding Bridge Loan and the Company Bridge Loan), terms and amounts of the
Bridge Loan Facility if the Lender deems such changes advisable in order to
ensure a successful syndication of the Bridge Loan Facility; provided, that, the
aggregate commitment under the Bridge Loan Facility remains the same.

          The Company hereby represents and covenants that (a) all information
other than the Projections (as defined below) and other than any reserve studies
prepared by third parties, which has been or is hereafter made available to the 
Lender by the Company or any of the Company's respective representatives,
advisors or affiliates in connection with the transactions contemplated hereby
(the "INFORMATION") is, or in the case of Information made available after the
date hereof will be, complete and correct in all material respects and does not
and will not contain any untrue statement of a material fact or omit to state a
material fact necessary to make the statements contained therein, in the light
of the circumstances under which such statements were or are made, not
misleading and (b) all financial projections concerning the Company or the
Acquired Business that have been or are hereafter made available to the Lender
by the Company or any of the Company's representatives, advisors or affiliates
in connection with the transactions contemplated hereby (the "PROJECTIONS") have
been or, in the case of Projections made available after the date hereof, will
be prepared in good faith based upon reasonable assumptions.  You agree to
supplement the Information and the Projections from time to time until the
Closing Date so that the representation and warranty made in the preceding
sentence is correct on the Closing Date.  In arranging and syndicating the
Bridge Loan Facility, the Lender will be using and relying on the Information
and the Projections without independent verification thereof.  The
representations and covenants contained in this paragraph shall remain effective
until a definitive financing agreement is executed and thereafter the disclosure
representations contained herein shall be superseded by those contained in such
definitive financing agreement.


<PAGE>

                                         -5-


          Section 2.     FINANCING DOCUMENTATION.  The Bridge Loan Facility and
the funding thereunder will be governed by definitive loan and related
agreements and documentation (collectively, the "FINANCING DOCUMENTATION") in
form and substance satisfactory to the Lender.  The Financing Documentation
shall be prepared by Cahill Gordon & Reindel, special counsel to the Lender. 
The Financing Documentation shall contain such covenants, terms and conditions
as are consistent with this letter and the Term Sheet and such other customary
covenants, terms, conditions, representations, warranties, events of default and
remedies provisions as shall be reasonably satisfactory to the Lender and you.

          Section 3.     CONDITIONS.  The obligation of the Lender under
Section 1 of this letter to provide the Bridge Loan Facility and to make any
loan thereunder is subject to fulfillment of conditions precedent typical in the
context of an acquisition, including the payment of all fees due and owing under
the Fee Letter and the following:

          (a)  FINANCING AND OTHER DOCUMENTATION.  Holdings, the Company and the
     Lender shall have entered into the Financing Documentation relating to the
     Bridge Loan Facility and the transactions contemplated thereby, on terms
     consistent with the Term Sheet and otherwise in form and substance
     satisfactory to the Lender.  The Company shall have entered into definitive
     documentation on terms consistent with the UBS Bank Financing Commitment
     Letter in form and substance satisfactory to the Lender with respect to the
     Bank Financing (collectively with all documents and instruments related
     thereto or delivered in connection therewith, the "BANK DOCUMENTS")
     providing for commitments thereunder in an amount that is, together with
     the borrowings under the Bridge Loan Facility, sufficient to consummate the
     Transactions.  The Company shall have entered into definitive documentation
     in connection with all aspects of the Refinancing as it relates to the
     Acquired Business, in each case on terms and conditions, and in form and
     substance, satisfactory to the Lender and such documentation shall be in
     full force and effect. Such documentation shall provide for all aspects of
     the Refinancing, including the release of all liens and other security
     arrangements to the extent required by the terms of the Financing
     Documentation, to occur at or prior to the time of the consummation of the
     Acquisition.

          (b)  NO ADVERSE CHANGE OR DEVELOPMENT, ETC.  (i) The  Acquired
     Business shall not have sustained any loss or in-


<PAGE>

                                         -6-


     terference with respect to its business or properties from fire, flood,
     hurricane, accident or other calamity, whether or not covered by insurance,
     or from any labor dispute or any legal or governmental proceeding, which
     loss or interference, in the reasonable judgment of the Lender, has had or
     has a material adverse effect on the business, condition (financial or
     other), or operations of the Acquired Business and its subsidiaries taken
     as a whole and there shall not have been, in the reasonable judgment of the
     Lender, any material adverse change in the business, condition (financial
     or other), or operations of the Acquired Business and its subsidiaries
     taken as a whole; (ii) trading generally shall not have been suspended or
     materially limited on or by, as the case may be, any of the New York Stock
     Exchange, the American Stock Exchange or the National Association of
     Securities Dealers, Inc.; (iii) a general moratorium on commercial banking
     activities in New York shall not have been declared by either Federal or
     New York State governmental authorities; and (iv) there shall not have
     occurred any outbreak or escalation of hostilities or any material adverse
     change in financial markets or any calamity or crisis that, in the
     reasonable judgment of the Lender, makes it impracticable to sell or
     syndicate the Bridge Loan Facility or to proceed with the offer or sale of
     the Securities (as defined below).  As used in the previous sentence,
     "material adverse change in financial markets" shall mean a decline of 12%
     or more in the Dow Jones Industrial Average from the date of this letter.

          (c)  NO DEFAULTS.  The consummation of the Transactions, borrowings
     under the Bridge Loan Facility and borrowings under the Bank Financing will
     not cause or result in any breach or default (including any event, which,
     with notice or lapse of time or both would be a breach or a default) or
     trigger any repurchase requirements under any of the terms or provisions of
     any of the instruments or agreements of the Company, the Acquired Business
     or any affiliate of the Company or the Acquired Business to remain
     outstanding after the consummation of the Transactions.

          (d)  CONSUMMATION OF THE ACQUISITION.  The Company shall have entered
     into an acquisition agreement with respect to the Acquired Business on
     terms and in form and substance reasonably satisfactory to the Lender (the
     "ACQUISITION AGREEMENT").  All material conditions in the Acquisition
     Agreement shall have been satisfied, and not 


<PAGE>

                                         -7-


     waived or modified except with the consent of the Lender (which shall not
     be unreasonably withheld), and all covenants in the Acquisition Agreement
     shall have been satisfied (without waiver or modification) in all material
     respects and all representations and warranties contained therein shall be
     true and correct in all material respects (without waiver or modification).
     Funding under the Bridge Loan Facility and consummation of the Tender Offer
     and Merger shall occur as outlined in Annex A hereto..  In the event that
     the Merger is to be preceded by the Tender Offer, the Merger shall be
     structured so that it will be consummated within one business day of the
     consummation of the Tender Offer.

          (e)  LEGAL AND SOLVENCY OPINIONS.  As of the Closing Date, the Lender
     shall have received (x) legal opinions from attorneys, and in form and
     substance, reasonably satisfactory to the Lender regarding such matters
     relating to the Company, the Acquired Business and the Transactions as the
     Lender shall reasonably request and (y) a solvency opinion from experts,
     and in form and substance, reasonably satisfactory to the Lender and the
     Board of Directors of Ziegler, setting forth the conclusion that, after
     giving effect to the Transactions, the making of the Bridge Loans, the
     funding of the Bank Financing, the Company is not insolvent and will not be
     rendered insolvent by the Transactions and the related borrowings and will
     not be left with unreasonably small capital with which to engage in its
     business and will not have incurred debts beyond its ability to pay such
     debts as they mature.

          (f)  APPLICABLE LAW.  The consummation of the Transactions, borrowings
     under the Bridge Loans and borrowings under the Bank Financing shall be in
     compliance with all applicable statutes, laws, rules and regulations of all
     applicable governmental and regulatory agencies and authorities.  There
     shall not exist any judgment, order, injunction or other restraint
     prohibiting or delaying or imposing conditions upon consummation of any
     portion of the Transactions, the making of loans under the Bridge Loan
     Facility and the making of loans under the Bank Financing.

          (g)  LITIGATION.  No litigation or similar proceeding (governmental or
     other) shall exist or be threatened with respect to the Company, the
     Acquired Business or any of the respective affiliates which the Lender
     shall determine is reasonably likely to have a material adverse effect on 


<PAGE>

                                         -8-


     the Company or the Acquired Business, the Financing Documentation or the
     making of the Bridge Loans, the ability to sell or place the Securities or
     any of the other financing arrangements contemplated herein.

          (h)  CONTRIBUTION.  Immediately upon the funding of the Holdings
     Bridge Loan, Holdings shall invest or contribute the proceeds thereof in
     Coal Ventures, Inc.

          Section 4.     TAKE-OUT FINANCING.  The Company shall take any and
every action necessary or desirable, to the extent within the power of the
Company, so that the Take-Out Bank can, as soon as practicable before or after
the Closing Date, publicly sell or privately place the Securities.  If the
Bridge Loans shall not  have been refinanced in full prior thereto, the Company
shall agree that upon notice by the Take-Out Bank (a "SECURITIES DEMAND"), at
any time and from time to time prior to the first anniversary of the Closing
Date, Holdings, the Company and/or the Acquired Business will cause the issuance
and sale of Securities upon such terms and conditions as specified in the
Securities Demand; PROVIDED that (i) the interest rates (whether floating or
fixed) shall be determined by the Take-Out Bank in light of the then prevailing
market conditions; (ii) the maturity of any Securities shall not be earlier than
the eighth anniversary of the Closing Date; (iii) the Securities will be issued
pursuant to one or more indentures substantially in the form negotiated by the
Company and the Take-Out Bank prior to the Closing Date and which shall contain
such terms, conditions and covenants as are customary for similar financings and
as are reasonably satisfactory in all respects to the Take-Out Bank and its
counsel and the Company and its counsel; and (iv) all other arrangements with
respect to the Securities shall be reasonably satisfactory in all respects to
the Take-Out Bank in light of the then prevailing market conditions.  Before
offering common equity of Holdings in connection with the issuance and sale of
Securities of the Company, the Take-Out Bank will consult with the Company
regarding prevailing market conditions and the advisability of issuing common
equity to facilitate the placement of such Securities.

          Further, if it shall reasonably be determined by the Take-Out Bank
based on the prevailing market conditions that it is necessary and advisable to
sell the Securities with an equity component, Holdings shall issue common equity
to the purchasers of the Securities in such amount as is necessary in order for
Holdings and the Company to receive net proceeds from the sale of the Securities
in an amount sufficient to repay the Bridge Loans in full; PROVIDED that in no
event will Holdings 


<PAGE>

                                         -9-


be required to issue common equity representing more than 5% of its outstanding
common equity (calculated on a fully-diluted basis) pursuant to this sentence.

          Section 5.     INDEMNIFICATION.  The Company agrees to indemnify and
hold harmless the Lender and its affiliates (including, without limitation, any
controlling person) and the directors, officers, employees and agents of the
foregoing parties (collectively, the "INDEMNIFIED PERSONS") from and against any
and all losses, claims, demands, damages, liabilities and other expenses (or
actions or other proceedings commenced or threatened in relation thereto) that
may arise out of or in any way relate to or result from the transactions
contemplated by  this letter or relate to or in any way arise from any proposed
or actual use of the proceeds of the Bridge Loan Facility or the Securities, and
to reimburse each Indemnified Person for any reasonable legal or other expenses
incurred in connection with investigating, preparing to defend or defending
against any such loss, claim, demand, damage, liability or action or other
proceeding (whether or not such Indemnified Person is a party to any action or
proceeding out of which any such expenses arise).  The Company will not,
however, be responsible for any such losses, claims, demands, damages,
liabilities or expenses of any Indemnified Person that are finally judicially
determined to have arisen out of the gross negligence or bad faith of such
Indemnified Person. The Company shall not be liable for any settlement of any
proceeding effected without its written consent, but if settled with such
consent or if there be a final judgment for the plaintiff, the Company agrees to
indemnify the Indemnified Person from and against any loss or liability by
reason of such settlement or judgment subject to the rights of the Company in
this paragraph to claim exemption from its indemnity obligations.  The Company
shall not, without the prior written consent of any Indemnified Person, effect
any settlement of any pending or threatened proceeding in respect of which such
Indemnified Person is or could have been a party and indemnity could have been
sought hereunder by such Indemnified Person, unless such settlement includes an
unconditional release of such Indemnified Person from all liability or claims
that are the subject matter of such proceeding.  The Company's obligation to
indemnify the Indemnified Persons and pay such expenses shall remain in effect
regardless of whether any Financing Documentation is signed.  The Lender shall
not be liable to any other person for consequential damages which may be alleged
as a result of this letter or the transactions contemplated hereby.


<PAGE>

                                         -10-


          Section 6.     EXPENSES.  In addition to any fees that may be payable
to the Lender hereunder and in the Fee Letter and regardless of whether any of
the transactions contemplated by this letter are consummated, this letter
agreement is terminated, the Financing Documentation is executed and delivered
or any loans are made under the Bridge Loan Facility, the Company hereby agrees
to reimburse the Lender for all reasonable fees and disbursements of legal
counsel and consultants, including but not limited to the fees and disbursements
of Cahill Gordon & Reindel, the Lender's special counsel, and all of the
Lender's travel and other reasonable out-of-pocket expenses incurred in
connection with the Transactions or otherwise arising out of the Lender's
commitment hereunder.

          Section 7.     TERMINATION.  The Lender's commitment hereunder to
provide the Bridge Loan Facility shall terminate, unless expressly agreed to by
the Lender in its sole discretion to be extended to another date, on the earlier
of (A) October 15, 1998 if the loans under the Bridge Loan Facility shall not
have funded; (B) the termination of the agreement to consummate the Acquisition
in accordance with the terms of the Acquisition Agreement and (C) immediately
after the making of the loans under the Bridge Loan Facility on the Closing
Date.  No such termination of such commitment shall affect your obligations
under Sections 5, 6, 9 and 10 hereof or this Section 7, which shall survive any
such termination.

          Section 8.     ASSIGNMENT.  This letter shall not be assignable by any
party hereto without the prior written consent of the other parties (other than,
in the case of the Lender, to an affiliate of the Lender, it being understood
that any such affiliate shall be subject to the restrictions set forth in this
Section 8); PROVIDED, HOWEVER, that the Lender shall have the right, in its sole
discretion to syndicate its commitment to provide the Bridge Loan Facility among
banks or other financial institutions pursuant to the Financing Documentation or
otherwise and to sell, transfer or assign all or any portion of, or interests or
participations in, the Bridge Loan and any notes issued in connection therewith;
PROVIDED, FURTHER, that upon delivery by the Lender of a commitment letter for
all or a portion of the Bridge Loan Facility from a reputable financial
institution containing terms no less favorable to the Company than the terms
hereof, the Lender shall be fully relieved of its obligations hereunder to the
extent of the commitment set forth in such commitment letter.  Any financial
institution that executes and delivers such a commitment letter shall become a
"Lender" hereunder.  In connection with this commitment, the Company understands
that the undersigned intends to com-


<PAGE>

                                         -11-


mence syndication of the Bridge Loan Facility promptly after the execution
hereof by the Company, and the Company agrees actively to assist the undersigned
in achieving a syndication that is satisfactory to the undersigned.  Such
syndication will be carried out in consultation with the Company and will be
accomplished by a variety of means including direct contact during the
syndication between senior management, representatives and advisors of the
Company and the prospective syndicate members.  In addition, the Company hereby
agrees (i) to provide the undersigned and other prospective syndicate members
with all information reasonably deemed necessary to the undersigned to complete
syndication, including information relating to the Acquired Business, (ii) to
assist the undersigned in preparing an information memorandum to be used in
connection with the syndication activities and (iii) to attend, and to cause the
persons referred to in the preceding sentence to attend, one or more meetings of
prospective syndicate members.  The Company agrees that if any other financing
activities (whether in the bank or securities markets) being conducted or
proposed to be conducted by or on behalf of any of the entities comprising the
Company or its affiliates could, in the judgment of the undersigned, disrupt or
otherwise materially adversely affect the successful syndication of the Bridge
Loan Facility, the Company will cause such other financing activities to be
coordinated with the syndication of the Bridge Loan Facility to avoid disruption
or adverse impacts on the syndication activities contemplated hereby.

          Section 9.     CONFIDENTIALITY. This letter is confidential and shall
not be disclosed by you to any person other than your attorneys and other
advisors, and to the Acquired Business and its attorneys and other advisors, and
then only on a confidential basis and in connection with the Acquisition and
other related transactions contemplated herein.  Additionally, you may make such
disclosures of this letter as are required by law or judicial process or as may
be required or appropriate in response to any summons or subpoena or in
connection with any litigation, it being understood that in such event you shall
first give the Lender prior written notice thereof.  Notwithstanding the
foregoing, any disclosures required under the Securities Exchange Act may be
made in connection with the Tender Offer.  If this letter agreement is not
accepted by you as provided in the final paragraph of this letter, you are
directed to immediately return this letter (and copies hereof) to the
undersigned.

          Section 10.    MISCELLANEOUS.  THIS LETTER SHALL BE GOVERNED BY, AND
CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE


<PAGE>

                                         -12-


STATE OF NEW YORK WITHOUT REGARD TO THE PRINCIPLES GOVERNING CONFLICTS OF LAWS. 
ANY RIGHT TO TRIAL BY JURY WITH RESPECT TO ANY CLAIM OR ACTION ARISING OUT OF
THIS AGREEMENT OR CONDUCT IN CONNECTION WITH THIS ENGAGEMENT IS HEREBY WAIVED. 
YOU HEREBY SUBMIT TO THE NON-EXCLUSIVE JURISDICTION OF THE FEDERAL AND NEW YORK
STATE COURTS LOCATED IN THE CITY OF NEW YORK IN CONNECTION WITH ANY DISPUTE
RELATED TO THIS AGREEMENT OR ANY OF THE MATTERS CONTEMPLATED HEREBY.  This
letter embodies the entire agreement and understanding between you and the
Lender and supersedes all prior agreements and understandings relating to the
subject matter hereof.  This letter may be executed in any number of
counterparts, each of which shall be an original, but all of which shall
constitute one instrument. 

          The Lender reserves the right to employ the services of its affiliates
(including Warburg Dillon Read LLC ("WDRI") in providing services contemplated
by this letter and to allocate, in whole or in part, to WDRI certain fees
payable to the Lender in such manner as the Lender and WDRI may agree in their
sole discretion.  You acknowledge that the Lender may share with any of its
affiliates (including WDRI) and such affiliates may share with the Lender (in
each case, subject to any confidentiality agreements applicable thereto), any
information related to you or your affiliates and the Acquired Business
(including information relating to creditworthiness), the Transactions or the
Acquisition or the financing therefor.


<PAGE>

                                         -13-


          If you are in agreement with the foregoing, please sign and return to
the Lender at 677 Washington Boulevard, Stamford, Connecticut  06901, the
enclosed copy of this letter no later than 5:00 p.m., New York time, on August
3, 1998, whereupon the undertakings of the parties shall become effective to the
extent and in the manner provided hereby.  This offer shall terminate if not so
accepted by you on or prior to that time.

                                        Very truly yours,

                                        UBS AG

                                        By:  /s/ Gary Riddell
                                             ----------------------------
                                        Name:  Gary Riddell
                                        Title: Executive Director Credit Risk
                                               Management

                                        By:  /s/ Michael Y. Leder
                                             ----------------------------
                                        Name:  Michael Y. Leder
                                        Title: Executive Director Leveraged
                                               Finance

                                        WARBURG DILLON READ LLC
                                        
                                        By:  /s/ Michael Y. Leder
                                             ----------------------------
                                        Name:  Michael Y. Leder
                                        Title: Executive Director Leveraged
                                               Finance

                                        By:  /s/ Kay Ahlburg
                                             ----------------------------
                                        Name:  Kay Ahlburg
                                        Title: Executive Director Leveraged
                                               Finance

Accepted and Agreed to as of the 
date first above written:

COAL VENTURES, INC.

By:  /s/ Donald P. Brown
     ----------------------------
     Name:  Donald P. Brown
     Title: President


<PAGE>

                                                                       EXHIBIT A


                                BRIDGE LOAN FACILITY
                                          
                               SUMMARY TERM SHEET (1)

BORROWERS, CO-OBLIGORS
AND GUARANTORS:                    Holdings, in the case of the Holdings Loan
                                   and Coal Ventures, Inc., in the case of the
                                   Company Loan and each of the subsidiaries of
                                   Coal Ventures, Inc. and any other entity
                                   which is a borrower under, or guarantor of,
                                   the Bank Financing (other than Bowie
                                   Resources, Limited, Yankeetown Dock
                                   Corporation, and, until the Consent has been
                                   obtained, AEI Holding Company, Inc.)
                                   (collectively, the "BORROWER") as shall be
                                   determined by the Lender.

LENDER:                            UBS AG, Stamford Branch.

AMOUNT:                            $100.0 million senior unsecured bridge loan
                                   to Holdings (the "HOLDINGS BRIDGE LOAN");
                                   and $500.0 million senior subordinated
                                   bridge loan to the Company (the "COMPANY
                                   BRIDGE LOAN" and, together with the Holdings
                                   Bridge Loan, the "BRIDGE LOANS").

MATURITY:                          The commitment to provide the Bridge Loan
                                   Facility shall automatically expire on
                                   October 15, 1998 if the loans under the 



- ----------

(1)  Capitalized terms used herein and not defined herein shall have the
     meanings provided in the bridge loan commitment letter to which this
     summary term sheet is attached.


<PAGE>

                                         -2-


                                   Bridge Loan Facility shall not have been
                                   funded.  Any outstanding amount under the
                                   Bridge Loan Facility will be required to be
                                   repaid in full on the earlier of (a) one
                                   year following the Closing Date and (b) the
                                   closing date of any permanent financing;
                                   PROVIDED, HOWEVER, that if the Company shall
                                   have failed to raise permanent financing
                                   before the date set forth in (a) above,
                                   outstanding loans under the Bridge Loan
                                   Facility shall be converted (such date, the
                                   "CONVERSION DATE"), subject to the
                                   conditions outlined under "Conditions to
                                   Conversion of the Bridge Loans", as follows:
                                   the Holdings Bridge Loan shall be converted
                                   into a senior unsecured Holdings term loan
                                   (the "HOLDINGS TERM LOAN") and the Company
                                   Bridge Loan shall be converted into a senior
                                   subordinated Company term loan (the "COMPANY
                                   TERM LOAN" and, together with the Holdings
                                   Term Loan, the "TERM LOANS" and,
                                   collectively with the Bridge Loans, the
                                   "FACILITY") with a maturity on the eighth
                                   anniversary of the Closing Date, in the case
                                   of the Holdings Term Loan and the eighth
                                   anniversary of the Closing Date, in the case
                                   of the Company Term Loan.

CONVERSION FEES:                   3.25% of the accreted value of the initial
                                   amount of the Holdings Term Loan and 2.75%
                                   of the initial principal amount of the
                                   Company Term Loan. 

USE OF PROCEEDS:                   To finance the Acquisition, to effect the
                                   Refinancing and to pay related fees and
                                   expenses.


<PAGE>

                                         -3-


FUNDING DATE:                      Simultaneous with the Closing Date (the
                                   "FUNDING DATE").

INTEREST RATE:

Holdings Bridge Loan and 
Holdings Term Loan:                No interest shall accrue on the Holdings
                                   Bridge Loan.  No interest shall accrue on
                                   the Holdings Term Loan until the fifth
                                   anniversary of the Funding Date.  The
                                   Holdings Bridge Loan and the Holdings Term
                                   Loan, as the case may be, shall accrete at
                                   the rate of three-month LIBOR, reset
                                   monthly, plus initially 7.00% PER ANNUM (the
                                   "INTEREST RATE") and which spread over LIBOR
                                   shall automatically increase by 0.50% for
                                   each period of 90 days (or portion thereof)
                                   that the Holdings Bridge Loan or the
                                   Holdings Term Loan, as the case may be, is
                                   outstanding; PROVIDED, HOWEVER, that the
                                   rate of accretion shall not exceed 18.00%
                                   PER ANNUM at any time.  At any time on or
                                   after the Conversion Date, the Holdings Term
                                   Loan shall, at the election of the Lender,
                                   accrete at a fixed rate PER ANNUM equal to
                                   the Holdings Fixed Rate then in effect.  The
                                   "HOLDINGS FIXED RATE", as of any date of
                                   determination, shall be a rate of accretion
                                   PER ANNUM equal to the then effective yield
                                   on U.S. Treasury securities having ten year
                                   maturities plus 9.25%.  The accretion on the
                                   Holdings Bridge Loan and the Holdings Term
                                   Loan until the fifth anniversary of the
                                   Funding Date shall be on a quarterly bond
                                   equivalent basis.  From and after the fifth
                                   anniversary of the Funding Date, interest
                                   will accrue on the accreted value of the
                                   Holdings Term Loan and be payable 


<PAGE>

                                         -4-


                                   in cash, quarterly, at an interest rate
                                   computed on the same basis as the
                                   computation of the accretion rate above.

Company Bridge Loan and 
Company Term Loan:                 The Company Bridge Loan and the Company Term
                                   Loan, as applicable, shall bear interest at
                                   the rate of three-month LIBOR, reset
                                   monthly, plus initially 4.75% PER ANNUM (the
                                   "INTEREST RATE") and which spread over LIBOR
                                   shall automatically increase by 0.50% for
                                   each period of 90 days (or portion thereof)
                                   that the Company Bridge Loan or the Company
                                   Term Loan, as the case may be, is
                                   outstanding; PROVIDED, HOWEVER, that the
                                   interest rate shall not exceed 16.00% PER
                                   ANNUM at any time.  At any time on or after
                                   the Conversion Date, the Company Term Loan
                                   shall, at the election of the Lender, bear
                                   interest at a fixed rate PER ANNUM equal to
                                   the Company Fixed Rate then in effect.  The
                                   "COMPANY FIXED RATE", as of any date of
                                   determination, shall be a rate of interest
                                   PER ANNUM equal to the then effective yield
                                   on U.S. Treasury securities having ten year
                                   maturities plus 7.00%.

Generally:                         Interest on the Company Bridge Loan and the
                                   Term Loans shall be payable on a quarterly
                                   basis.  Interest on the Company Bridge Loan
                                   and the Term Loans will be paid in cash if
                                   the interest rate is less than or equal to
                                   14.00% per annum with any interest in excess
                                   of 14.00% and less than or equal to 16.00%
                                   payable in additional loans having terms and
                                   provisions identical to the Company Bridge
                                   Loan or the applica-


<PAGE>

                                         -5-


                                   ble Term Loan, as the case may be.

RANKING:                           The obligations of Holdings under the
                                   Holdings Bridge Loan and Holdings Term Loan
                                   will be a senior unsecured obligation and
                                   will rank PARI PASSU as to payment with all
                                   other unsubordinated indebtedness of
                                   Holdings and senior to any subordinated
                                   indebtedness of Holdings.  

                                   The obligations of the Company under the
                                   Company Bridge Loan and the Company Term
                                   Loan will be senior subordinated obligations
                                   of the Company and will rank:  (i) PARI
                                   PASSU with all other senior subordinated
                                   indebtedness of the Company, (ii) senior to
                                   any subordinated indebtedness of the Company
                                   and (iii) subordinated in right of payment
                                   to (a) obligations of the Company under any
                                   unsubordinated indebtedness for borrowed
                                   money and any refinancing therof; and (b)
                                   any interest rate protection agreements or
                                   similar obligations relating to such
                                   indebtedness.

OPTIONAL PREPAYMENT:               The Borrower may prepay the Bridge Loans, in
                                   whole or in part, at any time at 100% of the
                                   accreted value thereof, in the case of the
                                   Holdings Bridge Loan, and at 100% of the
                                   principal amount thereof plus accrued
                                   interest thereon, in the case of the Company
                                   Bridge Loan, plus in each case customary
                                   breakage costs.  The Term Loans shall be
                                   subject to prepayment restrictions and
                                   premiums typical for term loans of this type
                                   and any high yield debt securities issued 


<PAGE>

                                         -6-


                                   in exchange for the Term Loans shall have
                                   prepayment restrictions and premiums typical
                                   for similar debt securities.

MANDATORY PREPAYMENT:              Net proceeds of sales of debt securities or
                                   equity securities in a public offering or
                                   private placement by the Borrower shall be
                                   used to prepay the Bridge Loans (plus
                                   accrued interest in the case of the Company
                                   Bridge Loan) and any other amount payable
                                   thereunder to the full extent of net
                                   proceeds so received. The Lender shall have
                                   sole discretion in determining which Bridge
                                   Loans (and the amounts thereof) will be
                                   repaid with such proceeds or otherwise.  The
                                   Borrower will be required to make an offer
                                   to repay the Bridge Loans or the Term Loans,
                                   as the case may be, upon the occurrence of a
                                   Change of Control (to be defined).

VOTING:                            Amendments and waivers of the Bridge Loan
                                   Facility will require the approval of
                                   Lenders holding more than 50% of the
                                   aggregate amount of loans and commitments
                                   under the Bridge Loan Facility; provided,
                                   that, the consent of each Lender affected
                                   shall be required for (i) reductions of
                                   principal, interests or fees or increases of
                                   commitments, or (ii) extension of the
                                   maturity of any loans.   

PARTICIPATION/ASSIGNMENT:          Assignments of loans and commitments to
                                   other Lenders or their affiliates may be
                                   made without restriction and with no minimum
                                   amounts.  Assignments of loans 


<PAGE>

                                         -7-


                                   and commitments to other financial
                                   institutions are subject to the consent of
                                   the Borrower and the Agent (not to be
                                   unreasonably withheld) and must be in
                                   minimum amounts of $5 million. The Agent
                                   will receive a processing fee of $3,500 per
                                   each assignment payable by the assignor
                                   and/or the assignee.  Participations will be
                                   unrestricted; voting rights of participants
                                   will be limited to matters requiring the
                                   consent of each Lender affected (as set
                                   forth in "Voting" above).

CONDITIONS TO CONVERSION
  OF THE BRIDGE LOAN:              One year after the Funding Date, unless
                                   (A) Holdings, the Company or any significant
                                   subsidiary thereof is subject to a
                                   bankruptcy or other insolvency proceeding,
                                   (B) there exists a matured default with
                                   respect to the Bridge Loans or (C) there
                                   exists a default in the payment when due at
                                   final maturity of any indebtedness
                                   (excluding the indebtedness under the Bridge
                                   Loans) of Holdings, the Company or any of
                                   its subsidiaries, or the maturity of such
                                   indebtedness shall have been accelerated,
                                   the Bridge Loans shall automatically be
                                   converted into the Term Loans; PROVIDED,
                                   HOWEVER, that if an event described in
                                   clause (C) is continuing at the scheduled
                                   Conversion Date but the applicable grace
                                   period, if any, set forth in the events of
                                   default provision of the Bridge Loans has
                                   not expired, the Conversion Date shall be
                                   deferred until the earlier to occur of
                                   (i) the cure of such event or (ii) the
                                   expiration of any applicable grace period.


<PAGE>

                                         -8-


DEBT SECURITY EXCHANGE:            The Lender may at any time after the
                                   Conversion Date require that the Borrower
                                   exchange all or a portion of any Term Loan
                                   for an equal principal amount of long-term
                                   notes which shall bear interest at the
                                   Holdings Fixed Rate or the Company Fixed
                                   Rate, as the case may be, determined at such
                                   time, and shall have similar terms and
                                   conditions to high yield debt securities
                                   issued for cash in the then prevailing
                                   market and acceptable to the Lender and
                                   shall in addition provide customary
                                   registration rights, including, without
                                   limitation, a registered exchange offer.

COVENANTS:                         The Financing Documentation will contain
                                   customary affirmative and negative
                                   covenants, including, without limitation,
                                   restrictions on the ability of Holdings, the
                                   Borrower and its subsidiaries to incur
                                   additional indebtedness, pay certain
                                   dividends and make certain other restricted
                                   payments and investments, impose
                                   restrictions on the ability of the
                                   Borrower's subsidiaries to pay dividends or
                                   make certain payments to the Borrower,
                                   create liens, enter into transactions with
                                   affiliates, enter into transactions
                                   resulting in a change of control, merge,
                                   consolidate or transfer substantially all of
                                   their respective assets, and maintain
                                   certain financial ratios and meet other
                                   financial tests, in each case satisfactory
                                   to the Lender.  Further, during the term of
                                   the Bridge Loans, the covenants will be more
                                   restrictive than the covenants applicable to
                                   the Term Loans.


<PAGE>

                                         -9-


REPRESENTATIONS AND
  WARRANTIES:                      Customary for transactions of this type, in
                                   each case satisfactory to the Lender.

CONDITIONS PRECEDENT:              Customary for transactions of this type, in
                                   each case satisfactory to the Lender.

EVENTS OF DEFAULT:                 Customary for transactions of this type,
                                   including, without limitation, payment
                                   defaults, covenant defaults, bankruptcy and
                                   insolvency, judgments, cross acceleration of
                                   and failure to pay at final maturity other
                                   indebtedness, subject to, in certain cases,
                                   notice and grace provisions, in each case
                                   satisfactory to the Lender.

GOVERNING LAW AND FORUM:           The State of New York.

INDEMNIFICATION AND
  EXPENSE REIMBURSEMENT:           Customary for transactions of this type, in
                                   each case satisfactory to the Lender.


<PAGE>

                                                                         ANNEX A


Set forth below is an outline of the actions contemplated to occur in connection
with the consummation of the tender offer pursuant to the Agreement and Plan of
Merger ("Merger Agreement") among Coal Ventures, Inc., Ziegler Acquisition Corp.
and Ziegler Coal Holding Company ("Ziegler") and the related financing.  On a
date before the scheduled date for acceptance and payment (the "Closing Date")
for the number of shares representing at least 90% of the outstanding shares of
Ziegler, all documentation relating to the Credit Facility shall have been
finalized and executed, to be held in escrow.  The security documents necessary
to pledge, or grant a security interest in, the assets of Ziegler will be
executed by the persons to become the officers of the post-acquisition Ziegler
entity.  Following the acceptance and payment for the tendered shares, (i) the
resignation of the Ziegler directors will immediately become effective and the
Borrower will elect a new Board and (ii) the Merger will be effected as soon as
practicable thereafter.  Promptly upon the Effective Time the security documents
will be released from escrow and will be filed or recorded as promptly as
practicable thereafter.  Counsel for UBS AG, Stamford Branch ("UBS"), and the
Lenders shall be satisfied that, after the tender offer is consummated, and upon
the filing of the necessary security documents, the Lenders will have a
perfected first priority security interest.  Capitalized terms not define herein
have the meanings ascribed to them in the Commitment Letter dated August 3, 1998
between Warburg Dillon Read LLC, UBS, and Coal Ventures, Inc. ("Borrower").


Pre-Closing Date:   -  Financing documents (including all security documents)
                    finalized.  Executed and placed in escrow.

                    -  Borrower receives tender of shares representing at least
                    90% of outstanding Ziegler shares.

Closing Date:       -  Tender of shares accepted by Borrower.

                    -  Credit Agreement becomes effective, Lenders transmit
                    funds to the depository.

                    -  Tendered Shares released to Borrower; Resignation of
                    directors of Ziegler pursuant to terms of Merger Agreement
                    becomes effective.; New Ziegler directors approve merger;
                    merger certificate filed in Delaware

                    -  Security documents become effective.

                    -  Filing of security documents commences.



<PAGE>


                                                                  Exhibit (C)(1)


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


                          AGREEMENT AND PLAN OF MERGER

                                  by and among

                              AEI RESOURCES, INC.,

                         ZEIGLER ACQUISITION CORPORATION
                                       and

                          ZEIGLER COAL HOLDING COMPANY

                                 August 3, 1998

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


<PAGE>


<TABLE>
<CAPTION>

                                TABLE OF CONTENTS

                                                                                                               Page
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<S>                        <C>                                                                                    <C> 
ARTICLE I                  THE OFFER..............................................................................2
         SECTION 1.01      The Offer..............................................................................2
         SECTION 1.02      Company Actions........................................................................3
         SECTION 1.03      Directors..............................................................................4
         SECTION 1.04      Stock Options..........................................................................5

ARTICLE II                 THE MERGER.............................................................................5
         SECTION 2.01      The Merger.............................................................................5
         SECTION 2.02      Closing Effective Time.................................................................5
         SECTION 2.03      Effects of the Merger..................................................................6
         SECTION 2.04      Additional Actions.....................................................................6
         SECTION 2.05      Conversion of Common Shares............................................................6
         SECTION 2.06      Conversion of Purchaser Common Stock...................................................7
         SECTION 2.07      Company Option Plans...................................................................7
         SECTION 2.08      Merger Without Meeting of Stockholders.................................................7

ARTICLE III                DISSENTING SHARES; PAYMENT FOR SHARES..................................................7
         SECTION 3.01      Dissenting Shares......................................................................7
         SECTION 3.02      Payment for Common Shares..............................................................8

ARTICLE IV                 REPRESENTATIONS AND WARRANTIES OF THE COMPANY..........................................9
         SECTION 4.01      Organization and Qualification; Subsidiaries...........................................9
         SECTION 4.02      Charter and By-Laws...................................................................10
         SECTION 4.03      Capitalization........................................................................10
         SECTION 4.04      Authority Relative to this ...........................................................11
         SECTION 4.05      No Conflict; Required Filings and Consents............................................11
         SECTION 4.06      SEC Reports and Financial Statements..................................................12
         SECTION 4.07      Information...........................................................................13
         SECTION 4.08      Absence of Certain Developments.......................................................13
         SECTION 4.09      Real Property.........................................................................15
         SECTION 4.10      Personal Property.....................................................................17
         SECTION 4.11      Tax Matters...........................................................................17
         SECTION 4.12      Contracts and Commitments.............................................................18
         SECTION 4.13      Intellectual Property.................................................................19
         SECTION 4.14      Licenses and Permits..................................................................19
         SECTION 4.15      Litigation............................................................................20
         SECTION 4.16      Governmental Consents, etc............................................................20
         SECTION 4.17      Employee Benefit Plans................................................................20
         SECTION 4.18      Insurance.............................................................................22
         SECTION 4.19      Compliance with Laws..................................................................22
         SECTION 4.20      Environmental, Mining and Safety Matters..............................................23

</TABLE>

<PAGE>
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                                TABLE OF CONTENTS

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<S>                        <C>                                                                                    <C>
         SECTION 4.21      Affiliated Transactions...............................................................24
         SECTION 4.22      Brokers...............................................................................24
         SECTION 4.23      Labor Relations.......................................................................24
         SECTION 4.24      Permit Blocking.......................................................................25
         SECTION 4.25      Section 6 of the Joint Development Agreement..........................................25
         SECTION 4.26      Takeover Provisions Inapplicable......................................................25

ARTICLE V                  REPRESENTATIONS AND WARRANTIES OF PARENT AND THE PURCHASER............................25
                           SECTION 5.01     Organization and Qualification.......................................26
                           SECTION 5.02     Authority Relative to this Agreement.................................26
                           SECTION 5.03     No Conflict; Required Filings and Consents...........................26
                           SECTION 5.04     Information..........................................................27
                           SECTION 5.05     Financing............................................................27
                           SECTION 5.06     Parent and Purchaser Not an Interested Stockholder...................27
                           SECTION 5.07     No Knowledge of Misrepresentations or Omissions......................27
                           SECTION 5.08     Solvency.............................................................27
                           SECTION 5.09     Disclaimer Regarding Estimates and Projections.......................28

ARTICLE VI                 COVENANTS.............................................................................28
         SECTION 6.01      Conduct of Business of the Company....................................................28
         SECTION 6.02      Access to Information.................................................................30
         SECTION 6.03      Reasonable Efforts Notice of Certain Developments.....................................31
         SECTION 6.04      Consents..............................................................................31
         SECTION 6.05      Public Announcements..................................................................33
         SECTION 6.06      Employee Benefit Arrangements.........................................................33
         SECTION 6.07      Indemnification.......................................................................34
         SECTION 6.08      Notification of Certain Matters.......................................................34
         SECTION 6.09      No Solicitation; Termination Right....................................................35

ARTICLE VII                CONDITIONS TO CONSUMMATION OF THE MERGER..............................................37
         SECTION 7.01      Conditions............................................................................37

ARTICLE VIII               TERMINATION; AMENDMENTS; WAIVER.......................................................37
         SECTION 8.01      Termination...........................................................................37
         SECTION 8.02      Effect of Termination; Fees and Expenses..............................................38
         SECTION 8.03      Amendment.............................................................................39
         SECTION 8.04      Extension; Waiver.....................................................................39

ARTICLE IX                 MISCELLANEOUS.........................................................................39
</TABLE>


<PAGE>
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<CAPTION>

                                TABLE OF CONTENTS

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<S>                        <C>                                                                                    <C>
         SECTION 9.01      Non-Survival of Representations and Warranties........................................39
         SECTION 9.02      Entire Agreement; Assignment..........................................................39
         SECTION 9.03      Validity..............................................................................40
         SECTION 9.04      Notices...............................................................................40
         SECTION 9.05      Governing Law.........................................................................41
         SECTION 9.06      Descriptive Headings..................................................................41
         SECTION 9.07      Counterpart...........................................................................41
         SECTION 9.08      Parties in Interest...................................................................41
         SECTION 9.09      Specific Performance..................................................................41

ARTICLE X
                           DEFINITIONS...........................................................................42
         SECTION 10.01     Certain Definitions...................................................................42
</TABLE>


<PAGE>





                          AGREEMENT AND PLAN OF MERGER
                          ----------------------------

         AGREEMENT AND PLAN OF MERGER (this "Agreement") dated as of August 3,
1998 by and among AEI Resources, Inc., a Delaware corporation ("Parent"),
Zeigler Acquisition Corporation, a Delaware corporation and a wholly-owned
subsidiary of Parent (the "Purchaser"), and Zeigler Coal Holding Company, a
Delaware corporation (the "Company").

         WHEREAS, the respective Boards of Directors of Parent, the Purchaser
and the Company have approved the acquisition of the Company by Parent on the
terms and subject to the conditions set forth in this Agreement; and

         WHEREAS, the parties hereto desire that the Purchaser commence a tender
offer (the "Offer") to purchase all of the shares of Common Stock, par value
$.01 per share, of the Company (the "Common Shares") in accordance with the
terms of this Agreement; and

         WHEREAS, the Board of Directors of the Company (the "Board") has
approved the terms of the Offer, which will provide that, among other things,
the price to be paid thereunder for each outstanding Common Share will be not
less than $21.25 net to the seller of each such share (such price, as it may
hereafter be increased, the "Offer Price"), and is recommending that the
Company's stockholders accept the Offer; and

         WHEREAS, the respective Boards of Directors of Parent, the Purchaser
and the Company have approved the merger of the Purchaser with and into the
Company, as set forth below (the "Merger"), in accordance with the General
Corporation Law of the State of Delaware (the "GCL") and upon the terms and
subject to the conditions set forth in this Agreement, whereby each issued and
outstanding Common Share not owned directly or indirectly by Parent or the
Company will be converted into the right to receive $21.25 per Common Share, in
cash (the "Merger Consideration"); and

         WHEREAS, Parent, the Purchaser and the Company desire to make certain
representations, warranties, covenants and agreements in connection with the
acquisition of the Company by Parent pursuant to the Offer and the Merger and
also to prescribe various conditions to the Offer and the Merger; and

         WHEREAS, certain capitalized terms used in this Agreement have the
meaning as set forth or referred to in Article X hereof.

         NOW, THEREFORE, in consideration of the foregoing and the respective
representations, warranties, covenants and agreements set forth herein, Parent,
the Purchaser and the Company agree as follows:


<PAGE>



                                    ARTICLE I

                                    THE OFFER

         SECTION 1.01 The Offer.

         (a) Provided that this Agreement shall not have been terminated in
accordance with its terms and none of the events set forth in Paragraphs (a)
through (f) of Annex I hereto shall have occurred or be existing, no later than
two (2) business days after the public announcement of the terms of this
Agreement, the Purchaser shall commence the Offer, in accordance with the
requirements of Regulations 14D and 14E promulgated under the Exchange Act, and
any applicable State securities laws, to purchase all of the issued and
outstanding Common Shares for the Offer Price net to the seller thereof in cash,
provided, however, that the Purchaser shall use its best efforts to commence the
Offer as soon as practicable after the public announcement of the terms of this
Agreement, but in no event later than two business days after such public
announcement. The Offer shall expire and terminate on the twentieth (20th)
business day from the commencement of the Offer (the "Expiration Date");
provided, however, that the Purchaser shall have the right to extend the
Expiration Date up to ten (10) additional business days in order to satisfy any
of the conditions set forth in Annex I hereto other than the Offer Financing
Condition, provided that the failure of such conditions to be satisfied is not
due to a breach of this Agreement by Parent or Purchaser. Provided that this
Agreement shall not have been terminated in accordance with its terms and none
of the events set forth in Paragraphs (a) through (f) of Annex I hereto shall
have occurred or be existing, no later than (2) two business days after the
public announcement of the terms of this Agreement, the Purchaser shall file
with the Securities and Exchange Commission (the "SEC") the Purchaser's Tender
Offer Statement on Schedule 14D-1 (together with any supplements or amendments
thereto, the "Offer Documents"), which shall contain (as an exhibit) the
Purchaser's offer to purchase the Common Shares (the "Offer to Purchase") which
shall be mailed to the holders of Common Shares with respect to the Offer, which
shall contain the conditions set forth in Annex I hereto and no others; it being
understood that the Offer shall be on the terms and subject to the conditions
that are agreed to by the parties hereto and no others and that the Purchaser
shall use its best efforts to file the Tender Offer Statement on Schedule 14D-1
as soon as practicable, but in no event later than two business days after such
public announcement. The obligation of Purchaser to accept for payment or pay
for any Common Shares tendered pursuant to the Offer will be subject only to the
satisfaction of the conditions set forth in Annex I hereto. Without the prior
written consent of the Company, the Purchaser shall not decrease the price per
Common Share or change the form of consideration payable in the Offer, decrease
the number of Common Shares sought to be purchased in the Offer, change the
conditions set forth in Annex I, waive the Minimum Condition (as defined in
Annex I), impose additional conditions to the Offer or amend any other term of
the Offer in any manner adverse to the holders of Common Shares; provided that
the Purchaser expressly reserves the right to waive any condition to the Offer
(other than the Minimum Condition) without the consent of the Company. Subject
to the terms of the Offer and this Agreement and the satisfaction of all the
conditions of the Offer set forth in Annex I hereto as of any expiration date,
Purchaser will accept for payment and pay for all Common Shares


<PAGE>


validly tendered and not withdrawn pursuant to the Offer as soon as practicable
after such Expiration Date (the time of such purchase being referred to herein
as the "Offer Purchase Closing"). Purchaser shall make reasonable provision for
the payment of Offer proceeds to be made by wire transfer of immediately
available funds to any person tendering Common Shares representing more than 1%
of the Company's outstanding Common Shares. Subject to Section 8.01, if any of
the conditions set forth in Annex I hereto are not satisfied or, to the extent
permitted by this Agreement, waived by the Purchaser as of the Expiration Date
(or any subsequently scheduled expiration date), Purchaser will extend the Offer
from time to time, in each case, for the shortest time period that it reasonably
believes is necessary for the consummation of the Offer. Each of the parties
hereto shall use its reasonable best efforts to cause all conditions precedent
set forth in Annex I to be fulfilled and avoid the occurrence of any event or to
cure any event which may prevent such conditions precedent set forth in Annex I
from being fulfilled.

         (b) The Offer Documents will comply in all material respects with the
provisions of applicable federal securities laws and, on the date filed with the
SEC and on the date first published, sent or given to the Company's
stockholders, shall not contain any untrue statement of a material fact or omit
to state any material fact required to be stated therein or necessary in order
to make the statements made therein, in light of the circumstances under which
they were made, not misleading, except that no representation is made by Parent
or the Purchaser with respect to information supplied by the Company in writing
for inclusion in the Offer Documents. Each of Parent and the Purchaser, on the
one hand, and the Company, on the other hand, agrees promptly to correct any
information provided by it for use in the Offer Documents if and to the extent
that it shall have become false or misleading in any material respect and the
Purchaser further agrees to take all steps necessary to cause the Offer
Documents as so corrected to be filed with the SEC and to be disseminated to
stockholders of the Company, in each case, as and to the extent required by
applicable federal securities laws.

         SECTION 1.02 Company Actions.

         (a) The Company shall promptly (and in any event within two (2)
business days after the public announcement of the terms of this Agreement) file
with the SEC and mail to the holders of Common Shares the Company's
Solicitation/Recommendation Statement on Schedule 14D-9 with respect to the
Offer (together with any amendments or supplements thereto, the "Schedule
14D-9"). The Schedule 14D-9 will set forth, and the Company hereby represents,
that the Board, at a meeting duly called and held, has (i) determined that the
Offer and the Merger are fair to and in the best interests of the Company and
its stockholders, (ii) approved the Offer and the Merger in accordance with
Section 203 of the GCL, and (iii) resolved to recommend and continues to
recommend acceptance of the Offer and approval and adoption of the Merger and
this Agreement by the Company's stockholders (if such approval is required by
applicable law) (such recommendation to the Company's stockholders being
referred to as the "Board Recommendation"); provided, however, that such
recommendation and approval may be 

<PAGE>

withdrawn, modified or amended as provided in Section 6.09. The Company further
represents that Credit Suisse First Boston Corporation ("CSFB") has delivered to
the Board its written opinion to the effect that, as of the date of this
Agreement, the cash consideration to be received for the Common Shares pursuant
to the Offer and the Merger is fair to the holders of the Common Shares (other
than Parent and its affiliates) from a financial point of view.



         (b) Each of the Company, on the one hand, and Parent and the Purchaser,
on the other hand, agree promptly to correct any information provided by either
of them for use in the Schedule 14D-9 if and to the extent that it shall have
become false or misleading, and the Company further agrees to take all steps
necessary to cause the Schedule 14D-9 as so corrected to be filed with the SEC
and to be disseminated to the holders of the Common Shares, in each case, as and
to the extent required by applicable federal securities law.

         (c) In connection with the Offer, the Company will use reasonable best
efforts to cause to be furnished to Purchaser mailing labels, security position
listings and any available listing or computer file containing the names and
addresses of the record holders of the Shares as of a recent date and shall
furnish Purchaser with such additional information and assistance (including,
without limitation, updated lists of stockholders, mailing labels and lists of
securities positions) as Purchaser or its agents may reasonably request in
communicating the Offer to the record and beneficial holders of Shares. Subject
to the requirements of applicable law, and except for such steps as are
necessary to disseminate the Offer Documents and any other documents necessary
to consummate the Merger, Purchaser and its affiliates and associates shall hold
in confidence the information contained in any such labels, listings and files,
will use such information only in connection with the Offer and the Merger, and,
if this Agreement shall be terminated, will deliver to the Company all copies of
such information then in their possession.

         SECTION 1.03 Directors.

         (a) Subject to compliance with applicable law, promptly upon the
payment by the Purchaser for Common Shares pursuant to the Offer, and from time
to time thereafter, Parent shall be entitled to designate at least such number
of directors, rounded up to the next whole number, on the Board as is equal to
the product of the total number of directors on the Board (determined after
giving effect to the directors elected pursuant to this sentence) multiplied by
the percentage that the aggregate number of Common Shares beneficially owned by
Parent or its affiliates bears to the total number of Common Shares then
outstanding, and the Company shall, upon request of Parent, promptly take all
actions necessary to cause Parent's designees to be so elected, including, if
necessary, seeking the resignations of one or more existing directors.

         (b) The Company's obligations to appoint Parent's designees to the
Board shall be subject to Section 14(f) of the Exchange Act and Rule 14f-1
thereunder. The Company shall promptly take all actions required pursuant to
such Section and Rule in order to fulfill its obligations under this Section
1.03 and shall include in the Schedule 14D-9 such information with respect to
the Company and its officers and directors as is required under such Section and
Rule in order to fulfill its obligations under this Section 1.03. Parent will
supply any information with respect to itself and its officers, directors and
affiliates required by such Section and Rule to 

<PAGE>

the Company.

         (c) Following the election or appointment of Parent's designees
pursuant to this Section 1.03 and prior to the Effective Time, any amendment or
termination of this Agreement by the Company, the Company shall not extend the
time for the performance of any of the obligations or other acts of Parent or
the Purchaser or waive any of the Company's rights hereunder, or take any other
action if such amendment, termination, extension, waiver or action would have an
adverse effect on the minority stockholders of the Company.



         SECTION 1.04 Stock Options. Promptly following the commencement of the
Offers the Company shall offer to cancel any or all of the outstanding options
to purchase Common Shares and each outstanding stock appreciation unit (each
such option to purchase one share and each such unit representing one share
being referred to as an "Option") granted under the Company's Incentive Stock
Option Plan and the Company's Stock Appreciation Rights Plan (collectively the
"Option Plan") for cash consideration as set forth herein. Each holder of an
Option which is vested (after giving consideration to any acceleration of
vesting provided in the Option Plan or the Company's Special Bonus and Severance
Plan (the "SBS Plan")) shall be offered the right to have 100% of his or her
Options canceled by the Company in consideration of a payment by the Company to
such holder for each Option in an amount equal to the excess of the Offer Price
over the applicable exercise price of such Option. Cancellation of the Options
and payment of the consideration therefor shall be conditioned upon the purchase
of Common Shares by the Purchaser pursuant to the Offer. If such condition is
met, the cancellation of Options and payment of the consideration therefor in
accordance with this section shall be made as promptly as possible following the
Offer Purchase Closing.

                                   ARTICLE II

                                   THE MERGER

         SECTION 2.01 The Merger. Upon the terms and subject to the satisfaction
or waiver of the conditions of this Agreement, and in accordance with the
applicable provisions of this Agreement and the GCL, at the Effective Time (as
defined in Section 2.02) the Purchaser shall be merged with and into the
Company. Following the Merger, the separate corporate existence of the Purchaser
shall cease and the Company shall continue as the surviving corporation and
shall succeed to and assume all the rights and obligations of Purchaser in
accordance with the GCL. In its capacity as the surviving corporation of the
Merger, the Company is sometimes referred to herein as the "Surviving
Corporation."

         SECTION 2.02 Closing Effective Time. The closing of the Merger (the
"Closing") will take place as promptly as practicable following the satisfaction
or waiver of the conditions set forth in Section 7.01 of this Agreement (the
"Closing Date"), at the offices of Brown, Todd & Heyburn PLLC, Lexington, KY.
Immediately following the Closing, the parties hereto shall cause the Merger to
become effective by filing a Certificate of Merger or, if 

<PAGE>

permitted, a Certificate of Ownership and Merger, with the Secretary of State of
the State of Delaware, in accordance with the relevant provisions of the GCL
(the time of such filing being the "Effective Time") and shall make all other
filings or recordings required under the GCL.




         SECTION 2.03 Effects of the Merger.

         (a) The Merger shall have the effects set forth in the GCL.

         (b) The Certificate of Incorporation of the Company, as in effect
immediately prior to the Effective Time, shall be the Certificate of
Incorporation of the Surviving Corporation, until thereafter amended in
accordance with the provisions thereof and hereof and applicable law.

         (c) Subject to the provisions of Section 6.07 of this Agreement, the
By-Laws of the Purchaser in effect at the Effective Time shall be the By-Laws of
the Surviving Corporation until amended in accordance with the provisions
thereof and applicable law.

         (d) Subject to applicable law, the directors of the Purchaser
immediately prior to the Effective Time shall be the initial directors of the
Surviving Corporation and shall hold office until their respective successors
are duly elected and qualified, or their earlier death, resignation or removal.

         (e) The officers of the Company immediately prior to the Effective 
Time shall be the initial officers of the Surviving Corporation and shall 
hold office until their respective successors are duly elected and qualified, 
or their earlier death, resignation or removal.

         SECTION 2.04 Additional Actions. If, at any time after the Effective
Time, the Surviving Corporation shall consider or be advised that any further
deeds, assignments or assurances in law or any other acts are necessary or
desirable to (a) vest, perfect or confirm, of record or otherwise, in the
Surviving Corporation its rights, title or interest in, to or under any of the
rights, properties or assets of the Company or its Subsidiaries, or (b)
otherwise carry out the provisions of this Agreement, the Company and its
officers and directors shall be deemed to have granted the Surviving Corporation
an irrevocable power of attorney to execute and deliver all such deeds,
assignments or assurances in law and to take all acts necessary, proper or
desirable to vest, perfect or confirm title to and possession of such rights,
properties or assets in the Surviving Corporation and otherwise to carry out the
provisions of this Agreement, and the officers and directors of the Surviving
Corporation are authorized in the name of the Company or otherwise to take any
and all such action.

         SECTION 2.05 Conversion of Common Shares. At the Effective Time, by
virtue of the Merger and without any action on the part of the holders thereof,
(I) each Common Share issued and outstanding immediately prior to the Effective
Time (other than Dissenting Shares (as defined in Section 3.01) and Shares held
by the Company, Parent, Purchaser and their respective Subsidiaries) shall be
converted into the right to receive the Merger Consideration in cash, payable to
the holder thereof, without interest thereon, upon surrender of the certificate

<PAGE>


formerly representing such Common Share, and (ii) each Common Share owned by the
Company or one of its Subsidiaries or by Parent or Purchaser or one of its
Subsidiaries shall be canceled without payment and without surrender of the
certificate formerly representing such Common Shares.


         SECTION 2.06 Conversion of Purchaser Common Stock. At the Effective
Time, each share of common stock, par value $.01 per share, of the Purchaser
issued and outstanding immediately prior to the Effective Time shall, by virtue
of the Merger and without any action on the part of the holder thereof, be
converted into and become one validly issued, fully paid and non-assessable
share of common stock, par value $.01 per share, of the Surviving Corporation.

         SECTION 2.07 Company Option Plans. At the Effective Time, by virtue of
the Merger and without any action on the parts of the holders thereof, each then
outstanding Option shall be converted into the right to receive an amount
determined by multiplying (i) the excess, if any, of the Offer Price over the
applicable exercise price of such Option by (ii) the number of Common Shares
such holder could have purchased if such holder had exercised such Option
immediately prior to the Effective Time, but only to the extent then vested and
exercisable, provided that the determination of the exercisability of Options
shall take into account the acceleration of vesting provided for in the Option
Plan or the SBS Plan. The Surviving Corporation will pay any amount required to
be paid pursuant to this Section 2.07 upon exercise or delivery of any then
outstanding Options to the Surviving Corporation by or on behalf of the holder
thereof.

         SECTION 2.08 Merger Without Meeting of Stockholders. The Purchaser and
Parent agree to take all necessary and appropriate action to cause the Merger to
become effective as soon as practicable after the acceptance for payment of and
payment for Common Shares by the Purchaser pursuant to the Offer without a
meeting of stockholders of the Company, in accordance with Section 253 of the
GCL.

                                   ARTICLE III

                      DISSENTING SHARES; PAYMENT FOR SHARES

         SECTION 3.01 Dissenting Shares. Notwithstanding anything in this
Agreement to the contrary, Common Shares outstanding immediately prior to the
Effective Time and held by a holder who has demanded appraisal for such Shares
in accordance with Section 262 of the GCL, if such Section 262 provides for
appraisal rights for such shares in the Merger ("Dissenting Shares"), shall not
be converted into the right to receive the Merger Consideration as provided in
Section 2.05, unless and until such holder fails to perfect or withdraws or
otherwise loses his right to appraisal and payment under the GCL. If, after the
Effective Time, any such holder fails to perfect or withdraws or loses his right
to appraisal, such Dissenting

<PAGE>

Shares shall thereupon be treated as if they had been converted as of the
Effective Time into the right to receive the Merger Consideration, if any, to
which such holder is entitled, without interest or dividends thereon. The
Company shall give Parent prompt notice of any demands received by the Company
for appraisal of Common Shares and Parent shall have the right to participate in
all negotiations and proceedings with respect to such demands. Prior to the
Effective Time, the Company shall not, except with the prior written consent of
Parent, make any payment with respect to, or settle or offer to settle, any such
demands.



         SECTION 3.02 Payment for Common Shares.

         (a) From and after the Effective Time, The Bank of New York, or such
other bank or trust company as shall be mutually acceptable to Parent and the
Company, shall act as paying agent (the "Paying Agent") in effecting the payment
of the Merger Consideration in respect of certificates (the "Certificates")
that, prior to the Effective Time, represented Common Shares entitled to payment
of the Merger Consideration pursuant to Section 2.05. At the Effective Time,
Parent or the Purchaser shall deposit, or cause to be deposited, in trust with
the Paying Agent the aggregate Merger Consideration to which holders of Common
Shares shall be entitled at the Effective Time pursuant to Section 2.05.

         (b) Promptly after the Effective Time, the Paying Agent shall mail to
each record holder of Certificates that immediately prior to the Effective Time
represented Common Shares (other than Certificates representing Dissenting
Shares and Certificates representing Common Shares held by Parent, the
Purchaser, or the Company) a form of letter of transmittal which shall specify
that delivery shall be effected, and risk of loss and title to the Certificates
shall pass, only upon proper delivery of the Certificates to the Paying Agent
and instructions for use in surrendering such certificates and receiving the
Merger Consideration in respect thereof. Upon the surrender of each such
Certificate, the Paying Agent shall, in consideration for the shares represented
by such Certificates, pay the holder of such Certificate the Merger
Consideration multiplied by the number of Common Shares formerly represented by
such Certificate, in consideration therefor, and such Certificate shall
forthwith be canceled. Until so surrendered, each such Certificate (other than
Certificates representing Dissenting Shares and Certificates representing Common
Shares held by Parent, the Purchaser, or the Company) shall represent solely the
right to receive the aggregate Merger Consideration relating thereto. No
interest or dividends shall be paid or accrued on the Merger Consideration. If
the Merger Consideration (or any portion thereof) is to be delivered to any
person other than the person in whose name the Certificate formerly representing
Common Shares surrendered therefor is registered, it shall be a condition to
such right to receive such Merger Consideration that the Certificate so
surrendered shall be properly endorsed or otherwise be in proper form for
transfer and that the person surrendering such Common Shares shall pay to the
Paying Agent any transfer or other taxes required by reason of the payment of
the Merger Consideration to a person other than the registered holder of the
Certificate surrendered, or shall establish to the satisfaction of the Paying
Agent that such tax has been paid or is not applicable. Promptly after the
Effective Time, the Paying Agent shall mail to each record holder of
Certificates that immediately prior to the Effective Time represented Dissenting
Shares a notice of appraisal rights.

<PAGE>

         (c) Promptly following the date which is 180 days after the Effective
Time, the Paying Agent shall deliver to the Surviving Corporation all cash,
Certificates and other documents in its possession relating to the transactions
described in this Agreement, and the Paying Agent's duties shall terminate.
Thereafter, holders of Common Shares who have not theretofore complied with this
Section 3.02 shall look only to the Surviving Corporation for payment of the
Merger Consideration in respect thereof (subject to applicable abandoned
property, escheat and similar laws), in each case, without interest or dividends
thereon.

         (d) None of Parent, the Purchaser, the Surviving Corporation or the
Paying Agent shall be liable to any person in respect of any Common Shares (or
dividends or distributions with respect thereto) or cash deposited by Parent or
the Purchaser with the Paying Agent that is delivered to a public official
pursuant to any applicable abandoned property, escheat or similar law. If any
Certificates shall not have been surrendered prior to seven years after the
Effective Time (or immediately prior to such earlier date on which any cash
would otherwise escheat to or become the property of any Governmental Entity),
any such cash in respect of such Certificate shall, to the extent permitted by
applicable law become the property of Parent, free and clear of all claims or
interest of any person previously entitled thereto.

         (e) Parent, the Purchaser and the Paying Agent shall be entitled to
deduct and withhold from the consideration otherwise payable or issuable
pursuant to this Agreement to any holder of Common Shares such amounts as
Parent, the Purchaser or the Paying Agent are required to deduct and withhold
with respect to such payment or issuance under the Code, or any provision of
state, local or foreign tax law. To the extent that amounts are so withheld,
such withheld amounts shall be treated for all purposes of this Agreement as
having been paid to the holders of Common Shares in respect of which such
deduction and withholding was made.

         (f) All cash issued upon surrender of Certificates in accordance with
the terms hereof shall be deemed to have been issued in full satisfaction of all
rights pertaining to such Common Shares formerly represented thereby. After the
Effective Time, there shall be no transfers on the stock transfer books of the
Surviving Corporation of any Common Shares which were outstanding immediately
prior to the Effective Time. If, after the Effective Time, Certificates formerly
representing Common Shares are presented to the Surviving Corporation or the
Paying Agent, they shall be surrendered and canceled in return for the payment
of the aggregate Merger Consideration relating thereto, as provided in this
Article III, subject to applicable law in the case of Dissenting Shares.

                                   ARTICLE IV

                  REPRESENTATIONS AND WARRANTIES OF THE COMPANY

         The Company represents and warrants to Parent and the Purchaser that
except as set forth in the Disclosure Schedules (as hereinafter defined) as of
the date hereof (or such other later date as is specified):

         SECTION 4.01 Organization and Qualification; Subsidiaries. (a) The

<PAGE>


Company is a corporation duly organized, validly existing and in good standing
under the laws of the State of Delaware. Set forth on the Subsidiary Schedule is
a list of every corporation, limited liability company, partnership or other
business organization or entity of which the Company owns, either directly or
through its Subsidiaries, (a) more than 50% of (i) the total combined voting
power of all classes of voting securities of such entity, (ii) the total
combined equity interests therein, or (iii) the capital or profit interests
therein, in the case of a partnership; or (b) otherwise has the power to vote or
direct the voting of sufficient securities to elect a majority of the board of
directors or similar governing body of such entity (the "Subsidiaries"). Each of
the Subsidiaries listed on the Subsidiary Schedule is a corporation duly
organized, validly existing and in good standing under the laws of the
jurisdiction of its incorporation. The Company and each of the Subsidiaries has
the requisite corporate power to own, operate or lease its properties and to
carry on its business as it is now being conducted, and is duly qualified or
licensed to do business, and is in good standing, in each jurisdiction in which
the nature of its business or the properties owned, operated or leased by it
makes such qualification, licensing or good standing necessary, except where the
failure to have such power, or the failure to be so qualified, licensed or in
good standing, would not have a Material Adverse Effect on the Company. The term
"Material Adverse Effect on the Company," as used in this Agreement, means any
development, condition or circumstance having an effect on the assets, business,
operations, or financial condition of the Company or any of its Subsidiaries
that is materially adverse to the Company and its Subsidiaries taken as a whole
other than any development, condition or circumstance resulting from general
economic conditions or relating generally to the coal or electric power
industries.

         SECTION 4.02 Charter and By-Laws. The Company has heretofore made
available to Parent and the Purchaser a complete and correct copy of the charter
and the by-laws or comparable organizational documents, each as amended to the
date hereof, of the Company and each of the Subsidiaries.

         SECTION 4.03 Capitalization. The authorized capital stock of the
Company consists of 50,000,000 Common Shares and 1,000,000 shares of Preferred
Stock, no par value. As of the close of business on July 28, 1998, 28,222,671
Common Shares were issued and outstanding, and 244,000 Common Shares were in the
Company's treasury, and no shares of Preferred Stock were issued and
outstanding. The Company has no shares reserved for issuance, except that, as of
July 28, 1998, there were 1,666,760 Common Shares reserved for issuance pursuant
to outstanding Options under the Option Plan, all of which were granted prior to
March 31, 1998. The Options Schedule sets forth the name of each holder of an
outstanding Option under the Option Plan, and with respect to each Option held
by any such holder, the grant date, exercise price and number of Common Shares
for which such Option is exercisable. As of the date hereof, the Company has no
options to purchase Common Shares outstanding other than those granted and
outstanding under the Option Plan. Since December 31, 1997, the Company has not
issued any shares of capital stock except pursuant to the exercise of Options
outstanding as of such date. All of the outstanding Common Shares are, and all
Common Shares which may be issued pursuant to the exercise of outstanding
Options will be, when issued in accordance with the respective terms thereof,
duly authorized, validly issued, fully paid and nonassessable. There 


<PAGE>

are no bonds, debentures, notes or other indebtedness having general voting
rights (or convertible into securities having such rights) of the Company or any
of its Subsidiaries issued and outstanding. Except as set forth on the Options
Schedule and except as contemplated by this Agreement, or between the Company
and one or more of its direct or indirect wholly-owned subsidiaries, there are
no existing options, warrants, calls, subscriptions or other rights, agreements,
arrangements or commitments of any character, relating to the issued or unissued
capital stock of the Company or any of the Subsidiaries, obligating the Company
or any of the Subsidiaries to issue, transfer or sell or cause to be issued,
transferred or sold any shares of capital stock of, or other equity interest in
or voting security of, the Company or any of the Subsidiaries or securities
convertible into or exchangeable for such shares or equity interests or voting
securities and neither the Company nor any of the Subsidiaries is obligated to
grant or enter into any such option, warrant, call, subscription or other right,
agreement, arrangement or commitment. Except as contemplated by this Agreement
or between the Company and one or more of its direct or indirect wholly-owned
subsidiaries, there are no outstanding contractual obligations of the Company or
any of its Subsidiaries to repurchase, redeem or otherwise acquire any Common
Shares or the capital stock of the Company or any of the Subsidiaries. Each of
the outstanding shares of capital stock of each of the Company's Subsidiaries is
duly authorized, validly issued, fully paid and nonassessable, and such shares
of the Company's Subsidiaries as are owned by the Company or by a subsidiary of
the Company are owned in each case free and clear of any Lien (as hereinafter
defined). Other than as set forth on the Contracts Schedule, the Company has not
agreed to register any securities under the Securities Act or under any state
securities law or granted registration rights to any person or entity.

         SECTION 4.04 Authority Relative to this Agreement. The Company has all
necessary corporate power and authority to execute and deliver this Agreement
and to consummate the transactions contemplated hereby. The execution and
delivery of this Agreement by the Company and the consummation by the Company of
the transactions contemplated hereby have been duly and validly authorized and
approved by the Board and no other corporate proceedings on the part of the
Company or on the part of the stockholders of the Company are necessary to
authorize or approve this Agreement or to consummate the transactions
contemplated hereby except as required by Delaware law. This Agreement has been
duly and validly executed and delivered by the Company and, assuming the due and
valid authorization, execution and delivery of this Agreement by Parent and the
Purchaser, this Agreement constitutes a valid and binding obligation of the
Company enforceable against the Company in accordance with its terms, except
that such enforceability (I) may be limited by bankruptcy, insolvency,
moratorium or other similar laws affecting or relating to the enforcement of
creditors' rights generally and (ii) is subject to general principles of equity.

         SECTION 4.05 No Conflict; Required Filings and Consents.

         (a) None of the execution and delivery of this Agreement by the
Company, the consummation by the Company of the Merger, compliance by the
Company with any of the provisions hereof or consummation of the Merger or any
other transaction contemplated hereby will (i) conflict with or violate the
Certificate of Incorporation or By-Laws of the Company or 

<PAGE>

the comparable organizational documents of any Subsidiary, (ii) conflict with or
violate any statute, ordinance, rule, regulation, Order, judgment or decree
applicable to the Company or its Subsidiaries, or by which any of them or any of
their respective properties or assets may be bound, or (iii) result in a
violation or breach of or constitute a default (or an event which with notice or
lapse of time or both would become a default) under, or give to others any
rights of termination, amendment, acceleration or cancellation of, or result in
any loss of any material benefit, or the creation of any Lien on any of the
property or assets of the Company or any of its Subsidiaries (any of the
foregoing referred to in clause (ii) or this clause (iii) being a "Violation")
pursuant to, any note, bond, mortgage, indenture, contract, agreement, lease,
license, permit, franchise or other instrument or obligation to which the
Company or any of its Subsidiaries is a party or by which the Company or any of
its Subsidiaries or any of their respective properties may be bound or affected,
except, in the cases of clauses (ii) and (iii) for any such Violations which
would not individually or in the aggregate have a Material Adverse Effect on the
Company.

         (b) None of the execution and delivery of this Agreement by the
Company, the consummation by the Company of the Merger or any other transaction
contemplated hereby or compliance by the Company and its Subsidiaries with any
of the provisions hereof will require any consent, waiver, approval,
authorization or permit of, or registration or filing with or notification to
(any of the foregoing being a "Consent") any government or subdivision thereof,
domestic, foreign or supranational or any administrative, governmental or
regulatory authority, agency, commission, tribunal or body, domestic, foreign or
supranational (a "Governmental Entity") or any third party, except for (I)
compliance with any applicable requirements of the Securities Exchange Act of
1934, as amended (the "Exchange Act"), (ii) the filing of a certificate of
merger, or, if permitted, a certificate of ownership and merger, pursuant to the
GCL, (iii) compliance with the Hart-Scott-Rodino Antitrust Improvements Act of
1976, as amended (the "HSR Act") and any requirements of any foreign or
supranational Antitrust Laws (as hereinafter defined), (iv) other Consents
identified in the Consents Schedule (including notices and Consents relating to
or in connection with mining, reclamation and environmental Permits), and (v)
other Consents the failure of which to obtain or make would not individually or
in the aggregate have a Material Adverse Effect on the Company.

         SECTION 4.06 SEC Reports and Financial Statements.

         (a) The Company has filed with the SEC all forms, reports, schedules,
registration statements and definitive proxy statements required to be filed by
the Company with the SEC since January 1, 1995 (the "SEC Reports"). As of their
respective dates, the SEC Reports complied in all material respects with the
requirements of the Exchange Act or the Securities Act of 1933 and the rules and
regulations of the SEC promulgated thereunder applicable, as the case may be, to
such SEC Reports, and none of the SEC Reports contained any untrue statement of
a material fact or omitted to state a material fact required to be stated
therein or necessary to make the statements made therein, in light of the
circumstances under which they were made, not misleading.

         (b) The consolidated balance sheets as of December 31, 1997, 1996, 1995
and 

<PAGE>

the related consolidated statements of income, stockholders' equity and cash
flows for each of the three years in the period ended December 31, 1997
(including the related notes and schedules thereto) of the Company contained in
the Form 10-Ks for the years ended December 31, 1997, 1996 and 1995 included in
the SEC Reports and the consolidated balance sheet as of March 31, 1998 and the
related consolidated statements of income, stockholders' equity and cash flows
for the quarter ended March 31, 1998 contained in the Form 10-Q for the quarter
ended March 31, 1998 included in the SEC Reports present, and the consolidated
balance sheet as of June 30, 1998 and the related consolidated statements of
income, stockholders' equity and cash flows for the six months ended June 30,
1998 contained in the Form 10-Q for the quarter ended June 30, 1998 present,
fairly, in all material respects, the consolidated financial position and the
consolidated results of operations and cash flows of the Company and its
consolidated Subsidiaries as of the dates or for the periods presented therein
in conformity with United States generally accepted accounting principles
("GAAP") applied on a consistent basis during the periods involved except as
otherwise noted therein, including the related notes. The audited balance sheet
as of December 31, 1997 is herein referred to as the "December Balance Sheet,"
the unaudited balance sheet as of March 31, 1998 is herein referred to as the
"March Balance Sheet," and the unaudited balance sheet as of June 30, 1998 is
herein referred to as the "June Balance Sheet." The amounts accrued or reserved
for in the December Balance Sheet, the March Balance Sheet and the June Balance
Sheet with respect to future costs associated with workers' compensation
liabilities, Reclamation Obligations (as hereinafter defined) and Black Lung
liabilities (as hereinafter defined) have been accrued or reserved for in
accordance with GAAP, consistently applied. The amounts reflected in the
December Balance Sheet, the March Balance Sheet and the June Balance Sheet with
respect to coal and mineral reserves have been included or will be included in
such financial statements in accordance with GAAP, consistently applied. The
Company has accrued its and its Subsidiaries' and affiliates' obligations for
retiree medical benefits in accordance with Statement of Financial Account
Standards No. 106.

         (c) Since March 31, 1998, except as disclosed in the SEC Reports or the
Developments Schedule, there has not been any Material Adverse Effect on the
Company or any event, condition or development which the Company believes is
reasonably likely to result in a Material Adverse Effect on the Company.

         (d) The Company and its Subsidiaries are not subject to any material
liabilities or obligations (absolute, accrued, contingent or otherwise) other
than (i) arising under contracts or circumstances reflected on or otherwise
referred to in the Disclosure Schedules (subject to Section 4.12(c)), (ii)
reflected in, reserved against or otherwise disclosed in the December Balance
Sheet, March Balance Sheet or June Balance Sheet, or (iii) incurred in the
ordinary course of business consistent with past practice.

         SECTION 4.07 Information. None of the information supplied by the
Company in writing specifically for inclusion or incorporation by reference in
(i) the Offer Documents, (ii) the Schedule 14D-9, or, (iii) any other document
to be filed with the SEC or any 

<PAGE>

other Governmental Entity in connection with the transactions contemplated by
this Agreement (the "Other Filings") will, at the respective times filed with
the SEC or other Government Entity, contain any untrue statement of a material
fact or omit to state any material fact required to be stated therein or
necessary in order to make the statements made therein, in light of the
circumstances under which they were made, not misleading. The Schedule 14D-9
will comply as to form in all material respects with the provisions of the
Exchange Act and the rules and regulations thereunder.

         SECTION 4.08 Absence of Certain Developments. Except as set forth on
the Developments Schedule and except as expressly contemplated by this
Agreement, since March 31, 1998, neither the Company nor any of its Subsidiaries
has engaged in any material transaction outside the ordinary course of business
consistent with past practice or:

         (a) Incurred any indebtedness for borrowed money, except borrowings
from banks (or other financial institutions) necessary to meet ordinary course
working capital requirements and to finance capital expenditures in the ordinary
course of business consistent with past practice;


         (b) Mortgaged, pledged or subjected to any Lien, any asset or related
group of assets having a net book value in excess of $500,000;

         (c) Sold, leased, assigned or transferred any tangible asset or related
group of assets having a net book value in excess of $500,000 except for the
sale of inventory and obsolete or used machinery and equipment in the ordinary
course of business consistent with past practice;

         (d) Sold, leased, assigned or transferred any interest in real estate
having a net book value in excess of $500,000;

         (e) Sold, licensed, assigned or transferred any patents, trademarks,
trade names, copyrights, trade secrets or other intangible assets having a fair
market value in excess of $500,000 individually or in the aggregate;

         (f) Waived or relinquished any right or claim or related group of
rights or claims except any such item which the Company believes has a fair
value of less than $500,000 individually or in the aggregate;

         (g) (x) Issued or sold any of its Common Shares or other equity
securities or any warrants, options or other rights to acquire its Common Shares
or other securities of the Company, except for the issuance of Common Shares
upon exercise of Options outstanding as of March 31, 1998 or (y) purchased or
redeemed or agreed to purchase or redeem any Common Shares or other equity
securities;

         (h) Made or entered into binding commitment for any capital
expenditures or related group of capital expenditures in excess of $1,000,000
other than such expenditures 

<PAGE>

contemplated in the financial statements and plans provided to the Purchaser by
the Company;

         (i) Modified or amended in any material manner or terminated or entered
into any Material Contract (as hereinafter defined);

         (j) Granted any increase in the base compensation of, or made any other
material change in the employments terms for, any of its directors, officers,
and employees other than normal periodic increases or changes reflecting or
based upon changed responsibilities or duties made in the ordinary course of
business consistent with past practice or changes made pursuant to any
collective bargaining agreements or existing contracts;

         (k) Adopted, modified, or terminated any bonus, profit-sharing,
incentive, severance or other plan or contract for the benefit of any of its
directors, officers, and employees, other than for changes which are required by
law or a collective bargaining agreement; or

         (l) Declared or paid any dividend or other distribution with respect to
the Common Shares except regular quarterly dividends not in excess of $0.075 per
share.


         SECTION 4.09 Real Property.

         (a) The Owned Real Property Schedule includes all material real
property interests owned in fee by the Company or its Subsidiaries and
identifies those interests which constitute Active Operating Properties and
Reserves and/or Operating Facilities.

         (b) The Company and its Subsidiaries shall promptly provide the
following information with regard to each material parcel or tract of owned real
property (exclusive of oil and gas properties): (i) an identification of the
deed or other instrument of conveyance; (ii) recording information (if
available, and if not, the state and county where the relevant parcel or tract
is located); (iii) the names of at least one grantor and one grantee thereunder;
and (iv) the approximate size of the relevant parcel or tract when acquired. The
Company and its Subsidiaries shall also promptly provide an accurate listing of
all owned real property within the currently existing five (5) year mining plan
of the Company and its Subsidiaries.

         (c) The Leased Real Property Schedule includes all material real
property interests in which the Company has or its Subsidiaries have a leasehold
interest and identifies those leasehold interests which constitute Active
Operating Properties and Reserves and/or Operating Facilities.

         (d) The Company and its Subsidiaries shall promptly provide the
following information with regard to each material parcel or tract of leased
real property (exclusive of oil and gas properties): (i) an identification of
the lease or sublease agreement and any and all amendments, modifications and
side letters; (ii) recording information (if available), and if not, the state
and county where the relevant parcel or tract is located; (iii) the names of at
least one 

<PAGE>

lessor and one lessee (or sublessor or sublessee) thereunder; (iv) the
approximate size of the relevant parcel or tract leased thereunder when
acquired; and (v) the term thereof, including any extension options. The Company
and its Subsidiaries shall also promptly provide an accurate listing of all
leased real property within the currently existing five (5) year mining plan of
the Company and its Subsidiaries.

         (e) Except as set forth on the Real Property Disclosure Schedule and
except Permitted Encumbrances which individually or in the aggregate do not
constitute a Material Adverse Effect on the Company, the Company and its
Subsidiaries hold (i) good and marketable Mining Title, as hereinafter defined,
to the Active Operating Properties and Reserves and to the Operating Facilities
and (ii) as to the Other Real Property, an interest of record or a leasehold
interest from a person or entity which the Company or its Subsidiaries
reasonably believe has an interest of record. As used in this subparagraph (e),
Mining Title means fee simple title to surface and/or coal or an undivided
interest in fee simple title thereto or a leasehold interest in all or an
undivided interest in surface and/or coal together with (i) for Active Operating
Properties and Reserves designated for surface mining no less than those
easements, licenses, privileges, rights, and appurtenances as are necessary to
mine, remove, and transport coal by surface mining methods; (ii) for Active
Operating Properties and Reserves designated for underground mining, no less
than those easements, licenses, privileges, rights, and appurtenances as are
necessary to mine, remove, and transport coal by underground mining methods; and
(iii) for Operating Facilities, no less than those easements, licenses,
privileges, rights, and appurtenances as are necessary to operate the Operating
Facilities in the manner presently operated.

         (f) Except as disclosed in the Real Property Disclosure Schedule,
neither the Company nor its Subsidiaries have received any written notice
alleging that the Company or its Subsidiaries are in default under any material
lease. Except as disclosed on the Real Property Disclosure Schedule and except
as could not reasonably be expected to have a Material Adverse Effect on the
Company, neither the Company nor its Subsidiaries are in default under any lease
relating to Active Operating Properties and Reserves, Operating Facilities or
Other Real Property.

         (g) Except for leases which would not have a Material Adverse Effect on
the Company if found to be invalid or unenforceable, each of the leases on the
Leased Real Property Schedule is, and will be on and immediately following the
Closing Date, valid and enforceable against the lessor or other parties thereto
in accordance with its terms. To the Knowledge of the Company there are no
unwritten modifications to such leases.

         (h) To the Knowledge of the Company, except as set forth on the Real
Property Disclosure Schedule, neither the Company nor any of its Subsidiaries
have received any notice of claims that the Company or any Subsidiary has mined
any coal that did not belong to it, or mined any coal in such reckless or
imprudent fashion as to give rise to any material claims for loss, waste or
trespass.

         (i) All existing maps, surveys, title insurance policies, title
insurance, abstracts and other evidence of title have been made available by the
Company and its 

<PAGE>


Subsidiaries to the Purchaser.

         (j) To the Knowledge of the Company, and other than set forth on the
Real Property Disclosure Schedule, no condemnation or eminent domain proceeding
against any part of such property is pending or threatened, and the Company and
its Subsidiaries have no knowledge that any such proceeding is contemplated.

         (k) To the Knowledge of the Company, except as set forth on the Real
Property Disclosure Schedule, there are no adverse possession claims regarding
those real property interests which constitute Active Operating Properties and
Reserves and/or Operating Facilities.

         (l) "Permitted Encumbrances" as used in this Agreement means: (i)
rights of cotenants, if any; (ii) rights and easements of owners of undivided
interests in the property where the Company or its Subsidiaries own less than
100% of the fee interest; (iii) rights and easements of owners of interests in
the surface where the Company or its Subsidiaries do not own or lease the
surface; (iv) rights and easements of owners and lessees, if any, of coal or
other minerals, including oil and gas, where the Company or its Subsidiaries do
not own coal or other minerals; (v) rights and easements of owners and lessees
of other coal seams and other minerals, including oil and gas, not owned or
leased by the Company or its Subsidiaries; (vi) all existing easements or rights
of way, whether of record or apparent on the premises, including, but not
limited to, roads, highways, pipelines, underground gas storage rights, railroad
and utility easements or rights-of-way, none of which could reasonably be
expected to have a Material Adverse Effect on the Company; (vii) real estate
taxes not yet due and payable; (viii) statutory liens for mechanics, materialmen
or laborers for work and labor delivered to or performed on the premises
securing obligations of the Company or its Subsidiaries or their contractors
incurred in the Ordinary Course of Business and in the aggregate do not exceed
$1,000,000; (ix) specific encumbrances and exceptions noted in a Disclosure
Schedule; (x) conditions, encumbrances, and covenants of record and other title
exceptions, defects and encumbrances which could not reasonably be expected to
have a Material Adverse Effect on the Company; (xi) terms, agreements,
provisions, conditions, and limitations contained in leases and rights of
lessors, their heirs, executors, administrators, successors, and assigns
(applies to leasehold estates); (xii) farm, grazing, hunting, recreational and
residential leases in which the Company or any Subsidiary is the lessor; (xiii)
royalty obligations to sellers or transferors of fee coal or lease properties;
(xiv) rights of others to subjacent or lateral support and absence of subsidence
rights; and (xv) rights of repurchase when mining and reclamation are completed.

         SECTION 4.10 Personal Property. Except as would not have a Material
Adverse Effect on the Company:

         (a) The Company and its Subsidiaries have good and marketable title to,
or a valid leasehold interest in, the personal property owned or used by them,
including the Leased Personal Property that is listed on the Personal Property
Lease Schedule (but excluding, to the extent applicable, any leased real
property), in each case, free and clear of all Liens.

<PAGE>

         (b) The machinery and equipment owned or used by the Company and its
Subsidiaries have been maintained in accordance with industry practice, are in
generally good operating condition and adequate for carrying out the purposes
for which such personal property is employed, except for normal obsolescence and
wear and tear incurred in the ordinary course of business.

         SECTION 4.11 Tax Matters. The Company and its Subsidiaries have filed
all income Tax Returns and other Tax Returns required to be filed by them,
excluding those Tax Returns the failure of which to file would not have a
Material Adverse Effect on the Company. All Tax Returns for the Company in
respect of all years not barred by the statute of limitations have heretofore
been made available by the Company to Purchaser and such returns are true,
correct, and complete in all material respects. Except as set forth on the Taxes
Schedule or the Litigation Schedule: (a) all Taxes shown thereon as owing by the
Company and the Subsidiaries on all such Tax Returns have been fully paid; (b)
to the Company's Knowledge, (i) the provision for taxes on the March Balance
Sheet and the June Balance Sheet are sufficient for all accrued and unpaid Taxes
as of the date thereof and (ii) all material Taxes which the Company or any of
its Subsidiaries is obligated to withhold from amounts owing to any employee,
creditor or third party have been fully paid or properly accrued; (c) there are
no material claims pending, or to the Company's Knowledge, threatened, for Taxes
against the Company or any Subsidiary with respect to any period ending as of or
prior to the date hereof; (d) neither the Company nor any Subsidiary has waived,
or agreed to the extension of, the statute of limitations with respect to any
Tax Return; (e) neither the Company nor any Subsidiary has any liability for
Taxes for any Person (other than the Company and its Subsidiaries) under
Treasury Regulation 1.1502-6 (or any similar provision of state, local or
foreign income Tax law) as a transferee or successor by contract or otherwise;
and (f) the Company and its Subsidiaries have maintained their respective
records with respect to Taxes in a commercially reasonable manner.

         SECTION 4.12 Contracts and Commitments.

         (a) Except as set forth on the Contract Schedule, the Lease Schedules,
the Employee Benefits Schedule or the Development Schedule, neither the Company
nor any of its Subsidiaries is a party to any: (i) collective bargaining
agreement with any labor union; (ii) bonus, pension, profit sharing, retirement
or other form of deferred compensation plan which may provide compensation or
benefits of at least Two Hundred Thousand Dollars ($200,000.00) or which when
aggregated with all such other plans not included on the schedules may provide
compensation or benefits of at least One Million Dollars ($1,000,000.00); (iii)
stock purchase, stock option, stock appreciation or similar plan; (iv) contract
for the employment of any officer, individual employee or other person on a
full-time or consulting basis involving an annual compensation commitment by the
Company or a Subsidiary in excess of $200,000; (v) agreement or indenture
relating to the borrowing of money in excess of $1,000,000 or to mortgaging,
pledging or otherwise placing a Lien (other than a Permitted Lien) on any
portion of the Company's assets, other than assets that, individually or in the
aggregate, would not be material to the operations of the Company and, its
Subsidiaries in the ordinary course of business consistent with past practice;
(vi) guaranty of any obligation for borrowed money in excess of 

<PAGE>

$1,000,000; (vii) lease or agreement under which it is lessee of, or holds or
operates any personal property owned by any other party, for which the annual
rental exceeds $250,000, (viii) contract or group of related contracts with the
same party for the supply of coal to any Person in an amount of more than
$3,000,000 or providing for deliveries extending beyond December 31, 1998; (ix)
contract or group of related contracts with the same party for the purchase of
inventories, supplies or services, under which the undelivered balance of such
inventories, supplies or services has a selling price in excess of $1,000,000
(other than contracts to purchase coal in the ordinary course of business in an
amount less than $3,000,000); (x) contract or group of related contracts with
the same party for the sale of products or services (other than coal sales or
supply contracts under which the undelivered balance of such products or
services has a sales price in excess of $1,000,000; (xi) tariff agreements and
other transportation contracts for the shipment of coal which provides for
transportation costs of, or reasonably projected to be, more than $250,000 per
year; (xii) contract which prohibits or materially limits the Company or a
Subsidiary in any material respect from freely engaging in business in the
United States or anywhere else in the world; or (xiii) any other contract or
commitment (A) involving the payment by or to the Company or any of its
Subsidiaries of $1,000,000 or more (whether in cash or other assets) in any 12
month period or $5,000,000 or more (whether in cash or other assets) in the
aggregate over the life of the contract or (B) the termination of which or loss
of the benefits thereunder would have a Material Adverse Effect on the Company.
"Material Contract" means any contract, agreement or other arrangement of a type
referred to in any of clauses (i) through (xiii) of this Section 4.12(a).

         (b) Purchaser either has been supplied with, or has been given access
to, a true and correct copy of all written contracts which are referred to on
the Contracts Schedule and the Lease Schedules, together with all material
amendments, arbitration decisions and grievance settlements related to
collective bargaining agreements and contracts with any labor union, waivers or
other changes thereto.

         (c) Each contract listed on the Contracts Schedule or the Lease
Schedule is legal, valid, binding, enforceable and in full force and effect, and
will continue to be legal, valid, binding, enforceable and in full force and
effect following consummation of the transactions contemplated hereby, except as
would not individually or in the aggregate, have a Material Adverse Effect on
the Company. To the Company's Knowledge, neither the Company nor its
Subsidiaries are in default, breach or violation (or would be in default, breach
or violation with notice or lapse of time, or both) under any contract listed on
the Contracts Schedule or the Lease Schedules, except for such defaults which
individually or in the aggregate, would not have a Material Adverse Effect on
the Company and except that Leased Real Property shall be excluded from this
representation.

         SECTION 4.13 Intellectual Property. Set forth on the attached
Intellectual Property Schedule are all of the material patents, trademarks,
copyrights and service marks (and any registrations or applications therefor)
and all material trade names and corporate names used 

<PAGE>

in the conduct of the business of the Company and its Subsidiaries as now
conducted (collectively, the "Intellectual Property"). Except as set forth on
the Intellectual Property Schedule, the Company and its Subsidiaries own or have
sufficient rights to use the Intellectual Property to conduct their current
operations. Except as set forth on the Intellectual Property Schedule, neither
the Company nor any Subsidiary has received any written notices of material
infringement or misappropriation from any third party with respect to the
Intellectual Property, and to the Company's Knowledge, neither the Company nor
any Subsidiary has infringed nor is it currently infringing the intellectual
property of any other Person, except where such infringement would not
individually or in the aggregate, have a Material Adverse Effect.

         SECTION 4.14 Licenses and Permits. Except as would not have a Material
Adverse Effect on the Company, the Company and its Subsidiaries possess all
necessary mining permits, leases, mining rights, mining licenses, re-mining
agreements and similar authorizations and approvals (collectively, the "Mining
Permits"), including those listed on the Mining Permits Schedule, and other
licenses, permits, certifications and other governmental or regulatory
authorizations and approvals, including those listed on the Other Permits
Schedule (collectively, "Permits"), necessary to enable the Company and its
Subsidiaries to carry on their mining business as presently conducted, and all
such permits are valid, and in full force and effect and there exists no default
thereunder. Except as set forth on the Mining Permits Schedule, to the Company's
Knowledge, the Company and its Subsidiaries have obtained all material Mining
Permits necessary for the Company and its Subsidiaries to conduct the mining
operations proposed to be conducted under the Company's current five-year mining
plan (the "Mining Plan") within the twelve month period commencing on the date
of this Agreement. Except as set forth on the Mining Permits Schedule, to the
Company's Knowledge, the Company and its Subsidiaries have initiated the process
to obtain all material Mining Permits necessary for the Company and its
Subsidiaries to conduct the mining operations proposed to be conducted under the
Mining Plan within the twelve month period following the twelve month period
commencing on the date of this Agreement. Except as set forth on the Mining
Permits Schedule, to the Company's Knowledge, with respect to any material
Mining Permits which can reasonably be expected to take more than two years to
obtain, the Company and its Subsidiaries have initiated the process so that such
Mining Permits may reasonably be expected to be issued not less than six months
prior to the applicable commencement date for the mining operations covered by
such Mining Permits. Except as disclosed on the Mining Permits Schedule, based
upon a good faith determination of Senior Managers of the Company's
Subsidiaries, Engineering and/or Permitting Departments, the time remaining
prior to the commencement of all mining operations under the Mining Plan is
sufficient to obtain any Mining Permits not yet obtained by the Company and its
Subsidiaries which are necessary to conduct the mining operations contemplated
in the Mining Plan not less than six months prior to the proposed commencement
of such mining operations under the Mining Plan. Except as set forth on the
Permits Schedule or the Litigation Schedule, to the Company's Knowledge, there
is no pending or threatened litigation or other proceeding under which any
material Mining Permit or other Permit could reasonably be expected to be
revoked, terminated or suspended.

         SECTION 4.15 Litigation. Except as set forth on the attached Litigation

<PAGE>


Schedule, there are no actions, suits or proceedings pending or, to the
Company's Knowledge, threatened against the Company or any of its Subsidiaries
(or, in each case, in which the Company or its Subsidiaries is a party), at law
or in equity, or before or by any federal, state, municipal or other
governmental department, commission, board, bureau, agency or instrumentality,
domestic or foreign, except those which are not individually or in the
aggregate, reasonably likely to have a Material Adverse Effect on the Company.
Except as set forth on the attached Litigation Schedule, neither the Company nor
any of its Subsidiaries is subject to any outstanding judgment, injunction,
order or decree of any court or Government Entity to which this Company or its
Subsidiaries is a party which adversely affects the operations of the Company or
such Subsidiary.

         SECTION 4.16 Governmental Consents, etc.. Except as set forth in
Section 4.05, on the Governmental Consents Schedule or in connection with the
Purchaser's financing of the transactions contemplated in this Agreement, no
consent, waiver, approval or authorization, order, permit or qualification of,
or declaration to or filing with, any governmental or regulatory authority is
required in connection with the execution, delivery or performance of this
Agreement by the Company or the consummation by the Company of any other
transaction contemplated hereby, the failure of which individually or in the
aggregate have a Material Adverse Effect on the Company.

         SECTION 4.17 Employee Benefit Plans.

         (a) Except as listed on the Employee Benefits Schedule or the Contracts
Schedule attached hereto, with respect to employees of the Company and its
Subsidiaries , (i) neither the Company nor any of its Subsidiaries maintains or
contributes to any qualified defined contribution retirement plan, or qualified
defined benefit pension plan (either being referred to as a "Pension Plan") and
(ii) the Company does not maintain or contribute to any welfare benefit plans
(as that term is defined in Section 3(1) of ERISA) (the "Welfare Plans"). The
Pension Plans and the Welfare Plans are collectively referred to as the "Plans."
Each of the Pension Plans (other than the Multiemployer Plans) has received a
favorable determination letter from the Internal Revenue Service that such Plan
is a "qualified plan" under Section 401(a) of the Internal Revenue Code of 1986,
as amended (the "Code"), the related trusts are exempt from tax under Section
501(a) of the Code, and the Company is not aware of any facts or circumstances
that would jeopardize the qualification of such Pension Plan. The Plans (other
than any Multiemployer Plans) comply in form and in operation in all material
respects with the requirements of the Code and the Employee Retirement Income
Security Act of 1974, as amended ("ERISA") and any other laws, rules and
regulations applicable thereto.

         (b) With respect to the Plans (other than the Multiemployer Plans), (i)
all required contributions have been made or properly accrued, (ii) there are no
actions, suits or claims pending, other than routine claims for benefits, and
(iii) there have been no "prohibited transactions" (as that term is defined in
Section 406 of ERISA or Section 4975 of the Code).

         (c) The Company has furnished to Purchaser true and complete copies of
(i) the Plans and summary plan descriptions, (ii) the most recent determination
letter received 

<PAGE>

from the Internal Revenue Service regarding the Plans (other than the
Multiemployer Plans) and (iii) the latest financial statements for the Plans
(other than the Multiemployer Plans) and latest available actuarial reports.

         (d) Neither the Company nor any Subsidiary, nor, to the Company's
Knowledge, any of its directors, officers, employees or any other "fiduciary,"
as such term is defined in Section 3 of ERISA, has committed any material breach
of fiduciary responsibility imposed by ERISA or any other applicable law with
respect to the Plans which would subject Parent or Purchaser or any of their
respective directors, officers or employees to any material liability under
ERISA or any applicable law.

         (e) The Company has not incurred any material liability for any tax or
civil penalty imposed by Section 4975 of the Code or Section 502 of ERISA.

         (f) Except as listed on the Employee Benefits Schedule attached hereto,
(i) no Plan is a Multiemployer Plan (as defined in Section 4001(a)(3) of ERISA)
("Multiemployer Plan") or a plan that has two or more contributing sponsors at
least two of whom are not under common control, within the meaning of Section
4063 of ERISA (a "Multiple Employer Plan"), and (ii) none of the Company and its
Subsidiaries nor any ERISA Affiliates has incurred any withdrawal liability that
has not been satisfied in full, nor been advised by a Multiemployer Plan that
any withdrawal liability or potential liability, as a result of a complete or
partial withdrawal from such Multiemployer Plan, as those terms are defined in
Part 1 of Subtitle E of Title IV of ERISA, has been incurred. With respect to
each Plan that is a Multiemployer Plan, except as set forth in the Employee
Benefits Schedule: (1) none of the Company and its Subsidiaries, nor any of the
respective ERISA Affiliates, has received any written notification, nor does the
Company have Knowledge that any such Plan is in reorganization, has been
terminated or is insolvent, or (2) reasonably expected to be in reorganization,
to be insolvent, or to be terminated, and (3) the Company and its Subsidiaries
and their respective ERISA Affiliates have made all required contributions to
such Plans substantially when due.

         (g) The Company has not incurred any liability (i) under Title IV of
ERISA, (ii) under section 302 of ERISA, (iii) under sections 412 and 4971 of the
Code, (iv) as a result of a failure to comply with the continuation coverage
requirements of section 601 et seq. of ERISA and section 4980B of the Code, (v)
under Section 701, et seq. of ERISA, or (vi) under corresponding or similar
provisions of foreign laws or regulations that would be a liability of the
Company following the Effective Time, other than such liabilities under the
Plans, or where such liability would not individually or in the aggregate have a
Material Adverse Effect on the Company. No Plan subject to Title IV of ERISA nor
any related trusts have been terminated or is or has been the subject of
termination proceedings pursuant to Title IV of ERISA. Neither the Company nor
any ERISA Affiliate of the Company has engaged in any transaction described in
Section 4069 or Sections 4204 or 4212(c) of ERISA.

<PAGE>

         (h) Except as disclosed in the Employee Benefits Schedule or the SEC
Reports, the Company has no liability for life, health, medical or other welfare
benefits to former employees or beneficiaries or dependents thereof, except for
health continuation coverage as required by Section 4980B of the Code or Parts 6
and 7 of Title I of ERISA.

         (i) Except as disclosed in the Employee Benefits Schedule, the
Contracts Schedule and the Employee Arrangements Schedule, neither the execution
and delivery of this Agreement nor the consummation of the transactions
contemplated hereby will (either alone or in conjunction with any other event)
result in, cause the accelerated vesting or delivery of, or increase the amount
or value of, any payment or benefit to any employee, officer or director of the
Company or any of its Subsidiaries.

         SECTION 4.18 Insurance. The attached Insurance Schedule lists the
material insurance policies maintained by the Company and its Subsidiaries and
their respective coverage and renewal dates. All of such insurance policies are
in full force and effect and the Company is not in material default with respect
to its obligations under any of such insurance policies. No notice of
cancellation or termination or rejection of any claim in excess of $1,000,000
has been received by the Company or its Subsidiaries with respect to any such
policy in the last year (or such shorter period as such entity has been in
existence or has been a Subsidiary of the Company). The Company and each of its
Subsidiaries has been covered during the past five years (or such shorter period
as such entity has been in existence or has been a Subsidiary of the Company) by
insurance in scope and amount customary and reasonable for the businesses in
which they have engaged during such period, and to the Company's Knowledge, all
contractors, lessees and licensees which performed services and/or engaged in
the production of coal on behalf of the Company have been covered by insurance
in scope and amount customary and reasonable for the business in which they have
engaged during such period.

         SECTION 4.19 Compliance with Laws. Except as set forth on the Legal
Compliance Schedule, the Taxes Schedule, the Developments Schedule or the
Litigation Schedule, to the Company's Knowledge, the Company and each of its
Subsidiaries is in compliance with every statute, rule, restriction, law,
regulation, order, judgment or decree of any governmental entity applicable to
it or by which it is bound (other than Environmental and Safety Requirements and
any permit requirements or related regulations), including, without limitation,
the Fair Labor Standards Act or regulations under such act or other laws and
regulations relating to wages, hours, labor agreements, the payment of Social
Security and similar taxes, unemployment or workers' compensation including
Black Lung benefits and obligations and the West Virginia Wage Payment
Collections Payment Act and/or similar state laws and regulations, except for
such failures as would not have a Material Adverse Effect on the Company. Except
as set forth on the Legal Compliance Schedule, the Taxes Schedule or the
Developments Schedule, neither the Company nor any Subsidiary has received from
any governmental or regulatory authority any written notice alleging any
material violation of law or claiming any material liability of the Company or
any of its Subsidiaries as a result of any such alleged material violation.

         SECTION 4.20 Environmental, Mining and Safety Matters. Except as set

<PAGE>

forth on the attached Environmental Compliance Schedule:

         (a) The Company and its Subsidiaries are in compliance in all material
respects with all Environmental, Mining, and Safety Requirements (including
without limitation in cases where the Company or its Subsidiaries operate any
property or facility under a contractual arrangement but are not the named
permittee under relevant surface mining permits), and have filed all notices and
compliance reports required to be filed to maintain such compliance in all
material respects under any Environmental, Mining, and Safety requirements
(including without limitation, where material, notices and reports indicating
past or present treatment, storage or disposal, or reporting a spill or release
into the environmental, of any Hazardous Substances, Oils, Pollutants or
Contaminants), and (i) neither the Company nor any of its Subsidiaries has
received any written communication or other written notice from any Government
Entity (which has not been substantially resolved) alleging that the Company or
any of its Subsidiaries is not in compliance, in all material respects, with
Environmental, Mining, and Safety Requirements, (ii) to the Company's Knowledge
all contract mining activities performed on Real Property owned or leased by the
Company or any of its Subsidiaries are in compliance, in all material respects,
with all Environmental, Mining, and Safety Requirements, (iii) to the Company's
Knowledge, no material action, suit, proceeding, hearing, investigation, charge,
complaint, claim, demand, or notice has been filed or commenced against or
otherwise given to the Company or any of its Subsidiaries alleging any failure
so to comply in all material respects, and, to the Company's Knowledge, no such
action, suit, proceeding, hearing, investigation, charge, complaint, claim,
demand or notice has been threatened, and (iv) neither the Company nor any of
its Subsidiaries has any material contingent liabilities with respect to its
business under any Environmental, Mining, or Safety Requirements.

         (b) (i) Neither the Company nor any of its Subsidiaries has received
notice to the effect that it is a potentially responsible party, or that any
Governmental Entity or other individual is seeking information in connection
with or advising it that it is responsible for, or potentially responsible for
costs under Environmental, Mining, and Safety Requirements, including, without
limitation, CERCLA, for cleanup of or investigatory, remedial, or other
corrective action related to Hazardous Substances, Oils, Pollutants or
Contaminants at any Real Property currently or previously owned or leased by the
Company or any of its Subsidiaries at any other location, (ii) no Real Property
owned or leased by the Company nor any of its Subsidiaries is listed on any
federal or state contaminated site list, including the national priority list
under CERCLA, the CERCLIS, or any state counterparts, and (iii) neither the
Company nor any of its Subsidiaries has knowledge of any release of Hazardous
Substances, Oils, Pollutants, or Contaminants in quantities requiring
investigation or cleanup at any of the Real Property owned or leased by the
Company or any of its Subsidiaries or at any location where, in any of the
foregoing cases (i)-(iii) the Company or any of its Subsidiaries could
reasonably be excepted to bear material liability.

         (c) Each of the Company and its Subsidiaries has provided the Purchaser
(to the extent in the possession of the Company or its Subsidiaries) with all
material environmental audits, site assessments, or reports, all Environmental
Impact Statements, and all liability studies 

<PAGE>

prepared within the past five years by or for the Company or any of its
Subsidiaries, or by any third party, including Government Entities or insurance
companies.

         (d) For purposes of this Agreement, "Release" shall mean any emission,
spill, release, discharge or threatened release into or upon: (i) the air; (ii)
the soils or any improvements located thereon; (iii) the surface water or ground
water; or (iv) the sewer, septic system or waste treatment, storage or disposal
system.

         SECTION 4.21 Affiliated Transactions. Except as set forth on the
Affiliated Transactions Schedule, the Employee Benefits Schedule, the
Developments Schedule or the contracts Schedule, no officer, director, or
principal stockholder of the Company or, to the Company's Knowledge, any
individual in such officer's or director's immediate family is a party to any
material agreement, contract, commitment or transaction with the Company or any
of its Subsidiaries or has any interest in any material real or personal
property used by the Company or any of its Subsidiaries other than arrangements
with employees that are available to similarly situated employees.

         SECTION 4.22 Brokers. Except for the fees of CSFB pursuant to the
engagement letter listed on the Contracts Schedule, none of the Company, any of
its Subsidiaries, or any of their respective officers, directors or employees
has employed any broker or finder or incurred any liability for any brokerage
fees, commissions or finder's fees in connection with the transactions
contemplated by this Agreement.

         SECTION 4.23 Labor Relations. Except as set forth in the Compliance
Schedule or the Litigation Schedule:

         (a) The Company and its Subsidiaries are in compliance with applicable
laws respecting employment and employment practices, terms and conditions of
employment and wages and hours, excluding Environmental and Safety Requirements,
except for such failures as would not, individually or in the aggregate, have a
Material Adverse Effect on the Company. The Company and its Subsidiaries are in
compliance with applicable collective bargaining agreements, and arbitration,
administrative and judicial decisions interpreting and/or affecting such
agreements, except for such failures as would not, individually or in the
aggregate, have a Material Adverse Effect on the Company.

         (b) There is no unfair labor practice charge or complaint or any other
labor employment matter against or involving the Company or any Subsidiary
pending or threatened before the National Labor Relations Board or any court of
law as of the date of this Agreement. There is, and, except as disclosed on the
Compliance Schedule, since January 1, 1996 there has been, no labor organizing
activity, strike, dispute, lockout, slowdown or stoppage actually pending or, to
the knowledge of the Company or any of its Subsidiaries, threatened against the
Company or any of its Subsidiaries.

         (c) There is, and except as disclosed on the Compliance Schedule, since
January 1, 1994 there has been, no certified collective bargaining
representative of the 

<PAGE>

Company's or any of its Subsidiaries' employees, no demand made to the Company
or its Subsidiaries for recognition by any collective bargaining representative,
and no petition for an election filed with the National Labor Relations Board or
any other governmental authority or Person with respect to the Company's or any
of its Subsidiaries' employees.

         (d) Except as set forth on the Litigation Schedule, there are no
charges, investigations administrative proceedings or formal complaints of
discrimination (including discrimination based upon sex, age, marital status,
race, color, religion, national origin, sexual preference, disability, handicap
or veteran status) pending or, to the knowledge of the Company or any of its
Subsidiaries, threatened before the Equal Employment Opportunity Commission or
any federal, state or local agency or court against the Company or any
Subsidiary.

         SECTION 4.24 Permit Blocking. Except as set forth in the Compliance
Schedule or Litigation Schedule, neither the Company nor any of its Subsidiaries
has been notified in writing by the Federal Office of Surface Mining or the
agency of any state administering the Surface Mining Control and Reclamation Act
of 1977, as amended ("SMCRA"), or any comparable state statute, that it is (i)
ineligible to receive additional surface mining permits that are material to its
business; or (ii) under investigation to determine whether its eligibility to
receive such permits should be revoked, i.e., "permit block," and, to the
Company's Knowledge, there is no basis therefor.

         SECTION 4.25 Section 6 of the Joint Development Agreement. No
Acquisition Closing (as such term is defined in the Joint Development Agreement)
or other event has occurred, that prevents, prohibits or limits or otherwise
renders moot any rights of the Company and/or one or more of its Subsidiaries
pursuant to Section 6 of the Joint Development Agreement (including, without
limitation, the right thereunder to withdraw from the Project (as defined in the
Joint Development Agreement)).

         SECTION 4.26 Takeover Provisions Inapplicable. Assuming the accuracy
and correctness of Section 5.06 hereof, as of the date hereof and at all times
on or prior to the Effective Time, Section 203 of the GCL is and shall be
inapplicable to the Merger and the transactions contemplated hereby.

                                   ARTICLE V

           REPRESENTATIONS AND WARRANTIES OF PARENT AND THE PURCHASER

         Parent and the Purchaser represent and warrant to the Company as
follows:

         SECTION 5.01 Organization and Qualification. Parent is a corporation
duly organized, validly existing and in good standing under the laws of
Delaware. The Purchaser is a corporation duly organized, validly existing and in
good standing under the laws of the State of Delaware. Parent and Purchaser each
have the requisite corporate power and authority to own, 

<PAGE>

operate or lease its properties and to carry on its business as it is now being
conducted and to enter into this Agreement and to perform all of their
respective obligations hereunder.

         SECTION 5.02 Authority Relative to this Agreement. The execution and
delivery of this Agreement by Parent and the Purchaser and the consummation by
Parent and the Purchaser of the transactions contemplated hereby have been duly
and validly authorized and approved by the Boards of Directors of Parent and the
Purchaser and by Parent as stockholder of the Purchaser and no other corporate
proceedings on the part of Parent or the Purchaser are necessary to authorize or
approve this Agreement or to consummate the transactions contemplated hereby.
This Agreement has been duly executed and delivered by each of Parent and the
Purchaser and, assuming the due and valid authorization, execution and delivery
by the Company, each such agreement constitutes a valid and binding obligation
of each of Parent and the Purchaser enforceable against each of them in
accordance with its terms, except that such enforceability (i) may be limited by
bankruptcy, insolvency, moratorium or other similar laws affecting or relating
to the enforcement of creditors' rights generally and (ii) is subject to general
principles of equity.

         SECTION 5.03 No Conflict; Required Filings and Consents.

         (a) None of the execution and delivery of this Agreement by Parent or
the Purchaser, the consummation by Parent or the Purchaser of the transactions
contemplated hereby or compliance by Parent or the Purchaser with any of the
provisions hereof will (i) conflict with or violate the organizational documents
of Parent or the Purchaser, (ii) conflict with or violate any statute,
ordinance, rule, regulation, order, judgment or decree applicable to Parent or
the Purchaser, or any of their Subsidiaries, or by which any of them or any of
their respective properties or assets may be bound or affected, or (iii) result
in a Violation pursuant to any note, bond, mortgage, indenture, contract,
agreement, lease, license, permit, franchise or other instrument or obligation
to which Parent or the Purchaser, or any of their Subsidiaries, is a party or by
which any of their respective properties or assets may be bound or affected,
except for any such actions which would not have a material adverse effect on
Parent or adversely affect the ability of Parent or the Purchaser to consummate
the transactions contemplated hereby.

         (b) None of the execution and delivery of this Agreement by Parent and
the Purchaser, the consummation by Parent and the Purchaser of the transactions
contemplated hereby or compliance by Parent and the Purchaser with any of the
provisions hereof will require any Consent of any Government Entity or third
party, except for (i) compliance with any applicable requirements of the
Exchange Act, (ii) the filing of a certificate of merger, or, if permitted, a
certificate of ownership and merger, pursuant to the GCL, and (iii) compliance
with the Hart-Scot-Rodino Act and any requirements of any foreign or
supranational Antitrust Laws, and (iv) Consents the failure of which to obtain
or make would not have a material adverse effect on Parent or adversely affect
the ability of Parent or the Purchaser to consummate the transactions
contemplated hereby.


         SECTION 5.04 Information. None of the information supplied or to be
supplied by Parent and the Purchaser in writing specifically for inclusion in
(a) the Schedule

<PAGE>

14D-1, (b) the Offer Documents or (c) the Other Filings will, at the respective
times filed with the SEC or such other Governmental Entity contain any untrue
statement of a material fact or omit to state any material fact required to be
stated therein or necessary in order to make the statements made therein, in
light of the circumstances under which they were made, not misleading.

         SECTION 5.05 Financing. The Purchaser is a newly formed corporation
which has not conducted any business other than in connection with the
transactions contemplated by this Agreement. The Purchaser has received a
written commitment (the "Commitment Letters") to obtain, subject to the terms
and conditions therein, the funds necessary for the consummation of the
transactions contemplated hereby, including payment of the Offer Price and the
Merger Consideration with respect to all Common Shares and all payments with
respect to Options and all related costs and expenses. The Purchaser has
delivered true, correct and complete copies of the Commitment Letters to the
Company. The Purchaser has paid all commitment fees required to be paid and
taken all other actions required to cause such Commitment Letters to be
effective and to constitute the valid commitment of the issuer of such letter,
and each such commitment Letter is a valid and binding commitment of the
Purchaser and the issuer thereof. The Purchaser is not, as of the date hereof,
aware of any fact, occurrence or condition that makes any of the assumptions or
statements therein inaccurate in any material respect or that would cause the
commitments provided in the Commitment Letters to be terminated or ineffective
or any of the conditions contained therein not to be met.

         SECTION 5.06 Parent and Purchaser Not an Interested Stockholder. As of
the date of this Agreement, neither Parent nor Purchaser nor any of their
affiliates is an "Interested Stockholder" as such term is defined in Section 203
of the GCL.

         SECTION 5.07 No Knowledge of Misrepresentations or Omissions. Neither
Parent nor Purchaser has any actual knowledge that (i) the representations and
warranties of the Company in this Agreement are not true and correct in all
material respects or (ii) there are any material errors in, or material
omissions from, the Schedules to this Agreement which individually or in the
aggregate constitute a Material Adverse Effect on the Company.

         SECTION 5.08 Solvency. Assuming the correctness of the representations
and warranties in Article IV hereof, the Company and its Subsidiaries will
immediately after the Offer Purchase Closing and immediately after the Effective
Time be solvent and capable of meeting their obligations as they become due,
have assets exceeding their liabilities and have a reasonable amount of capital
for the conduct of their business. Parent and Purchaser will procure the
solvency opinion that is required by the Commitment Letters and will provide
that such opinion is addressed to and delivered to the Board as well as to the
issuer of the Commitment Letters. Additionally, Parent and Purchaser will assure
that a draft of such solvency opinion is provided to the Board and counsel to
the Company for their review and comment not less than three days prior to the
formal delivery thereof.


         SECTION 5.09 Disclaimer Regarding Estimates and Projections. In
connection with Parent or Purchaser's investigation of the Company and its
Subsidiaries, Parent 


<PAGE>

or Purchaser has received certain Company projections, including projected
statements of income from operations of the Company and its Subsidiaries for the
fiscal year ending in December 1997 and for succeeding fiscal years and certain
business plan information for such fiscal year and succeeding fiscal years. The
Company makes no representation or warranty with respect to such estimates and
projections and other forecasts and plans (including the reasonableness of the
assumptions underlying such estimates and projections and forecasts). In
addition, except as set forth herein, the Company makes no representation or
warranty with respect to information relating to historical income from
operations set forth in the Information Memorandum, in any supplemental due
diligence information provided to Parent or Purchaser, in connection with
discussions or access to management of the Company and its Subsidiaries, or
otherwise, and Parent and Purchaser acknowledge and agree that it is not relying
on such information in any manner whatsoever. The disclosures in the Schedules
hereto are to be taken as relating to the representations and warranties of the
Company as a whole. The inclusion of information in the Schedules hereto shall
not be construed as an admission that such information is material to the
Company or its Subsidiaries. In addition, matters reflected in the Schedules are
not necessary limited to matters required by this Agreement to be reflected in
such Schedules. Such additional matters are set forth for information purposes
only and do not necessarily include other matters of a similar nature.

                                   ARTICLE VI

                                    COVENANTS

         SECTION 6.01 Conduct of Business of the Company. Except as provided in
Section 6.09 hereof or as otherwise contemplated by this Agreement or with the
written consent of Parent or as set forth in the Developments or Contracts
Schedule, during the period from the date of this Agreement to the Offer
Purchase Closing, the Company will, and will cause each of its Subsidiaries to,
conduct its operations only in the ordinary course of business consistent with
past practice and will use all reasonable efforts, and will cause each of its
Subsidiaries to use all reasonable efforts, to preserve intact the business
organization of the Company and each of its Subsidiaries, to keep available the
services of its and their present officers and key employees, and to preserve
the good will of those having business relationships with it. Without limiting
the generality of the foregoing, and except as provided in Section 6.09 hereof,
as otherwise contemplated by this Agreement with respect to the Non-Mining
Assets, or with the written consent of Parent or as set forth in the
Developments Schedule or Contracts Schedule, the Company will not, and will not
permit any of its Subsidiaries to, prior to the Effective Time:

         (a) Adopt any amendment to its charter or by-laws or comparable
organizational documents;

         (b) Except for issuances of capital stock of the Subsidiaries to the
Company or a wholly owned subsidiary of the Company, and other than the issuance
of Common Shares pursuant to the exercise of Options outstanding on the date
hereof, issue, reissue, pledge or sell, or authorize the issuance, reissuance,
pledge or sale of (i) additional Common Shares or other 

<PAGE>

shares of capital stock of any class, or securities convertible into Common
Shares or other capital stock of any class, or any rights, warrants or options
to acquire any convertible securities or capital stock, or (ii) any other
securities in respect of, in lieu of, or in substitution for, Common Shares
outstanding on the date hereof;

         (c) Declare, set aside or pay any dividend or other distribution
(whether in cash, securities or property or any combination thereof) in respect
of any class or series of its capital stock other than between any of the
Company and any of its wholly owned Subsidiaries.

         (d) Split, combine, subdivide, reclassify or redeem, purchase or
otherwise acquire, or propose to redeem, purchase or otherwise acquire, any
Common Shares or any other capital stock;

         (e) Make any loans, advances or capital contributions to, or
investments in, any other person in excess of $500,000, except for loans,
advances, capital contributions or investments between any Subsidiary of the
Company and the Company or another wholly owned subsidiary of the Company;

         (f) Fail to (i) maintain (except for sales or other transactions not
constituting a breach of this Agreement) the Real Property in a manner
consistent with past practice, (ii) pay when due all Taxes, water and sewer
rents, assessments and insurance premiums affecting the Real Property, other
than those being contested in good faith for which appropriate reserves have
been established on the Company's or its Subsidiary's books and records, (iii)
timely comply with the terms and provisions of all Leases (including but not
limited to timely payment of all minimum and production royalties, other than
those being contested in good faith for which appropriate reserves have been
established on the Company's or its Subsidiary's books and records), contracts
and agreements relating to or affecting the Real Property and the use and
operation thereof, in each case, other than such failures that would not,
individually or in the aggregate, have a Material Adverse Effect on the Company;

         (g) Enter into, establish, adopt, amend or renew any material
employment, consulting, severance or similar agreements or arrangements with any
director, officer or employee; grant any salary or wage increase (other than in
the ordinary course of business consistent with past practice or as may be
required by law); or establish, adopt, amend, or increase benefits under, any
pension, retirement, stock option, stock purchase, savings, profit sharing,
deferred compensation, consulting, welfare benefit contract, plan or arrangement
(other than in the ordinary course of business consistent with past practice or
as may be required by law);

         (h) Enter into any material labor or collective bargaining agreement,
memorandum of understanding, grievance settlement or any other agreement or
commitment to or relating to any labor union, except in the ordinary course of
business consistent with past 

<PAGE>

practice;

         (i) Take any action that, if taken after March 31, 1998 but prior to
the date hereof, would have caused the representations and warranties contained
in Section 4.08 to be untrue in any material respect;


         (j) Consummate its investment in Louisiana Generating LLC, contemplated
by, or waive, modify or terminate in any manner adverse to the Company its
rights under Section 6 of, that certain Joint Development Agreement, dated
September 29, 1996, as amended, among the Company, Southern Electric
International, Inc. and NRG Energy Inc. (the "Joint Development Agreement"), in
connection with the transactions contemplated by that certain Asset Purchase and
Reorganization Agreement, dated as of July 30, 1996, with Ralph R. Mabey,
Trustee in Bankruptcy of Cajun Electric Power Cooperative, Inc. ("Cajun
Electric"), for the acquisition of substantially all of the non-nuclear assets
of Cajun Electric;

         (k) Waive, modify, amend or terminate any confidentiality, standstill
or other similar agreement (each a "Standstill Agreement") to which the Company
or any of its Subsidiaries is a party and which was entered into in connection
with the sale process undertaken by the Company to identify a purchaser of the
Company that resulted in the execution of this Agreement; or

         (l) Agree to take any of the foregoing actions prohibited under Section
6.01.

         Notwithstanding the foregoing, nothing herein shall limit the Company's
ability to, nor require the Company to obtain the consent of Parent in order to,
sell, convey or otherwise dispose of any of the Non-Mining Assets referred to on
the Non-Mining Assets Schedule attached hereto at any time following the date
hereof in any transaction approved by the Board; provided that, with respect to
any sale of assets, such sale is not to an Affiliate of the Company, such assets
are sold in an arms-length transaction, and the Company provides at least three
business days prior written notice of such sale to Parent.

         SECTION 6.02 Access to Information. From the date of this Agreement
until the Closing, the Company will, and will cause its Subsidiaries, and each
of their respective officers, directors, counsel, advisors and representatives
(collectively, the "Company Representatives") to, give Parent and the Purchaser
and their respective officers, employees, counsel, advisors and representatives
(collectively, the "Parent Representatives") full access (subject, however,
during the term of this Agreement and following any termination hereof, to
Parent and Purchaser keeping and causing their respective subsidiaries and
affiliates to keep such information confidential in a manner consistent with
existing confidentiality and similar non-disclosure obligations, including those
contained in the Confidentiality Agreement, and the preservation of attorney
client and work product privileges), during normal business hours, to the
offices and other facilities and to the books and records of the Company and its
Subsidiaries and will cause the Company Representatives to furnish Parent, the
Purchaser and the Parent Representatives to the extent available with such
financial and operating data and such other information with respect to the
business and operations of the Company and its Subsidiaries 

<PAGE>

as Parent and the Purchaser may from time to time reasonably request; provided
that if the Company determines in good faith that any such data or information
is competitively sensitive, Parent and the Company will reasonably agree to
appropriate limitations on the dissemination of such information within the
Purchaser's and Parent's respective organizations. Prior to the Offer Purchase
Closing, neither Parent or Purchaser nor the Parent Representatives shall
contact or in any manner communicate with the employees, customers, lessors and
suppliers of the Company and its Subsidiaries with respect to any matter related
to the transactions contemplated hereby, except with the prior consent of the
Company.

         SECTION 6.03 Reasonable Efforts Notice of Certain Developments.

         (a) Subject to the terms and conditions herein provided and to
applicable legal requirements, each of the parties hereto agrees to use
reasonable efforts to take, or cause to be taken, all action, and to do, or
cause to be done (in the case of the Company consistent with the fiduciary
duties of the Company's Board of Directors under applicable law), and to assist
and cooperate with the other parties hereto in doing, as promptly as
practicable, all things necessary, proper or advisable under applicable laws and
regulations to ensure that the conditions set forth in Article VII are satisfied
and to consummate and make effective the transactions contemplated by the Offer,
the Merger and this Agreement.

         (b) If at any time prior to the Effective Time any event or
circumstance relating to either the Company or Parent or the Purchaser or any of
their respective Subsidiaries, is discovered by the Company or Parent, as the
case may be, which should be set forth in an amendment to the Offer Documents or
Schedule 14D-9, the discovering party will promptly inform the other party of
such event or circumstance. If at any time after the Effective Time any further
action is necessary or desirable to carry out the purposes of this Agreement,
including the execution of additional instruments, the proper officers and
directors of each party to this Agreement shall take all such necessary action.

         (c) Parent and Purchaser covenant and agree to do all other things
reasonably necessary to obtain the financing necessary for fulfillment of the
Offer Financing Condition (whether from the issuers of the Commitment Letters or
from other sources), on terms and conditions that are not less favorable in the
aggregate to Parent and Purchaser than those contemplated by the Commitment
Letters.

         (d) Parent and Purchaser further covenant and agree that they will not,
at any time prior to the termination of this Agreement, terminate or modify,
amend or alter the obligations of the issuer of the Commitment Letter in any way
that would be materially adverse to the Parent's or Purchaser's ability to cause
the Offer Financing Condition to be satisfied.

         SECTION 6.04 Consents.

         (a) Each party hereby agrees to use its reasonable best efforts to file
the premerger notification report, and all other documents to be filed in
connection therewith, required by the HSR Act and the Premerger Notification
Rules promulgated thereunder 

<PAGE>


with the United States Federal Trade Commission ("FTC") and the United States
Department of Justice ("DOJ") as soon as practicable following the date hereof,
but in any event (i) with respect to Parent and Purchaser, within five days
following the date hereof and (ii) with respect to the Company, within ten days
following the date hereof. Each party shall respond promptly to any request for
additional information that may be issued by either FTC or DOJ and shall use
commercially reasonable efforts to assure that the waiting period required by
the HSR Act has expired or been terminated prior to the date that is 20 days
following the commencement of the Offer.

         (b) Each of the parties will use commercially reasonable efforts to
obtain as promptly as practicable all Consents of any Governmental Entity or any
other person required in connection with, and waivers of any Violations that may
be caused by, the consummation of the transactions contemplated by the this
Agreement.

         (c) In furtherance and not in limitation of the foregoing, Parent shall
use commercially reasonable best efforts to resolve such objections, if any, as
may be asserted with respect to the transactions contemplated by this Agreement
under any antitrust, competition or trade regulatory laws, rules or regulations
of any domestic or foreign government or governmental authority or any
multinational authority ("Antitrust Laws"). If any suit is instituted
challenging any of the transactions contemplated by this Agreement as violative
of any Antitrust Law, Parent shall take such action (including without
limitation, agreeing to hold separate or to divest any of the businesses,
product lines or assets of Parent or any of its affiliates or of any of the
Company, its Subsidiaries or affiliates (a "Business Unit") (but only if the
Business Units required to be held separate or divested do not in the aggregate
have a fair market value of more than $25,000,000 or revenues for the most
recently completed 12 months of more than $25,000,000) as may be required (a) by
the applicable government or governmental or multinational authority (including,
without limitation, the Antitrust Division of the United States Department of
Justice, the Federal Trade Commission or the European Economic Area) in order to
resolve such objections as such government or authority may have to such
transactions under such Antitrust Law, or (b) by any domestic or foreign court
or similar tribunal, in any suit brought by a private party or governmental or
multinational authority challenging the transactions contemplated by this
Agreement as violative of any Antitrust Law, in order to avoid the entry of, or
to effect the dissolution of, any injunction, temporary restraining order or
other order that has the effect of preventing the consummation of any of such
transactions. The entry by a court, in any suit brought by a private party or
governmental or multinational authority challenging the transactions
contemplated by this Agreement as violative of any Antitrust Law, of an order or
decree permitting the transactions contemplated by this Agreement, but requiring
that any Business Units of any of Parent or its affiliates, the Company or its
Subsidiaries or affiliates be divested or held separate by Parent (but only if
such Business Units required to be held separate or divested do not in the
aggregate have a fair market value of more than $25,000,000 or revenues for the
most recently completed 12 months of more than $25,000,000), or that would
otherwise limit Parent's freedom of action with respect to, or its ability to
retain, the Company and its Subsidiaries or any portion thereof or any of
Parent's or its affiliates' other assets or businesses, shall not be deemed a
failure to satisfy the conditions specified in Annex I

<PAGE>

or Section 7.01(b) hereof.

         (d) Any party hereto shall promptly inform the others of any material
communication from the United States Federal Trade Commission, the Department of
Justice or any other domestic or foreign government or governmental or
multinational authority regarding any of the transactions contemplated by this
Agreement. If any party or any affiliate thereof receives a request for
additional information or documentary material from any such government or
authority with respect to the transactions contemplated by this Agreement, then
such party will endeavor in good faith to make, or cause to be made, as soon as
reasonably practicable and after consultation with the other party, an
appropriate response in compliance with such request. Parent will advise the
Company promptly in respect of any understandings, undertakings or agreements
(oral or written) which Parent proposes to make or enter into with the Federal
Trade Commission, the Department of Justice, or any other domestic or foreign
government or governmental or multinational authority in connection with the
transactions contemplated by this Agreement.

         SECTION 6.05 Public Announcements. Prior to the Closing, except as
required by applicable law or by any rule or regulation of the New York Stock
Exchange, no party hereto shall issue any press release or otherwise make any
public statement with respect to this Agreement and the transactions
contemplated hereby without the prior written consent of the other parties
hereto. With respect to any public statement of either party that does not
require the consent of the other party, the party making such statement shall,
prior to public disclosure thereof, first consult with and provide the other
party a reasonable opportunity to review the contents of such statement.

         SECTION 6.06 Employee Benefit Arrangements. Parent shall cause the
Company to honor all accrued obligations as of the date hereof under the
employee arrangements (the "Employee Arrangements") to which the Company or any
of its Subsidiaries is presently a party which are listed in the Employee
Arrangements Schedule and the Developments Schedule in accordance with the terms
and conditions of such arrangements. In addition, from and after the Closing
until the first anniversary of the Closing, subject to the remaining provisions
of this Section 6.06, the Surviving Corporation shall not amend, modify, alter
or terminate any severance or change of control agreements, policies or
practices of the Company or its Subsidiaries, including the SBS Plan; provided
that any such action after the first anniversary of the Closing shall not
adversely affect the accrued or vested rights of any employees or other
beneficiaries which shall have arisen under any severance or change of control
agreements, policies or practices of the Company or its Subsidiaries, including
the SBS Plan prior to such amendment, modification, alteration or termination.
Parent shall cause the Company for a period of one year following the Effective
Time, to continue to provide to employees of the Company and its Subsidiaries
who are employed by the Surviving Corporation (excluding employees covered by
collective bargaining agreements) broad-based employee benefit plans and
Employee Arrangements which are in the aggregate no less favorable than those
provided to such 

<PAGE>

employees as of the date hereof provided that it is understood that the
Surviving Corporation may alter, amend, modify and/or terminate specific benefit
plans and/or arrangements (including Employee Arrangements) subject to the
aggregate limitations set forth above. Subject to the foregoing, nothing in this
Section shall be deemed to limit or otherwise affect the right of the Surviving
Corporation to terminate employment or change the place of work,
responsibilities, status or designation of any employee or group of employees as
the Surviving Corporation may determine in the exercise of its business judgment
and in compliance with applicable laws. Solely for purposes of eligibility and
vesting under Employee Arrangements (including without limitation plans or
programs of Parent and its affiliates after the Effective Time), and to the
extent permitted by law, all service with the Company or any of its Subsidiaries
or their predecessors prior to the Effective Time shall be treated as service
with Parent and its affiliates (to the extent such service was recognized by the
Company or any of its Subsidiaries for similar purposes under comparable plans
before the Effective Time).


         SECTION 6.07 Indemnification.

         (a) Parent agrees that all rights to indemnification now existing in
favor of any director or officer of the Company and its Subsidiaries (the
"Indemnified Parties") as provided in their respective charters or by-laws or,
in an agreement between an Indemnified Party and the Company or one of its
Subsidiaries, shall survive the Merger and shall continue in full force and
effect for a period of not less than six years from the Effective Time; provided
that in the event any claim or claims are asserted or made within such six-year
period, all rights to indemnification in respect of any such claim or claims
shall continue until final disposition of any and all such claims. Parent agrees
to cause the Surviving Corporation to honor all rights to indemnification
referred to in the preceding sentence. Without limitation of the foregoing, in
the event any such Indemnified Party is or becomes involved in any capacity in
any action, proceeding or investigation in connection with any matter,
including, without limitation, the transactions contemplated by this Agreement,
occurring prior to, and including, the Effective Time, Parent will cause to be
paid in accordance with the applicable charters, by-laws and agreements, as
incurred such Indemnified Party's legal and other expenses (including the cost
of any investigation and preparation) incurred in connection therewith. The
Surviving Corporation shall pay all reasonable expenses, including attorneys'
fees, that may be incurred by any Indemnified Party in enforcing the indemnity
and other obligations provided for in this Section 6.07 subject to the
limitations of the GCL to the extent applicable.

         (b) Parent agrees that the Company, and from and after the Effective
Time, the Surviving Corporation shall cause to be maintained in effect for not
less than six years from the Effective Time for the benefit of all current and
former directors and officers of the Company the current policies of the
directors' and officers' liability insurance maintained by the Company; provided
that the Surviving Corporation may substitute therefor other policies not less
advantageous (other than to a de minimus extent) to the beneficiaries of the
current policies and provided that such substitution shall not result in any
gaps or lapses in coverage with respect to matters occurring prior to the
Effective Time; and provided, further, that the Surviving Corporation shall not
be required to pay an annual premium in excess of 300% of the last annual


<PAGE>

premium paid by the Company prior to the date hereof which is set forth in the
Insurance Schedule and if the Surviving Corporation is unable to obtain the
insurance required by this Section 6.07(b) it shall obtain as much comparable
insurance as possible for an annual premium equal to such maximum amount.

         SECTION 6.08 Notification of Certain Matters. Parent and the Company
shall promptly notify each other of (a) (i) it becoming aware of any fact or
event which would be reasonably likely to demonstrate that any representation or
warranty of any party hereto contained in this Agreement was or is untrue or
inaccurate in any material respect as of the date of this Agreement or (ii) the
occurrence or non-occurrence of any fact or event which would be reasonably
likely to cause any material covenant, condition or agreement of any party
hereto under this Agreement not to be complied with or satisfied in all material
respects and (b) any failure of any party hereto to comply with or satisfy any
covenant, condition or agreement to be complied with or satisfied by it
hereunder in any material respect; provided, however, that no such notification
shall affect the representations or warranties of any party or the conditions to
the obligations of any party hereunder.


         SECTION 6.09 No Solicitation; Termination Right.

         (a) The Company agrees that, during the term of this Agreement it shall
not, and shall not authorize, support or encourage any of its Subsidiaries or
any of its or its Subsidiaries' directors, officers, employees, agents or
representatives, directly or indirectly, to solicit, initiate, encourage,
facilitate or furnish or disclose non-public information in furtherance of, any
inquiries or the making of any proposal with respect to any recapitalization,
merger, consolidation or other business combination involving the Company, or
acquisition of any capital stock (other than upon exercise of the Options which
are outstanding as of the date hereof) or any portion of the assets (except for
acquisition of assets in the ordinary course of business consistent with past
practice) of the Company and its Subsidiaries, or any combination of the
foregoing (a "Competing Transaction"), or negotiate, or otherwise engage in
discussions with any person (other than Parent, the Purchaser or their
respective directors, officers, employees, agents and representatives) for the
purpose of facilitating any Competing Transaction or enter into any agreement,
arrangement or understanding requiring it to abandon, terminate or fail to
consummate the Merger or any other transactions contemplated by this Agreement;
provided that the Company shall use its reasonable best efforts to ensure that
none of its Subsidiaries and none of its or its Subsidiaries' directors,
officers, employees, agents or representatives, directly or indirectly,
undertakes any such actions, and, if the Board learns of any such action, the
Company shall take reasonable steps to cause the party undertaking such action
to cease such action immediately or shall immediately terminate the Company's
and/or any Subsidiary's employment or other relationship with any such director,
officer, employee, agent or representative that breaches this Section 6.09;
provided further that prior to the purchase of the Common Shares by the
Purchaser pursuant to the Offer, the Company may furnish information to, and
negotiate or otherwise engage in discussions with, any party who makes a bona
fide proposal regarding a Competing Transaction which was not solicited by the
Company after the date of this Agreement and which does not violate any
Standstill Agreement if and so long as the 

<PAGE>

Board after consultation with its counsel determines in good faith that failing
to consider and cooperate with such other party regarding such Competing
Transaction would constitute a breach of the fiduciary duties of the Board to
the Company's stockholders under applicable law, and, provided further, that in
no event does the term "Competing Transaction" include a sale or other
disposition of any of the assets specified on the Non-Coal Asset Schedule or
that is otherwise specifically permitted hereunder. The Company shall and shall
use its reasonable best efforts to cause its Subsidiaries, directors, officers,
employees, agents and representatives immediately to cease all existing
activities, discussions and negotiations with any parties conducted heretofore
with respect to any Competing Transaction. The Company agrees that neither the
Board of Directors nor any committee thereof will, during the period referenced
in the first sentence of this subsection (a), (A) withdraw or modify, or propose
publicly to withdraw or modify, in a manner adverse to Parent or the Purchase,
the Board Recommendation, or (B) approve or recommend, or propose publicly to
approve or recommend, any Competing Transaction. The foregoing notwithstanding,
in the event that prior to the purchase of Common Shares by the Purchaser
pursuant to the Offer the Board of Directors after consultation with its counsel
determines in good faith that failure to do so will result in breach of the
fiduciary duties of the Board to the Company's stockholders under applicable
law, the Board of Directors may (subject to this and the following sentences)
withdraw or modify the Board Recommendation, provided that it gives Parent three
days' prior written notice of its intention to do so. Any such withdrawal or
modification of the Board Recommendation shall not change the approval of the
Board of Directors for purposes of causing any state takeover statute or other
state law to be inapplicable to the transactions contemplated hereby, including
the Offer, the Merger or the Tender Commitments. The Company shall immediately
advise Parent in writing of the receipt, directly or indirectly, of any
inquiries, discussions, negotiations, or proposals relating to a Competing
Transaction, which becomes known to the Board during the term of this Agreement.
The Company shall keep Parent fully apprised of the status and terms of any
proposal relating to a Competing Transaction on a current basis.

         (b) If, prior to the purchase of Common Shares by the Purchaser
pursuant to the Offer, the Board after consultation with its financial and legal
advisors determines in good faith that any written proposal from a third party
for a Competing Transaction received after the date hereof that was not
solicited by the Company or any of its Subsidiaries or affiliates in violation
of this Agreement (and that does not violate or breach any Standstill Agreement
executed by such party with respect to the Company prior to the date of this
Agreement) is more favorable to the stockholders of the Company from a financial
point of view than the transactions contemplated by this Agreement (including
any adjustment to the terms and conditions of such transaction proposed in
writing by the Company in response to such Competing Transaction) and is in the
best interest of the stockholders of the Company, the Company may terminate this
Agreement at any time prior to the Offer Purchase Closing and enter into a
letter of intent, agreement-in-principle, acquisition agreement or other similar
agreement (each, an "Acquisition Agreement") with respect to such Competing
Transaction provided that, the Company provides written notice of such
termination to Parent at least three full business days prior to the


<PAGE>

effectiveness of such termination and, the Company delivers to Parent within
five business days following such termination (A) by check or wire transfer of
same day funds, (i) an amount equal to Parent's Costs (as defined in Section
8.02) as the same may have been estimated by Parent in good faith prior to the
date of such delivery (subject to an adjustment payment between the parties upon
Parent's definitive determination of such costs), but in any event not to exceed
$10,000,000, and (ii) the amount of the Termination Fee as provided in Section
8.02 and (B) a written acknowledgment from the Company and the other party to
the Competing Transaction that the Company and such other party have irrevocably
waived any right to contest such payments.

         SECTION 6.10 Cooperation for Financing. The Company agrees that, during
the term of this Agreement, it shall provide reasonable cooperation to the
Purchaser to facilitate the Purchaser's efforts to obtain the financing
contemplated by the Commitment Letters (including assisting the Purchaser in
obtaining required consents) and provide all information reasonably requested by
the Purchaser in connection with the Purchaser's efforts to satisfy the Offer
Financing Condition.

         SECTION 6.11 Tender Commitments. The Company shall cause each of the
Stockholders to execute a Tender Commitment. The Company shall not permit the
amendment, modification, release under or otherwise lessen the obligations of
the Stockholders under the Tender Commitments. The Company agrees to enforce
fully and promptly all provisions of the Tender Commitments, including, without
limitation, seeking specific performance of (or other equitable and legal
remedies with respect to) each Stockholder's obligations under its Tender
Commitment.


                                   ARTICLE VII

                    CONDITIONS TO CONSUMMATION OF THE MERGER

         SECTION 7.01 Conditions. The respective obligations of Parent, the
Purchaser and the Company to consummate the Merger are subject to the
satisfaction, at or before the Effective Time, of each of the following
conditions:

         (a) Purchase of Common Shares. The Purchaser shall have accepted for
payment and paid for Common Shares pursuant to the Offer in accordance with the
terms hereof; provided that this condition shall be deemed to have been
satisfied with respect to Parent and the Purchaser if the Purchaser fails to
accept for payment or pay for Common Shares pursuant to the Offer in violation
of the terms of the Offer.

         (b) No Injunctions or Restraints; Illegality. No (i) order or
preliminary or permanent injunction shall be entered in any action or proceeding
before any court of competent jurisdiction or any statute, rule, regulation,
legislation, or order shall be enacted, entered, enforced, promulgated, amended
or issued by any United States legislative body, court, government or
governmental, administrative or regulatory authority or agency (other than the
waiting period provisions of the HSR Act) which shall remain in effect and which
shall have the 

<PAGE>

effect of (x) making illegal or restraining or prohibiting the making of the
Offer, the acceptance for payment of, or payment for, the Common Shares by
Parent, the Purchaser or any other affiliate of Parent, or the consummation of
the Offer or the Merger or (y) imposing material limitations on the ability of
the Purchaser effectively to acquire or hold or exercise full rights of
ownership of the Common Shares, including, without limitation, the right to vote
the Common Shares purchased by the Purchaser on all matters properly presented
to the stockholders of the Company; provided, that Parent, to the extent
provided in this Agreement, shall, if necessary to prevent the taking of such
action, or the enactment, enforcement, promulgation, amendment, issuance or
application of any statute, rule, regulation, legislation, judgment, order or
injunction, offer to accept an order to divest such of the Company's or Parent's
assets and businesses as may be necessary to forestall such injunction or order
and to hold separate such assets and business pending such divestiture; (ii)
proceeding brought by an administrative agency or commission or other domestic
Governmental Entity seeking any of the foregoing shall be pending; or (iii)
action or proceeding shall be commenced following the date of this Agreement and
be pending before any court of competent jurisdiction which would have a
Material Adverse Effect on the Company.

                                  ARTICLE VIII

                         TERMINATION; AMENDMENTS; WAIVER

         SECTION 8.01 Termination. This Agreement may be terminated and the
Merger contemplated hereby may be abandoned at any time prior to the Effective
Time, notwithstanding approval thereof by the stockholders of the Company (with
any termination by Parent also being an effective termination by the Purchaser):


         (a) By the mutual written consent of Parent and the Company;

         (b) By the Company if (i) the Purchaser fails to commence the Offer as
provided in Section 1.01 hereof or, (ii) the Purchaser fails to purchase validly
tendered Common Shares in violation of the terms of the Offer or this Agreement;

         (c) By Parent or the Company if the Offer is terminated or withdrawn
pursuant to its terms without any Common Shares being purchased thereunder;
provided, however, that neither Parent nor the Company may terminate this
Agreement pursuant to this Section 8.01(c) if such party shall have materially
breached this Agreement or, in the case of Parent, if it or the Purchaser is in
material violation of the terms of the Offer.

         (d) By Parent or the Company if any court or other Governmental Entity
shall have issued, enacted, entered, promulgated or enforced any order,
judgment, decree, injunction, or ruling or taken any other action restraining,
enjoining or otherwise prohibiting the Merger and such order, judgment, decree,
injunction, ruling or other action shall have become final and nonappealable;
provided that the party seeking to terminate the Agreement shall have used its

<PAGE>

reasonable efforts to remove or lift such order, decree or ruling;

         (e) By Parent or the Company if the Offer Financing Conditions shall be
impossible to satisfy by the end of the twentieth (20th) business day following
commencement of the Offer and by the Parent or the Company if any other
condition set forth in Annex I attached hereto shall be impossible to satisfy by
the end of the thirtieth (30th) business day following commencement of the Offer
unless such circumstance results from the failure of the terminating party to
perform in any material respect its obligations under this Agreement, provided,
however, that the Company may not terminate this Agreement pursuant to this
Section 8.01(e) if Parent waives in writing the relevant condition (other than
the Minimum Condition as defined in Annex I, which cannot be waived);

         (f) By Parent if prior to the Offer Purchase Closing the Board shall
have withdrawn or modified in a manner adverse to Parent, or refrained from
making the Board Recommendation, or shall have publicly disclosed its intention
to change such recommendation, or shall have failed to reaffirm the Board
Recommendation within five (5) days of receipt from Parent or the Purchaser of a
request to so reaffirm the Board Recommendation, in each case except due to
Parent or Purchaser's material breach of this Agreement or material violation of
the terms of the Offer;

         (g) By the Company, pursuant to and in accordance with Section 6.09(b);

         (h) By the Company in the event of any breach of the covenants and/or
representations and warranties of Parent and Purchaser contained in this
Agreement which has a material adverse effect on the consummation of the
transactions contemplated by this Agreement; or

         (i) By Parent, if any Stockholder who holds more than five percent of
the Shares shall have breached any of his, her or its obligations under the
Tender Commitment.

         SECTION 8.02 Effect of Termination; Fees and Expenses.

         (a) In the event of the termination of this Agreement pursuant to
Section 8.01, this Agreement shall forthwith become void and have no effect,
without any liability on the part of any party or its directors, officers or
stockholders, other than the provisions of this Section 8.02 and the
confidentiality provisions referenced in the first sentence of Section 6.02,
which shall survive any such termination. Nothing contained in this Section 8.02
shall relieve any party from liability for any breach of this Agreement or the
Confidentiality Agreement, and provided, further, however, that if it shall be
judicially determined that termination of this Agreement was caused by an
intentional breach of this Agreement, then, in addition to other remedies at law
or equity for breach of this Agreement, the party so found to have intentionally
breached this Agreement shall indemnify and hold harmless the other parties for
their respective costs, fees and expenses of their counsel, accountants,
financial advisors and other experts and advisors as well as fees and expenses
incident to negotiation, preparation and execution of this Agreement and the
transactions contemplated hereby ("Costs"). If this Agreement is terminated
pursuant to Section

<PAGE>

8.01(f) or (g), the Company will within five business days following any such
termination pay to Parent in cash by wire transfer in immediately available
funds to an account designated by Parent (i) in reimbursement for Parent's
expenses an amount equal to the aggregate amount of Parent's reasonable
documented Costs incurred in connection with pursuing the transactions
contemplated by this Agreement, including, without limitation, legal, accounting
and investment banking fees, up to but not in excess of $10,000,000 in the
aggregate and (ii) a payment in an amount equal to $18,000,000 (the "Termination
Fee"). Purchaser shall terminate the Offer as soon as practicable following
termination of this Agreement for any reason.

         (b) The prevailing party in any legal action undertaken to enforce this
Agreement or any provision hereof shall be entitled to recover from the other
party the costs and expenses (including attorneys' and expert witness fees)
incurred in connection with such action.

         SECTION 8.03 Amendment. Subject to Section 1.03(c), this Agreement and
the Offer may be amended by the Company, Parent and the Purchaser at any time
before or after any approval of this Agreement by the stockholders of the
Company but, after any the purchase of shares pursuant to the Offer, no
amendment shall be made which decreases the Merger Consideration or which
materially adversely affects the rights of the Company's stockholders hereunder
without the approval of such stockholders. This Agreement and the Offer may not
be amended except by an instrument in writing signed on behalf of all the
parties.

         SECTION 8.04 Extension; Waiver. Subject to Section 1.03(c), at any time
prior to the Effective Time, the parties hereto may (i) extend the time for the
performance of any of the obligations or other acts of any other party hereto,
(ii) waive any inaccuracies in the representations and warranties contained
herein by any other party or in any document, certificate or writing delivered
pursuant hereto by any other party or (iii) waive compliance with any of the
agreements of any other party or with any conditions to its own obligations. Any
agreement on the part of any party to any such extension or waiver shall be
valid only if set forth in an instrument in writing signed on behalf of such
party.

                                   ARTICLE IX

                                  MISCELLANEOUS

         SECTION 9.01 Non-Survival of Representations and Warranties. The
representations and warranties made in this Agreement shall not survive beyond
the Effective Time. Notwithstanding the foregoing, the agreements set forth in
Section 3.02, the last sentence of Section 6.02, Section 6.06 and Section 6.07
shall survive the Effective Time indefinitely (except to the extent a shorter
period of time is explicitly specified therein).

         SECTION 9.02 Entire Agreement; Assignment.

         (a) This Agreement (including the documents and the instruments
referred to 

<PAGE>

herein) and the letter agreement dated March 6, 1998 between Credit Suisse First
Boston Corporation and Addington Enterprises Inc. (the "Confidentiality
Agreement"), constitute the entire agreement and supersede all prior agreements
and understandings, both written and oral, among the parties with respect to the
subject matter hereof and thereof.

         (b) Neither this Agreement nor any of the rights, interests or
obligations hereunder will be assigned by any of the parties hereto (whether by
operation of law or otherwise) without the prior written consent of the other
party; provided however that after the Effective Time Parent and/or the
Purchaser may, without the consent of the Company, (i) assign their rights under
this Agreement to any of their respective Affiliates, or (ii) collaterally
assign their rights under this Agreement to the lender of Parent or the
Purchaser. Subject to the preceding sentence, this Agreement will be binding
upon, inure to the benefit of and be enforceable by the parties and their
respective successors and assigns.

         SECTION 9.03 Validity. The invalidity or unenforceability of any
provision of this Agreement shall not affect the validity or enforceability of
any other provision of this Agreement, each of which shall remain in full force
and effect.

         SECTION 9.04 Notices. All notices, requests, claims, demands and other
communications hereunder shall be in writing and shall be deemed to have been
duly given when delivered in person, by overnight courier or facsimile to the
respective parties as follows:

                  If to Parent or the Purchaser:

                  AEI Resources, Inc.
                  1500 North Big Run Road
                  Ashland, Kentucky 41102
                  Attention:    Corporate Secretary
                  Telecopy:     (606) 928-0450

                  With a copy to:

                  Brown, Todd & Heyburn PLLC
                  27000 Lexington Financial Center
                  250 West Main Street
                  Lexington, KY 40507-1749
                  Attention:    Paul Sullivan
                  Telecopy:     (606) 231-0011

                  If to the Company:

                  Zeigler Coal Holding Company
                  50 Jerome lane
                  Fairview Heights, IL  62208
                  Attention:    Brent L. Motchan, Esq.

<PAGE>

                  Fax:          618-394-2518
                  Phone:   618-394-2406

                  with a copy to:

                  Kirkland & Ellis
                  Citicorp Center
                  153 East 53rd Street
                  New York, NY  10022-4675
                  Attention:    Glen E. Hess, P.C.
                  Fax:          212-446-4900
                  Phone:   212-446-4808

or to such other address as the person to whom notice is given may have
previously furnished to the other in writing in the manner set forth above
(provided that notice of any change of address shall be effective only upon
receipt thereof).

         SECTION 9.05 Governing Law. This Agreement shall be governed by and
construed in accordance with the laws of the State of Delaware, regardless of
the laws that might otherwise govern under applicable principles of conflicts of
laws thereof or otherwise.

         SECTION 9.06 Descriptive Headings. The descriptive headings herein are
inserted for convenience of reference only and are not intended to be part of or
to affect the meaning or interpretation of this Agreement.

         SECTION 9.07 Counterparts. This Agreement may be executed in two or
more counterparts, each of which shall be deemed to be an original, but all of
which shall constitute one and the same agreement.

         SECTION 9.08 Parties in Interest. This Agreement shall be binding upon
and inure solely to the benefit of each party hereto, and, except with respect
to Sections 2.03(d), 3.01, 3.02 and 6.07 nothing in this Agreement, express or
implied, is intended to confer upon any other person any rights or remedies of
any nature whatsoever under or by reason of this Agreement.

         SECTION 9.09 Specific Performance. The parties hereto agree that
irreparable damage would occur in the event that any of the provisions of this
Agreement were not performed in accordance with their specific terms or were
otherwise breached. It is accordingly agreed that the parties shall be entitled
to an injunction or injunctions to prevent breaches of this Agreement and to
enforce specifically the terms and provisions hereof in any court of the United
States or any state having jurisdiction, this being in addition to any other
remedy to which they are entitled at law or in equity.

                                    ARTICLE X
<PAGE>

                                   DEFINITIONS

         SECTION 10.01 Certain Definitions. As used in this Agreement:

         "Active Operating Properties and Reserves" means all property included
in mining permits currently issued to the Company or any of its Subsidiaries or
which will be issued prior to the Closing.

         "Acquisition Agreement" has the meaning given thereto in Section
6.09(b) hereof.

         "Affiliate", as applied to any person, shall mean any other person
directly or indirectly controlling, controlled by, or under common control with,
that person. For the purposes of this definition, "control" (including, with
correlative meanings, the terms "controlling," "controlled by" and "under common
control with"), as applied to any person, means the possession, directly or
indirectly, of the power to direct or cause the direction of the management and
policies of that person, whether through the ownership of voting securities, by
contract or otherwise.

         "Agreement" has the meaning given thereto in the preamble hereof.

         "Antitrust Laws" has the meaning given thereto in Section 6.04(b)
hereof.

         "Board" has the meaning given thereto in the recitals hereof.

         "Board Recommendation" has the meaning given thereto in Section 1.02(a)
hereof.

         "Certificates" has the meaning given thereto in Section 3.02 hereof.

         "Closing" has the meaning given thereto in Section 2.02 hereof.

         "Closing Date" has the meaning given thereto in Section 2.02 hereof.

         "Code" has the meaning given thereto in Section 4.17(a) hereof.

         "Commitment Letter" has the meaning given thereto in Section 5.05
hereof.

         "Common Share" and "Common Shares" have the meaning given thereto in
the recitals hereof.

         "Company" has the meaning given thereto in the first paragraph hereof.

         "Company's Knowledge" and words of similar import shall mean actual
knowledge of a particular fact being known by any of (i) the current serving
directors of the 

<PAGE>

Company, (ii) or any of the following officers of the Company: Chand B. Vyas,
Douglas Blackburn, Frank Barkofske and Brent Motchan, (iii) with respect to
labor and employment matters, David Young; (iv) with respect to information
concerning any Subsidiary, division or business unit of the Company, the
president or most senior executive of such Subsidiary, and (v) any person
succeeding to the position currently of any of the persons indicated in clauses
(ii), (iii) and (iv) above.

         "Company Representatives" has the meaning given thereto in Section 6.02
hereof.

         "Competing Transaction" has the meaning given thereto in Section
6.09(a) hereof.

         "Confidentiality Agreement" has the meaning given thereto in Section
9.02(a) hereof.

         "Consent" has the meaning given thereto in Section 4.05(b) hereof.

         "Costs" has the meaning given thereto in Section 8.02 hereof.

         "CSFB" has the meaning given thereto in Section 1.02(a) hereof.

         "December Balance Sheet" has the meaning given thereto in Section
4.06(b) hereof.

         "Disclosure Schedules" shall mean all of the separate schedules
referred to in Article IV and all Supplemental Schedules taken together.

         "Dissenting Shares" has the meaning given thereto in Section 3.01
hereof.

         "Effective Time" has the meaning given thereto in Section 2.02 hereof.

         "Employee Arrangements" has the meaning given thereto in Section 6.06
hereof.

         "Environmental Mining and Safety Requirements" means all federal, state
and local statutes, regulations, notices of violations, abatement orders,
closure orders, ordinances, permits, judicial and administrative orders and
determinations, and similar provisions having the force and effect of law, and
all common law concerning public health and safety, worker health and safety,
mine health or safety, surface and underground mining, mineral processing or
transport, mine reclamation, pollution or protection of the environment,
including without limitation all those relating to the presence, use,
production, generation, handling, transport, treatment, storage, disposal,
distribution, release, runoff, containment, control, or cleanup of any Hazardous
Substances, Oils, Pollutants or Contaminants (as such terms as defined in the
National Oil and Hazardous Substances Pollution Contingency Plan, 40 C.F.R.
300.5), and any mining wastes or byproducts as the foregoing are enacted and in
effect on or prior to the date hereof.

<PAGE>

         "ERISA" has the meaning given thereto in Section 4.17(a) hereof.

         "Exchange Act" has the meaning given thereto in Section 4.05 (b)
hereof.

         "Expiration Date" has the meaning given thereto in Section 1.01.

         "GAAP" has the meaning given thereto in Section 4.06(b) hereof.

         "GCL" has the same meaning given thereto in the recitals hereof.

         "Government Entity" has the meaning given thereto in Section 4.05(b)
hereof.

         "HSR Act" has the meaning given thereto in Section 4.05(b) hereof.

         "Indemnified Parties" has the meaning given thereto in Section 6.07(a)
hereof.

         "Information Memorandum" means that certain Offering Memorandum, dated
February, 1998, prepared by CSFB regarding the Company and its Subsidiaries.

         "Intellectual Property" has the meaning given thereto in Section 4.13
hereof.

         "Joint Development Agreement" has the meaning given thereto in Section
6.01(j).

         "June Balance Sheet" has the meaning given thereto in Section 4.06(b).

         "Liens" means liens, security interests, options, rights of first
refusal, easements, mortgages, charges, pledges, deeds of trust, rights-of-way,
restrictions, encroachments, licenses, leases, permits, security agreements, or
any other encumbrances, restrictions or limitations on the use of real or
personal property, whether or not they constitute specific or floating charges.

         "March Balance Sheet" has the meaning given thereto in Section 4.06(b).

         "Material Adverse Effect on the Company" has the meaning given thereto
in Section 4.01 hereof.

         "Material Contract" has the meaning given thereto in Section 4.12(a).

         "Merger" has the meaning given thereto in the recitals hereof.

         "Merger Consideration" has the meaning given thereto in Section 2.05
hereof.

         "Mining Permits" has the meaning given thereto in Section 4.14 hereof.

         "Multiemployer Plan" has the meaning given thereto in Section 4.17(f)
hereof.

         "Non-Mining Assets" means the operations and business of the Company
and its Subsidiaries and any assets related thereto that are described on the
Non-Mining Assets Schedule 



<PAGE>

attached hereto.

         "Offer" has the meaning given thereto in the recitals hereof.

         "Offer Documents" has the meaning given thereto in Section 1.01(a)
hereof.

         "Offer Price" has the meaning given thereto in the recitals hereof.

         "Offer Purchase Closing" has the meaning given thereto in Section
1.01(a) hereof.

         "Offer to Purchase" has the meaning given thereto in Section 1.01(a)
hereof.

         "Operating Facilities" means any real property rights owned, leased or
otherwise controlled by the Company or any of its subsidiaries where the Company
or any of its Subsidiaries has facilities currently used in the coal mining
business including office and administrative buildings, mine openings, air
shafts, preparation and processing plants, slurries and gob disposal areas,
retention and drainage ponds, unfinished reclamation areas, coal terminals, and
coal loading and storage facilities..

         "Option" has the meaning given thereto in Section 1.04 hereof.

         "Option Plan" has the meaning given thereto in Section 1.04 hereof.

         "Other Filings" has the meaning given thereto in Section 4.07 hereof.

         "Other Real Property" means any real property rights owned, leased or
otherwise controlled by the Company or any of its Subsidiaries other than
"Active Operating Properties and Reserves" and "Operating Facilities."

         "Parent" has the meaning given thereto in the first paragraph hereof.


         "Parent Representatives" has the meaning given thereto in Section 6.02
hereof.

         "Paying Agent" has the meaning given thereto in Section 3.02 hereof.

         "Pension Plan" has the meaning given thereto in Section 4.17(a) hereof.

         "Permitted Encumbrances" has the meaning given thereto in Section 4.09
hereof.

         "Person" or "person" shall include individuals, corporations,
partnerships, trusts, other entities and groups (which term shall include a
"group" as such term is defined in Section 13(d)(3) of the Exchange Act ).

         "Permits" has the meaning given thereto in Section 4.15 hereof.
<PAGE>

         "Plans" has the meaning given thereto in Section 4.17(a) hereof.

         "Proxy Statement" has the meaning given thereto in Section 2.08 (a)(ii)
hereof.

         "Purchaser" has the meaning given thereto in the first paragraph
hereof.

         "Release" has the meaning given thereto in Section 4.20(d) hereof.

         "SBS Plan" has the meaning given thereto in Section 1.04.

         "Schedule 14D-9" has the meaning given thereto in Section 1.02(a).

         "SEC" has the meaning given thereto in Section 1.01 hereof.

         "SEC Reports" has the meaning given thereto in Section 4.06(a) hereof.

         "SMCRA" has the meaning given thereto in Section 3.24 hereof.

         "Special Meeting" has the meaning given thereto in Section 2.08(a)(I)
hereof.

         "Standstill Agreement" has the meaning given thereto to in Section
6.01(k).

         "Stockholder" means each or any of Kinman Limited Partnership, Michael
K. Reilly, Chand B. Vyas, Roland E. Casati and John F. Manley, and such persons
collectively are referred to as the "Stockholders."

         "Subsidiary" or Subsidiaries" has the meaning given thereto in Section
4.01 hereof.

         "Surviving Corporation" has the meaning given thereto in Section 2.01
hereof.

         "Taxes" mean any federal, state, local, or foreign income, gross
receipts, license, payroll, employment, excise, severance, stamp, occupation,
premium, windfall profits, environmental (including taxes under Code ss. 59A),
customs duties, capital stock, franchise, profits, withholding, social security
(or similar), unemployment, disability, real property, personal property, sales,
use, transfer, registration, value added, alternative or add-on minimum,
estimated, or other tax of any kind whatsoever, including any interest penalty,
or addition thereto, whether disputed or not.

         "Tax Returns" means any return, declaration, report, estimate, claim
for refund, or information return or statement relating to Taxes, including any
schedule or attachment thereto, and including any amendment thereof.

         "Tender Commitment" means each of those certain Support Agreements,
dated the date hereof, by and between the Company and each of the Stockholders,
and such agreements collectively are referred to as the "Tender Commitments."

<PAGE>

         "Violation" has the meaning given thereto in Section 4.05(a) hereof.

         "Welfare Plans" has the meaning given thereto in Section 4.17(a)
hereof.

                                     * * * *

<PAGE>



         IN WITNESS WHEREOF, each of the parties has caused this Agreement to be
executed on its behalf by its respective officer thereunto duly authorized, all
as of the day and year first above written.


                                       AEI RESOURCES, INC.


                                       By: /s/ Donald P. Brown
                                          ----------------------------------
                                           Name: Donald P. Brown
                                           Title: President


                                       ZEIGLER ACQUISITION CORPORATION


                                       By: /s/ Donald P. Brown
                                          ----------------------------------
                                           Name: Donald P. Brown
                                           Title: President


                                       ZEIGLER COAL HOLDING COMPANY


                                       By: /s/ Chand B. Vyas
                                          ----------------------------------
                                           Name: Chand B. Vyas
                                           Title: President and Chief 
                                                  Executive Officer



<PAGE>



                                                                         ANNEX I
                                                                         -------

         Conditions to the Offer. Notwithstanding any other provisions of the
Offer, the Purchaser shall not be required to accept for payment or pay for any
tendered Common Shares, unless (I) there are validly tendered and not properly
withdrawn prior to the Expiration Date that number of Common Shares which
represent at least 90% of the total number of outstanding Common Shares on a
fully diluted basis (excluding options tendered for cancellation under Section
1.04) on the date of purchase (the "Minimum Condition"), and (ii) the Purchaser
shall have obtained, as contemplated by the Commitment Letters, on terms that
are not less favorable to Parent and the Purchaser (or from such alternative
financing sources on terms and conditions that are not less favorable to Parent
and the Purchaser than those contemplated by the Commitment Letters), the funds
necessary for the consummation of the transactions contemplated by the Merger
Agreement, including the purchase of all of the Common Shares tendered in the
Offer, payment of the Merger Consideration with respect to all Common Shares,
all payments with respect to Options and all related costs and expenses (the
"Offer Financing Condition"). Furthermore, notwithstanding any other provisions
of the Offer, the Purchaser shall not be required to accept for payment and may,
subject to the terms of the Merger Agreement, amend the Offer, postpone the
acceptance for payment of or payment for tendered Common Shares or terminate the
Offer and not accept for payment any Common Shares if at any time on or after
the date of the Merger Agreement (unless otherwise indicated below) and before
the time of payment for any Common Shares, any of the following events (each, an
"Event") shall occur:

                  (a) (i) The waiting period applicable to the Offer or the
         Merger pursuant to the provisions of the HSR Act and any applicable
         foreign or supranational Antitrust Laws shall fail to have expired or
         to have been terminated; or (ii) action by the Department of Justice or
         Federal Trade Commission or any foreign or supranational agency or
         entity charged with enforcement of Antitrust Laws that are applicable
         to the transactions contemplated hereby challenging or seeking to
         enjoin the consummation of the Offer or the Merger shall have been
         instituted and be pending; or

                  (b) (i) Any order or preliminary or permanent injunction shall
         be entered in any action or proceeding before any court of competent
         jurisdiction or any statute, rule, regulation, legislation, or order
         shall be enacted, entered, enforced, promulgated, amended or issued by
         any United States legislative body, court, government or governmental,
         administrative or regulatory authority or agency (other than the
         waiting period provisions of the HSR Act) which shall remain in effect
         and which shall have the effect of (x) making illegal or restraining or
         prohibiting the making of the Offer, the acceptance for payment of, or
         payment for, the Common Shares by Parent, the Purchaser or any other
         affiliate of Parent, or the consummation of the Offer or the Merger or
         (y) imposing material limitations on the ability of the Purchaser
         effectively to acquire or hold or exercise full rights of ownership of
         the Common Shares, including, without limitation, the right to vote the
         Common Shares purchased by the Purchaser on all matters properly
         presented to the stockholders of the Company; provided, that Parent, to
         the extent provided in the Merger Agreement, shall, if necessary to
         prevent the taking of such 

<PAGE>

         action, or the enactment, enforcement, promulgation, amendment,
         issuance or application of any statute, rule, regulation, legislation,
         judgment, order or injunction, offer to accept an order to divest such
         of the Company's or Parent's assets and businesses as may be necessary
         to forestall such injunction or order and to hold separate such assets
         and business pending such divestiture; (ii) any proceeding brought by
         an administrative agency or commission or other domestic Governmental
         Entity seeking any of the foregoing shall be pending; or (iii) any
         action or proceeding shall be commenced following the date of the
         Merger Agreement and be pending before any court of competent
         jurisdiction which would have a Material Adverse Effect on the Company;
         or

                  (c) The Company and the Purchaser and Parent shall have
         reached an agreement that the Offer or the Merger Agreement be
         terminated, or the Merger Agreement shall have been terminated in
         accordance with its terms; or

                  (d) The Company or any of its Subsidiaries shall have breached
         one or more of its representations and warranties set forth in the
         Merger Agreement or failed to perform any of its obligations, covenants
         or agreements under the Merger Agreement and such breaches or failures
         to perform shall in the aggregate materially and adversely affect the
         ability of Parent to own or control the Company, its equity securities
         and its assets; or

                  (e) On or after the date of the Merger Agreement, any Material
         Adverse Effect on the Company shall have occurred or be occurring; or

                  (f) The representations and warranties set forth in Section
4.03 or Section 4.25 shall not be true and correct in all material respects.

The Offer shall terminate if the Merger Agreement is terminated pursuant to its
terms. Pursuant to the Merger Agreement, Parent and Purchaser have agreed to use
their respective reasonable best efforts to obtain financing for the Offer and
to cause all other conditions to be fulfilled.

The foregoing conditions are for the benefit of Parent and the Purchaser and may
be asserted by Parent or the Purchaser regardless of the circumstances giving
rise to any such conditions and may be waived by Parent or the Purchaser in
whole or in part at any time and from time to time in their reasonable
discretion, in each case, subject to the terms of the Merger Agreement. The
failure by Parent or the Purchaser at any time to exercise any of the foregoing
rights shall not be deemed a waiver of any such right and each such Right shall
be deemed an ongoing right which may be asserted at any time and from time to
time.

The capitalized terms used in this Annex I shall have the meanings set forth in
the Agreement to which it is annexed, except that the term "Merger Agreement"
shall be deemed to refer to the Agreement to which this Annex I is appended.

<PAGE>

                                                                Exhibit 99(c)(2)


Mr. Larry Addington
Addington Enterprises, Inc.
1500 North Big Run Road
Ashland, KY  41102

March 6, 1998

Dear Mr. Addington:

You (which term shall include your subsidiaries or other entities controlled by
you) have requested information regarding Zeigler Coal Holding Company (which
term, together with its subsidiaries or other controlled entities, the
"Company", "us" or "we") in connection with your consideration of the possible
acquisition of the Company (a "Possible Transaction").  In consideration of our
furnishing you with the Evaluation Materials (as defined below) you agree as
follows:

CONFIDENTIALITY OF EVALUATION MATERIALS

You will treat confidentially any information (whether written or oral) that
either we or our financial advisor, CREDIT SUISSE FIRST BOSTON CORPORATION
("CSFB"), or our other representatives furnish to you in connection with a
Possible Transaction involving the Company, together with analyses,
compilations, studies or other documents prepared by you, or by your
representatives (as defined below)
which contain or otherwise reflect such information or your review of, or
interest in the Company (collectively, the "Evaluation Materials").  You
recognize and acknowledge the competitive value of the Evaluation Materials and
the damage that could result to the Company if the Evaluation Materials were
used or disclosed except as authorized by this Agreement.

The term "Evaluation Materials" includes information furnished to you orally or
in writing (whatever the form or storage medium) or gathered by inspection,and
regardless of whether such information is specifically identified as
"confidential."  The term "Evaluation Materials" does not include information
which (i) is or becomes generally available to the public other than as a result
of a disclosure by you or your representatives, (ii) was or becomes available to
you on a non-confidential BASIS from a source other than the Company or its
representatives, provided that such source is not prohibited from disclosing
such information to you by a contractual, legal or fiduciary obligation to the
Company or its representatives, or (iii) is independently developed by you.

USE OF EVALUATION MATERIALS

You will not use any of the Evaluation Materials for any purpose other than the
exclusive purpose of evaluating a Possible Transaction.  You and your
representatives will keep the Evaluation Materials completely confidential;
PROVIDED, HOWEVER, that (i) any of such information may only be disclosed to
those of your directors, officers, employees, agents, 


<PAGE>

representatives (including attorneys, accountants and financial advisors),
lenders and other sources of financing (collectively, "your representatives")
who need to know such information for the purpose of evaluating a Possible
Transaction between you and the Company (it being understood that your
representatives shall be informed by you of the confidential nature of such
information and shall be directed by you, and shall each expressly agree, to
treat such information confidentially in accordance with this Agreement) and
(ii) any other disclosure of such information may only be made if the Company
consents by writing prior to any such disclosure.  Without limiting the
generosity of the foregoing, in the event that a Possible Transaction is not
consummated neither you nor your representatives shall use any of the Evaluation
Materials for any purpose.  You will be responsible for any breach of this
Agreement by your representatives.

In the event that you or any of your representatives receive a request or are
required (by deposition, interrogatory, request for documents, subpoena, civil
investigative demand or similar process) to disclose all or any part of the
Evaluation Materials, you or your representatives as the case may be, agree to
(i) immediately notify the Company of the existence terms and circumstances
surrounding such a request, (ii) consult with the Company on the advisability of
taking legally available steps to resist, or narrow such request and (iii)
assist the Company in seeking a protective order or other appropriate remedy. 
In the event that such protective order or other remedy is not obtained or that
the Company waives compliance with the provisions hereof, (i) you or your
representatives, as the case may be, may disclose to any tribunal only that
portion of the Evaluation Materials which you are advised by counsel is legally
required to be disclosed, and shall exercise your best efforts to obtain
assurance that confidential treatment will be accorded such Evaluation Materials
and (ii) you shall not be liable for such disclosure unless disclosure to any
such tribunal was caused by or resulted from a previous disclosure by you or
your representatives not permitted by this Agreement.

NON-DISCLOSURES

The disclosure of your possible interest in purchasing the Company could have a
material adverse effect on the Company's business if for any reason an agreement
of purchase and sale is not consummated.  Accordingly, unless required by
applicable law, you agree that prior to the closing of a Possible Transaction,
without the prior written consent of the Company, you will not, and you will
direct your representatives not to, disclose to any person either the fact that
discussions or negotiations are taking place concerning a possible transaction
between you and the Company or any of the terms, conditions or other facts with
respect to any such Possible Transaction, including the status thereof.  The
term "person" as used in this letter shall be broadly interpreted to include,
without limitation, any corporation, the Company, governmental agency or body,
stock exchange, partnership, association or individual.


<PAGE>

RETURN OF DOCUMENTS

Upon the Company's request, you shall promptly deliver to the Company or destroy
all written Evaluation Materials and any other written materials without
retaining, in whole or in part, any copies, extracts or other reproductions
(whatever the form or storage medium) of such material, and shall certify the
destruction of such materials in writing to the Company.

NO UNAUTHORIZED CONTACT OR SOLICITATION

During the course of your evaluation, all inquiries and other communications are
to be made directly to CSFB or employees or representatives of the Company
specified by CSFB.  Accordingly, you agree not to directly or indirectly contact
or communicate with any executive or other employee of the Company concerning is
Possible Transaction, or to seek any information in connection therewith from
such person, without the express consent of CSFB.  You also agree not to discuss
with or offer to any third party an equity participation in a Possible
Transaction or any other form of joint acquisition by you and such third party
without CSFB's prior written consent.

Without the Company's prior consent, neither your or anybody acting on your
behalf shall directly or indirectly for a period of two years from the date
hereof (a) induce or encourage any employee of Zeigler to leave employment with
Zeigler or (b) employ or hire the services of any executive, managerial,
supervisory, technical, or geological employee, of Zeigler, provided that you
shall not be prohibited by clause (b) above from employing or hiring the
services of any person who has             to be an employee of Zeigler for a
period of at least 180 days prior to any direct or indirect communication of any
kind between such person and you relating to possible or actual employment of
such Person or hiring such Person's services.

STANDSTILL

You agree that until two years from the date of this Agreement, you will not
without the prior approval of the Board of Directors (I) acquire or make any
proposal to acquire any securities or property of the Company, (ii) propose to
enter into any merger or business combination involving the Company or purchase
a material portion of the assets of the Company, (iii) make or participate in
any           Of             to vote, or seek to advise or influence any person
with respect to the voting of any securities of the Company, (iv) form, join or
participate in a "group" (within the meaning of Section 13( )( ) of the
Securities Exchange Act of 1834) with respect to any voting securities of the
Company, (v) otherwise act or seek to control or influence the management Board
of Directors or policies of the Company, (vi) disclose any intention, plan or
arrangement inconsistent with the foregoing or (vii) take any action which might
require the Company to make a public announcement regarding the possibility of a
business combination or merger.  Except as provided above, you also agree during
such 


<PAGE>

period not to request the Company (or its directors, officers, employees, agents
or representatives) to amend or waive any provision of this paragraph.

NO REPRESENTATION OR WARRANTY

Although the Company and CSFB have endeavored to included in the Evaluation
Materials Information known to them which they believe to be relevant for the
purpose of your investigation, you acknowledge and agree that non of the
Company, CSFB or any of the Company's other representatives or agents is making
any representation or warranty, expressed or implied, as to the accuracy or
completeness of the Evaluation Materials, and riches of the Company, CSFB or any
of the Company's other representatives or agents, nor any of their respective
officers, directors, employees, representatives, stockholders, owners,
affiliates, advisors or agents, will have any liability to you of any other
person resulting from the use of Evaluation Materials by you or any other person
resulting from the use of Evaluation Materials by you or any of your
representatives.  Only those representatives or warranties that are made to a
purchaser in a definitive sale agreement for the Company ("Sale Agreement")
when, as, and if it is executed, and subject to such limitations and
restrictions as may be specified in such Sale Agreement, will have any legal
effect.

You also acknowledge and agree that no contract or agreement providing for the
sale of the Company shall be deemed to exist between you and the Company unless
and until a Sale Agreement has been executed and delivered by you and each of
the other parties thereof, and you hereby waive, in advance, any claims
(including, without limitation, breach of contract) in connection with the sale
of the Company unless and until a Sale Agreement has been executed and delivered
by you and each of the other parties thereto.  You also agree that unless and
until a Sale Agreement between the Company and you with respect to the
acquisition of the Company has been executed and delivered by you and each of
the other parties thereto, there shall not be any legal obligation of any kind
whatsoever with respect to any such transaction by virtue of this agreement or
any other written or oral expression with respect to such transaction except, in
the case of this Agreement, for the matters specifically agreed to herein.  For
purposes of this Agreement, the term "Sale Agreement" does not include an
executed letter of              or any other preliminary written agreement, nor
does it include any oral acceptance of an offer or bid by you.

You further understand and agree that (I) the Company and CSFB shall be free to
conduct the process for the Company's sale as they in their sole discretion
shall determine (including, without limitation, negotiating with any of the
prospective buyers and entering into a Sale Agreement without prior notice to
you or to any other person).  (ii) Any procedures relating to such sale may be
changed at any time without notice to you or any other person and (iii) you
shall not have any claims whatsoever against the Company, CSFB or any of their
respective directors, officers, employees, stockholders, owners, affiliates,
agents or representatives arising out of or relating to the sale of the Company
(either than those as against the parties to a Sale Agreement with you in
accordance with the terms thereof).


<PAGE>

LEGAL REMEDY

You understand and agree that money damages would not be a sufficient remedy for
any breach of this Agreement by you or your representatives and that the Company
will be entitled to specific performance and injunctive relief as remedies for
any such breach.  Such remedies shall not be deemed to be the exclusive remedies
for a breach of this Agreement by you or your representatives but shall be in
addition to all other remedies available at law or equity.

OTHER

This Agreement constitutes the entire agreement between the parties hereto
regarding the subject matter hereof.  This Agreement may be changed only by a
written agreement signed by the parties herein or their authorized
representatives.

This Agreement shall be governed and construed in accordance with the laws of
the State of New York, without regard to the conflicts of law principles
thereof.

If you are in agreement with the foregoing, please sign and return one copy of
this letter, it being understood that all counterpart copies will constitute but
one agreement with respect to the subject matter of this letter.

Very truly yours,

ZEIGLER GOAL HOLDING COMPANY

By CREDIT SUISSE FIRST BOSTON CORPORATION, solely as the Company's
representative

By:      Illegible
   -------------------------------------------
Name:
Title:

Accepted and agreed to as of my date hereof:

ADDINGTON ENTERPRISES INC.

By: /s/ Stephen Addington
   -------------------------------------------
Name:  Stephen Addington



<PAGE>

                              FORM OF SUPPORT AGREEMENT


    SUPPORT AGREEMENT (this "Agreement"), dated as of August 3, 1998, by and
between Zeigler Coal Holding Company, a Delaware corporation (the "Company"),
and Kinman Ltd. Partners ("Stockholder") .

    WHEREAS, concurrently herewith, the Company, Coal Ventures, Inc., a Delaware
corporation ("Parent") and Zeigler Acquisition Corporation, a Delaware
corporation and a subsidiary of Parent (the "Purchaser") are entering into an
Agreement and Plan of Merger of even date herewith (the "Merger Agreement"). 
Capitalized terms used but not defined herein have the meanings set forth in the
Merger Agreement. Pursuant to the Merger Agreement, the Purchaser has agreed to
make a tender offer on the terms and conditions set forth in the Merger
Agreement (the "Offer") for any and all outstanding shares of common stock, par
value $.01 per share (the "Shares"), of the Company, at $21.25  per share
(the "Offer Price") net to the seller in cash, to be followed by a merger (the
"Merger") of the Purchaser with and into the Company;

     WHEREAS, as of the date hereof, Stockholder is the beneficial owner of
5,801,738 Shares (the "Owned Shares"); and

     WHEREAS, in recognition of the benefits to be received by the Stockholder
in connection with and in order to facilitate and support the transactions
contemplated by the Merger Agreement and the Offer, the Stockholder and the
Company have agreed, subject to the terms and conditions of this Agreement, that
the Stockholder will, among other things, tender pursuant to the Offer the Owned
Shares, together with any Shares acquired after the date hereof and prior to the
termination of the Offer, whether upon the exercise of options, conversion of
convertible securities or otherwise (collectively with the Owned Shares, the
"Tender Shares").

     NOW, THEREFORE, in consideration of the premises and for other good and
valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties agree as follows:

     1.   Agreement to Tender.

     1.1  Tender. Stockholder hereby agrees to tender (or cause the record owner
of such shares to tender), pursuant to and in accordance with the terms of the
Offer no later than three business days prior to the Expiration Date, the Tender
Shares and to not withdraw such Tender Shares, except following termination of
this Agreement pursuant to Section 2 hereof.  Stockholder 



<PAGE>


hereby acknowledges and agrees that Purchaser's obligation to accept for payment
and pay for the Tender Shares is subject to the terms and conditions of the
Offer.  Stockholder hereby authorizes the Company to permit Parent and the
Purchaser to publish and disclose in the Offer Documents and, if approval of the
Company's stockholders is required under applicable law, the Proxy Statement
(including all documents and schedules filed with the Securities and Exchange
Commission) the Stockholder's identity and ownership of the Tender Shares and
the nature of Stockholder's commitments, arrangements and understandings under
this Agreement.

     1.2  Voting.  Stockholder hereby agrees that, during the time this
Agreement is in effect, at any meeting of the stockholders of the Company,
however called (or in any written consent in lieu thereof), Stockholder shall
not vote the Tender Shares in favor of any Competing Transaction.

     1.3  No Inconsistent Arrangements.  Stockholder hereby covenants and agrees
that, except as contemplated by this Agreement, it shall not (i) transfer (which
term shall include, without limitation, any sale, gift, pledge or other
disposition), or consent to any transfer of, any or all of the Tender Shares or
any interest therein, (ii) enter into any contract, option or other agreement or
understanding with respect to any transfer of any or all of the Tender Shares or
any interest therein, (iii) grant any proxy, power-of-attorney or other
authorization in or with respect to the Tender Shares, other than those that are
intended to facilitate or which do not impede or impair Stockholder's compliance
with the terms of this Agreement, (iv) deposit the Tender Shares into a voting
trust or enter into a voting agreement or arrangement with respect to the Tender
Shares or (v) take any other action that would in any way restrict, limit or
interfere with the performance of his obligations hereunder or the transactions
contemplated hereby or by the Merger Agreement.  Notwithstanding the foregoing,
Stockholder may distribute or otherwise transfer the Tender Shares to its
general partner and limited partners or other transferee, if applicable,
provided that each such person will take such share subject to the terms and
conditions of this Agreement and agrees so in writing at the time of transfer.

     1.4  No Solicitation.  Stockholder hereby agrees that Stockholder shall
not, and shall not permit or authorize any of his affiliates, representatives or
agents to, directly or indirectly, solicit, participate in or initiate
discussions or negotiations with, or provide or disclose any information to, any
corporation, partnership, person or other entity or group (other than Parent,
the Purchaser or any of their affiliates or representatives) concerning any
Competing Transaction or enter into any agreement, arrangement or understanding
requiring the Company to abandon, terminate or fail to consummate the Merger or 


<PAGE>


any other transactions contemplated by the Merger Agreement.  Seller will
promptly cease any existing activities, discussions or negotiations with any
parties conducted heretofore with respect to any Competing Transaction.  Any
action taken by the Company or any member of the Board of Directors of the
Company including, if applicable, Seller acting solely in such capacity, in
accordance with the provisions of Section 6.09 of the Merger Agreement shall be
deemed not to violate this Section 1.4.
     
     1.5  Reasonable Efforts. Subject to the terms and conditions of this
Agreement, Stockholder hereby agrees to use all reasonable efforts to take, or
cause to be taken, all actions, and to do, or cause to be done, all things
necessary, proper or advisable under applicable laws and regulations to tender
the Tender Shares as contemplated by this Agreement.

     1.6  Waiver of Appraisal Rights. Stockholder hereby waives any rights of
appraisal or rights to dissent from the Merger that he may have.

     2.   Termination. This Agreement and Stockholder's obligation to tender and
vote the Tender Shares as provided herein shall terminate on the Termination
Date. As used herein, the term "Termination Date" means the first to occur of
(a) the Effective Time, (b) contemporaneous with the termination of the Merger
Agreement, (c) upon a change of the Board Recommendation that would give Parent
the right to terminate the Merger Agreement, (d) termination or withdrawal of
the Offer by Parent or the Purchaser, (e) written notice of termination of this
Agreement by the Company to Stockholder, and (f) Purchaser's purchase of the
Tender Shares pursuant to the Offer.  Nothing contained in this Article 2 shall
relieve any party from liability for any breach of this Agreement.

     3.   Representation and Warranties.  The undersigned hereby represents and
warrants that the undersigned has full power and authority to tender, sell,
assign and transfer Tender Shares and that, when the same are accepted for
payment and paid for by the Purchaser, the Purchaser will acquire good,
marketable and unencumbered title thereto, free and clear of all liens,
restrictions, charges, claims and encumbrances and the same will not be subject
to any adverse claim.  In addition, to the extent that this Agreement is not
terminated the undersigned shall promptly remit and transfer to the Depositary
(as defined in the Offer Documents) for the account of the Purchaser the whole
of any non-cash dividend, distribution or right issued to the undersigned on or
after August [3], 1998, in respect of the Owned Shares, accompanied by
appropriate documentation of transfer.

     4.   Further Assurances. From time to time, at the Company's request and
expense and without further consideration, Stockholder shall execute and deliver
such additional documents and take all such further action as may be reasonably
necessary 


<PAGE>

to consummate and make effective the transactions contemplated by Section 1 of
this Agreement.

     5.   Miscellaneous.

     5.1  Non-Survival. The representations and warranties made herein shall
terminate on the Termination Date.

     5.2  Entire Agreement; Assignment. This Agreement (i) constitutes the
entire agreement between the parties with respect to the subject matter hereof
and supersedes all other prior agreements and understandings, both written and
oral, between the parties with respect to the subject matter hereof and (ii)
shall not be assigned by operation of law or otherwise.

     5.3  Amendments. This Agreement may not be modified, amended, altered or
supplemented, except upon the execution and delivery of a written agreement
executed by the parties hereto.

     5.4  Notices. All notices, requests, claims, demands and other
communications hereunder shall be in writing and shall be given by hand
delivery, telegram, telex or telecopy or by any courier service, such as Federal
Express, providing proof of delivery. All communications hereunder shall be
delivered to (i) the Stockholder at the most recent address of the Stockholder
shown on the records of the Company and (ii) the Company at 50 Jerome Lane,
Fairview Heights, Illinois 62208, telecopy # 618-394-2411, Attention:  General
Counsel, with a copy to Kirkland & Ellis, 153 East 53rd Street, New York, New
York 10022, telecopy # 212-446-4900, Attention:  Glen E. Hess, P.C., or, in any
case, to such other address as the person to whom notice is given may have
previously furnished to the others in writing in the manner set forth above.

     5.5  Governing Law. This Agreement shall be governed by and construed in
accordance with the laws of the State of Delaware, regardless of the laws that
might otherwise govern under applicable principles of conflicts of laws thereof.

     5.6  Specific Performance. Stockholder recognizes and acknowledges that a
breach by him of any covenants or agreements contained in this Agreement will
cause the Company to sustain damages for which it would not have an adequate
remedy at law for money damages, and therefore Stockholder agrees that in the
event of any such breach the Company shall be entitled to the remedy of specific
performance of such covenants and agreements and injunctive and other equitable
relief in addition to any other remedy to which it may be entitled, at law or in
equity.

     5.7  Counterparts. This Agreement may be executed in two counterparts, each
of which shall be deemed to be an original, but both of which shall constitute
one and the same 


<PAGE>


Agreement. 

     5.8  Descriptive Headings. The descriptive headings used herein are
inserted for convenience of reference only and are not intended to be part of or
to affect the meaning or interpretation of this Agreement.

     5.9  Severability. Whenever possible, each provision or portion of any
provision of this Agreement will be interpreted in such manner as to be
effective and valid under applicable law but if any provision or portion of any
provision of this Agreement is held to be invalid, illegal or unenforceable in
any respect under any applicable law or rule in any jurisdiction, such
invalidity, illegality or unenforceability will not affect any other provision
or portion of any provision in such jurisdiction, and this Agreement will be
reformed, construed and enforced in such jurisdiction as if such invalid,
illegal or unenforceable provision or portion of any provision had never been
contained herein.

     5.10 Parties in Interest.  This Agreement shall be binding upon and inure
solely to the benefit of each party hereto and, other than as specifically set
forth below, nothing in this Agreement, express or implied, is intended to
confer upon any other person any rights or remedies of any nature whatsoever
under or by reason of this Agreement.  Notwithstanding the foregoing, the
Company and Stockholder hereby agree that (i) neither of them shall amend,
modify, supplement, terminate or in any other manner change their respective
rights and obligations hereunder in any manner that will adversely effect the
consummation of the Offer by Purchaser, (ii) that Parent and/or Purchaser may,
in the event of a breach of this Agreement by Stockholder, require the Company
to exercise its rights hereunder in order to obtain compliance herewith by the
Stockholder, and (iii) to the extent the Company does not comply with any demand
by Parent and/or Purchaser as contemplated by clause (ii) above, Parent and/or
Purchaser will have the right to seek damages from the Company for the Company's
failure to take the action contemplated by clause (ii) above.

                           *     *     *     *     *     *

     IN WITNESS WHEREOF, the Company and Stockholder have caused this Agreement
to be duly executed as of the day and year first above written.

                                           
                             ZEIGLER COAL HOLDING COMPANY


                          By: /s/ Chand B. Vyas
                             --------------------------
                             Name: Chand B. Vyas
                             Title: President and CEO


<PAGE>





                          Kinman Ltd. Partners
                          by: John F. Manley, General Partner
                          ------------------------------
                          Print Name  Kinman Ltd. Partners



                          NUMBER OF SHARES OWNED 5,801,738
                                                ----------


<PAGE>
                                                                Exhibit 99(c)(4)


                              FORM OF SUPPORT AGREEMENT


    SUPPORT AGREEMENT (this "Agreement"), dated as of August 3, 1998, by and
between Zeigler Coal Holding Company, a Delaware corporation (the "Company"),
and Michael K. Reilly ("Stockholder") .

    WHEREAS, concurrently herewith, the Company, Coal Ventures, Inc., a Delaware
corporation ("Parent") and Zeigler Acquisition Corporation, a Delaware
corporation and a subsidiary of Parent (the "Purchaser") are entering into an
Agreement and Plan of Merger of even date herewith (the "Merger Agreement"). 
Capitalized terms used but not defined herein have the meanings set forth in the
Merger Agreement. Pursuant to the Merger Agreement, the Purchaser has agreed to
make a tender offer on the terms and conditions set forth in the Merger
Agreement (the "Offer") for any and all outstanding shares of common stock, par
value $.01 per share (the "Shares"), of the Company, at $21.25  per share
(the "Offer Price") net to the seller in cash, to be followed by a merger (the
"Merger") of the Purchaser with and into the Company;

     WHEREAS, as of the date hereof, Stockholder is the beneficial owner of
1,254,350 Shares (the "Owned Shares"); and

     WHEREAS, in recognition of the benefits to be received by the Stockholder
in connection with and in order to facilitate and support the transactions
contemplated by the Merger Agreement and the Offer, the Stockholder and the
Company have agreed, subject to the terms and conditions of this Agreement, that
the Stockholder will, among other things, tender pursuant to the Offer the Owned
Shares, together with any Shares acquired after the date hereof and prior to the
termination of the Offer, whether upon the exercise of options, conversion of
convertible securities or otherwise (collectively with the Owned Shares, the
"Tender Shares").

     NOW, THEREFORE, in consideration of the premises and for other good and
valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties agree as follows:

     1.   Agreement to Tender.

     1.1  Tender. Stockholder hereby agrees to tender (or cause the record owner
of such shares to tender), pursuant to and in accordance with the terms of the
Offer no later than three business days prior to the Expiration Date, the Tender
Shares and to not withdraw such Tender Shares, except following termination of
this Agreement pursuant to Section 2 hereof.  Stockholder 



<PAGE>


hereby acknowledges and agrees that Purchaser's obligation to accept for payment
and pay for the Tender Shares is subject to the terms and conditions of the
Offer.  Stockholder hereby authorizes the Company to permit Parent and the
Purchaser to publish and disclose in the Offer Documents and, if approval of the
Company's stockholders is required under applicable law, the Proxy Statement
(including all documents and schedules filed with the Securities and Exchange
Commission) the Stockholder's identity and ownership of the Tender Shares and
the nature of Stockholder's commitments, arrangements and understandings under
this Agreement.

     1.2  Voting.  Stockholder hereby agrees that, during the time this
Agreement is in effect, at any meeting of the stockholders of the Company,
however called (or in any written consent in lieu thereof), Stockholder shall
not vote the Tender Shares in favor of any Competing Transaction.

     1.3  No Inconsistent Arrangements.  Stockholder hereby covenants and agrees
that, except as contemplated by this Agreement, it shall not (i) transfer (which
term shall include, without limitation, any sale, gift, pledge or other
disposition), or consent to any transfer of, any or all of the Tender Shares or
any interest therein, (ii) enter into any contract, option or other agreement or
understanding with respect to any transfer of any or all of the Tender Shares or
any interest therein, (iii) grant any proxy, power-of-attorney or other
authorization in or with respect to the Tender Shares, other than those that are
intended to facilitate or which do not impede or impair Stockholder's compliance
with the terms of this Agreement, (iv) deposit the Tender Shares into a voting
trust or enter into a voting agreement or arrangement with respect to the Tender
Shares or (v) take any other action that would in any way restrict, limit or
interfere with the performance of his obligations hereunder or the transactions
contemplated hereby or by the Merger Agreement.  Notwithstanding the foregoing,
Stockholder may distribute or otherwise transfer the Tender Shares to its
general partner and limited partners or other transferee, if applicable,
provided that each such person will take such share subject to the terms and
conditions of this Agreement and agrees so in writing at the time of transfer.

     1.4  No Solicitation.  Stockholder hereby agrees that Stockholder shall
not, and shall not permit or authorize any of his affiliates, representatives or
agents to, directly or indirectly, solicit, participate in or initiate
discussions or negotiations with, or provide or disclose any information to, any
corporation, partnership, person or other entity or group (other than Parent,
the Purchaser or any of their affiliates or representatives) concerning any
Competing Transaction or enter into any agreement, arrangement or understanding
requiring the Company to abandon, terminate or fail to consummate the Merger or 


<PAGE>


any other transactions contemplated by the Merger Agreement.  Seller will
promptly cease any existing activities, discussions or negotiations with any
parties conducted heretofore with respect to any Competing Transaction.  Any
action taken by the Company or any member of the Board of Directors of the
Company including, if applicable, Seller acting solely in such capacity, in
accordance with the provisions of Section 6.09 of the Merger Agreement shall be
deemed not to violate this Section 1.4.
     
     1.5  Reasonable Efforts. Subject to the terms and conditions of this
Agreement, Stockholder hereby agrees to use all reasonable efforts to take, or
cause to be taken, all actions, and to do, or cause to be done, all things
necessary, proper or advisable under applicable laws and regulations to tender
the Tender Shares as contemplated by this Agreement.

     1.6  Waiver of Appraisal Rights. Stockholder hereby waives any rights of
appraisal or rights to dissent from the Merger that he may have.

     2.   Termination. This Agreement and Stockholder's obligation to tender and
vote the Tender Shares as provided herein shall terminate on the Termination
Date. As used herein, the term "Termination Date" means the first to occur of
(a) the Effective Time, (b) contemporaneous with the termination of the Merger
Agreement, (c) upon a change of the Board Recommendation that would give Parent
the right to terminate the Merger Agreement, (d) termination or withdrawal of
the Offer by Parent or the Purchaser, (e) written notice of termination of this
Agreement by the Company to Stockholder, and (f) Purchaser's purchase of the
Tender Shares pursuant to the Offer.  Nothing contained in this Article 2 shall
relieve any party from liability for any breach of this Agreement.

     3.   Representation and Warranties.  The undersigned hereby represents and
warrants that the undersigned has full power and authority to tender, sell,
assign and transfer Tender Shares and that, when the same are accepted for
payment and paid for by the Purchaser, the Purchaser will acquire good,
marketable and unencumbered title thereto, free and clear of all liens,
restrictions, charges, claims and encumbrances and the same will not be subject
to any adverse claim.  In addition, to the extent that this Agreement is not
terminated the undersigned shall promptly remit and transfer to the Depositary
(as defined in the Offer Documents) for the account of the Purchaser the whole
of any non-cash dividend, distribution or right issued to the undersigned on or
after August [3], 1998, in respect of the Owned Shares, accompanied by
appropriate documentation of transfer.

     4.   Further Assurances. From time to time, at the Company's request and
expense and without further consideration, Stockholder shall execute and deliver
such additional documents and take all such further action as may be reasonably
necessary 


<PAGE>

to consummate and make effective the transactions contemplated by Section 1 of
this Agreement.

     5.   Miscellaneous.

     5.1  Non-Survival. The representations and warranties made herein shall
terminate on the Termination Date.

     5.2  Entire Agreement; Assignment. This Agreement (i) constitutes the
entire agreement between the parties with respect to the subject matter hereof
and supersedes all other prior agreements and understandings, both written and
oral, between the parties with respect to the subject matter hereof and (ii)
shall not be assigned by operation of law or otherwise.

     5.3  Amendments. This Agreement may not be modified, amended, altered or
supplemented, except upon the execution and delivery of a written agreement
executed by the parties hereto.

     5.4  Notices. All notices, requests, claims, demands and other
communications hereunder shall be in writing and shall be given by hand
delivery, telegram, telex or telecopy or by any courier service, such as Federal
Express, providing proof of delivery. All communications hereunder shall be
delivered to (i) the Stockholder at the most recent address of the Stockholder
shown on the records of the Company and (ii) the Company at 50 Jerome Lane,
Fairview Heights, Illinois 62208, telecopy # 618-394-2411, Attention:  General
Counsel, with a copy to Kirkland & Ellis, 153 East 53rd Street, New York, New
York 10022, telecopy # 212-446-4900, Attention:  Glen E. Hess, P.C., or, in any
case, to such other address as the person to whom notice is given may have
previously furnished to the others in writing in the manner set forth above.

     5.5  Governing Law. This Agreement shall be governed by and construed in
accordance with the laws of the State of Delaware, regardless of the laws that
might otherwise govern under applicable principles of conflicts of laws thereof.

     5.6  Specific Performance. Stockholder recognizes and acknowledges that a
breach by him of any covenants or agreements contained in this Agreement will
cause the Company to sustain damages for which it would not have an adequate
remedy at law for money damages, and therefore Stockholder agrees that in the
event of any such breach the Company shall be entitled to the remedy of specific
performance of such covenants and agreements and injunctive and other equitable
relief in addition to any other remedy to which it may be entitled, at law or in
equity.

     5.7  Counterparts. This Agreement may be executed in two counterparts, each
of which shall be deemed to be an original, but both of which shall constitute
one and the same 


<PAGE>


Agreement. 

     5.8  Descriptive Headings. The descriptive headings used herein are
inserted for convenience of reference only and are not intended to be part of or
to affect the meaning or interpretation of this Agreement.

     5.9  Severability. Whenever possible, each provision or portion of any
provision of this Agreement will be interpreted in such manner as to be
effective and valid under applicable law but if any provision or portion of any
provision of this Agreement is held to be invalid, illegal or unenforceable in
any respect under any applicable law or rule in any jurisdiction, such
invalidity, illegality or unenforceability will not affect any other provision
or portion of any provision in such jurisdiction, and this Agreement will be
reformed, construed and enforced in such jurisdiction as if such invalid,
illegal or unenforceable provision or portion of any provision had never been
contained herein.

     5.10 Parties in Interest.  This Agreement shall be binding upon and inure
solely to the benefit of each party hereto and, other than as specifically set
forth below, nothing in this Agreement, express or implied, is intended to
confer upon any other person any rights or remedies of any nature whatsoever
under or by reason of this Agreement.  Notwithstanding the foregoing, the
Company and Stockholder hereby agree that (i) neither of them shall amend,
modify, supplement, terminate or in any other manner change their respective
rights and obligations hereunder in any manner that will adversely effect the
consummation of the Offer by Purchaser, (ii) that Parent and/or Purchaser may,
in the event of a breach of this Agreement by Stockholder, require the Company
to exercise its rights hereunder in order to obtain compliance herewith by the
Stockholder, and (iii) to the extent the Company does not comply with any demand
by Parent and/or Purchaser as contemplated by clause (ii) above, Parent and/or
Purchaser will have the right to seek damages from the Company for the Company's
failure to take the action contemplated by clause (ii) above.

                           *     *     *     *     *     *

     IN WITNESS WHEREOF, the Company and Stockholder have caused this Agreement
to be duly executed as of the day and year first above written.

                                           
                             ZEIGLER COAL HOLDING COMPANY


                          By: /s/ Chand B. Vyas
                             --------------------------
                             Name: Chand B. Vyas
                             Title: President and CEO


<PAGE>






                          /s/ Michael K. Reilly
                          ------------------------------
                          Print Name  Michael K. Reilly



                          NUMBER OF SHARES OWNED 1,254,350
                                                ----------


<PAGE>
                                                                Exhibit 99(c)(5)


                              FORM OF SUPPORT AGREEMENT


    SUPPORT AGREEMENT (this "Agreement"), dated as of August 3, 1998, by and
between Zeigler Coal Holding Company, a Delaware corporation (the "Company"),
and Chand B. Vyas ("Stockholder") .

    WHEREAS, concurrently herewith, the Company, Coal Ventures, Inc., a Delaware
corporation ("Parent") and Zeigler Acquisition Corporation, a Delaware
corporation and a subsidiary of Parent (the "Purchaser") are entering into an
Agreement and Plan of Merger of even date herewith (the "Merger Agreement"). 
Capitalized terms used but not defined herein have the meanings set forth in the
Merger Agreement. Pursuant to the Merger Agreement, the Purchaser has agreed to
make a tender offer on the terms and conditions set forth in the Merger
Agreement (the "Offer") for any and all outstanding shares of common stock, par
value $.01 per share (the "Shares"), of the Company, at $21.25 per share
(the "Offer Price") net to the seller in cash, to be followed by a merger (the
"Merger") of the Purchaser with and into the Company;

     WHEREAS, as of the date hereof, Stockholder is the beneficial owner of
639,920 Shares (the "Owned Shares"); and

     WHEREAS, in recognition of the benefits to be received by the Stockholder
in connection with and in order to facilitate and support the transactions
contemplated by the Merger Agreement and the Offer, the Stockholder and the
Company have agreed, subject to the terms and conditions of this Agreement, that
the Stockholder will, among other things, tender pursuant to the Offer the Owned
Shares, together with any Shares acquired after the date hereof and prior to the
termination of the Offer, whether upon the exercise of options, conversion of
convertible securities or otherwise (collectively with the Owned Shares, the
"Tender Shares").

     NOW, THEREFORE, in consideration of the premises and for other good and
valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties agree as follows:

     1.   Agreement to Tender.

     1.1  Tender. Stockholder hereby agrees to tender (or cause the record owner
of such shares to tender), pursuant to and in accordance with the terms of the
Offer no later than three business days prior to the Expiration Date, the Tender
Shares and to not withdraw such Tender Shares, except following termination of
this Agreement pursuant to Section 2 hereof.  Stockholder 



<PAGE>


hereby acknowledges and agrees that Purchaser's obligation to accept for payment
and pay for the Tender Shares is subject to the terms and conditions of the
Offer.  Stockholder hereby authorizes the Company to permit Parent and the
Purchaser to publish and disclose in the Offer Documents and, if approval of the
Company's stockholders is required under applicable law, the Proxy Statement
(including all documents and schedules filed with the Securities and Exchange
Commission) the Stockholder's identity and ownership of the Tender Shares and
the nature of Stockholder's commitments, arrangements and understandings under
this Agreement.

     1.2  Voting.  Stockholder hereby agrees that, during the time this
Agreement is in effect, at any meeting of the stockholders of the Company,
however called (or in any written consent in lieu thereof), Stockholder shall
not vote the Tender Shares in favor of any Competing Transaction.

     1.3  No Inconsistent Arrangements.  Stockholder hereby covenants and agrees
that, except as contemplated by this Agreement, it shall not (i) transfer (which
term shall include, without limitation, any sale, gift, pledge or other
disposition), or consent to any transfer of, any or all of the Tender Shares or
any interest therein, (ii) enter into any contract, option or other agreement or
understanding with respect to any transfer of any or all of the Tender Shares or
any interest therein, (iii) grant any proxy, power-of-attorney or other
authorization in or with respect to the Tender Shares, other than those that are
intended to facilitate or which do not impede or impair Stockholder's compliance
with the terms of this Agreement, (iv) deposit the Tender Shares into a voting
trust or enter into a voting agreement or arrangement with respect to the Tender
Shares or (v) take any other action that would in any way restrict, limit or
interfere with the performance of his obligations hereunder or the transactions
contemplated hereby or by the Merger Agreement.  Notwithstanding the foregoing,
Stockholder may distribute or otherwise transfer the Tender Shares to its
general partner and limited partners or other transferee, if applicable,
provided that each such person will take such share subject to the terms and
conditions of this Agreement and agrees so in writing at the time of transfer.

     1.4  No Solicitation.  Stockholder hereby agrees that Stockholder shall
not, and shall not permit or authorize any of his affiliates, representatives or
agents to, directly or indirectly, solicit, participate in or initiate
discussions or negotiations with, or provide or disclose any information to, any
corporation, partnership, person or other entity or group (other than Parent,
the Purchaser or any of their affiliates or representatives) concerning any
Competing Transaction or enter into any agreement, arrangement or understanding
requiring the Company to abandon, terminate or fail to consummate the Merger or 


<PAGE>


any other transactions contemplated by the Merger Agreement.  Seller will
promptly cease any existing activities, discussions or negotiations with any
parties conducted heretofore with respect to any Competing Transaction.  Any
action taken by the Company or any member of the Board of Directors of the
Company including, if applicable, Seller acting solely in such capacity, in
accordance with the provisions of Section 6.09 of the Merger Agreement shall be
deemed not to violate this Section 1.4.
     
     1.5  Reasonable Efforts. Subject to the terms and conditions of this
Agreement, Stockholder hereby agrees to use all reasonable efforts to take, or
cause to be taken, all actions, and to do, or cause to be done, all things
necessary, proper or advisable under applicable laws and regulations to tender
the Tender Shares as contemplated by this Agreement.

     1.6  Waiver of Appraisal Rights. Stockholder hereby waives any rights of
appraisal or rights to dissent from the Merger that he may have.

     2.   Termination. This Agreement and Stockholder's obligation to tender and
vote the Tender Shares as provided herein shall terminate on the Termination
Date. As used herein, the term "Termination Date" means the first to occur of
(a) the Effective Time, (b) contemporaneous with the termination of the Merger
Agreement, (c) upon a change of the Board Recommendation that would give Parent
the right to terminate the Merger Agreement, (d) termination or withdrawal of
the Offer by Parent or the Purchaser, (e) written notice of termination of this
Agreement by the Company to Stockholder, and (f) Purchaser's purchase of the
Tender Shares pursuant to the Offer.  Nothing contained in this Article 2 shall
relieve any party from liability for any breach of this Agreement.

     3.   Representation and Warranties.  The undersigned hereby represents and
warrants that the undersigned has full power and authority to tender, sell,
assign and transfer Tender Shares and that, when the same are accepted for
payment and paid for by the Purchaser, the Purchaser will acquire good,
marketable and unencumbered title thereto, free and clear of all liens,
restrictions, charges, claims and encumbrances and the same will not be subject
to any adverse claim.  In addition, to the extent that this Agreement is not
terminated the undersigned shall promptly remit and transfer to the Depositary
(as defined in the Offer Documents) for the account of the Purchaser the whole
of any non-cash dividend, distribution or right issued to the undersigned on or
after August [3], 1998, in respect of the Owned Shares, accompanied by
appropriate documentation of transfer.

     4.   Further Assurances. From time to time, at the Company's request and
expense and without further consideration, Stockholder shall execute and deliver
such additional documents and take all such further action as may be reasonably
necessary 


<PAGE>

to consummate and make effective the transactions contemplated by Section 1 of
this Agreement.

     5.   Miscellaneous.

     5.1  Non-Survival. The representations and warranties made herein shall
terminate on the Termination Date.

     5.2  Entire Agreement; Assignment. This Agreement (i) constitutes the
entire agreement between the parties with respect to the subject matter hereof
and supersedes all other prior agreements and understandings, both written and
oral, between the parties with respect to the subject matter hereof and (ii)
shall not be assigned by operation of law or otherwise.

     5.3  Amendments. This Agreement may not be modified, amended, altered or
supplemented, except upon the execution and delivery of a written agreement
executed by the parties hereto.

     5.4  Notices. All notices, requests, claims, demands and other
communications hereunder shall be in writing and shall be given by hand
delivery, telegram, telex or telecopy or by any courier service, such as Federal
Express, providing proof of delivery. All communications hereunder shall be
delivered to (i) the Stockholder at the most recent address of the Stockholder
shown on the records of the Company and (ii) the Company at 50 Jerome Lane,
Fairview Heights, Illinois 62208, telecopy # 618-394-2411, Attention:  General
Counsel, with a copy to Kirkland & Ellis, 153 East 53rd Street, New York, New
York 10022, telecopy # 212-446-4900, Attention:  Glen E. Hess, P.C., or, in any
case, to such other address as the person to whom notice is given may have
previously furnished to the others in writing in the manner set forth above.

     5.5  Governing Law. This Agreement shall be governed by and construed in
accordance with the laws of the State of Delaware, regardless of the laws that
might otherwise govern under applicable principles of conflicts of laws thereof.

     5.6  Specific Performance. Stockholder recognizes and acknowledges that a
breach by him of any covenants or agreements contained in this Agreement will
cause the Company to sustain damages for which it would not have an adequate
remedy at law for money damages, and therefore Stockholder agrees that in the
event of any such breach the Company shall be entitled to the remedy of specific
performance of such covenants and agreements and injunctive and other equitable
relief in addition to any other remedy to which it may be entitled, at law or in
equity.

     5.7  Counterparts. This Agreement may be executed in two counterparts, each
of which shall be deemed to be an original, but both of which shall constitute
one and the same 


<PAGE>


Agreement. 

     5.8  Descriptive Headings. The descriptive headings used herein are
inserted for convenience of reference only and are not intended to be part of or
to affect the meaning or interpretation of this Agreement.

     5.9  Severability. Whenever possible, each provision or portion of any
provision of this Agreement will be interpreted in such manner as to be
effective and valid under applicable law but if any provision or portion of any
provision of this Agreement is held to be invalid, illegal or unenforceable in
any respect under any applicable law or rule in any jurisdiction, such
invalidity, illegality or unenforceability will not affect any other provision
or portion of any provision in such jurisdiction, and this Agreement will be
reformed, construed and enforced in such jurisdiction as if such invalid,
illegal or unenforceable provision or portion of any provision had never been
contained herein.

     5.10 Parties in Interest.  This Agreement shall be binding upon and inure
solely to the benefit of each party hereto and, other than as specifically set
forth below, nothing in this Agreement, express or implied, is intended to
confer upon any other person any rights or remedies of any nature whatsoever
under or by reason of this Agreement.  Notwithstanding the foregoing, the
Company and Stockholder hereby agree that (i) neither of them shall amend,
modify, supplement, terminate or in any other manner change their respective
rights and obligations hereunder in any manner that will adversely effect the
consummation of the Offer by Purchaser, (ii) that Parent and/or Purchaser may,
in the event of a breach of this Agreement by Stockholder, require the Company
to exercise its rights hereunder in order to obtain compliance herewith by the
Stockholder, and (iii) to the extent the Company does not comply with any demand
by Parent and/or Purchaser as contemplated by clause (ii) above, Parent and/or
Purchaser will have the right to seek damages from the Company for the Company's
failure to take the action contemplated by clause (ii) above.

                           *     *     *     *     *     *

     IN WITNESS WHEREOF, the Company and Stockholder have caused this Agreement
to be duly executed as of the day and year first above written.

                                           
                             ZEIGLER COAL HOLDING COMPANY


                          By: /s/ Chand B. Vyas
                             --------------------------
                             Name: Chand B. Vyas
                             Title: President and CEO

<PAGE>





                          /s/ Chand B. Vyas
                          ------------------------------
                          Print Name  Chand B. Vyas



                          NUMBER OF SHARES OWNED 639,920
                                                ---------


<PAGE>
                                                                Exhibit 99(c)(6)


                              FORM OF SUPPORT AGREEMENT


    SUPPORT AGREEMENT (this "Agreement"), dated as of August 3, 1998, by and
between Zeigler Coal Holding Company, a Delaware corporation (the "Company"),
and Roland E. Casati ("Stockholder") .

    WHEREAS, concurrently herewith, the Company, Coal Ventures, Inc., a Delaware
corporation ("Parent") and Zeigler Acquisition Corporation, a Delaware
corporation and a subsidiary of Parent (the "Purchaser") are entering into an
Agreement and Plan of Merger of even date herewith (the "Merger Agreement"). 
Capitalized terms used but not defined herein have the meanings set forth in the
Merger Agreement. Pursuant to the Merger Agreement, the Purchaser has agreed to
make a tender offer on the terms and conditions set forth in the Merger
Agreement (the "Offer") for any and all outstanding shares of common stock, par
value $.01 per share (the "Shares"), of the Company, at $21.25 per share
(the "Offer Price") net to the seller in cash, to be followed by a merger (the
"Merger") of the Purchaser with and into the Company;

     WHEREAS, as of the date hereof, Stockholder is the beneficial owner of
2,176,000 Shares (the "Owned Shares"); and

     WHEREAS, in recognition of the benefits to be received by the Stockholder
in connection with and in order to facilitate and support the transactions
contemplated by the Merger Agreement and the Offer, the Stockholder and the
Company have agreed, subject to the terms and conditions of this Agreement, that
the Stockholder will, among other things, tender pursuant to the Offer the Owned
Shares, together with any Shares acquired after the date hereof and prior to the
termination of the Offer, whether upon the exercise of options, conversion of
convertible securities or otherwise (collectively with the Owned Shares, the
"Tender Shares").

     NOW, THEREFORE, in consideration of the premises and for other good and
valuable consideration, the receipt and sufficiency of which are hereby
acknowledged, the parties agree as follows:

     1.   Agreement to Tender.

     1.1  Tender. Stockholder hereby agrees to tender (or cause the record owner
of such shares to tender), pursuant to and in accordance with the terms of the
Offer no later than three business days prior to the Expiration Date, the Tender
Shares and to not withdraw such Tender Shares, except following termination of
this Agreement pursuant to Section 2 hereof.  Stockholder 



<PAGE>


hereby acknowledges and agrees that Purchaser's obligation to accept for payment
and pay for the Tender Shares is subject to the terms and conditions of the
Offer.  Stockholder hereby authorizes the Company to permit Parent and the
Purchaser to publish and disclose in the Offer Documents and, if approval of the
Company's stockholders is required under applicable law, the Proxy Statement
(including all documents and schedules filed with the Securities and Exchange
Commission) the Stockholder's identity and ownership of the Tender Shares and
the nature of Stockholder's commitments, arrangements and understandings under
this Agreement.

     1.2  Voting.  Stockholder hereby agrees that, during the time this
Agreement is in effect, at any meeting of the stockholders of the Company,
however called (or in any written consent in lieu thereof), Stockholder shall
not vote the Tender Shares in favor of any Competing Transaction.

     1.3  No Inconsistent Arrangements.  Stockholder hereby covenants and agrees
that, except as contemplated by this Agreement, it shall not (i) transfer (which
term shall include, without limitation, any sale, gift, pledge or other
disposition), or consent to any transfer of, any or all of the Tender Shares or
any interest therein, (ii) enter into any contract, option or other agreement or
understanding with respect to any transfer of any or all of the Tender Shares or
any interest therein, (iii) grant any proxy, power-of-attorney or other
authorization in or with respect to the Tender Shares, other than those that are
intended to facilitate or which do not impede or impair Stockholder's compliance
with the terms of this Agreement, (iv) deposit the Tender Shares into a voting
trust or enter into a voting agreement or arrangement with respect to the Tender
Shares or (v) take any other action that would in any way restrict, limit or
interfere with the performance of his obligations hereunder or the transactions
contemplated hereby or by the Merger Agreement.  Notwithstanding the foregoing,
Stockholder may distribute or otherwise transfer the Tender Shares to its
general partner and limited partners or other transferee, if applicable,
provided that each such person will take such share subject to the terms and
conditions of this Agreement and agrees so in writing at the time of transfer.

     1.4  No Solicitation.  Stockholder hereby agrees that Stockholder shall
not, and shall not permit or authorize any of his affiliates, representatives or
agents to, directly or indirectly, solicit, participate in or initiate
discussions or negotiations with, or provide or disclose any information to, any
corporation, partnership, person or other entity or group (other than Parent,
the Purchaser or any of their affiliates or representatives) concerning any
Competing Transaction or enter into any agreement, arrangement or understanding
requiring the Company to abandon, terminate or fail to consummate the Merger or 


<PAGE>


any other transactions contemplated by the Merger Agreement.  Seller will
promptly cease any existing activities, discussions or negotiations with any
parties conducted heretofore with respect to any Competing Transaction.  Any
action taken by the Company or any member of the Board of Directors of the
Company including, if applicable, Seller acting solely in such capacity, in
accordance with the provisions of Section 6.09 of the Merger Agreement shall be
deemed not to violate this Section 1.4.
     
     1.5  Reasonable Efforts. Subject to the terms and conditions of this
Agreement, Stockholder hereby agrees to use all reasonable efforts to take, or
cause to be taken, all actions, and to do, or cause to be done, all things
necessary, proper or advisable under applicable laws and regulations to tender
the Tender Shares as contemplated by this Agreement.

     1.6  Waiver of Appraisal Rights. Stockholder hereby waives any rights of
appraisal or rights to dissent from the Merger that he may have.

     2.   Termination. This Agreement and Stockholder's obligation to tender and
vote the Tender Shares as provided herein shall terminate on the Termination
Date. As used herein, the term "Termination Date" means the first to occur of
(a) the Effective Time, (b) contemporaneous with the termination of the Merger
Agreement, (c) upon a change of the Board Recommendation that would give Parent
the right to terminate the Merger Agreement, (d) termination or withdrawal of
the Offer by Parent or the Purchaser, (e) written notice of termination of this
Agreement by the Company to Stockholder, and (f) Purchaser's purchase of the
Tender Shares pursuant to the Offer.  Nothing contained in this Article 2 shall
relieve any party from liability for any breach of this Agreement.

     3.   Representation and Warranties.  The undersigned hereby represents and
warrants that the undersigned has full power and authority to tender, sell,
assign and transfer Tender Shares and that, when the same are accepted for
payment and paid for by the Purchaser, the Purchaser will acquire good,
marketable and unencumbered title thereto, free and clear of all liens,
restrictions, charges, claims and encumbrances and the same will not be subject
to any adverse claim.  In addition, to the extent that this Agreement is not
terminated the undersigned shall promptly remit and transfer to the Depositary
(as defined in the Offer Documents) for the account of the Purchaser the whole
of any non-cash dividend, distribution or right issued to the undersigned on or
after August [3], 1998, in respect of the Owned Shares, accompanied by
appropriate documentation of transfer.

     4.   Further Assurances. From time to time, at the Company's request and
expense and without further consideration, Stockholder shall execute and deliver
such additional documents and take all such further action as may be reasonably
necessary 


<PAGE>

to consummate and make effective the transactions contemplated by Section 1 of
this Agreement.

     5.   Miscellaneous.

     5.1  Non-Survival. The representations and warranties made herein shall
terminate on the Termination Date.

     5.2  Entire Agreement; Assignment. This Agreement (i) constitutes the
entire agreement between the parties with respect to the subject matter hereof
and supersedes all other prior agreements and understandings, both written and
oral, between the parties with respect to the subject matter hereof and (ii)
shall not be assigned by operation of law or otherwise.

     5.3  Amendments. This Agreement may not be modified, amended, altered or
supplemented, except upon the execution and delivery of a written agreement
executed by the parties hereto.

     5.4  Notices. All notices, requests, claims, demands and other
communications hereunder shall be in writing and shall be given by hand
delivery, telegram, telex or telecopy or by any courier service, such as Federal
Express, providing proof of delivery. All communications hereunder shall be
delivered to (i) the Stockholder at the most recent address of the Stockholder
shown on the records of the Company and (ii) the Company at 50 Jerome Lane,
Fairview Heights, Illinois 62208, telecopy # 618-394-2411, Attention:  General
Counsel, with a copy to Kirkland & Ellis, 153 East 53rd Street, New York, New
York 10022, telecopy # 212-446-4900, Attention:  Glen E. Hess, P.C., or, in any
case, to such other address as the person to whom notice is given may have
previously furnished to the others in writing in the manner set forth above.

     5.5  Governing Law. This Agreement shall be governed by and construed in
accordance with the laws of the State of Delaware, regardless of the laws that
might otherwise govern under applicable principles of conflicts of laws thereof.

     5.6  Specific Performance. Stockholder recognizes and acknowledges that a
breach by him of any covenants or agreements contained in this Agreement will
cause the Company to sustain damages for which it would not have an adequate
remedy at law for money damages, and therefore Stockholder agrees that in the
event of any such breach the Company shall be entitled to the remedy of specific
performance of such covenants and agreements and injunctive and other equitable
relief in addition to any other remedy to which it may be entitled, at law or in
equity.

     5.7  Counterparts. This Agreement may be executed in two counterparts, each
of which shall be deemed to be an original, but both of which shall constitute
one and the same 


<PAGE>


Agreement. 

     5.8  Descriptive Headings. The descriptive headings used herein are
inserted for convenience of reference only and are not intended to be part of or
to affect the meaning or interpretation of this Agreement.

     5.9  Severability. Whenever possible, each provision or portion of any
provision of this Agreement will be interpreted in such manner as to be
effective and valid under applicable law but if any provision or portion of any
provision of this Agreement is held to be invalid, illegal or unenforceable in
any respect under any applicable law or rule in any jurisdiction, such
invalidity, illegality or unenforceability will not affect any other provision
or portion of any provision in such jurisdiction, and this Agreement will be
reformed, construed and enforced in such jurisdiction as if such invalid,
illegal or unenforceable provision or portion of any provision had never been
contained herein.

     5.10 Parties in Interest.  This Agreement shall be binding upon and inure
solely to the benefit of each party hereto and, other than as specifically set
forth below, nothing in this Agreement, express or implied, is intended to
confer upon any other person any rights or remedies of any nature whatsoever
under or by reason of this Agreement.  Notwithstanding the foregoing, the
Company and Stockholder hereby agree that (i) neither of them shall amend,
modify, supplement, terminate or in any other manner change their respective
rights and obligations hereunder in any manner that will adversely effect the
consummation of the Offer by Purchaser, (ii) that Parent and/or Purchaser may,
in the event of a breach of this Agreement by Stockholder, require the Company
to exercise its rights hereunder in order to obtain compliance herewith by the
Stockholder, and (iii) to the extent the Company does not comply with any demand
by Parent and/or Purchaser as contemplated by clause (ii) above, Parent and/or
Purchaser will have the right to seek damages from the Company for the Company's
failure to take the action contemplated by clause (ii) above.

                           *     *     *     *     *     *

     IN WITNESS WHEREOF, the Company and Stockholder have caused this Agreement
to be duly executed as of the day and year first above written.

                                           
                             ZEIGLER COAL HOLDING COMPANY


                          By: /s/ Chand B. Vyas
                             --------------------------
                             Name: Chand B. Vyas
                             Title: President and CEO

<PAGE>





                          /s/ Roland E. Casati
                          ------------------------------
                          Print Name  Roland E. Casati



                          NUMBER OF SHARES OWNED 2,176,000
                                                ----------



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