EMPLOYMENT AGREEMENT
                                  (Bill Potter)

    AGREEMENT effective as of April 1, 1997 between COSTAIN COAL, INC.
("Employer"), and Bill Potter ("Employee").

                              W I T N E S S E T H:

    WHEREAS Employer desires to employ Employee on the terms hereof, and
Employee desires to accept employment on such terms;

    In consideration of the mutual covenants herein contained, the parties
hereto hereby agree as follows:

    1. Terms and Duties.

    Commencing as of the effective date hereof and continuing until April 1,
2002, and thereafter from year to year unless sooner terminated as herein
provided (the "Employment Term"), the Employer hereby employs the Employee as
its Vice President Western Operations. The Employee hereby accepts such
employment and agrees to devote all of his business time and his best efforts to
the business of Employer and as may be necessary to perform his duties in
accordance with the policies and budgets established from time to time by
Employer and its Board of Directors and President. During the Employment Term,
the Employee will not have any other employment.

    2. Compensation.

    For Employee's services hereunder Employee shall pay to Employee

    (a) a salary at the rate of One Hundred Eleven Thousand Five Hundred & Fifty
($111,550) Dollars per year (or such greater amount as Employer may from time to
time determine), payable periodically in accordance with Employer's usual
executive payroll 




payment procedures; plus

    (b) an annual bonus of Twenty Five Thousand ($25,000) Dollars for each
fiscal year (ending October 31st,) provided that

    (i)    Employee achieves to Employer's satisfaction the performance
           objectives establis hed by Emplo yer.

    (ii)   Employee is in the active employment of Employer, and actually
           engaged in performing his duties, at the close of such fiscal year,
           and

    (iii)  Employer's financial statements for such year, as prepared by its
           independent public accountants, show a positive net income.

Such annual bonus for each year shall be payable within 30 days after the
Employer's accountants have completed preparation of the Employer's financial
statement for such year. The determination of such accountants as to the amount
of the net operating income, as shown in such statements, shall be conclusive on
the parties. In the case of Employer's fiscal year ending in 1997, such bonus
shall be Twenty Five Thousand ($25,000) Dollars. Eligibility for this executive
performance based bonus does not affect Employee's participation in the other
benefit programs available to all salaried employees.

    3. Automobile.

    Employer shall provide Employee with the use of a vehicle leased by Employer
equivalent to a 1994 Ford Crown Victoria. All expenses associated with the use
of said vehicle, including insurance, fuel and maintenance shall be paid, or
reimbursed to Employee, by the Employer.

    4. Place of Employment.

    The Employee's regular place of employment during the Employment Term shall
be 




at the principal executive office of the Employer in West, Kentucky.

    5. Travel; Expenses.

    The Employee shall engage in such travel as may reasonably be required in
connection with the performance of his duties.

    All reasonable travel and other expenses incurred by the Employee (in
accordance with the policies and the budget of the Employer established from
time to time) in carrying out his duties hereunder will be reimbursed by the
Employer on presentation to it of expense accounts and appropriate documentation
in accordance with the customary procedures of the Employer for reimbursement of
executive expenses.

    6. Early Termination of Employment Term on Disability or Death.

    (a) If during the Employment term, the Employee fails because of illness 
or other incapacity (including incapacity because of substance abuse) to 
render to the Employer the services required of him hereunder for a period of 
two months (during which the Employer shall continue the Employee's 
compensation at the rates herein provided), the Employer may, in its 
discretion, give one month notice of termination of the Employment Term 
(during which the Employee's compensation shall likewise be continued), and 
if the Employee shall not resume full performance of his duties within such 
one month period, the Employment Term shall terminate at the expiration 
thereof, provided that any such termination shall not affect the right of the 
Employee (or his estate) to continue to receive benefits under any disability 
insurance plan covering the Employee which is in effect at the date of 
termination.

    (b) The Employment Term shall end upon the death of the Employee.

    (c) In the event of termination for disability or death, the Employer 
shall pay the Employee the Twenty Five Thousand ($25,000) Dollars annual 
bonus provided for in Section 



2(b) prorated for the period from the start of the fiscal year to date of 
termination, provided that the requirement of Sub-Sections 2(b)(i) and ( iii) 
have been met for such fiscal year.

    7. Confidentiality; Competition.

    (a) For the purposes hereof, all confidential information about the business
and affairs of the Employer (including, without limitation, business plans, real
and personal property leases, financial, engineering and marketing information
and information about costs, mining and processing methods, suppliers and
customers) constitute "Employer Confidential Information." Employee acknowledges
that he will have access to and knowledge of Employer Confidential Information,
and that improper use or revelation of same by the Employee during or after the
termination of his employment by the Employer could cause serious injury to the
business of the Employer. Accordingly, the Employee agrees that he will forever
keep secret and inviolate all Employer Confidential Information which comes into
his possession, and that he will not use the same for his own private benefit,
or directly or indirectly for the benefit of others, and that he will not
disclose such Employer Confidential Information to any other person except as
necessary in pursuance of his duties.

    (b) The Employee agrees that during the Employment Term as extended, if 
extended, but in any event until April 1, 2002, (the "Non-Competition 
Period"), the Employee will not (whether as an officer, director, partner, 
proprietor, investor, associate, employee, consultant, adviser, public 
relations or advertising representative or otherwise), directly or 
indirectly, be engaged in the business of coal mining. For purposes of the 
preceding sentence, the Employee shall be deemed to be engaged in any 
business which any person for whom he shall perform services is engaged. 
Nothing herein contained shall be 



deemed to prohibit the Employee from owning, as a passive investment, a 
security of any issuer which is not a supplier, vendor, customer or 
competitor of the Employer.

    (c) Within the terms of this Agreement, it is intended to limit disclosure
and competition by the Employee to the maximum extent permitted by law. If it
shall be finally determined by any court of competent jurisdiction ruling on
this Agreement that the scope or duration of any limitation contained in this
paragraph 7 is too extensive to be legally enforceable, then the parties hereby
agree that the scope and duration (not greater than that provided for herein) of
such limitation shall be the maximum scope and duration which shall be legally
enforceable and the Employee hereby consents to the enforcement of such
limitation as so modified.

    (d) The Employee acknowledges that any violation by him of the provisions 
of this paragraph 7 could cause serious and irreparable damages to the 
Employer. He further acknowledges that it might not be possible to measure 
such damages in money. Accordingly, the Employee further acknowledges that, 
in the event of a breach or threatened breach by him of the provisions of 
this paragraph 7, the Employer may seek, in addition to any other rights or 
remedies, including money damages, an injunction or restraining order, 
restraining the Employee from doing or continuing to do or perform any acts 
constituting such breach or threatened breach.

    8. Benefits.

    The Employer agrees to provide to the Employee the benefits available to 
all salaried employees.

    9. Employee's Representation.

    Employee hereby represents to the Employer that he has full lawful right 
and power 




to enter into this Agreement and carry out his duties hereunder, and that 
same will not constitute a breach of or default under any employment, 
confidentiality, non-competition or other agreement by which he may be bound.

    10. Default by Employee.

    If the Employee shall:

    (i)   commit an act of dishonesty against the Employer or fraud upon the
          Employer; or

    (ii)  breach his obligations under this Agreement and fail to cure such
          breach within five (5) days after written notice thereof; or

    (iii) be convicted of a crime involving moral turpitude; or

    (iv)  fail or neglect diligently to perform his duties hereunder and
          continue in his failure after written notice;

then, and in any such case, the Employer may terminate the employment of the
Employee hereunder and, in the event of any such termination, the Employee shall
no longer have any right to any of the benefits (including future salary
payments) which would otherwise have accrued after such termination.

    11. Successors.

    The rights, benefits, duties and obligations under this Agreement shall 
inure to and be binding upon the Employer, its successors and assigns and 
upon the Employee and his legal representatives, legatees and heirs. It is 
specifically understood, however, that this Agreement may not be transferred 
or assigned by the Employee. The Employer may assign any of its rights and 
obligations hereunder to any subsidiary or affiliate of the Employer, or to a 
successor or survivor resulting from a merger, consolidation, sale of assets 
or stock or 




other corporate reorganization, on condition that the assignee shall assume 
all of the Employer's obligations hereunder and it is agreed that such 
successor or surviving corporation shall continue to be obligated to perform 
the provisions of this Agreement.

    12. Automatic Roll-over.

    This Agreement shall automatically extend for an additional one-year period,
on each expiration date, unless either party shall have theretofore given at
least 30 days prior written notice of termination. Any extension shall be on the
terms in force immediately preceding said extension, unless otherwise agreed in
writing.

    13. Notices.

    Notices hereunder shall be in writing and shall be sent by telegraph or by
certified or registered mail, telecopy, or recognized overnight delivery service
(such as Federal Express) prepaid as follows:

    To Employee:                       To Employer:
    Bill Potter                        Costain Coal, Inc.
                                       249 East Main Street-Suite 200
                                       Lexington, KY 40507
                                       Attention: President

                                       with copy to:
                                       The Renco Group, Inc.
                                       30 Rockefeller Plaza-42nd Floor
                                       New York, NY 10112

and shall be deemed to have been given when telecopied to the addressee or three
days after placed in the mail or the second business day following delivery to a
recognized overnight delivery service (such as Federal Express) or a telegraph
company, prepaid and properly addressed. Notices to the Employee may also be
delivered to him personally. Notices of change of address shall be given as
provided above, but shall be effective only when actually 



received.

    14. Waiver.

    The failure of either party to insist upon the strict performance of any of
the terms, conditions, and provisions of this Agreement shall not be construed
as a waiver or relinquishment of future compliance therewith, and said terms,
conditions, and provisions shall remain in full force and effect. No waiver of
any term or condition of this Agreement on the part of the Employer shall be
effective for any purposes whatsoever unless such waiver is in writing and
signed by the Employer.


    15. Entire Agreement; Governing Law

    There are no oral or written understandings concerning the Employee's
employment by Employer outside of this Agreement. This Agreement may not be
modified except by a writing signed by the parties hereto. This Agreement
supersedes any and all prior employment agreements or understandings. This
Agreement is made under and shall be construed in accordance with, the laws of
Kentucky applicable to agreements to be performed wholly within that state.




    IN WITNESS WHEREOF, the parties hereto have executed and delivered this
Agreement as of the day and year first above written.

                                    EMPLOYER:
                                    COSTAIN COAL, INC.


                                    By /s/ Ira Leon Rennert
                                      ------------------------



                                    EMPLOYEE:

                                    /s/ Bill Potter
                                    --------------------------
                                    Bill Potter