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                                                                  Exhibit 10.18

                             ANKER COAL GROUP, INC.,
                                   as Issuer,

                         THE GUARANTORS SIGNATORY HERETO

                                       and

             HSBC BANK USA (formerly known as Marine Midland Bank),
                                   as Trustee

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

                             SUPPLEMENTAL INDENTURE

                           Dated as of October 1, 1999

                    Amending and Supplementing the Indenture
                         Dated as of September 25, 1997

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

                          9 3/4% SENIOR NOTES DUE 2007


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     SUPPLEMENTAL INDENTURE (the "Supplemental Indenture"), dated as of October
1, 1999, among ANKER COAL GROUP, INC., a corporation organized under the laws of
the State of Delaware (the "Company"), and HSBC BANK USA (formerly known as
Marine Midland Bank), a New York banking corporation and trust company, as
trustee (the "Trustee"), amending and supplementing the Indenture, dated as of
September 25, 1997 (the "Original Indenture") among the Company, the Guarantors
signatory thereto and the Trustee, which provided for the issuance of up to
$125,000,000 aggregate principal amount of 9 3/4% Senior Noes Due 2007. (The
Original Indenture as amended or supplemented through the date hereof and as
supplemented by this Supplemental Indenture and as it may hereafter be
supplemented is referred to herein as the "Indenture"; capitalized terms used
herein and not otherwise defined herein have the meanings ascribed thereto in
the Indenture).

                                   WITNESSETH:

     WHEREAS, pursuant to Sections 9.1 and 9.2 of the Original Indenture, the
Company desires to effect certain amendments (the "Amendments" ) to the Original
Indenture which are set forth in this Supplemental Indenture; and

     WHEREAS, Simba Group, Inc. ("Simba") is a wholly-owned Subsidiary of the
Company, and as of the Issue Date, the Company had designated Simba as an
Unrestricted Subsidiary which was not a Guarantor under the Original Indenture;
and

     WHEREAS, pursuant to Sections 9.1 and 10.3 of the Original Indenture, the
Company and Simba each desire that it shall take all such actions and execute
and deliver all such agreements, instruments and documents as are required to
join Simba as a Guarantor under the Indenture; and

     WHEREAS, pursuant to Section 9.2 of the Indenture, adoption of certain of
the Amendments requires the consent of Holders of a majority in principal amount
of the Notes then outstanding; and

     WHEREAS, the Company has delivered to the Trustee written consents to the
Amendments of at least a majority in principal amount of the outstanding Notes;
and

     WHEREAS, the Company has delivered to the Trustee (i) an Officers'
Certificate and (ii) an Opinion of Counsel pursuant to Sections 9.6 of the
Indenture with respect to this Supplemental Indenture; and

     WHEREAS, the respective Boards of Directors of the Company, the Guarantors
and Simba have duly authorized the execution and delivery of this Supplemental
Indenture and have done all things necessary to make this Supplemental Indenture
a valid, binding and enforceable agreement in accordance with its terms; and

     WHEREAS, based on the foregoing, the Trustee is willing to execute and
deliver this Supplemental Indenture.


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     NOW, THEREFORE, KNOW ALL MEN BY THESE PRESENTS, THAT THIS SUPPLEMENTAL
INDENTURE WITNESSETH:

     That the Company, the Guarantors, Simba and the Trustee in consideration of
the premises set forth herein, and for other good and valuable consideration,
the receipt and sufficiency of which are hereby acknowledged, and intending to
be legally bound hereby, DO HEREBY AGREE AS FOLLOWS:

                                   ARTICLE ONE

                                    INDENTURE

SECTION 1.01      Effect of the Original Indenture.

     Except as specifically provided in this Supplemental Indenture, the
Original Indenture, as heretofore supplemented and amended, shall remain in full
force and effect.

                                   ARTICLE TWO

                           AMENDMENTS TO THE INDENTURE

SECTION 2.01  Preamble.

     The Indenture is hereby amended by deleting all references to "Marine
Midland Bank," and substituting in lieu thereof the words "HSBC Bank USA
(formerly known as Marine Midland Bank)."

SECTION 2.02  Definitions.

     (a) Section 1. 1 of the Indenture is hereby amended by deleting the
following words from the end of the definition of "Affiliate":

     "; provided that beneficial ownership of 10% or more of the voting
securities of a Person shall be deemed to be control"

     (b) Section 1. 1 of the Indenture is hereby amended by deleting the
definition of "Asset Sale."

     (c) Section 1.1 of the Indenture is hereby amended by deleting the
definitions of "Change of Control," "Continuing Directors," and "Permitted
Holders."



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     (d) Section 1.1 of the Indenture is hereby amended by adding the following
proviso to the end of the definition of "Consolidated Cash Flow":

         "; provided that any contingent restriction contained in any thereof
         shall not be deemed to prevent any such dividend until the applicable
         contingency shall have occurred."

     (e) Section 1.1 of the Indenture is hereby amended by adding the following
proviso to the end of clause (ii) the definition of "Consolidated Net Income":

         "; provided that any contingent restriction contained in any thereof
         shall not be deemed to prevent any such declaration or payment of any
         such dividend or similar distribution until the applicable contingency
         shall have occurred."

     (f) Section 1.1 of the Indenture is hereby amended by deleting the
definition of "Credit Facilities" and substituting in lieu thereof the following
definition (changed text appearing in bold):

     "'Credit Facilities' means, with respect to the Company, one or more debt
     facilities (including, without limitation, the LOAN AGREEMENT) or
     commercial paper facilities with banks, FINANCIAL INSTITUTIONS or other
     INSTITUTIONAL lenders providing for revolving credit loans, term loans or
     letters of credit, in each case, as amended, restated, modified, renewed,
     refunded, replaced or refinanced in whole or in part from time to time."

     (g) Section 1.1 of the Indenture is hereby amended by deleting the
definition of "Equity Interests" and substituting in lieu thereof the following
definition (changed text appearing in bold):

     "'Equity Interests' means Capital Stock, THE WARRANTS and all OTHER
     warrants, options or other rights to acquire Capital Stock (but excluding
     any debt security that is convertible into, or exchangeable for, Capital
     Stock)."

     (h) Section 1.1 of the Indenture is hereby amended by adding to the
definition of "Equity Offering" the following clauses (iv) and (v) (changed text
appearing in bold):

     ", (iv) ISSUANCES OF EQUITY INTERESTS TO HOLDERS OF NEW NOTES, OR (v)
     ISSUANCES OF EQUITY INTERESTS TO PURCHASERS UNDER THE PRIVATE PLACEMENT."

     (i) Section 1.1 of the Indenture is hereby amended by inserting between the
definitions of "Exchange Notes" and "Exchange Offer" the following definition
(changed text appearing in bold):


     "'EXCHANGING NOTEHOLDERS' MEANS THE ENTITIES LISTED ON SCHEDULE III TO THE
     PURCHASE


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     AGREEMENT."

     (j) Section 1.1 of the Indenture is hereby amended by by deleting the
definition of "Existing Indebtedness" and substituting in lieu thereof the
following definition (changed text appearing in bold):

     "'Existing Indebtedness' means Indebtedness of the Company and its
     Subsidiaries (other than Indebtedness under the LOAN AGREEMENT) in
     existence on the date of OCTOBER 26, 1999, until such amounts are repaid."

     (k) Section 1.1 of the Indenture is hereby amended by inserting between the
definitions of "Issue Date" and "Legal Holiday" the following definition
(changed text appearing in bold):

     "'JJF PURCHASE AGREEMENT' MEANS THE EXCHANGE AND PURCHASE AGREEMENT DATED
     OCTOBER 26, 1999 BY AND AMONG THE COMPANY, THE GUARANTORS AND THE JJF GROUP
     LIMITED LIABILITY COMPANY, AS AMENDED, WAIVED OR OTHERWISE MODIFIED FROM
     TIME TO TIME IN ACCORDANCE WITH THE PROVISIONS THEREOF."

     (l) The Indenture is hereby amended by deleting all references to "Amended
and Restated Revolving Credit Facility," including the definition thereof
contained in Section 1.1 of the Indenture, and substituting in lieu thereof the
term "Loan Agreement" in Section 1.1 between the definitions of "Liquidated
Damages" and "Net Income" by inserting the following definition (changed text
appearing in bold):

     "'LOAN AGREEMENT' MEANS THAT CERTAIN LOAN AND SECURITY AGREEMENT DATED AS
     OF NOVEMBER 21, 1998 BY AND AMONG CERTAIN OF THE RESTRICTED SUBSIDIARIES,
     AS BORROWERS, AND THE FINANCIAL INSTITUTIONS NAMED THEREIN, AS LENDERS, AND
     FOOTHILL CAPITAL CORPORATION, AS AGENT, INCLUDING ANY RELATED NOTES,
     GUARANTEES, COLLATERAL DOCUMENTS, INSTRUMENTS, AGREEMENTS EXECUTED IN
     CONNECTION THEREWITH AND IN EACH CASE AS AMENDED, EXTENDED, MODIFIED,
     RENEWED, REFUNDED, REPLACED OR REFINANCED FROM TIME TO TIME."

     (m) Section 1.1 of the Indenture is hereby amended by inserting between the
definitions of "Net Proceeds" and "Non-Recourse Debt" the following definitions
(changed text appearing in bold):

     "'NEW NOTE INDENTURE' MEANS THE INDENTURE DATED AS OF OCTOBER 1, 1999 AMONG
     THE COMPANY, AS ISSUER, THE GUARANTORS SIGNATORY THERETO AND THE BANK OF
     NEW YORK, AS TRUSTEE.

     'NEW NOTES' MEANS ALL OF THE COMPANY'S NOTES ISSUED PURSUANT TO THE NEW
     NOTE INDENTURE, AND THE INCURRENCE BY THE GUARANTORS OF ALL GUARANTEES
     UNDER THE NEW NOTE INDENTURE."


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     (n) Section 1.1 of the Indenture is hereby amended by adding the following
after the parenthetical of the definition of "Permitted Business" (changed text
appearing in bold):

     "AND PARTICIPATION IN THE OWNERSHIP AND OPERATION OF COAL-FIRED ELECTRIC
     POWER GENERATING FACILITIES THAT PURCHASE COAL OR OTHER INVENTORY FROM THE
     COMPANY OR ANY RESTRICTED SUBSIDIARY."

     (o) Section 1.1 of the Indenture is hereby amended by adding to the
definition of "Permitted Investments" a new clause (xii) as follows (changed
text appearing in bold):

     "; AND (XII) ANY INVESTMENT OF EXCLUDED ASSETS (OTHER THAN MOBILE
     EQUIPMENT) (AS EACH CAPITALIZED TERM IS DEFINED IN THE NEW NOTE INDENTURE)
     IN ANY PERSON ENGAGED IN THE OWNERSHIP AND OPERATION OF A COAL-FIRED POWER
     GENERATION FACILITY THAT PURCHASES COAL OR OTHER INVENTORY FROM THE COMPANY
     OR ANY RESTRICTED SUBSIDIARY; PROVIDED, HOWEVER, THAT ANY OWNERSHIP
     INTEREST IN SUCH PERSON RECEIVED BY THE COMPANY OR GUARANTOR MAKING SUCH
     INVESTMENT SHALL BE SUBJECTED TO THE LIEN OF THE SECURITY DOCUMENTS (AS
     SUCH CAPITALIZED TERM IS DEFINED IN THE NEW NOTE INDENTURE)."

     (p) Section 1.1 of the Indenture is hereby amended by (I) revising the
definition of "Permitted Liens" to delete clause (i) and insert in lieu thereof
the following clause (i) (changed text appearing in bold):

     "(i) Liens on assets of the Company or any of its Subsidiaries securing
     Senior Indebtedness that is permitted by the terms of this Indenture to be
     incurred (including pursuant to the Credit Facilities AND THE NEW NOTE
     INDENTURE);"

(II) deleting the reference to the second paragraph of Section 4.9 in clause
(vi) and substituting in lieu thereof a reference to the third paragraph of
Section 4.9;

(III) deleting clause (xi) and substituting in lieu thereof the following clause
(xi) (changed text appearing in bold):

     "(xi) Liens on assets of Guarantors WHICH WOULD BE PERMITTED LIENS IF THEY
     WERE LIENS ON ASSETS OF THE COMPANY to secure Guarantor Senior Indebtedness
     of such Guarantors that was permitted by this Indenture and the New Note
     Indenture to be incurred;"

; and (IV) adding a new clause (xii) as follows (changed text appearing in
bold):

     "AND (xii) LIENS SECURING PERMITTED REFINANCING INDEBTEDNESS."

     (q) Section 1.1 of the Indenture is hereby amended by inserting between the
definitions of "Private Placement Legend" and "QIB" the following definitions
(changed text appearing in


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bold):

     "'PRIVATE PLACEMENT MEMORANDUM' MEANS THAT CERTAIN PRIVATE EXCHANGE AND
     PRIVATE PLACEMENT MEMORANDUM DATED OCTOBER 26, 1999.

     'PRIVATE PLACEMENT' MEANS THE ISSUANCE AND SALE UPON THE TERMS AND SUBJECT
     TO THE CONDITIONS SET FORTH IN THE PRIVATE PLACEMENT MEMORANDUM OF
     $13,200,000 PRINCIPAL AMOUNT OF ADDITIONAL NEW NOTES AND WARRANTS.

     'PURCHASE AGREEMENT' MEANS THE EXCHANGE AND PURCHASE AGREEMENT DATED
     OCTOBER 26, 1999 BY AND AMONG THE COMPANY, THE GUARANTORS, THE PURCHASERS
     AND THE EXCHANGING NOTEHOLDERS, AS AMENDED, WAIVED OR OTHERWISE MODIFIED
     FROM TIME TO TIME IN ACCORDANCE WITH THE PROVISIONS THEREOF.

     'PURCHASERS' MEANS THE ENTITIES LISTED ON SCHEDULE II TO THE PURCHASE
     AGREEMENT, AND THEIR SUCCESSORS AND ASSIGNS."

     'PUT AGREEMENT' MEANS THE PUT AGREEMENT DATED AS OF AUGUST 25, 1998 BY AND
     BETWEEN THE COMPANY AND JJF GROUP LIMITED LIABILITY COMPANY, AS AMENDED,
     WAIVED OR OTHERWISE MODIFIED FROM TIME TO TIME IN ACCORDANCE WITH THE
     PROVISIONS THEREOF."

     (r) Section 1.1 of the Indenture is hereby amended by deleting the second
sentence from the definition of "Restricted Subsidiary."

     (s) The Indenture is hereby amended by inserting between the definitions of
"Voting Stock" and "Weighted Average Life to Maturity" the following definitions
(changed text appearing in bold):

     "'WARRANTS' MEANS WARRANTS TO PURCHASE SHARES OF THE COMPANY'S COMMON STOCK
     EQUITY INTERESTS ISSUED PURSUANT TO THE PRIVATE PLACEMENT MEMORANDUM.

     'WARRANT SHARES' MEANS SHARES OF THE COMPANY'S COMMON STOCK EQUITY
     INTERESTS ISSUABLE UPON EXERCISE OF THE WARRANTS."

     (t) Section 1.2 is hereby amended to by deleting all references to "Asset
Sale Offer," "Change of Control Offer," "Change of Control Payment," "Change of
Control Payment Date," "Excess Proceeds," "Offer Amount," "Offer Period" and
"Purchase Date."

SECTION 2.03      Mandatory Redemption.

     Section 3.8 of the Indenture is hereby amended by deleting the references
Sections 4.10 and 4.15 and restating Section 3.8 as follows:


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     "The Company is not required to make mandatory redemption or sinking fund
     payments with respect to the Notes."

SECTION 2.04 Offer to Purchase by Application of Excess Proceeds.

     The Indenture is hereby amended by deleting Section 3.9 thereof in its
     entirety.

SECTION 2.05      Reports.

     The Indenture is hereby amended by deleting Section 4.3 thereof in its
entirety and substituting the following in lieu thereof:

     "Whether or not required by the rules and regulations of the SEC, so long
     as any Notes are outstanding, the Company shall promptly furnish to the
     Trustee and Holders of Notes (i) all quarterly and annual financial
     information that would be required to be contained in a filing with the SEC
     on Forms 10-Q and 10-K if the Company were required to file such Forms,
     including a "Management's Discussion and Analysis of Financial Condition
     and Results of Operations" that describes the financial condition and
     results of operations of the Company and its consolidated Subsidiaries and,
     with respect to the annual information only, a report thereon by the
     Company's certified independent accountants and (ii) all current reports
     that would be required to be filed with the SEC on Form 8-K if the Company
     were required to file such reports, in each case within the time periods
     set forth in the SEC's rules and regulations."

SECTION 2.06      Limitation on Restricted Payments.

     Section 4.7 of the Indenture is hereby amended so that (I) clause (v) of
the first full paragraph following subsection (c) thereof reads as follows
(changed text appearing in bold):


     "(v) the repurchase, retirement or other acquisition or retirement for
     value of common Equity Interests of the Company held by any future, present
     or former employee or director of the Company or any of the Company's
     Restricted Subsidiaries or the estate, heirs or legatees of, or any equity
     controlled by, any such employee or director, pursuant to any management
     equity plan or stock option plan or any other management or employee
     benefit plan or agreement in connection with the termination of such
     person's employment for any reason (including by reason of death or
     disability) INCLUDING, WITHOUT LIMITATION, THE EXCHANGE BY THE COMPANY OF
     THE EQUITY INTERESTS OWNED BY JJF GROUP LIMITED LIABILITY COMPANY IN
     ACCORDANCE WITH THE TERMS OF THE PRIVATE PLACEMENT; provided, however, that
     the aggregate Restricted Payments made under this clause (v) does not
     exceed in any calendar year $2.5 million (with unused amounts in any
     calendar year being carried over to succeeding calendar years subject to a
     maximum (without giving effect to the following proviso) of $7.5 million in
     any calendar year); provided, further that such amount in any calendar year
     may be increased by an amount



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     not to exceed (A) the cash proceeds received by the Company from the sale
     of Equity Interests of the Company to members of management or directors of
     the Company and its Restricted Subsidiaries that occurs after the Issue
     Date (to the extent the cash proceeds from the sale of such Equity
     Interests have not otherwise been applied to the payment of Restricted
     Payments by virtue of the preceding paragraph (c)), plus (B) the cash
     proceeds of key man life insurance policies received by the Company and its
     Restricted Subsidiaries AT ANY TIME after the Issue Date, less (C) the
     amount of any Restricted Payments previously made pursuant to clauses (A)
     and (B) of this subparagraph (v);"

(II) clause (vii) thereof is amended to read as follows (changed text appearing
in bold):

     "(vii) in the event of a CHANGE IN CONTROL UNDER THE CERTIFICATE OF
     DESIGNATION FOR THE COMPANY'S CLASS A PREFERRED STOCK AND THE COMPANY'S
     CLASS B PREFERRED STOCK, the making of mandatory redemptions on the
     Company's Class A Preferred Stock and the Company's Class B Preferred
     Stock, par value $1,000 per share, in each case in accordance with the
     terms of the change of control provisions thereof as in effect on the Issue
     Date;"

; and (III) a new clause (xii) is added as follows (changed text appearing in
bold):

     "; AND (XII) REPURCHASES OF EQUITY INTERESTS DEEMED TO OCCUR UPON EXERCISE
     OF STOCK OPTIONS IF SUCH EQUITY INTERESTS REPRESENT A PORTION OF THE
     EXERCISE PRICE OF SUCH OPTIONS."

SECTION 2.07     Dividend and Other Payment Restrictions Affecting Subsidiaries.

     Clause (iii)(b) of Section 4.8 of the Indenture is hereby amended to read
as follows (changed text appearing in bold):

     "(b) the LOAN AGREEMENT as in effect as of OCTOBER 26, 1999, and any
     amendments, modifications, restatements, renewals, increases, supplements,
     refundings, replacements or refinancings thereof, provided that such
     amendments, modifications, restatements, renewals, increases, supplements,
     refundings, replacements or refinancings are no more restrictive with
     respect to such dividend and other payment restrictions than those
     contained in the LOAN AGREEMENT as in effect on OCTOBER 26, 1999."


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SECTION 2.08 Incurrence of Indebtedness and Issuance of Disqualified Stock.

     (I) The language contained immediately prior to the first proviso in clause
(i) of the third paragraph of Section 4.9 of the Indenture is hereby amended to
read as follows (changed text appearing in bold):

     "(i) the incurrence by the Company OR ANY OF THE GUARANTORS (and the
     guarantee thereof by Guarantors OR THE COMPANY) of Indebtedness and letters
     of credit (with letters of credit being deemed to have a principal amount
     equal to the maximum potential liability of the Company and the Guarantors
     thereunder) under all Credit Facilities;"

     (II) Clause (ii) of the third paragraph of Section 4.9 of the Indenture is
hereby amended to read as follows (changed text appearing in bold):

     "(ii) the incurrence by the Company and the Guarantors of Existing
     Indebtedness and the NEW NOTES."

     (III) Clause (iii) of the third paragraph of Section 4.9 of the Indenture
is hereby amended by adding the following to the end thereof (changed text
appearing in bold):

         "AND ALL NEW NOTES ISSUED PURSUANT TO THE NEW NOTE INDENTURE;"

     ; and (IV) Clause (iv) of the third paragraph of Section 4.9 of the
Indenture is hereby amended by deleting reference to "$5.0 million" and
substituting "$10.0 million" in lieu thereof.

SECTION 2.09      Asset Sales.

     The Indenture is hereby amended by deleting Section 4.10 thereof in its
entirety.

SECTION 2.10      Transactions with Affiliates.

     The second paragraph of Section 4.11 of the Indenture is hereby amended by
adding a new clause (xii) to the end thereof as follows (changed text appearing
in bold):

     "; AND (xii) ANY PAYMENTS MADE TO HOLDERS OF NOTES, WARRANTS AND WARRANT
     SHARES PURSUANT TO SUCH INSTRUMENTS OR ANY RELATED AGREEMENTS OR INVOLVING
     ANY EXERCISE OF RIGHTS BY SUCH HOLDERS PURSUANT TO SUCH AGREEMENTS."

SECTION 2.11      Offer to Repurchase Upon Change of Control.

     The Indenture is hereby amended by deleting Section 4.15 thereof in its
entirety.



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SECTION 2.12      Events of Default.

     Subsection (c) of Section 6.1 of the Indenture is hereby amended by
deleting the references Sections 3.9, 4.10 and 4.15 and restating subsection (c)
as follows:

     "the Company or any of its Restricted Subsidiaries fail to comply with any
     of the provisions of 5.1 hereof,"

SECTION 2.13      Releases Following Sale of Assets.

     Section 10.5 of the Indenture is hereby amended by deleting the references
Section 4.10 and restating Section 10.5 as follows:

     "Concurrently with any sale or disposition of assets (including, if
     applicable, all of the Capital Stock of any Guarantor) by way of merger,
     consolidation or otherwise, any Liens in favor of the Trustee in the assets
     sold thereby shall be released. If the assets sold in such sale or other
     disposition include all or substantially all of the assets of any Guarantor
     or all of the Capital Stock of any Guarantor, then such Guarantor (in the
     event of a sale or other disposition of all of the Capital Stock of such
     Guarantor) or the corporation acquiring the property (in the event of a
     sale or other disposition by way of merger, consolidation or otherwise of
     all or substantially all of the assets of a Guarantor) shall be released
     and relieved of its obligations under its Subsidiary Guarantee and this
     Indenture or Section 10.4 hereof, as the case may be. Upon delivery by the
     Company to the Trustee of an Officers' Certificate and an Opinion of
     Counsel to the effect that such sale or other disposition was made by the
     Company in accordance with the provisions of this Indenture, the Trustee
     shall execute any documents reasonably required in order to evidence the
     release of any Guarantor from its obligations under its Subsidiary
     Guarantees and this Indenture. Any Guarantor not released from its
     obligations under its Subsidiary Guarantee and this Indenture shall remain
     liable for the full amount of principal of and interest on the Notes and
     for the other obligations of any Guarantor under this Indenture as provided
     in this Article X."

                                  ARTICLE THREE

                         JOINDER OF SIMBA AS A GUARANTOR

SECTION 3.01 Agreement to Guarantee; Agreement to be Subject to Provisions as
             Guarantor.

     Simba hereby agrees, jointly and severally with the other Subsidiary
Guarantors, to guarantee the Company's obligations under the Notes and under the
Indenture on the terms and subject to the conditions set forth in Article X of
the Indenture and to be bound by all other applicable provisions of the
Indenture.


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     Subject to the terms and conditions of the Indenture, Simba hereby
unconditionally agrees to be subject to the provisions (including the
representations and warranties) of the Indenture as a Guarantor.

SECTION 3.02      Execution and Delivery of Subsidiary Guarantee.

     Simba hereby agrees that a notation of the Subsidiary Guarantee
substantially in the form of Exhibit A shall be endorsed by an officer of Simba
on each Note authenticated and delivered by the Trustee after the effective date
of this Supplemental Indenture.

                                  ARTICLE FOUR

                                  MISCELLANEOUS

SECTION 4.01      Documentary Requirements.

     The Trustee shall be authorized to accept Indenture certificates and
document delivery requirements appropriately modified to reflect the changes
made by this Supplemental Indenture.

SECTION 4.02      Conditions to Effectiveness.

     This Supplemental Indenture shall become effective upon and simultaneously
with the satisfaction of the last to occur of the following conditions:

     (a) the Trustee shall have received written notice or an Officers'
     Certificate to the effect that the Company's offer made pursuant to its
     Private Exchange and Private Placement Memorandum dated October 26, 1999,
     as amended and supplemented, shall have been consummated;

     (b) the Trustee shall have received an Officers' Certificate and Opinion of
     Counsel pursuant to Section 9.6 of the Indenture.

SECTION 4.03      Trust Indenture Act.

     If any provision of this Supplemental Indenture limits, qualifies or
conflicts with the duties imposed by TIA Section 318(c), the imposed duties
shall control.

SECTION 4.04      Same Instrument.

     The Indenture, as supplemented and amended by this Supplemental Indenture
and all other indentures supplemental thereto, is in all respects ratified and
confirmed, and the


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Indenture, this Supplemental Indenture and all indentures supplemental thereto
shall be read, taken and construed as one and the same instrument.

SECTION 4.05      Successors.

     All agreements of the Company, the Guarantors and Simba in this
Supplemental Indenture shall bind their successors. All agreements of the
Trustee in this Supplemental Indenture shall bind its successors.

SECTION 4.06      Severability.

     In case any provisions of this Supplemental Indenture shall be invalid,
illegal or unenforceable, the validity, legality and enforceability of the
remaining provisions shall not in any way be affected or impaired thereby.

SECTION 4.07      Effect of Headings.

     The Headings of the Articles and Sections of this Supplemental Indenture
have been inserted for convenience of reference only, are not to be considered a
part of this Supplemental Indenture and shall in no way modify or restrict any
of the terms or provisions hereof.

SECTION 4.08      Governing Law.

     THE INTERNAL LAW OF THE STATE OF NEW YORK SHALL GOVERN AND BE USED TO
CONSTRUE THIS SUPPLEMENTAL INDENTURE.

SECTION 4.09      Counterpart Originals.

     The parties may sign any number of copies of this Supplemental Indenture.
Each signed copy shall be an original, but all of them together represent the
same agreement.

SECTION 4.10      Acceptance by Trustee.

     The Trustee hereby accepts the trusts in this Supplemental Indenture
declared and provided upon the terms and conditions set forth in the Indenture.
The Trustee shall not be responsible in any manner whatsoever for the validity
or sufficiency of this Supplemental Indenture or the due execution hereof by the
Company or for or in respect of the recitals and statements contained herein,
all of which recitals and statements are made solely by the Company.

SECTION 4.11      Notice to Holders.

     After the Amendments become effective, the Company shall mail to the
Holders a


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notice briefly describing such Amendments pursuant to Section 9.2 of the
Indenture.

SECTION 4.12      Benefits of Supplemental Indenture.

     Nothing in this Supplemental Indenture, express or implied, shall give to
any Person, other than the parties hereto and their successors hereunder, any
Paying Agent and the Holders, any benefit or any legal or equitable right,
remedy or claim under this Supplemental Indenture.

SECTION 4.13      Notation on Notes.

     (a) Notes authenticated and delivered after the effectiveness of this
Supplemental Indenture shall be imprinted by the Trustee substantially with the
following notation pursuant to Section 9.5 of the Indenture:

     "Anker Coal Group, Inc. (the "Company"), certain subsidiaries of the
     Company and the Trustee have entered into a supplemental Indenture dated as
     of October 1, 1999, pursuant to which the Indenture was amended, among
     other things, to (i) amend, eliminate or replace certain of the definitions
     contained in the Indenture, (ii) eliminate Sections 3.9 and 4.10 of the
     Indenture, which previously restricted certain Asset Sales and provided for
     certain Asset Sale Offers, and Section 4.15 of the Indenture, which
     previously restricted certain Changes of Control and provided for certain
     mandatory redemptions upon certain Changes of Control, (iii) amend certain
     of the other restrictive covenants contained in Article IV of the
     Indenture, and (iv) add a Guarantor. Reference is hereby made to such
     Supplemental Indenture for the full text of such amendments, copies of
     which are on file with the Trustee."

     (b) If the Company or the Trustee shall so determine, new Notes so modified
as to conform, in the opinion of the Trustee and the Board of Directors, to any
modification effected by this Supplemental Indenture shall be prepared and
executed by the Company, authenticated by the Trustee and delivered in exchange
for the Notes then outstanding.

                                       ***

                    [SIGNATURES APPEAR ON THE FOLLOWING PAGE]


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     IN WITNESS HEREOF, the parties hereto have caused this Supplemental
Indenture to be duly executed, effective as of the day and year first above
written.

                  ANKER COAL GROUP, INC.,
                  as Issuer

                  By:     /s/ Bruce Sparks
                    --------------------------------------
                          Name: Bruce Sparks
                          Title: President

                  HSBC BANK USA (formerly known as Marine Midland
                    Bank), as Trustee

                  By:     /s/Frank Godino
                    ---------------------------------------
                          Name: Frank Godino
                          Title:  Vice President

                  SIMBA GROUP, INC.,
                  as Guarantor

                  By:     /s/ Bruce Sparks
                    -----------------------------------------
                          Name: Bruce Sparks
                          Title: President

                  EACH OTHER ENTITY LISTED ON SCHEDULE I
                  HERETO, as Guarantors

                  By:     /s/ B. Judd Hartman
                    -----------------------------------------
                          Name:  B. Judd Hartman
                          Title: Secretary


                                       14

   16



                                   SCHEDULE I

                                  SUBSIDIARIES




COMPANY                                                              STATE OF INCORPORATION

                                                                        
Anker Group, Inc.                                                             Delaware

Anker Energy Corporation                                                      Delaware

Bronco Mining Company, Inc.                                                   West Virginia

Anker Power Services, Inc.                                                    West Virginia

Anker West Virginia Mining Company, Inc.                                      West Virginia

Juliana Mining Company, Inc.                                                  West Virginia

King Knob Coal Co., Inc.                                                      West Virginia

Vantrans, Inc.                                                                Delaware

Melrose Coal Company, Inc.                                                    West Virginia

Marine Coal Sales Company                                                     Delaware

Hawthorne Coal Company, Inc.                                                  West Virginia

Upshur Property, Inc.                                                         Delaware

Heather Glen Resources, Inc.                                                  West Virginia

New Allegheny Land Holding Company, Inc.                                      West Virginia

Patriot Mining Company, Inc.                                                  West Virginia

Vindex Energy Corporation                                                     West Virginia

Anker Virginia Mining Company, Inc.                                           Virginia



                                       15

   17





                                                                       EXHIBIT A

                              SUBSIDIARY GUARANTEE

     Each of the corporations listed on Schedule I hereto (hereinafter referred
to as the "Guarantors", which term includes any successor or additional
Guarantor under the Indenture (the "Indenture") referred to in the Note upon
which this notation is endorsed), has unconditionally guaranteed (a) the due and
punctual payment of the principal of, premium, Liquidated Damages, if any, and
interest on the Notes, whether at maturity or on an Interest Payment Date, by
acceleration, call for redemption or otherwise, (b) the due and punctual payment
of interest on the overdue principal of, premium and Liquidated Damages, if any,
and interest on the Notes, to the extent lawful, (c) the due and punctual
performance of all other obligations of the Company to the Holders or the
Trustee, all in accordance with the terms set forth in the Indenture, and (d) in
case of any extension of time of payment or renewal of any Notes or any of such
other obligations, the same will be promptly paid in full when due or performed
in accordance with the terms of the extension or renewal, whether at stated
maturity, by acceleration or otherwise.

     No stockholder, officer, director or incorporator, as such, past, present
or future, of the Guarantors shall have any personal liability under this
Subsidiary Guarantee by reason of his or its status as such stockholder,
officer, director or incorporator.

     This Subsidiary Guarantee shall be binding upon each Guarantor and its
successors and assigns and shall inure to the benefit of the successors and
assigns of the Trustee and the Holders and, in the event of any transfer or
assignment of rights by any Holder or the Trustee, the rights and privileges
herein conferred upon that party shall automatically extend to and be vested in
such transferee or assignee, all subject to the terms and conditions hereof.

     This Subsidiary Guarantee shall not be valid or obligatory for any purpose
until the certificate of authentication on the Note upon which this Subsidiary
Guarantee is noted shall have been executed by the Trustee under the Indenture
by the manual signature of one of its authorized officers.

                                          ANKER GROUP, INC.

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

                                          EACH OTHER ENTITY LISTED ON
                                                   SCHEDULE I HERETO

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

   18




                                   SCHEDULE I

                                  SUBSIDIARIES




COMPANY                                                              STATE OF INCORPORATION

                                                                         
Anker Group, Inc.                                                             Delaware

Anker Energy Corporation                                                      Delaware

Bronco Mining Company, Inc.                                                   West Virginia

Anker Power Services, Inc.                                                    West Virginia

Anker West Virginia Mining Company, Inc.                                      West Virginia

Juliana Mining Company, Inc.                                                  West Virginia

King Knob Coal Co., Inc.                                                      West Virginia

Vantrans, Inc.                                                                Delaware

Melrose Coal Company, Inc.                                                    West Virginia

Marine Coal Sales Company                                                     Delaware

Hawthorne Coal Company, Inc.                                                  West Virginia

Upshur Property, Inc.                                                         Delaware

Heather Glen Resources, Inc.                                                  West Virginia

New Allegheny Land Holding Company, Inc.                                      West Virginia

Patriot Mining Company, Inc.                                                  West Virginia

Vindex Energy Corporation                                                     West Virginia

Anker Virginia Mining Company, Inc.                                           Virginia

Simba Group, Inc.                                                             Delaware