Document:

<PAGE>
                                                                   EXHIBIT 4.58

                 COAL PURCHASE AND FINANCING AMENDING AGREEMENT

THIS AGREEMENT dated as of the 15th of September, 2004.

BETWEEN:

     PINE VALLEY MINING CORPORATION a company incorporated under the laws of
     British Columbia having its registered office at Suite 3000 -- 1055 West
     Georgia Street Vancouver, BC V6E 3R3 ("PINE VALLEY")

AND:

     FALLS MOUNTAIN COAL INC., a company incorporated under the laws of British
     Columbia having its registered office at Suite 3000 -- 1055 West Georgia
     Street Vancouver, BC V8E 3R3 ("FALLS MOUNTAIN")

AND:

     PINE VALLEY COAL LTD., an Alberta corporation having its principal business
     office at Suite 501 - 535 Thurlow Street, Vancouver, BC V6E 3L2 ("PVC")

AND:

     MARUBENI CORPORATION, a corporation incorporated under the laws of Japan
     and having a business office at 4-2, 1 Chome, Chiyoda-Ku, Tokyo, Japan
     ("MARUBENI")

WHEREAS:

A. Pine Valley, Falls Mountain, PVC and Marubeni are the parties to Coal
Purchase and Financing Agreement dated as of May 18, 2004 (the "CPF Agreement");
and

B. Pine Valley, Falls Mountain, PVC and Marubeni now wish to amend a certain
provision of the CPF Agreement on the basis set out in this Agreement to
accommodate changes in the timing of Draw Requests against the loan facility
that Marubeni has made available to Falls Mountain under the CPF Agreement;

NOW THEREFORE, IN CONSIDERATION of the covenants and agreement; in this
Agreement, the receipt and sufficiency of which is hereby acknowledge and
accepted, the Parties agree as follows:

1.   INTERPRETATION

1.1  DEFINED TERMS

To the extent that it is used herein, the term "Agreement" means this agreement
including any recitals and Schedules to this agreement, as amended. supplemented
or restated from time to time. The capitalized terms used in this Agreement and
not otherwise defined herein will have the meanings given to them in the CPF
Agreement.
<PAGE>
1.2  RULES OF INTERPRETATION

This Agreement and each of the documents contemplated by or delivered under or
in connection with this Agreement will be interpreted in accordance with the
rules of interpretation provided for under the CPF Agreement.

2.   AMENDMENT

Section 7.2 of the CPF Agreement is deleted in its entirety and replaced with
the following:

     7.2  LOAN ADVANCES

     Marubeni will advance US$1,000,000 of the Loan at the Closing and the
     balance of the Loan, from time to time, within three Business Days of the
     receipt by Marubeni of a valid draw request (each a "DRAW REQUEST") from
     Falls Mountain. A valid Draw Request will request funds in multiples of
     US$100,000, be in writing and will Include the following information:

          (a)  the Budget items that Falls Mountain intends to fund with the
               requested funds:

          (b)  the time period over which Falls Mountain expects the requested
               funds will be expended: and

          (c)  confirmation that no Event of Default has occurred and is
               continuing.

     Falls Mountain will not issue a Draw Request unless the Loan proceeds it is
     requesting are reasonably required by the Pine Valley Group fund the
     expenditures contemplated under the Budget during the then-next thirty
     days, including funds required for reasonable corporate overhead expenses
     of the Pine Valley Group. A minimum of US$100,000 of the Loan principal
     will not be subject to a Draw Request and will remain available to be
     advanced until December 31, 2004.

Each of the Parties agrees that the CPF Agreement is in full force and effect,
unamended and unmodified save as amended by this Agreement, and that the CPF
Agreement and this Agreement will henceforth be read together.

3.   GENERAL

3.1  COUNTERPARTS

This Agreement and all documents contemplated by or delivered under or
connection with this Agreement may be executed and delivered in any number of
counterpart is with the same effect as if all Parties had all signed and
delivered the same document and counterparts will be construed together to be an
original and will constitute one and the same agreement.

                                       2
<PAGE>
3.2  DELIVERY BY FAX

Any Party may deliver an executed copy of this Agreement by fax but that Party
will immediately dispatch by delivery in person to the other Parties an
originally executed copy of this Agreement.

IN WITNESS WHEREOF the Parties hereto have executed this Agreement the day and
year first above written.

PINE VALLEY MINING CORPORATION

Per: /s/ Jeffrey M. Fehn
     --------------------------------
     Authorized Signatory
     I have authority to bind
     PINE VALLEY MINING CORPORATION

FALLS MOUNTAIN COAL INC.

Per: /s/ Graham Mackenzie
     --------------------------------
     Authorized Signatory
     I have authority to bind
     FALLS MOUNTAIN COAL INC.

PINE VALLEY COAL LTD.

Per: /s/ Graham Mackenzie
     --------------------------------
     Authorized Signatory
     I have authority to bind
     PINE VALLEY COAL LTD.

MARUBENI CORPORATION

Per: /s/ Hisao Azuma
     --------------------------------
     Authorized Signatory
     I have authority to bind
     MARUBENI CORPORATION

                                       3<PAGE>
                                                                  EXHIBIT 4.59

                          PAYOUT STATEMENT AND RELEASE

IN CONSIDERATION of payment in full by Falls Mountain Coat Inc. ("Falls
Mountain") to Marubeni Corporation ("Marubeni") of the outstanding balance of
the Loan and all Interest accrued thereon and all fees relating to the Loan
payable pursuant to the terms and conditions of the Coal Purchase and Financing
Agreement dated May 18, 2004 among Faits Mountain, Pine Valley Mining
Corporation ("Pine Valley") and Pine Valley Coal Ltd. ("PVC") (Falls Mountain,
Pine Valley and PVC are, collectively, the "Debtors") and Marubeni, as amended
by a Coal Purchase and Financing Amending Agreement dated September 15, 2004
among the same parties (collectively, the "Agreement"), and for other good and
valuable consideration, the receipt and sufficiency of which is hereby
conclusively acknowledged, Marubeni hereby;

1.   confirms that the Loan is the only loan outstanding from Marubeni or
     Marubeni Canada to any of Falls Mountain, Pine Valley and PVC, and confirms
     that as at September 16, 2005, the aggregate outstanding amount of all
     indebtedness of the Debtors to Marubeni relating to the Loan, including the
     principal amount thereof (being US $5,178,697.50), all Interest accrued
     thereon to September 16, 2005 (being US $94,695.88) and the fees relating
     to the Loan payable pursuant to Section 7.4 of the Agreement (being US
     $36,600), Is US $5,309,893.38 (the "Loan Payment"), which Loan Payment
     amount will be adjusted by adding a per diem interest cost of US $1,109.10
     for each day after September 16, 2005 that the Loan Payment remains
     outstanding, until such loan Payment is made in full (which will not
     include a per diem Interest cost for the day on which the Loan Payment is
     made) (collectively, the "Indebtedness");

2.   acknowledges and agrees that the Indebtedness has been paid In full;

3.   releases, surrenders and forever discharges all mortgages, charges,
     pledges, hypothecs, assignments by way of security, liens, security
     Interests or other encumbrances, howsoever created or arising, whether
     absolute or contingent, fixed or floating, perfected or not, that it now
     has in relation to the indebtedness including without Limitation any and
     all security granted in favour of Marubeni by all or any one or more of the
     Debtors, all as described in Schedule A, for the purpose of effectively
     discharging all the property and assets presently charged by Marubeni in
     connection with the Indebtedness with respect to any and all property and
     assets of all or any one or more of the Debtors; and releases, surrenders
     and forever discharges the Debtors front all obligations under the
     Agreement relating to the indebtedness, except that all other provisions of
     the Agreement will remain in full force and effect, including without
     imitation the Purchase Commitment Coal purchase and sale obligations as set
     out in Section 7.7 of the Agreement and the guarantee of Pine Valley as set
     out in Section 10.1 of the Agreement;

4.   agrees that it will from time to time, at the request and for the account
     of any of the Debtors, execute and deliver such certificates, financing
     change statements, discharges, statutory discharges, instruments and other
     documents and shall take and do all other actions, steps and things as may
     be necessary for the purpose of effectively discharging all of the property
     and assets of each of the Debtors from all charges and security interests
     in relation to the indebtedness as set out in Schedule A or for the purpose
     of evidencing, establishing or recording the foregoing release and
     discharge;
<PAGE>
5.   acknowledges that all joint bank accounts referred to in the Agreement (the
     "Joint Accounts") are no longer required, and agrees that it will (or will
     cause Marubeni Canada Ltd. to) from time to time, at the request and for
     the amount of any of the Debtors, execute and deliver such documents and do
     such things as the Debtors may reasonably require in connection therewith,
     including taking such actions as may be necessary to close, or remove its
     representatives as signing officers in connection wk h, such Joint Accounts
     in accordance with the time frame set out below or as otherwise reasonably
     requested by the Debtors; and

6.   acknowledges that the Debtors have executed or will execute a credit
     agreement (the "Credit Agreement") with the Royal Bank of Canada ("RBC")
     and a series of related security documents including but not limited to
     general security agreements (the "Security Documents") In order to
     establish a $20 million revolving credit facility, and hereby waives arty
     default arising under. (a) the Agreement, as a result of the Debtors
     agreeing with RBC under the Credit Agreement to close the Joint Accounts
     within 30 days after the date that the Indebtedness is repaid in full; and
     (b) the security agreement dated May 13, 2004 granted by Falls Mountain and
     PVC in favour of Marubeni, as a result of the execution, delivery and
     performance of the Security Documents and the granting of the security
     interests contemplated thereby.

All capitalized terms referred to herein and not otherwise defined war have the
meaning given to them un the Agreement.

DATED this 15th day of September, 2005.

MARUBENI CORPORATION

Per: /s/ Hisao Azuma
     --------------------------------
     Hisao Azuma
     General Manager
     Coal Dept.

                                        2
<PAGE>
                                   SCHEDULE A

<TABLE>
<CAPTION>
DESCRIPTION OF SECURITY                   REGISTRATION PARTICULARS
-----------------------                   ------------------------
<S>                                       <C>
Security Agreement dated May 13, 2004     Registration pursuant to British
granted by Falls Mountain Coal Inc. and   Columbia PPSA, Base Number 708579B
Pine Valley Coal Ltd. In favour of
Marubeni Corporation                      Registration pursuant to the Alberta
                                          PPSA; Registration Number 04051722785

                                          Registered with the Mineral Titles
                                          Branch, as Event No. 3210481 and Event
                                          No. 3210482, both registered on May
                                          18, 2004, against the Coal Licences
                                          and Coal Leases described in Schedule
                                          "B" to the Security Agreement

Share Pledge Agreement dated May 21,      Registration pursuant to British
2004 made by Pine Valley Mining           Columbia PPBA, Base Registration
Corporation in favour of Marubeni         Number 717542B
Corporation
                                          Registration pursuant to the Alberta
                                          PPSA; Registration Number 04 0 609 21
                                          8 99

                                          Return of Share Certificates in the
                                          capital of Falls Mountain Coal Inc.
                                          represented by Certificate No. 3,
                                          covering 2 common voting shares and
                                          Certificate No. 4 covering 10 common
                                          voting shares
</TABLE>

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