Exhibit No. 10.85

[*] indicates that the confidential portion has been omitted from this filed
exhibit and filed separately with the Securities and Exchange Commission.



                        Underground Coal Sales Agreement
                        --------------------------------

                                      Among

                              San Juan Coal Company
                                       And
                      Public Service Company of New Mexico
                                       And
                          Tucson Electric Power Company




                                Table of Contents

Section 0 - Parties and Recitals.............................................1

Section 1 - Definitions......................................................2
   1.1      Alternate Coal...................................................2
   1.2      Cimarron Coal Assignment.........................................2
   1.3      Coal Leases......................................................2
   1.4      Fruitland Coal Sublease..........................................2
   1.5      Guarantee........................................................2
   1.6      Mineable Coal....................................................2
   1.7      Non-SJCC Coal....................................................3
   1.8      Processed Coal...................................................3
   1.9      Remnant Coal.....................................................3
   1.10     Reserve of Coal..................................................3
   1.11     SJCC Site Area...................................................3
   1.12     San Juan Station.................................................4
   1.13     Ton..............................................................4
   1.14     Ute ROW..........................................................4
   1.15     Definitions of Other Terms.......................................4

Section 2 - Obligations of the Parties and Term of Agreement.................6
   2.1      Obligations of SJCC..............................................6
   2.2      Obligations of Utilities.........................................6
   2.3      Term.............................................................7
   2.4      Conditions Precedent.............................................7
   2.5      Extension........................................................7
   2.6      Representations and Warranties...................................7

Section 3 - Coal Supply......................................................8
   3.1      Ownership of Coal................................................8
   3.2      Alternate Coal...................................................8

Section 4 - Delivery of Coal.................................................9
   4.1      Delivery Points..................................................9
   4.2      Delivery Rates...................................................9
   4.3      Utilities' Coal Storage.........................................10

Section 5 - Coal Specifications and Weighing, Sampling, and Analysis........11
   5.1      Coal Size.......................................................11
   5.2      Coal Quality....................................................11
   5.3      Utilities' Right of Rejection...................................11
   5.4      Weighing and Analysis Facilities and Methods....................12

                                       i


Section 6 - Coal Leases, Land, and Land Rights..............................13
   6.1      Dedicated Reserves..............................................13
   6.2      SJCC's Facilities...............................................13
   6.3      Utilities' Rights Vis-a-Vis the SJCC Site Area..................13
   6.4      Waste Disposal Area.............................................14
   6.5      Compliance with Leases and Other Instruments....................14
   6.6      Restrictions on SJCC............................................15
   6.7      Site Area Lease Management......................................15

Section 7 - Operations......................................................17
   7.1      Mining Plans and Methods........................................17
   7.2      Processing Methods..............................................17
   7.3      Reclamation Activities..........................................17

Section 8 - SJCC Compensation...............................................19
   8.1      Compensation Components.........................................19
   8.2      Mining and Reclamation Component................................19
   8.3      Coal Processing Component.......................................24
   8.4      Non-SJCC Coal and Alternate Coal Costs..........................27
   8.5      Other Costs.....................................................28
   8.6      Inflation - Deflation Adjustment................................29
   8.7      Invoicing and Settlement........................................30

Section 9 - Coordinating Committee..........................................33
   9.1      Purpose.........................................................33
   9.2      Designation.....................................................33
   9.3      Procedures and Practices........................................33
   9.4      Coordinating Committee Decisions................................34
   9.5      Relationship to Joint Committee and Arbitration.................34

Section 10 - Joint Committee................................................35
   10.1     Purpose.........................................................35
   10.2     Designation.....................................................35
   10.3     Authority.......................................................35
   10.4     Decisions by the Joint Committee................................36
   10.5     Relationship to Arbitration.....................................37

Section 11 - Dispute Resolution.............................................38
   11.1     Matters To Be Arbitrated; Notice of Claims and Defenses;
            Party Arbitrator Designation....................................38
   11.2     Arbitrators; Selection of Neutral Arbitrator....................38
   11.3     Arbitration Hearings, Procedures and Timing.....................38
   11.4     Choice of Law...................................................38
   11.5     Award and Enforcement...........................................39
   11.6     Performance Pending Arbitration Decision........................39
   11.7     Definition of "Party" for this Section..........................39

                                       ii


Section 12 - Non-Normal Conditions, Right to Cure, Termination
             and Expiration.................................................40
   12.1     Utilities' Right to Mine........................................40
   12.2     Uncontrollable Forces...........................................40
   12.3     Non-Normal Conditions, Right to Cure, and Offers
            of Non-SJCC Coal................................................40
   12.4     Material Default................................................43
   12.5     Termination.....................................................44
   12.6     Expiration......................................................46

Section 13 - Indemnity......................................................48
   13.1     Indemnity.......................................................48

Section 14 - General Provisions.............................................49
   14.1     Compliance with Applicable Laws.................................49
   14.2     Labor Force.....................................................49
   14.3     Confidentiality / Non-disclosure................................51
   14.4     The Utilities' Duties and Obligations
            Shall be Joint and Several......................................51
   14.5     Permits and Approvals...........................................51
   14.6     Waivers.........................................................51
   14.7     Insurance.......................................................51
   14.8     Notices.........................................................52
   14.9     Choice of Law...................................................53
   14.10    Assignment......................................................53
   14.11    Successors and Assigns..........................................54
   14.12    Authorizations..................................................54
   14.13    Amendments......................................................54
   14.14    Construction....................................................54
   14.15    Entire Agreement................................................54
   14.16    Waiver of Consequential Damages.................................55
   14.17    Severability....................................................55
   14.18    Survival of Provisions..........................................55

Section 15 - Signatures.....................................................56

                             Exhibits and Attachment
   Attachment "1" Guarantee

   Exhibit "A"             Coal Leases

   Exhibit "B"             Delivery Points

   Exhibit "C"             Mining Plans and Methods

   Exhibit "D"             Delivery Rates

   Exhibit "E"             SJCC Site Area

   Exhibit "F"             Operating Costs

   Exhibit "G"             Tax Calculations

   Exhibit "H"             San Juan Station Minimum Deliveries 2003-2017

                                      iii



                        Section 0 - Parties and Recitals
                        --------------------------------

THIS AGREEMENT ("Agreement") is dated August 31, 2001, to become effective on
January 1, 2003, as provided herein, between SAN JUAN COAL COMPANY, a Delaware
corporation ("SJCC"), and PUBLIC SERVICE COMPANY OF NEW MEXICO, a New Mexico
corporation, and TUCSON ELECTRIC POWER COMPANY, an Arizona corporation (herein
collectively referred to as "Utilities"), (with SJCC and Utilities herein
sometimes collectively referred to as "Parties").

WHEREAS, SJCC has acquired coal leases and surface rights known as the Coal
Leases which are more particularly described in Exhibit "A" "Coal Leases";

WHEREAS, Utilities own, in part, a coal-burning power plant in the vicinity of
the Coal Leases (hereinafter referred to as the "San Juan Station");

WHEREAS, the San Juan Station currently consists of four generating units (as
hereinafter defined);

WHEREAS, Utilities desire to have SJCC sell Utilities coal that has been mined
from an underground coal mine (the "UG Mine") on the Coal Leases and delivered
to the delivery point(s) shown on Exhibit "B" "Delivery Points" and SJCC is
willing to undertake such obligation upon the terms and conditions hereinafter
set forth, and;

WHEREAS, the purpose of this Agreement is to set forth the agreement between the
Parties relating to the supply of coal by SJCC to the San Juan Station.

NOW, THEREFORE, in consideration of the terms, covenants and agreements
contained in this Agreement, Utilities jointly and severally agree with SJCC as
follows:

                                       1


                            Section 1 - Definitions
                            -----------------------

         When used in this Agreement, the terms defined in this Section 1 shall
         have the following meanings.

1.1      Alternate Coal
         "Alternate Coal" shall mean coal other than Mineable Coal or Non-SJCC
         Coal that is acquired pursuant to Section 3.2 "Alternate Coal" that
         meets the following criteria:

         A)       It has been approved by the Joint Committee for processing and
                  delivery or inclusion in the Reserve of Coal;

         B)       It is reasonable to expect that it can be processed to meet
                  the Coal Quality and Coal Size requirements described in
                  Section 5 "Coal Specifications and Weighing, Sampling, and
                  Analysis";

         C)       It has been severed from sources other than the Coal Leases;
                  and,

         D)       It may be intended for short-term supply.

1.2      Cimarron Coal Assignment
         "Cimarron Coal Assignment" shall mean that particular Assignment
         Agreement, dated October 30, 1979, originally between Cimarron Coal
         Company and Western Coal Company and assigned to SJCC, as amended and
         modified.

1.3      Coal Leases
         "Coal Leases" shall refer to those certain coal leases (some whole coal
         leases and some portions of other coal leases) which are described in
         Exhibit "A" "Coal Leases".

1.4      Fruitland Coal Sublease
         "Fruitland Coal Sublease" shall mean that particular Sublease dated
         August 18, 1980, between Western Coal Company as Sublessor and Utah
         International Inc. as Sublessee.

1.5      Guarantee
         "Guarantee" shall mean the Guarantee, of even date herewith, made by
         BHP Minerals International Inc. and guaranteeing to Utilities SJCC's
         performance of its obligations hereunder.

1.6      Mineable Coal
         "Mineable Coal" shall mean that coal which is Remnant Coal or meets the
         following four criteria:

         A)       Is within the Coal Leases (as herein defined);

         B)       Can reasonably be expected to be mined utilizing the Mining
                  Plans and Methods herein defined;

         C)       Can reasonably be expected to meet the heating value
                  specifications described in Section 5.2 "Coal Quality" (unless
                  the Utilities' Coordinating Committee representative agrees
                  that a lower heating value is acceptable); and,

                                       2


         D)       Is contained in the Number 8 coal seam referenced in Exhibit
                  "C" "Mining Plans and Methods" and is at least the thickness
                  of the minimum operating height of the longwall shearer,
                  excluding local anomalies.

1.7      Non-SJCC Coal
         "Non-SJCC Coal" shall mean coal that is offered to Utilities pursuant
         to Section 12.3 "Non-Normal Conditions, Right to Cure, and Offers of
         Non-SJCC Coal" and meets the following criteria:

         A)       It has been approved by the Joint Committee for processing and
                  delivery or inclusion in the Reserve of Coal;

         B)       It is reasonable to expect that it can be processed to meet
                  the Coal Quality and Coal Size requirements described in
                  Section 5 "Coal Specifications and Weighing, Sampling, and
                  Analysis";

         C)       It has been severed from sources other than the Coal Leases;
                  and,

         D)       It is intended for short-term supply.

1.8      Processed Coal
         "Processed Coal" shall mean coal that has been processed according to
         Section 7.2 "Processing Methods".

1.9      Remnant Coal
         "Remnant Coal" shall mean coal uncovered by SJCC at its discretion
         utilizing mining methods other than the Mining Plans and Methods
         described herein from coal leases on the SJCC Site Area before January
         1, 2004, and that was not bought out by the Utilities pursuant to the
         Coal Sales Agreement Buy Out Agreement of even date herewith.

1.10     Reserve of Coal
         "Reserve of Coal" shall mean all Mineable Coal, Non-SJCC Coal, and
         Alternate Coal on the SJCC Site Area that is mined coal in storage or
         un-mined coal from which the overburden has been removed.

1.11     SJCC Site Area
         "SJCC Site Area" is identified in Exhibit "E" "SJCC Site Area" and
         includes the following:

         A)       Coal Leases as described in Exhibit "A" "Coal Leases".

         B)       San Juan Mine and facilities including coal receiving,
                  handling, delivery, and crushing facilities, coal weighing and
                  sampling facilities, service road, maintenance and office
                  buildings, fencing and auxiliary facilities.

         C)       La Plata Mine and facilities including coal weighing
                  facilities, service road, maintenance and office buildings,
                  fencing and auxiliary facilities.

         D)       Transportation Corridor facilities including the haul road,
                  water system, fencing and auxiliary facilities.

                                       3


1.12     San Juan Station
         That certain coal-fired power plant currently operated by Public
         Service Company of New Mexico and owned, in part, by Utilities,
         presently consisting of four generating units. The First Unit has a net
         rated capacity of approximately 327,000 kW. The Second Unit has a net
         rated capacity of approximately 316,000 kW. The Third Unit has a net
         rated capacity of approximately 497,000 kW. The Fourth Unit has a net
         rated capacity of approximately 507,000 kW.

1.13     Ton
         Equal to 2,000 pounds and the same as a short ton when used herein.

1.14     Ute ROW
         "Ute ROW" shall mean that particular right of way agreement dated July
         29, 1981, between Western Coal Company (which interest has been
         assigned to SJCC) and the Ute Mountain Ute Tribe of the Ute Mountain
         Ute Reservation, as amended.

1.15     Definitions of Other Terms
         Definitions of terms used predominantly in Section 8, appear in Section
         8.2(F) "Definitions". Definitions of other terms appear elsewhere
         throughout this Agreement. These include:

         A)       "Administration Element", defined in Section 8.2(D);

         B)       "Agreement", defined in Section 0;

         C)       "Annual CIE Amount", defined in Section 8.2(E);

         D)       "Annual Processing Tons", defined in Section 8.3(A)(5);

         E)       "Base CIE Amount", defined in Section 8.2;

         F)       "Base CIEOriginal", defined in Section 8.2(A)(1);

         G)       "Base CIEtax adj.", defined in Section 8.2(A)(1);

         H)       "Base CIEtrue up adj.", defined in Section 8.2(A)(1);

         I)       "BMT", defined in Section 8.2(A)(3);

         J)       "CIE Reconciliation Amount", defined in Section 8.2;

         K)       "Coal Costs", defined in Section 8.1;

         L)       "Cure Plan", defined in Section 12.3(E)(1);

         M)       "Deflator", defined in Section 8.6(A);

         N)       "Delivery Points", defined in Section 4.1(A);

         O)       "Depletion-eligible Reimbursable SJCC Coal Processing Costs",
                  defined in Section 8.3(B)(2);

         P)       "Depletion-ineligible Reimbursable SJCC Coal Processing Costs"
                  defined in Section 8.3(B)(3);

                                       4


         Q)       "Eligible Processing Administration Element", defined in
                  Section 8.3(C)(1);

         R)       "Emergency Situation", defined in Section 12.1(A);

         S)       "IMT", defined in Section 8.2(B)(3);

         T)       "Incremental CIE Amount", defined in Section 8.2;

         U)       "Index", defined in Section 8.6(A);

         V)       "Inferior Coal", defined in Section 5.3;

         W)       "Inflation Index", defined in Section 8.6(A);

         X)       "Material Default Conditions", defined in Section 12.3;

         Y)       "Monthly Eligible Processing Tons", defined in Section
                  8.3(A)(5);

         Z)       "Monthly Non-Eligible Processing Tons", defined in Section
                  8.3(A)(5);

         AA)      "Monthly Processing Tons", defined in Section 8.3(A)(5);

         BB)      "NBMT", defined in Section 8.2(A)(3);

         CC)      "NIMT", defined in Section 8.2(B)(3);

         DD)      "Non-Eligible Processing Administration Element", defined in
                  Section 8.3(C)(2);

         EE)      "Processing Administration Element", defined in Section
                  8.3(C);

         FF)      "Processing CIE Amount", defined in Section 8.3;

         GG)      "Processing CIE Reconciliation Amount", defined in Section
                  8.3;

         HH)      "Processing CIEEligible", defined in Section 8.3(A)(2);

         II)      "Processing CIEEligible-Adj", defined in Section 8.3(A)(3);

         JJ)      "Processing CIEEligible-Org", defined in Section 8.3(A)(1);

         KK)      "Processing CIENon-eligible", defined in Section 8.3(A)(2);

         LL)      "Processing CIENon-elg-Adj.", defined in Section 8.3(A)(3);

         MM)      "Processing CIENon-elg-Org", defined in Section 8.3(A)(2);

         NN)      "Reimbursable Operating Costs", defined in Section 8.2;

         OO)      "Reimbursable Processing Costs", defined in Section 8.3;

         PP)      "Uncontrollable Forces" is defined in Section 12.2;

         QQ)      "Utilities' Coal Storage", defined in Section 4.2(B); and,

         RR)      "Waste", defined in Section 6.4.

                                       5


          Section 2 - Obligations of the Parties and Term of Agreement
          ------------------------------------------------------------

2.1      Obligations of SJCC

         Pursuant to the provisions of this Agreement, the obligations of SJCC
         include:

         A)       To produce Mineable Coal from the Coal Leases,

         B)       To process and crush Mineable Coal, Non-SJCC Coal and/or
                  Alternate Coal in the facilities of SJCC to a size and quality
                  specified in Sections 5.1 "Coal Size" and Section 5.2 "Coal
                  Quality",

         C)       To deliver and sell, at the request of Utilities, Processed
                  Coal to Utilities at the Delivery Point(s) as defined in
                  Section 4.1 "Delivery Points" and at the Delivery Rates as
                  defined in Section 4.2 "Delivery Rates", and,

         D)       To perform reclamation activities on the SJCC Site Area.

         SJCC recognizes that Utilities are relying on SJCC to perform all of
         its obligations hereunder in order for Utilities to operate the San
         Juan Station and that Utilities' access to other sources of fuel for
         the San Juan Station is limited. SJCC, therefore, agrees to accept full
         responsibility for delivery of Processed Coal to the San Juan Station
         in accordance with Section 4 "Delivery of Coal". SJCC further
         acknowledges that Utilities are relying on the Mining Plans and Methods
         to recover coal and that SJCC has designed its Mining Plans and Methods
         to:

                  1)   Maximize recovery of Mineable Coal, subject to good
                       minerlike practices and to the terms of the Coal Leases;
                       and

                  2)   Efficiently and economically mine and deliver coal to
                       Utilities.

         SJCC will exercise good faith efforts to achieve two (2) consecutive
         months of Mineable Coal production equivalent to 550,000 Tons per month
         from the UG Mine on or before December 31, 2002.

2.2      Obligations of Utilities
         Pursuant to the provisions of this Agreement, the obligations of
         Utilities include:

         A)       To purchase all coal required for the operation of the San
                  Juan Station from SJCC subject to the provisions of and
                  consistent with the terms of this Agreement; provided however,
                  that Utilities may during periods, if any, when SJCC may be
                  unable, whether due to Uncontrollable Forces or otherwise, to
                  furnish coal to the Delivery Point(s), obtain coal from other
                  sources to maintain and protect full capacity operation of the
                  San Juan Station,

         B)       To compensate SJCC for all reclamation activity, including
                  ongoing and post term reclamation of the SJCC Site Area
                  pursuant to Section 7.3 "Reclamation Activities"; and

         C)       To make payments as specified in Section 8 "SJCC
                  Compensation".

                                       6


2.3      Term
         This Agreement shall expire December 31, 2017, unless such term is
         extended by mutual written agreement of the Parties.

2.4      Conditions Precedent
         The conditions precedent to this Agreement becoming effective on
         January 1, 2003, are:

         A)       The final approval of this Agreement by the San Juan Fuels
                  Committee pursuant to the requirements of the San Juan Project
                  Participation Agreement dated as of October 27, 1999, to be
                  obtained no later than September 28, 2001, and written
                  notification of such approval to SJCC by the Utilities.

         B)       The final approval of the Capital True Up Agreement by the San
                  Juan Fuels Committee pursuant to the requirements of the San
                  Juan Project Participation Agreement dated as of October 27,
                  1999, to be obtained no later than September 28, 2001, and
                  written notification of such approval to SJCC by the
                  Utilities.

         C)       Execution of the Guarantee by the Guarantor in the form
                  attached to this Agreement and incorporated herein as
                  Attachment 1, to be obtained no later than September 28, 2001,
                  and provided to Utilities by SJCC.

2.5      Extension
         Utilities may, by written notice to SJCC given on or before December
         31, 2007, indicate their intent to extend the term of this Agreement
         for an additional period of not less than five (5) years. If such
         notice is given, SJCC and Utilities shall negotiate diligently and in
         good faith to reach agreement on such extension. If the Parties have
         not agreed to an extension prior to the expiration of the initial term
         of this Agreement, or such other date as they may establish, this
         Agreement shall terminate as provided for herein.

2.6      Representations and Warranties
         As of the execution of this Agreement and subject to satisfaction of
         the applicable conditions precedent described in this Agreement, each
         party warrants and represents that:

         A)       It is a corporation duly organized and in good standing in its
                  state of incorporation and is qualified to do business and is
                  in good standing in those states where necessary in order to
                  carry out the purposes of this Agreement;

         B)       It has the capacity to enter into and perform this Agreement
                  and all transactions contemplated in this Agreement, and that
                  all corporate actions required to authorize it to enter into
                  and perform this Agreement have been taken properly; and

         C)       This Agreement has been duly executed and delivered by it and
                  is valid and binding upon it in accordance with its terms.

                                       7


                            Section 3 - Coal Supply
                            -----------------------

3.1      Ownership of Coal
         All coal contained in the Coal Leases, Reserve of Coal, and Remnant
         Coal shall at all times be and remain the property of SJCC (subject in
         the case of coal contained in the Fruitland Coal Sublease to certain
         security interests therein retained by other parties). Once said coal
         is delivered to Utilities pursuant to Section 4.1 "Delivery Points",
         title thereto shall pass to Utilities free and clear of all claims,
         liens and encumbrances.

3.2      Alternate Coal
         A)       In the event that during the Term of this Agreement

                  1)   the Joint Committee concludes that SJCC may be able to
                       deliver Alternate Coal to Utilities with an acquisition
                       cost that is less than the Reimbursable Operating Costs
                       as defined in Section 8.2(C) "Reimbursable Operating
                       Costs" for Mineable Coal or,

                  2)   if the Parties agree that Alternate Coal should otherwise
                       be substituted for Mineable Coal,

         then, subject to final Joint Committee approval, SJCC shall use its
         best efforts to acquire Alternate Coal for delivery under this
         Agreement and to substitute such Alternate Coal for that amount of
         Mineable Coal otherwise deliverable hereunder which the Joint Committee
         or the Parties (as the case may be) have agreed upon; provided that,
         such Alternate Coal shall be priced as described in Section 8 "SJCC
         Compensation" including a Base CIE or an Incremental CIE, as
         applicable, and full reimbursement of acquisition costs, and any
         Operating Costs as defined in Exhibit "F" "Operating Costs" adjusted
         for depletion if appropriate, and shall meet the specifications
         identified in Section 5 "Coal Specifications and Weighing, Sampling,
         and Analysis" or such specifications as shall be agreed upon by
         Utilities.

                                       8


                          Section 4 - Delivery of Coal
                          ----------------------------

4.1      Delivery Points
         A)       SJCC will deliver Processed Coal to delivery point(s) on the
                  San Juan Station situated in the location(s) shown as
                  "Delivery Points" on Exhibit "B" "Delivery Points".

         B)       Processed Coal shall be deemed delivered when it is deposited
                  in one of the Utilities' coal surge piles at the Delivery
                  Point(s), and title shall pass to Utilities at the point of
                  entry into said coal surge piles; thereafter, Utilities shall
                  be responsible for all such delivered coal.

         C)       Matters of mutual interest in connection with the coal
                  handling facilities, and specific methods and locations of
                  delivery are hereby made a responsibility of the Coordinating
                  Committee, such responsibility to be carried out as provided
                  for in Section 9 "Coordinating Committee".

4.2      Delivery Rates
         A)       SJCC shall deliver coal to the Utilities at the Delivery
                  Point(s) pursuant to Sections 4.2(B) and 4.2(C) hereof, such
                  deliveries, to the extent practicable, to be at approximate
                  uniform rates during the delivery periods and in annual
                  amounts as shown in Exhibit "D" "Delivery Rates" as may be
                  adjusted; provided, however, that in no event shall SJCC at
                  any time be obligated to mine coal in a manner inconsistent
                  with the Mining Plans and Methods. The annual amounts shown in
                  Exhibit "D" "Delivery Rates" will be adjusted as provided for
                  in Sections 4.2(B) and 4.2(C); provided, however, that such
                  amounts may not be adjusted upward to exceed 130,000 Tons per
                  week or 6,760,000 Tons per year, unless otherwise agreed to by
                  the Joint Committee.

         B)       During the term of this Agreement, Utilities will provide SJCC
                  annually, on or about September 1st, a schedule of monthly and
                  annual planned coal consumption for operation of the San Juan
                  Station and for Utilities' Coal Storage (defined in Section
                  4.3 "Utilities' Coal Storage"). This annual consumption
                  forecast provided by the Utilities will supercede the tonnage
                  specified in Exhibit "D" "Delivery Rates" for that year, if
                  the annual schedule is consistent with the provisions of
                  Section 4.2(A). Utilities will notify SJCC promptly and, if
                  possible, in advance, of any changes in such scheduled amounts
                  due to outage of generating units or other causes. In the
                  event of an increase in said scheduled amounts upon less than
                  eight (8) weeks' notice, SJCC agrees to use its best efforts
                  to meet such increase at the date scheduled, and in any event,
                  subject to the limitations of Section 4.2(A), it will meet
                  such increase within eight (8) weeks of notice thereof.

         C)       The Joint Committee may, in accordance with the provisions of
                  Section 10 "Joint Committee", adjust either upward or downward
                  the tonnage specified in this Section 4.2 "Delivery Rates",
                  provided such adjustment is not in conflict with any other
                  provision of this Agreement and does not materially impact the
                  Mining Plans and Methods.

                                       9


4.3      Utilities' Coal Storage
         Utilities intend to maintain at the San Juan Station site a storage
         pile of Processed Coal ("Utilities' Coal Storage"). The amount of such
         storage will be determined by Utilities from time to time in the future
         and may be varied from time to time. Should any part of this coal
         storage pile be depleted or should the size of the pile be increased as
         provided for herein, subject to the limitations on SJCC's delivery
         obligations contained herein, SJCC agrees to deliver replacement or
         additional coal at the earliest practicable time in order that the
         amount of coal will reach the required level, as determined by the
         Utilities and consistent with this Agreement. Delivery of Processed
         Coal for Utilities' Coal Storage will not be required if such delivery
         would trigger Non-Normal Conditions.

                                       10


      Section 5 - Coal Specifications and Weighing, Sampling, and Analysis
      --------------------------------------------------------------------

5.1      Coal Size
         Crusher settings will be established by the Coordinating Committee. No
         selected sizes shall be removed from the Processed Coal.

5.2      Coal Quality
         Coal to be delivered pursuant to this Agreement shall have been mined
         with diligence and care, and in accordance with good minerlike
         practice, to minimize contamination of coal by material extraneous to
         the coal seam being mined. Subject to the provisions of this Section 5
         and Section 12 "Non-Normal Conditions, Right to Cure, Termination, and
         Expiration", SJCC will deliver to Utilities coal which shall have an
         average heating value of not less than 9,000 BTU per pound, as
         received, averaged over any 24-hour period when SJCC is delivering
         coal, unless a variance from such standard shall have previously been
         agreed upon by the Coordinating Committee in accordance with Section 9
         "Coordinating Committee". Such 24-hour period shall be from midnight to
         midnight, unless the Coordinating Committee shall agree otherwise in
         accordance with Section 9 "Coordinating Committee"

5.3      Utilities' Right of Rejection
         Subject to the provisions of Section 12 "Non-Normal Conditions, Right
         to Cure, Termination and Expiration", in the event that coal delivered
         during any 24-hour period referred to in Section 5.2 "Coal Quality"
         shall have an average heating value of less than 9,000 BTU per pound,
         as received, ("Inferior Coal") and such delivery shall not have been
         authorized by prior agreement of the Utilities' Coordinating Committee
         Representative or the Joint Committee, then SJCC shall give the
         Utilities prompt notice of the delivery of such Inferior Coal, and the
         Utilities may then choose either one of the two options described below
         and promptly notify SJCC of such decision. Such election shall
         constitute an exclusive remedy for delivery of Inferior Coal, unless a
         dispute arises under Section 5.3(A) or Section 5.3(B), in which case
         either party may demand arbitration pursuant to Section 11 "Dispute
         Resolution".

         A)       If the Utilities choose to accept the Inferior Coal, they may
                  request a price reduction for such Inferior Coal. Such price
                  reduction shall be determined by the following formula and
                  credited against the Interim Invoice and the UG-CSA Invoice
                  for the month that the Inferior Coal was delivered:

                  Price Reduction = 24-hour Tons X price X grade factor

                  Where:

                  "24-hour Tons" is equal to the Tons of coal sold in the
                  24-hour period in which the Inferior Coal was delivered;

                  "price" is equal to the UG-CSA Invoice price for the month in
                  which the Inferior Coal was delivered; and,


                                       11


                  "grade factor" is equal to the [the contract grade minus the
                  grade of the Inferior Coal for the 24-hour period] divided by
                  the contract grade. The contract grade is 9,000 BTU per pound
                  or as otherwise agreed by the Coordinating Committee.

         B)       If the Utilities choose to reject such Inferior Coal, the
                  Coordinating Committee shall develop a plan to mitigate the
                  situation. SJCC at its own expense will use reasonable efforts
                  to implement the mitigation measures.

5.4      Weighing and Analysis Facilities and Methods
         Facilities for the weighing, sampling and analysis of coal shall be
         owned, operated and maintained by SJCC.

         A)       Methods shall be established for determining the weight and
                  BTU content of coal delivered, in accordance with accepted
                  good practice and applicable portions of the ASTM standards,
                  or such other procedures as the Coordinating Committee may
                  determine with due regard for overall economy in investment
                  and in operation, including splitting of samples and bias
                  testing by an independent commercial firm qualified to conduct
                  such testing.

         B)       Utilities may at any time observe the weighing, sampling and
                  analysis operations of SJCC as herein provided and report
                  thereon to the Coordinating Committee.

                                       12


                 Section 6 - Coal Leases, Land, and Land Rights
                 ----------------------------------------------

6.1      Dedicated Reserves
         The coal reserves contained within the Coal Leases are dedicated to
         production for the San Juan Station except as provided otherwise
         herein.

         Before SJCC acquires any coal leases contiguous with the Coal Leases,
         SJCC will offer to dedicate such coal leases to production for the San
         Juan Station. Upon approval (which approval shall not be withheld
         unreasonably) by the Joint Committee of the terms for incorporating
         such leases into this Agreement, those coal leases if acquired, will
         become dedicated to production for the San Juan Station except as
         provided otherwise herein.

6.2      SJCC's Facilities
         A)       SJCC has, or will use its best efforts to further secure by
                  January 1, 2003, right of use of the SJCC Site Area, either by
                  right, deed, lease, or other instrument.

         B)       It is understood that the boundaries of the SJCC Site Area
                  that are adjacent to the San Juan Station may, with the
                  consent of Utilities, be enlarged as SJCC's needs expand. Any
                  such enlargement shall be a responsibility of the Joint
                  Committee, to be carried out as provided for in Section 10
                  "Joint Committee".

         C)       Utilities hereby agree that as among Utilities and SJCC and
                  their respective successors and assigns, the coal mining, coal
                  processing and mining reclamation equipment and related assets
                  owned by SJCC and located on the San Juan Station site are and
                  shall remain personal property of SJCC. Utilities agree to
                  grant to any purchaser of such equipment and assets from SJCC
                  such easements and rights-of-way as shall be necessary to
                  enable such purchaser to enter upon the lands of Utilities to
                  remove same.

6.3      Utilities' Rights Vis-a-Vis the SJCC Site Area
         A)       In the event that Utilities-authorized persons wish to enter
                  the SJCC Site Area, Utilities shall first give notice to the
                  mine manager, or his representative, or follow Coordinating
                  Committee guidelines in order to facilitate compliance with
                  safety requirements.

         B)       SJCC grants to Utilities such rights as SJCC may have to
                  install, maintain and operate and the right to permit others,
                  including but not limited to affiliated companies of the
                  Utilities, to install, maintain and operate roads, railroads,
                  overland conveyors, electric power-lines, water pipelines and
                  other facilities over and upon the SJCC Site Area; provided,
                  however, that such installation, maintenance and operation
                  shall not interfere with SJCC's operations and obligations
                  under this Agreement and provided further that such activity
                  shall comply with applicable law and lease terms.

                                       13


6.4      Waste Disposal Area
         In connection with the Waste Disposal Agreement dated July 27, 1992, as
         amended, SJCC will maintain, to the extent permitted by, and in
         compliance with, applicable laws, regulations and permits, suitable
         waste disposal areas within the SJCC Site Area. "Waste" shall be
         defined as material disposed of pursuant to the Waste Disposal
         Agreement.

6.5      Compliance with Leases and Other Instruments
         A)       SJCC shall not perform any act or undertake any activity which
                  would violate any covenant under any of the Coal Leases or
                  other leases, rights of way grants and easements, or other
                  agreements, licenses or permits required for the mining,
                  processing, transportation, delivery and sale of coal, Waste
                  disposal, reclamation, and other activities of SJCC under this
                  Agreement, and which could have the effect of causing
                  forfeiture of SJCC's rights under said leases and other
                  instruments, including nonpayment of rentals or royalties due
                  under the provisions of such leases and instruments.

         B)       In the event that any regulatory requirement shall impose upon
                  SJCC an obligation to produce coal in an amount which cannot
                  be produced using the Mining Plans and Methods, then the Joint
                  Committee shall approve such changes to the Mining Plans and
                  Methods as are reasonably required to enable SJCC to comply
                  with such obligation and the Utilities' representatives on the
                  Joint Committee shall not unreasonably withhold their approval
                  of such changes.

         C)       It is agreed that, in the event there is attached to SJCC's
                  interest in the Coal Leases or other leases, rights of way
                  grants and easements, or other agreements, licenses or permits
                  required for the mining, processing, transportation, delivery
                  and sale of coal, Waste disposal, reclamation, and other
                  activities of SJCC under this Agreement, a judgment lien
                  against SJCC resulting from a final judgment issued by any
                  court of competent jurisdiction, which judgment is not
                  appealable to any court, or a lien created by statute, which
                  statutory lien is not being contested by SJCC and which SJCC
                  does not intend to contest, and legal procedure has been
                  commenced for the sale of SJCC's interest in the Coal Leases
                  or other leases, rights of way grants and easements, or other
                  agreements, licenses or permits required for the mining,
                  processing, transportation, delivery and sale of coal, Waste
                  disposal, reclamation, and other activities of SJCC under this
                  Agreement, pursuant to such judgment, lien or statutory lien,
                  Utilities, after giving SJCC written demand to pay such
                  judgment or discharge such lien and SJCC having failed to do
                  so within a reasonable time after such demand, shall have the
                  right at their option to pay and discharge said judgment or
                  lien prior to such sale or to redeem the Coal Leases or other

                                       14


                  leases, rights of way grants and easements, or other
                  agreements, licenses or permits required for the mining,
                  processing, transportation, delivery and sale of coal, Waste
                  disposal, reclamation, and other activities of SJCC under this
                  Agreement, after such sale as provided by law, in which event
                  all sums expended by Utilities to discharge said lien or to
                  redeem said property, as provided by law, shall be payable by
                  SJCC to Utilities upon demand.

6.6      Restrictions on SJCC
         A)       Subject to Section 6.7 "Site Area Lease Management", SJCC
                  shall not assign, transfer, convey, mortgage, encumber or
                  otherwise dispose of interests or rights in the Coal Leases or
                  other leases, rights of way grants and easements, or other
                  agreements, licenses or permits required for the mining,
                  processing, transportation, delivery and sale of coal, Waste
                  disposal, reclamation, and other activities of SJCC under this
                  Agreement, except as contemplated by Section 14.10
                  "Assignment", without the prior written consent of Utilities.
                  SJCC may sell to parties other than Utilities, coal mined from
                  the Coal Leases and any approved contiguous lease additions
                  which is not required by SJCC to meet its obligations
                  hereunder and SJCC shall have no liability to Utilities by
                  reason of such sale; provided, however, that no said sale
                  shall be made without the prior written consent of the
                  Utilities' representatives on the Joint Committee.

         B)       Notwithstanding the foregoing provisions of this Section 6.6,
                  if for a period of thirty-six (36) consecutive months,
                  Utilities shall be entirely excused pursuant to the provisions
                  of Section 12.2 "Uncontrollable Forces" hereof from their
                  obligation to accept deliveries of and to pay for coal from
                  the Coal Leases, then SJCC shall attempt to sell coal from the
                  Coal Leases to persons other than Utilities. Utilities agree
                  that they will consent to such sales

                  1)   if such sales will not, in Utilities' reasonable
                       judgment, interfere with the provision of the then
                       anticipated annual and total estimated fuel needs of the
                       San Juan Station, but not to exceed the tonnage specified
                       in Section 4.2 "Delivery Rates", through the remaining
                       Term (unless otherwise agreed by the Parties), and

                  2)   appropriate amendments are made to the components of
                       compensation set forth in Section 8 "SJCC Compensation"
                       to reflect the decreased tonnage of coal that will be
                       delivered to Utilities from the Coal Leases.

                  To the extent necessary to maintain the Coal Leases by
                  production, SJCC may sell coal from the Coal Leases to persons
                  other than Utilities during the thirty-six (36) month period.

         C)       Except for incidental uses, SJCC will use underground
                  facilities within the UG Mine solely to meet SJCC's
                  obligations under this Agreement.

6.7      Site Area Lease Management
         SJCC shall have the responsibility and authority to manage all leases,
         rights of way grants and easements, or other agreements, licenses or
         permits for the SJCC Site Area. Management of the Coal Leases and other
         areas required for the mining, processing, transportation, delivery,
         Waste disposal, reclamation, and sale of coal pursuant to this
         Agreement is restricted pursuant to Section 6.6 "Restrictions on SJCC".

                                       15


                             Section 7 - Operations
                             ----------------------

7.1      Mining Plans and Methods
         A)       SJCC will mine and deliver coal in accordance with the mining
                  methods set forth in Exhibit "C" "Mining Plans and Methods"
                  incorporated herein by reference. To mine Remnant Coal, SJCC
                  at its discretion may use mining methods other than those
                  described in Exhibit "C" "Mining Plans and Methods". SJCC
                  agrees that it will not significantly amend, revise or modify
                  the Mining Plans and Methods, unless necessary to comply with
                  applicable statutes, regulations and rulings, without first
                  gaining Joint Committee approval if the effect of such
                  amendment, revision or modification would be to increase the
                  cost of coal sold to the Utilities or significantly reduce the
                  recoverable reserves hereunder.

         B)       Power System - SJCC shall provide or contract for its electric
                  power requirements for mining by separate agreement.

7.2      Processing Methods
         A)       SJCC shall process Mineable Coal, Alternate Coal, and/or
                  Non-SJCC Coal in its facilities in accordance with accepted
                  coal processing methods to meet Section 5.1 "Coal Size" and
                  Section 5.2 "Coal Quality" requirements.

         B)       Power System - SJCC shall provide or contract for its electric
                  power requirements for processing by separate agreement.

7.3      Reclamation Activities
         A)       SJCC will reclaim lands on the SJCC Site Area as required by
                  and in compliance with all applicable laws, regulations and
                  conditions of applicable permits, licenses and approvals.
                  Utilities will compensate SJCC for all reclamation and related
                  liabilities, obligations and costs associated with disturbance
                  on the SJCC Site Area resulting in any way from the supply of
                  coal to the San Juan Station; provided, however, that the
                  Utilities' reclamation liability after any termination (but
                  not expiration) is further limited to surface reclamation and
                  related liabilities, obligations and costs, as more
                  specifically provided in Section 12.5(D) "Liabilities Upon
                  Termination".

         B)       Post Term Reclamation - At a time designated by the Joint
                  Committee, which in any event shall be no later than ten (10)
                  years prior to expiration of this Agreement, Utilities agree
                  to make arrangements, acceptable to SJCC to assure that
                  Utilities' obligation to fully compensate SJCC for all
                  reclamation obligations of SJCC for all of the SJCC Site Area
                  will be satisfied. Unless otherwise agreed, such assurance
                  shall include at least one or more of the following: bonding
                  or other financial assurance, or funding of a secure
                  reclamation account. SJCC's acceptance of such assurance shall
                  not be unreasonably withheld.

                                       16


         C)       Regulatory Costs - If SJCC is required by the provisions of
                  agreements relating to the SJCC Site Area, or any regulations
                  or directives issued pursuant thereto, or by the provisions of
                  any statute, ordinance, regulation or other directive of any
                  governmental body to undertake any reclamation, environmental
                  protection or related work, compensation for which would not
                  be covered under the provisions of Section 8 "SJCC
                  Compensation", SJCC shall receive compensation from Utilities
                  for complying with such reclamation, environmental protection
                  or related work consistent with the compensation provisions of
                  Section 8 "SJCC Compensation" to the extent that such activity
                  is associated with disturbance on the SJCC Site Area resulting
                  in any way from the supply of coal to the San Juan Station;
                  provided, however, that the Utilities' liability for such work
                  after any termination (but not expiration) is further limited
                  to work related to surface mining and the surface effects of
                  underground mining. The procedures for determining such
                  compensation shall be agreed to by the Parties.

                                       17


                         Section 8 - SJCC Compensation
                         -----------------------------

8.1      Compensation Components
         The Utilities shall pay to SJCC the sales price for coal delivered to
         Utilities ("Coal Costs"), and in addition shall reimburse SJCC for
         Other Costs as described in Section 8.5 "Other Costs".

         The Coal Costs to be paid by the Utilities is comprised of the
         following components:

         A)       The Mining and Reclamation Component as described in Section
                  8.2 "Mining and Reclamation Component".

         B)       The Coal Processing Component as described in Section 8.3
                  "Coal Processing Component".

         C)       Non-SJCC Coal and Alternate Coal Costs as described in Section
                  8.4 "Non-SJCC Coal and Alternate Coal Costs".

8.2      Mining and Reclamation Component
         The Mining and Reclamation Component shall be the sum of the Base
         Capital Investment Element Amount ("Base CIE Amount") as described in
         Section 8.2(A), the Incremental Capital Investment Element Amount
         ("Incremental CIE Amount") as described in Section 8.2(B), SJCC's
         Reimbursable Operating Costs ("Reimbursable Operating Costs") as
         described in Section 8.2(C), the Administration Element as described in
         Section 8.2(D), and the Capital Investment Element Reconciliation
         Amount ("CIE Reconciliation Amount") as described in Section 8.2(E).

         A)       Base CIE Amount

         Each month, Utilities shall pay to SJCC a base capital investment
         element that will be calculated and adjusted as herein provided. All
         adjustment results will be rounded to three decimal places unless
         specified otherwise.

                   1)  For Mineable Coal and Alternate Coal, the Base Capital
                       Investment Element is [*] per Ton ("Base CIEOriginal").
                       There are three adjustments that cumulatively comprise
                       the Base CIE Adjustments. The Base CIEOriginal shall be
                       adjusted in the order recited, as follows:

                       (i) Capital True Up Adjustment.

                       A one-time capital true up adjustment will be made, in
                       dollars per Ton, pursuant to the Capital True Up
                       Agreement. The Capital True Up Adjustment will be made
                       according to the following formula:

                       Base CIEtrue up adj = Base CIEOriginal + Capital True Up
                       Adjustment (TRUE UP ADJ & ORIGINAL ARE SUBSCRIPTS)


                       Where the Capital True Up Adjustment will be determined
                       as provided for in the Capital True Up Agreement, if it
                       is positive it will increase the Base CIEOriginal and if
                       it is negative it will decrease the Base CIEOriginal.

                                       18


                       (ii) Tax and Depletion Adjustment.

                       In the event the tax ("T") and/or depletion ("PD")
                       factors, as defined in Exhibit "G" "Tax Calculations",
                       change, the Base CIEtrue up adj will be adjusted, as
                       follows:

                       Base CIEtax adj = Base CIEtrue up adj X [OBJECT OMITTED]

                       Where Madj = [OBJECT OMITTED]

                       Where, the Moriginal, NPVC, and NPVD values shall be
                       determined  as  provided  for  in  the  Capital  True  Up
                       Agreement.

                       If T and PD have not  changed,  Base  CIEtax adj shall be
                       equal to the Base CIEtrue up adj.
                       [TAX ADJ & TRUE UP ADJ ARE SUBSCRIPTS]

                       (iii) Inflation-Deflation Adjustment.

                       The Base  CIEtax adj shall be further  adjusted  monthly,
                       according to the following formula:

                       Base CIE = Base CIEtax adj x D1 / D0
                       [1 AND 0 ARE SUBSCRIPTS]

                       D1  and  D0 are  defined  in  Section  8.6  "Inflation  -
                       Deflation Adjustment".

                       In no event shall the inflation-deflation adjustment
                       cause the Base CIE to be less than the Base CIEtax adj.

                  2)   For  Non-SJCC   Coal  the  Non-SJCC   Base  CIE  will  be
                       determined each month as follows:

                       (i)  If the costs to SJCC of the Non-SJCC Coal plus the
                            Base CIE is less than or equal to the Annual Interim
                            Invoice Agreement Price (as defined in Section
                            8.7(B) "Interim Invoice"), the Non-SJCC Base CIE
                            will be equal to the Base CIE.

                       (ii) If the costs to SJCC of the Non-SJCC Coal plus the
                            Base CIE is greater than the Annual Interim Invoice
                            Agreement Price (as defined in Section 8.7(B)
                            "Interim Invoice"), the Non-SJCC Base CIE will be
                            the greater of:

                            a)   The Annual Interim Invoice Agreement Price
                                 minus the costs to SJCC of the Non-SJCC Coal or

                            b)   Zero (0).

                                       19


                  3)   Base Tons

                       The SJCC Base Monthly Tons ("BMT") and the Non-SJCC Base
                       Monthly Tons ("NBMT") shall be determined as follows:

                       (i)  The BMT shall be equal to the MMT unless the NMS are
                            greater than zero and the SMS are less than the MMT,
                            in which case the BMT shall be equal to the MMT
                            minus the NBMT.

                       (ii) The NBMT shall be equal to zero (0) unless the SMS
                            is less than the MMT, in which case the NBMT shall
                            be equal to the lesser of

                            a)  The MMT minus the SMS; or

                            b)  The NMS.

                  4)   Monthly Base CIE Amount.

                       The Monthly Base CIE Amount shall be the sum of:

                       The Base CIE times the BMT; plus,

                       The Non-SJCC Base CIE times the NBMT.

         B)       Incremental CIE

         Each month, Utilities shall pay to SJCC, for each Ton of coal delivered
         during that month by SJCC above the MMT (defined herein), an
         incremental capital investment element calculated as described below:

                  1)   For Mineable Coal and Alternate Coal the Incremental CIE
                       is [*] and will not be subject to inflation or deflation.

                  2)   For Non-SJCC Coal the Non-SJCC Incremental CIE shall be
                       determined as follows. In each month that Non-SJCC Coal
                       is sold under Non-Normal Conditions where an
                       Uncontrollable Forces situation has not been declared,
                       the Non-SJCC Incremental CIE will be equal to zero (0).
                       If the Non-SJCC Coal is sold under Non-Normal Conditions
                       where an Uncontrollable Forces situation has been
                       declared, the Non-SJCC Coal will receive the Incremental
                       CIE.

                  3)   Incremental Tons

                       The SJCC Incremental Monthly Tons ("IMT") and the
                       Non-SJCC Incremental Monthly Tons ("NIMT") shall be
                       determined as follows:

                       (i)  If the SMS are greater than the MMT, the IMT shall
                            be equal to the SMS minus the MMT; otherwise the IMT
                            shall be equal to zero (0).

                       (ii) The NIMT shall be equal to the NMS minus the NBMT.

                                       20


                  4)   Monthly Incremental CIE Amount.

                       The Monthly Incremental CIE Amount shall be the sum of:

                       The Incremental CIE times the IMT; plus,

                       The Non-SJCC Incremental CIE times the NIMT.

         C)       Reimbursable Operating Costs

         Each month, Utilities shall pay to SJCC, SJCC's Reimbursable Operating
         Costs which shall be all Operating Costs defined in Exhibit "F"
         "Operating Costs" paid or incurred in connection with the sale of
         Mineable Coal including mining related reclamation costs incurred by
         SJCC hereunder.

                   1)  Operating Costs that are eligible for the depletion
                       allowance as defined in Exhibit "G" "Tax Calculations"
                       shall be adjusted for income tax and depletion as
                       provided below:

                   Reimbursable Operating Costs = Operating Costs X [OBJECT
                   OMITTED]

                   Where T and PD are as defined in Exhibit "G" "Tax
                   Calculations".

                   2)  All other Operating Costs shall be reimbursed at 100%.

         D)        Administration Element

         Each month, Utilities shall pay to SJCC, an Administration Element
         equal to [*] per month. The Administration Element shall be calculated
         and adjusted for i) tax and depletion, and ii) inflation and deflation
         as herein provided.

         Administration Element = [*] X [OBJECT OMITTED]

         Where T and PD are as defined in Exhibit "G" "Tax Calculations", and D1
         and D0 are defined in Section 8.6 "Inflation - Deflation Adjustment".

         E)        CIE Reconciliation Amount

         In the invoice for December of each year a CIE Reconciliation will be
         made if NAS are greater than zero (0) or if the SMS are less than the
         MMT for any month during the year. The CIE Reconciliation Amount (which
         can be negative) will be added to the December Invoice. The CIE
         Reconciliation Amount will be determined as follows:

         CIE Reconciliation Amount = Annual CIE Amount - CIE Amount Invoiced.

         Where;

         The CIE Amount Invoiced is equal to the sum of the Monthly Base CIE
         Amounts and the Monthly Incremental CIE Amounts invoiced during the
         year (including the December amounts).

         And,

                                       21


         The Annual CIE Amount is equal to the sum of:

                   1)  The AA Base CIE multiplied by the BAT; plus,

                   2)  The AA Non-SJCC Base CIE multiplied by the NBAT; plus

                   3)  The Incremental CIE multiplied by the IAT; plus,

                   4)  The AA Non-SJCC Incremental CIE multiplied by the NIAT.

         F)        Definitions:

                   1)  SJCC Monthly Sales ("SMS") shall be equal to the Tons of
                       Mineable Coal and Alternate Coal delivered in a month.

                   2)  Annual SJCC Sales ("SAS") shall be equal to the sum of
                       the SMS for a calendar year.

                   3)  Non-SJCC Monthly Sales ("NMS") shall be equal to the
                       Non-SJCC Coal delivered in a month.

                   4)  Non-SJCC Annual Sales ("NAS") shall be equal to the sum
                       of the NMS for a calendar year.

                   5)  Total Monthly Sales ("TMS") shall be the sum of the SMS
                       and the NMS.

                   6)  Total Annual Sales ("TAS") shall be the sum of the SAS
                       and the NAS.

                   7)  Minimum Annual Tons ("MAT") shall be defined as the Tons
                       shown in column 2 labeled "Minimum Annual Tons" on
                       Exhibit "H" "San Juan Station Minimum Deliveries 2003 -
                       2017" for each calendar year.

                   8)  Minimum Monthly Tons ("MMT") shall be defined as the
                       monthly portion of the MAT prorated based on the monthly
                       tonnages provided pursuant to Section 4.2(B) "Delivery
                       Rates" or as agreed to by the Parties. If there is not a
                       monthly tonnage allocation of the MAT, the MMT shall be
                       1/12 of the MAT for each month.

                   9)  Short Fall Tons ("SFT"), for any year, shall be defined
                       as zero (0), unless SJCC has not declared an
                       Uncontrollable Forces event and the TAS are less than the
                       MAT in any year in which SJCC is obligated under the
                       terms of this Agreement, to deliver coal in such amounts
                       that the total Tons requested for said year would be
                       greater than or equal to the MAT; in which case the SFT
                       for such year shall be the MAT minus the TAS.

                   10) Weighted Average Annual Base CIE ("AA Base CIE") shall be
                       equal to the sum of the products of the monthly Base CIE
                       multiplied by the MMT for each of the 12 months, all
                       divided by the MAT.

                   11) Weighted Average Annual Non-SJCC Base CIE ("AA Non-SJCC
                       Base CIE") shall be equal to the sum of the products of
                       the Non-SJCC Base CIE multiplied by the NBMT invoiced
                       each month for each of the 12 months, all divided by the
                       sum of the NBMT.

                                       22


                   12) Weighted Average Annual Non-SJCC Incremental CIE ("AA
                       Non-SJCC Incremental CIE") shall be equal to the sum of
                       the products of the Non-SJCC Incremental CIE multiplied
                       by the NIMT invoiced each month for each of the 12
                       months, all divided by the sum of the NIMT.

                   13) The Non-SJCC Base Annual Tons ("NBAT") shall be equal to
                       zero unless the SAS is less than the MAT minus the SFT in
                       which case the NBAT shall be equal to the lesser of:

                       (i)  The MAT minus the SFT minus the SAS or

                       (ii) The NAS.

                   14) The SJCC Base Annual Tons ("BAT") shall be equal to the
                       MAT minus the SFT, unless the NAS is greater than zero
                       (0) and the SAS are less than the MAT minus the SFT, in
                       which case the BAT shall be equal to the MAT minus SFT
                       minus the NBAT.

                   15) If the SAS are greater than the MAT, the SJCC Incremental
                       Annual Tons ("IAT") shall be equal to the SAS minus the
                       MAT; otherwise the IAT shall be equal to zero (0).

                   16) The Non-SJCC Incremental Annual Tons ("NIAT") shall be
                       equal to the NAS minus the NBAT.

8.3      Coal Processing Component
         The Coal Processing Component shall be the sum of the Processing
         Capital Investment Element Amount ("Processing CIE Amount") as
         described in Section 8.3(A), SJCC's Reimbursable Processing Costs
         ("Reimbursable Processing Costs") as described in Section 8.3(B), the
         Processing Administration Element as described in Section 8.3(C), and
         the Processing Capital Investment Element Reconciliation Amount
         ("Processing CIE Reconciliation Amount") as described in Section
         8.3(D).

         A)       Processing CIE Amount

         Each month, Utilities shall pay to SJCC, a Processing Capital
         Investment Element determined as described below:

                   1)  The Processing CIEEligible-Org for the processing of Tons
                       that are eligible for the depletion allowance as
                       described in Exhibit "G" "Tax Calculations" shall be
                       calculated to five decimal places monthly, as described
                       below:

                       [OBJECT OMITTED]

                       Where:

                       T and PD are as defined in Exhibit "G" "Tax
                       Calculations".

                                       23


                   2)  Processing CIE for processing of Tons that are not
                       eligible for the depletion allowance ("Processing
                       CIENon-elg-Org") as described in Exhibit "G" "Tax
                       Calculations" shall be calculated to five decimal places
                       monthly as described below:

                       [OBJECT OMITTED]

                       Where:

                       T and PD are as defined in Exhibit "G" "Tax
                       Calculations".

                   3)  Inflation - Deflation Adjustment - The Processing

                       CIEEligible-Org and Processing CIENon-elg-Org shall be
                       adjusted to three decimal places, monthly, as described
                       below:

                       Processing CIEEligible-Adj = Processing CIEEligible-Org x
                       D1 / D0
                       [ELIGIBLE-ADJ, ELIGIBLE-ORG, 1 & 0 ARE SUBSCRIPTS]

                       And

                       Processing CIENon-elg-Adj = Processing CIENon-elg-Org x
                       D1 / D0
                       [NON-ELG-ADJ & NON-ELG-ORG ARE SUBSCRIPTS]

                       Where:

                       D1 and D0 are defined in Section 8.6 "Inflation -
                       Deflation Adjustment".

                       In no event shall the inflation-deflation adjustment
                       cause the Processing CIEEligible-Adj to be less than the
                       Processing CIEEligible-Org or the Processing
                       CIENon-elg-Adj. to be less than the Processing
                       CIENon-elg-Org.

                   4)  Underground Adjustment. The Processing CIEEligible-Adj
                       and the Processing CIENon-elg-Adj, will be further
                       reduced by [*] per Ton. This [*] reduction will not be
                       subject to inflation or deflation adjustment.

                       Processing CIEEligible = Processing CIEEligible-Adj - [*]
                       [ELIGIBLE & ELIGIBLE-ADJ ARE SUBSCRIPTS]

                       Processing CIENon-eligible = Processing
                       CIENon-elg-Adj - [*]
                       [NON-ELIGIBLE & NON-ELG-ADJ ARE SUBSCRIPTS]

                   5)  The "Monthly Processing Tons" shall be one twelfth (1/12)
                       of the annual tonnage set forth in Column 3 ("Annual
                       Processing Tons") of Exhibit "H" "San Juan Station
                       Minimum Deliveries 2003-2017" for said calendar year.

                       (i)  The "Monthly Eligible Processing Tons" shall be
                            equal to the Monthly Processing Tons times the ratio
                            of Mineable Coal sold to the TMS (Total Monthly
                            Sales). If TMS is equal to zero (0), then Monthly
                            Eligible Processing Tons shall be equal to Monthly
                            Processing Tons.

                       (ii) The "Monthly Non-Eligible Processing Tons" shall be
                            equal to the Monthly Processing Tons times the ratio
                            of Alternate Coal and Non-SJCC Coal sold to the TMS
                            (Total Monthly Sales).

                                       24


                   6)  The Monthly Processing CIE Amount shall be the sum of:

                       (i)  The Monthly Eligible Processing Tons times the
                            Processing CIEEligible; plus,

                       (ii) The Monthly Non-Eligible Processing Tons times the
                            Processing CIENon-eligible.

         B)       Reimbursable Processing Costs

         Each month, Utilities shall pay to SJCC all Operating Costs defined in
         Exhibit "F" "Operating Costs" paid or incurred in connection with the
         processing of Mineable Coal, Non-SJCC Coal and Alternate Coal:

                   1)  all Rental and Royalties and all Taxes, as defined in
                       Paragraphs A and G of Exhibit "F" "Operating Costs", paid
                       or incurred in connection with the processing of coal
                       mined by SJCC hereunder; plus,

                   2)  all Operating Costs defined in Exhibit "F" "Operating
                       Costs" (excluding said Rentals and Royalties, and Taxes
                       referred to in Section 8.3(B)(1)) that are eligible for
                       the depletion allowance will be adjusted as described
                       below:

                            Depletion-eligible Reimbursable SJCC Coal Processing
                            Costs

                            = SJCC Processing Costs X [OBJECT OMITTED]

                            Where T and PD are as defined in Exhibit "G" "Tax
                            Calculations";

                       plus,

                   3)  all of SJCC's Operating Costs, as defined in Exhibit "F"
                       "Operating Costs" (excluding said Rentals and Royalties,
                       and Taxes referred to in Section 8.3(B)(1)) that are not
                       eligible for the depletion allowance will be adjusted as
                       described below:

                            Depletion-ineligible Reimbursable SJCC Coal
                            Processing Costs = SJCC Processing Costs X [*].

         C)       Processing Administration Element

         Each month, Utilities shall pay to SJCC a Processing Administration
         Element comprised of the sum of the following elements:

                   1)  The portion of the Processing Administration Element that
                       is eligible for the depletion allowance shall be
                       calculated and adjusted for i) tax and depletion, and ii)
                       inflation and deflation as follows:

                                       25


                            Eligible Processing Administration Element =
                            [*] X [OBJECT OMITTED] X Mineable Coal %

                            Where T and PD are as defined in Exhibit "G" "Tax
                            Calculations", and D1 and D0 are defined in Section
                            8.6 "Inflation - Deflation Adjustment", and Mineable
                            Coal % is equal to the Tons of Mineable Coal sold
                            divided by the TMS (Total Monthly Sales) expressed
                            as a percentage. If TMS is equal to zero (0), then
                            Mineable Coal % shall be equal to one hundred
                            percent (100%).

                   2)  The portion of the Processing Administration Element that
                       is not eligible for the depletion allowance shall be
                       calculated and adjusted for inflation and deflation as
                       follows:

                            Non-Eligible Processing Administration Element =

                            [*] X [OBJECT OMITTED] X Non-Eligible Coal %

                            Where, D1 and D0 are defined in Section 8.6
                            "Inflation - Deflation Adjustment", and Non-Eligible
                            Coal % is equal to one hundred percent (100%) minus
                            Mineable Coal %.

         D)       Processing CIE Reconciliation Amount

         In any year in which Uncontrollable Forces have not been declared and
         the TAS are less than the annual tonnage set forth in column 3 of
         Exhibit "H" "San Juan Station Minimum Deliveries 2003-2017" for said
         calendar year and in which SJCC was obligated under the terms of this
         Agreement to process coal in such amounts that the total Tons requested
         to be processed for said year would be equal to or greater than the
         annual tonnage set forth in column 3 of Exhibit "H" "San Juan Station
         Minimum Deliveries 2003-2017" SJCC shall make an adjustment to the
         December invoice as herein follows:

         Processing CIE Reconciliation Amount is equal to the average of monthly
         Processing CIEs times [TAS minus the annual tonnage set forth in column
         3 of Exhibit "H" "San Juan Station Minimum Deliveries 2003-2017" for
         the applicable calendar year].

8.4      Non-SJCC Coal and Alternate Coal Costs
         Each month, Utilities shall pay to SJCC all of SJCC's costs of
         acquiring and selling Non-SJCC Coal and Alternate Coal for use by
         Utilities in the San Juan Station, including, without limitation, all
         costs described in Exhibit "F" "Operating Costs" incurred incident to
         any agreement for the purchase of Non-SJCC Coal and Alternate Coal and
         the negotiation thereof, provided that, the Joint Committee has
         approved all costs associated with the acquisition of such Non-SJCC
         Coal and Alternate Coal and such Non-SJCC Coal and Alternate Coal has
         been acquired by SJCC for processing and delivery under this Agreement
         as provided for herein.

                                       26


8.5      Other Costs
         A)       Other Reclamation

         Each month, Utilities shall pay to SJCC all Operating Costs, as defined
         in Exhibit "F" "Operating Costs" paid or incurred in connection with
         performance of other SJCC Site Area reclamation pursuant to Section 7.3
         "Reclamation Activities".

         B)       Substitute REI

         Utilities shall pay to SJCC an amount that is annually equal to the REI
         (as defined in the Fruitland Coal Sublease) multiplied by "X" (which
         may be negative). The monthly invoiced amounts will be based on the
         projected number of Fruitland Substitute Tons (defined below) and
         Fruitland Tons (defined below) for the year.

                  Where:

                  X=A-G

                  And

                  A=The number of Fruitland Substitute Tons is defined as all
                  Tons except Fruitland Tons delivered to SJGS by SJCC,
                  excluding the first [*] Tons other than those subject to the
                  Fruitland Coal Sublease, provided, however, that the number of
                  Fruitland Substitute Tons in any year will not exceed the
                  greater of (i) the REI Minimum (as defined below) plus the REI
                  Shortfall Balance as of the previous year end (as defined
                  below) less the Fruitland Tons, or (ii) zero (0).

                  B=The aggregate cumulative number of Make-up Tons (as defined
                  in the Fruitland Coal Sublease) as of the previous year end.

                  C=The REI Shortfall Balance as of the previous year end. The
                  REI Shortfall Balance for 2002 year end is zero (0). The
                  ending REI Shortfall Balance for each year thereafter will be
                  the greater of (i) the sum of the ending REI Shortfall Balance
                  for the previous year and the REI Shortfall Tons (as defined
                  below) for the year, or (ii) zero (0).

                  D=The number of Fruitland Tons is defined as the actual number
                  of Tons mined and delivered from the Fruitland Leases (as
                  defined in the Fruitland Coal Sublease) during the year.

                  E=The REI Minimum, that shall be equal to the Annual Tonnage
                  defined in the Fruitland Coal Sublease.

                  F=(D-E-C), or zero (0), whichever is greater and

                  G=(B-C), or F, whichever is less.

                  REI Shortfall Tons means for any year the REI Minimum for that
                  year less the sum of Fruitland Tons and Fruitland Substitute
                  Tons for that year. (REI Shortfall Tons may be negative).

                                       27


         C)       Payments under Cimarron Coal Assignment

         Each month, Utilities shall pay to SJCC all of SJCC's costs and
         obligations, if any, arising from the Cimarron Coal Assignment.

         D)       Payments under the Ute ROW

         Each month, Utilities shall pay to SJCC all of SJCC's costs and
         obligations, if any, arising from the Ute ROW.

         E)       Other Miscellaneous Costs

         Each month, Utilities shall pay to SJCC all Operating Costs, as defined
         in Exhibit "F" "Operating Costs" paid or incurred in connection with
         Other Costs.

8.6      Inflation - Deflation Adjustment
         A)       The "Inflation Index", calculated to three decimal places,
                  shall be equal to the sum of [*] times the "Producer Price
                  Index - Commodities for Construction Machinery and Equipment
                  (Series Id WPU112)" not seasonally adjusted, as published by
                  the United States Department of Labor, Bureau of Labor
                  Statistics ("Index"), plus [*] times the "Implicit Price
                  Deflator, Gross Domestic Product", as published by the United
                  States Department of Commerce, Bureau of Economic Analysis
                  ("Deflator").

                  1)   D0 shall be the Inflation Index calculated using the most
                       recently published values for June 2000, for the Index
                       and Deflator.

                  2)   D1 shall be the Inflation Index calculated using the most
                       recently published values available for the date of the
                       invoice, for the Index and Deflator.

         B)       The factors D0 and D1 determined when the final UG-CSA invoice
                  is issued, as described above, will not be further adjusted
                  even though the Index and Deflator may be further revised.

         C)       The following matters are made a responsibility of the Joint
                  Committee to be carried out as provided for in Section 10
                  "Joint Committee":

                  1)   Revision of a base index figure as derived from a
                       published index in the event of a change in the base
                       point of such latter index, in accordance with pertinent
                       published instructions regarding such revision, or if no
                       such instructions be published, a proportionate revision
                       which will fairly reflect any such change in the base
                       point.

                  2)   Development of a mutually acceptable substitute index
                       (either published or compiled or arranged by the Parties)
                       in the event that publication of any of the published
                       indices specified for use under this Section 8 should be
                       discontinued or in the event the items or categories upon
                       which such published index is based should be so modified
                       or changed as to make the further use of such index
                       inequitable, and any needed subsequent revisions of such
                       a substitute index.

                                       28


8.7      Invoicing and Settlement
         The accounting and billing period under this Agreement shall be one
         month. Such one-month period shall be a fiscal month (currently defined
         as a calendar month) as adopted by SJCC unless the Joint Committee
         shall specify a different one-month period. SJCC shall send to
         Utilities monthly invoices for the compensation due to SJCC for the
         month in question. Both Utilities and SJCC recognize that some of the
         information applicable to an invoice may not be available at the time
         the invoice is prepared by SJCC and submitted to Utilities. In such
         event, the submitted invoice shall be based upon the best available
         information. Upon receipt of such formerly unavailable information SJCC
         shall prepare and furnish to Utilities a supplemental invoice.

         SJCC shall prepare and provide the Utilities with a UG-CSA Invoice and
         an Interim Invoice each month. Utilities shall make payments to SJCC
         based on the Interim Invoice.

         A)       UG-CSA Invoice

         UG-CSA Invoices submitted hereunder shall set forth in reasonable
         detail the following in a format to be agreed upon by the Parties:

                  1)   Coal Costs

                       (i)  The Mining and Reclamation Component

                            a) Base CIE Amount

                            b) Incremental CIE Amount

                            c) Reimbursable Operating Costs

                            d) Administration Element

                            e) CIE Reconciliation Amount

                       (ii) The Coal Processing Component

                            a) Processing CIE Amount

                            b) Reimbursable Processing Costs

                            c) Processing Administration Element

                            d) Processing CIE Reconciliation Amount

                       (iii)Non-SJCC Coal and Alternate Coal Costs

                  2)   Other Costs

                       (i)  Other Reclamation

                       (ii) Substitute REI

                       (iii)Payments under Cimarron Coal Assignment

                       (iv) Payments under the Ute ROW

                       (v)  Other Costs


                                       29


         B)       Interim Invoice

         The Parties, by mutual agreement, shall negotiate an Annual Interim
         Invoicing Agreement to govern the monthly invoicing of coal.

         The Annual Interim Invoice Agreement Price shall be the average annual
         price for all Mineable Coal pursuant to the Annual Interim Invoicing
         Agreement.

         In the event the Parties are unable to mutually agree on an Annual
         Interim Invoicing Agreement the Interim Invoice will be determined as
         follows:

                  1)   The base price or equivalent from the prior year's
                       Interim Invoicing Agreement, adjusted for the prior year
                       UG-CSA Invoice to Interim Invoice true up, will be the
                       base price for the MMT.

                  2)   The prior year's incremental price will be the
                       incremental price for all Tons above the MMT.

                  3)   There will be an adjustment to the December Interim
                       Invoice to make the amounts received from the monthly
                       Interim Invoices equal to the amount that would have been
                       due based on the UG-CSA Invoices.

         C)       Settlement and Payment

         Invoices submitted by SJCC in accordance with Section 8.7 "Invoicing
         and Settlement" and any supplemental or true-up invoices shall be due
         and payable by Utilities on the twenty-second (22nd) day of the month
         succeeding the month for which such invoice is submitted, or on the
         twelfth (12th) day after receipt of the invoice by Utilities, whichever
         date is later. Payment shall be made to SJCC by electronic funds
         transfer to such bank account as SJCC may from time to time designate.

         D)       Accounting Records

         SJCC shall maintain its accounts and records in accordance with
         generally accepted accounting principles consistently applied. SJCC
         shall retain such accounts and records for any calendar year for five
         (5) years following the end of such calendar year and for such
         reasonable additional period as specifically requested by Utilities.

         E)       Disputed Invoices

         In case any portion of an invoice shall be in dispute, the undisputed
         amount shall be paid when due; provided however, that Utilities may
         also pay the disputed portion of such invoice without thereby waiving
         their right to contest such disputed portion.

         F)       Failure to Pay

         In the event Utilities fail to pay any amount due and not in bona fide
         dispute, Utilities shall pay SJCC interest on all amounts owing under
         any invoice submitted hereunder which are not paid when due and
         payable, with said interest to be calculated at the Prime Rate as
         published in the Wall Street Journal for corporate loans posted by at
         least 75% of the nation's largest banks (or its equivalent) plus three

                                       30


         percent (3%) but not in excess of the maximum rate of interest
         permitted by law and to be paid for the actual number of days elapsed
         from and including the date the invoice was due and payable until funds
         are received in SJCC's account. This right shall not be deemed an
         exclusive right or remedy.

         G)       Suspension of Payment for Failure to Deliver

         In the event SJCC fails to deliver coal, which failure to deliver is
         not caused by Utilities, and which failure to deliver is not excused by
         the provisions of Section 12.2 "Uncontrollable Forces" hereof, and if
         such failure to deliver continues for ten (10) days after final demand
         for delivery by Utilities, Utilities shall have the right to suspend
         payment for any coal previously delivered by SJCC until coal deliveries
         shall have been recommenced. This right shall not be deemed an
         exclusive right or remedy.

         H)       Audits

         SJCC will keep books, records and accounts necessary to show all
         information required for purposes of this Agreement. Upon Utilities'
         request, SJCC shall supply Utilities, by report and/or with actual
         source documents, the information reasonably necessary to verify any
         invoice rendered to Utilities pursuant to this Agreement; provided,
         however, that SJCC shall not be required to disclose information which
         in the opinion of SJCC is of a confidential nature due to the
         relationship of such information to SJCC's existing or contemplated
         operations. In the event Utilities and SJCC are unable to agree that
         the invoice is calculated correctly, a verification of such invoice
         shall be prepared and certified by a nationally recognized firm of
         certified public accountants, to be selected by Utilities from a list
         of three (3) such firms submitted by SJCC, such verification to set
         forth all data reasonably necessary to verify that the invoice is
         calculated correctly. The findings of said verification shall be
         accepted by both Utilities and SJCC as final and binding with respect
         to that invoice. The accounting firm selected for any such verification
         shall be bound not to disclose and shall treat as confidential any and
         all proprietary information of SJCC furnished to or examined by such
         firm in connection with such audit. It is understood that such
         verification shall not provide Utilities with nor entitle Utilities to
         access to SJCC's books or records.

         If any such verification discloses that a calculation error has
         occurred and that, as a result thereof, an amount is due to one or the
         other party, such amount shall promptly be paid to whom it is owed;
         provided, however, if there is a dispute relating to the validity of a
         charge or adequacy of a payment either party may submit such dispute to
         the Joint Committee. All expenses of any such requested verification
         shall be paid by Utilities. Invoices which are not contested by either
         party within twenty-four (24) months from the date of the Invoice shall
         be deemed to be correct and will not thereafter be subject to
         verification.

                                       31


                       Section 9 - Coordinating Committee
                       ----------------------------------

9.1      Purpose
         The intent of the Parties in providing for a Coordinating Committee is
         to establish an orderly and continuing means of dealing with certain
         engineering and operating problems which may arise from time to time in
         carrying out the provisions of this Agreement. The Coordinating
         Committee shall have two (2) members and shall be responsible for
         making decisions concerning said engineering and operating problems
         which may arise from time to time under this Agreement, including those
         matters expressly specified herein.

9.2      Designation
         During the term of this Agreement, SJCC will, by notice to Utilities,
         designate an individual as its representative on the Coordinating
         Committee and Utilities will, by notice to SJCC, together designate one
         (1) individual as their representative on the Coordinating Committee
         and each such representative shall be authorized by the party(ies) by
         whom he is designated to act on its (their) behalf with respect to
         matters herein specified to be the responsibilities of the Coordinating
         Committee, but shall have no authority to amend this Agreement. A
         representative may not delegate his responsibilities to others, but
         Utilities, or SJCC, may designate an alternate to act when the
         representative is unavailable. Either Utilities, or SJCC, by notice to
         the other, may change the designation of its (their) representative.

9.3      Procedures and Practices
         It shall be the responsibility of the Coordinating Committee to
         establish or approve, for the guidance of the local operating personnel
         of the respective Parties, procedures and standard practices,
         consistent with the provisions of this Agreement, with respect to:

         A)       Changes in the 24-hour period used in computing the average
                  heating value of coal delivered pursuant to Section 5.2 "Coal
                  Quality".

         B)       Operations involved in the delivery of coal per Section 4
                  "Delivery of Coal" and in the weighing, sampling and analysis
                  of coal pursuant to Section 5.4 "Weighing and Analysis
                  Facilities and Methods".

         C)       Operating, accounting and reporting details required to carry
                  out the provisions of this Agreement with respect to invoicing
                  and settlement pursuant to Section 8.7 "Invoicing and
                  Settlement".

         D)       Exchange of technical information and data pertinent to coal
                  mining, reclamation and delivery operations under this
                  Agreement.

         E)       Any other matters expressly made the responsibility of the
                  Coordinating Committee under the terms of this Agreement.

                                       32


9.4      Coordinating Committee Decisions
         The establishment or approval of a procedure or standard practice shall
         be evidenced by the signatures of both representatives of the
         Coordinating Committee.

9.5      Relationship to Joint Committee and Arbitration
         If the Coordinating Committee fails to resolve matters referred to it
         pursuant to this Agreement, such matters shall be submitted to the
         Joint Committee for resolution as provided for in Section 10 "Joint
         Committee".

                                       33


                          Section 10 - Joint Committee
                          ----------------------------

10.1     Purpose
         The intent of the Parties in providing for a Joint Committee is to
         establish an orderly and continuing means of dealing with major matters
         which may arise from time to time in carrying out the provisions of
         this Agreement and for the resolution of matters which cannot be
         resolved by the Coordinating Committee, as more specifically defined
         below. The Joint Committee shall have four (4) members.

10.2     Designation
         During the term of this Agreement, SJCC will, by notice to Utilities,
         designate two (2) individuals as its representatives on the Joint
         Committee, and Utilities will, by notice to SJCC, designate two (2)
         individuals as their representatives on the Joint Committee; and each
         such representative shall be authorized by the party(ies) by whom he is
         designated to act on its (their) behalf with respect to matters herein
         specified to be responsibilities of the Joint Committee. A
         representative may not delegate his responsibilities to others, but
         Utilities, or SJCC, may designate an alternate to act when said
         representative is unavailable. Either Utilities, or SJCC, by notice to
         the other, may change the designation of its (their) representatives.

10.3     Authority
         The Joint Committee shall have the following authority, and shall have
         the responsibility to act if appropriate, with respect to the following
         matters:

         A)       Review and approval of an annual operating cost budget, which
                  shall be proposed and submitted by SJCC prior to October 1 of
                  each calendar year. The annual operating cost budget shall
                  include a schedule of service contracts with an annual value
                  greater than $1,000,000. It is recognized that this dollar
                  limit may not be sufficient throughout the duration of this
                  Agreement, and it shall therefore be the responsibility of the
                  Joint Committee to review said dollar limit, no less often
                  than every five (5) years, and to determine adequate dollar
                  limits for the then current conditions. Utilities shall
                  approve or disapprove the annual operating cost budget within
                  thirty (30) days after submission by SJCC. Unless Utilities
                  shall disapprove the annual operating cost budget within said
                  time period, the same shall be deemed approved. However, in
                  the event that Utilities shall not approve the annual
                  operating cost budget, SJCC shall nonetheless be empowered to
                  make such operating expenditures as it shall reasonably deem
                  necessary in order to perform its obligations hereunder, and
                  the reasonableness of such expenditures shall be submitted to
                  and determined by arbitration as provided for in Section 11
                  "Dispute Resolution". With regard to any approved annual
                  operating cost budget, SJCC shall be paid its Operating Costs
                  in accordance with this Agreement as follows:

                  1)   in the event that Operating Costs paid or incurred by
                       SJCC do not exceed one hundred fifteen percent (115%) of
                       the Operating Costs contained in said budget, SJCC shall
                       be paid all of its Operating Costs;

                                       34


                  2)   in the event Operating Costs paid or incurred by SJCC
                       exceed in amount the Operating Costs payable to SJCC
                       pursuant to the immediately preceding Section 10.3(A)(1),
                       then SJCC shall be paid its Operating Costs to the extent
                       that the same would be payable in accordance with the
                       immediately preceding Section 10.3(A)(1), and either
                       Utilities or SJCC may submit to the Joint Committee the
                       question of the appropriateness of the Operating Costs in
                       excess of such reimbursed amount.

         In conjunction with said approval of the annual operating cost budget,
         SJCC shall give Utilities a map showing the areas planned to be mined
         by SJCC in the following year and the sequence of mining planned by
         SJCC in each such area.

         B)       Review of changes not anticipated in the latest annual
                  operating cost budget if budgeted expenditures are materially
                  affected.

         C)       Review a capital budget that shall be provided by SJCC at the
                  same time as the annual operating cost budget for
                  informational purposes.

         D)       Establish policies, programs and procedures for:

                  1)   determination of the level of reimbursement, if any, of
                       SJCC's Operating Costs to be paid during periods when
                       SJCC is unable to mine, process and sell coal by reason
                       of Uncontrollable Forces, and;

                  2)   determination of the level of coal to be purchased and
                       paid for by Utilities, if any, during periods when
                       operation of the San Juan Station is materially curtailed
                       or prevented by Uncontrollable Forces (it being agreed
                       that in such event the obligation of Utilities to
                       purchase and pay for coal, and to make any other payments
                       under this Agreement, shall be deferred unless otherwise
                       determined by the Joint Committee).

         E)       Consider and attempt to resolve any disputes which may be
                  referred to the Joint Committee.

         F)       Consider the enlargement of the space made available to SJCC
                  at the San Juan Station site pursuant to Section 6.2 "SJCC's
                  Facilities".

         G)       Consider any other matters expressly made the responsibility
                  of the Joint Committee under the terms of this Agreement,
                  including, but not limited to, the responsibilities set forth
                  in Section 3.2 "Alternate Coal".

10.4     Decisions by the Joint Committee
         Decisions by the Joint Committee shall require the unanimous approval
         of all representatives of the Joint Committee and shall be evidenced by
         the signatures of all said representatives.

                                       35


10.5     Relationship to Arbitration
         If the Joint Committee fails to resolve matters referred to it pursuant
         to this Agreement, such matters may be submitted to and determined by
         arbitration as provided for in Section 11 "Dispute Resolution".

                                       36


                        Section 11 - Dispute Resolution
                        -------------------------------

11.1     Matters To Be Arbitrated; Notice of Claims and Defenses; Party
         Arbitrator Designation
         Either party may demand final and binding arbitration of any dispute,
         claim or controversy arising out of or relating to this Agreement,
         performance or actions pursuant to this Agreement, or concerning the
         interpretation of this Agreement (whether such matters sound in
         contract, tort or otherwise and including without limitation
         repudiation, illegality, and/or fraud in the inducement) by giving
         written notice to the other party of all claims it desires to submit to
         arbitration; provided, however, that matters within the authority of
         the Joint Committee must be presented first to that committee for
         consideration. The notice shall include: (a) the demanding party's
         designation of a party arbitrator; and (b) a detailed statement of the
         facts and theories supporting the claims. The party on whom the
         arbitration demand is served shall have thirty days from receipt of the
         notice to respond in writing to the demand and to submit any additional
         claims it wishes to submit to arbitration at the same time. The
         response also shall include: (a) the designation of the party
         arbitrator for that party; and (b) a detailed statement of the facts
         and theories supporting the claims and/or defenses asserted. The party
         originally demanding arbitration shall reply in writing to any
         additional claims submitted within ten days from the receipt of such
         response.

11.2     Arbitrators; Selection of Neutral Arbitrator
         Any party who fails to designate timely its party arbitrator shall
         forfeit its right to designate an arbitrator. If only one arbitrator is
         timely designated, that single arbitrator shall hear the dispute. If
         two arbitrators are timely designated, those arbitrators shall, within
         thirty days, either agree on the appointment of a third, disinterested
         arbitrator knowledgeable as to the subject matter involved in the
         arbitration or petition the Chief Judge of the United States District
         Court for the District of New Mexico for the appointment of a third
         arbitrator. The parties shall be equally liable for the reasonable fees
         and expenses of the neutral arbitrator hearing the dispute. The parties
         shall be responsible for the fees and expenses of their respective
         party-appointed arbitrator.

11.3     Arbitration Hearings, Procedures and Timing
         All reasonable efforts will be made to hold a hearing on the claims
         submitted within sixty days after the appointment of the last
         arbitrator. In conducting the hearing, the arbitrators are directed,
         where feasible and where not inconsistent with the provisions of this
         section, to adhere to the then-existing American Arbitration
         Association procedures and rules relating to commercial disputes.
         Unless otherwise agreed by the parties, the hearing shall be held in
         Farmington, New Mexico.

11.4     Choice of Law
         The arbitrators shall apply the laws of the State of New Mexico.

                                       37


11.5     Award and Enforcement
         The decision or award of the arbitrators shall be given in writing
         within thirty days after the conclusion of the hearing. The arbitrators
         are authorized to award money damages, injunctive and declaratory
         relief and/or specific performance, if such relief in their opinion is
         appropriate. In any arbitration, each party shall bear its own costs,
         expenses, and attorneys' fees. The arbitrators do not have authority to
         award costs, expenses, or attorneys' fees to the prevailing party. The
         award or decision of the arbitrators shall be subject to review or
         enforcement in accordance with the New Mexico Uniform Arbitration Act,
         NMSA 1978 ss.ss. 44-7-1 et seq. Any party shall be entitled to recover
         reasonable attorneys' fees and costs incurred in enforcing any
         arbitration award or decision made pursuant to the arbitration
         provisions of this Agreement.

11.6     Performance Pending Arbitration Decision
         During the arbitration, unless otherwise ordered by the arbitrators,
         the parties shall continue to perform under this Agreement.

11.7     Definition of "Party" for this Section
         For purposes of this Section 11 the Utilities shall be considered a
         single party. Specifically, and by example, Utilities must act
         collectively to select their party-appointed arbitrator under Section
         11.3 "Arbitration Hearings, Procedures and Timing".

                                       38


 Section 12 - Non-Normal Conditions, Right to Cure, Termination and Expiration
 -----------------------------------------------------------------------------

12.1     Utilities' Right to Mine
         A)       Emergency Situation. An emergency situation shall be deemed to
                  have arisen if, for any reason, including Uncontrollable
                  Forces, SJCC shall be unable to maintain deliveries of coal as
                  required of SJCC hereunder and BHP Minerals International Inc.
                  shall fail to cause such deliveries to be made pursuant to the
                  Guarantee ("Emergency Situation").

         B)       Mining and Delivery of Coal by Utilities. In the event that an
                  Emergency Situation as set forth in Section 12.1(A) above
                  should arise and Utilities are able to cause such deliveries
                  to be made, then in such event Utilities may go upon the SJCC
                  Site Area and, using SJCC's equipment, mine coal therefrom and
                  deliver such coal. If Utilities undertake such operations,
                  SJCC will have its supervisory personnel direct and assist
                  Utilities in such operation.

         C)       Termination of Emergency Situation. Such operations by
                  Utilities shall terminate on notice from SJCC when SJCC is
                  able to resume normal coal deliveries to Utilities.

12.2     Uncontrollable Forces
         Neither party shall be deemed in default of any obligation under this
         Agreement, and performance of such obligation shall be deferred during
         such period as and to the extent that performance is prevented by
         reason of Uncontrollable Forces, the term "Uncontrollable Forces"
         meaning any cause beyond the control of the party affected which by
         exercise of due diligence it shall be unable to overcome, including,
         without limitation, failure of plant or facilities, flood, earthquake,
         storm, lightning, fire, explosion, epidemic, war, riot, civil
         disturbance, labor stoppage, sabotage, restraint by court or public
         authority, or the necessity for compliance with any applicable law,
         regulation, ordinance or resolution. Neither party shall, however, be
         relieved of liability for failure of performance if such failure be due
         to causes arising out of its own negligence or to causes which it
         could, but fails to, remove or remedy with reasonable dispatch. Nothing
         herein contained shall be construed to obligate a party to forestall or
         settle a labor dispute against its will. All times and periods for the
         performance of any obligation in this Agreement shall be extended by
         the period during which performance is prevented by Uncontrollable
         Forces.

12.3     Non-Normal Conditions, Right to Cure, and Offers of Non-SJCC Coal.
         The Parties intend that in the effort to avoid Material Default, the
         provisions of this Section 12.3 shall be utilized before notice of
         Material Default Conditions (defined in Section 12.4(A) "Material
         Default Conditions") is provided pursuant to Section 12.4(C) "Notice of
         Material Default Condition(s)".

         A)       Non-Normal Conditions. Non-Normal Conditions exist when any of
                  the following three conditions are present:

                                       39


                  1)   The Reserve of Coal is below the level of 1.2 million
                       Tons,

                  2)   SJCC has determined that there is a reasonable
                       probability that the Reserve of Coal will in the near
                       future fall below the level of 1.2 million Tons, or

                  3)   SJCC anticipates or is experiencing any other condition
                       that may prevent SJCC from delivering coal according to
                       this Agreement.

         B)       Notice. SJCC shall provide written notice to the Utilities if
                  any Non-Normal Conditions exist, or the Joint Committee may
                  determine that Non-Normal Conditions exist, which shall
                  constitute notice to SJCC and the Utilities as of the date of
                  such written determination.

         C)       Prevention Due to Uncontrollable Forces. In addition to
                  providing written notice of Non-Normal Conditions, SJCC may
                  elect to declare that the performance is prevented by reason
                  of Uncontrollable Forces in accordance with the terms of
                  Section 12.2 "Uncontrollable Forces".

         D)       Coal Usage Forecast. Within fifteen (15) days after receipt of
                  notice of Non-Normal Conditions, the Utilities will review
                  dispatch at San Juan Station and provide to SJCC an updated
                  coal usage forecast.

         E)       Cure of Non-Normal Conditions. The Parties intend that
                  cooperation among the Parties in developing and agreeing upon
                  a Cure Plan (as defined below) is preferable to pursuing
                  termination of this Agreement. The Parties will provide
                  reasonable cooperation to facilitate SJCC's cure of Non-Normal
                  Conditions to avoid Material Default while allowing the
                  Utilities to continue operation of the San Juan Station. To
                  initiate and effectuate cure of the Non-Normal Condition, SJCC
                  shall do the following:

                  1)   Provide within fifteen (15) days after notice of
                       Non-Normal Conditions, or as otherwise agreed to by the
                       Parties, a written cure plan to the Joint Committee
                       describing SJCC's proposed means of curing the Non-Normal
                       Conditions and its proposed deliveries in the interim
                       ("Cure Plan");

                  2)   Within thirty (30) days after notice of Non-Normal
                       Conditions, or as otherwise agreed to by the Parties,
                       SJCC may provide written offers to the Utilities to
                       supply Non-SJCC Coal. If the Non-Normal Conditions are
                       caused by Uncontrollable Forces, then such Non-SJCC Coal
                       will be priced as Alternate Coal. If there is a dispute
                       whether the Non-Normal Conditions are caused by
                       Uncontrollable Forces, the Non-SJCC Coal will be priced
                       as Alternate Coal and will be re-priced as Non-SJCC Coal
                       if necessary when the dispute is resolved. If the
                       Non-Normal Conditions are not caused by Uncontrollable
                       Forces, then, the Non-SJCC Coal shall be priced as
                       described in Section 8 "SJCC Compensation".

                                       40


                       SJCC will provide coal quality information for the
                       Non-SJCC Coal with the written offers and will propose
                       the delivery schedule and quantity of Non-SJCC Coal to be
                       supplied.

                  3)   Within fifteen (15) days after receipt of a proposed Cure
                       Plan, the Joint Committee shall meet to consider and act
                       on the Cure Plan.

                  4)   Within fifteen (15) days after receipt of an offer to
                       supply Non-SJCC Coal, the Joint Committee will meet to
                       approve or reject the Non-SJCC Coal offer. Failure to
                       approve the offer shall constitute its rejection.

                  5)   For offers of Non-SJCC Coal only, SJCC will meet the
                       revised coal minimum quality standard of at least 8700
                       BTU per pound measured as provided in Section 5.2 "Coal
                       Quality".

                  6)   As part of its Cure Plan, SJCC will provide weekly
                       written notice to the Utilities of daily inventory levels
                       of the Reserve of Coal.

         F)       Rejection of Non-SJCC Coal. If the Joint Committee rejects an
                  offer of Non-SJCC Coal that is proposed, and if the price of
                  that Non-SJCC Coal offer is [*], then the offer of Non-SJCC
                  Coal will be credited as coal delivered for the sole purpose
                  of determining whether a Material Default Condition exists,
                  unless the Joint Committee agrees that the Non-Normal
                  Condition is due to Uncontrollable Forces, in which case
                  Material Default provisions are inapplicable.

         G)       Rejection of Non-SJCC Coal after Initial Approval. If the
                  Utilities determine and the Joint Committee agrees that
                  delivery of coal from a certain Non-SJCC Coal source is shown
                  to materially impair operations at the San Juan Station, the
                  Utilities may reject the unburned portion of that coal and, if
                  so, SJCC shall terminate delivery of that coal. The remainder
                  of such rejected coal shall not be credited as coal delivered
                  for purposes of determining whether a Material Default
                  Condition exists.

         H)       Termination of Non-Normal Conditions. The Non-Normal
                  Conditions will terminate when all of the following occur:

                  1)   The Reserve of Coal exceeds 1.2 million Tons;

                  2)   SJCC can supply the quantities of coal required by this
                       Agreement from the Coal Leases, Remnant Coal, or
                       Alternate Coal and/or previously acquired Non-SJCC Coal;

                  3)   SJCC can meet the coal quality specifications described
                       in Section 5.2 "Coal Quality"; and

                  4)   SJCC gives written notice of the termination of
                       Non-Normal Conditions.

                                       41


12.4     Material Default.
         A)       Material Default Conditions. The existence of any of the
                  following material default conditions ("Material Default
                  Conditions") may result in a Material Default by SJCC:

                  1)   Failure of SJCC to deliver coal as specified in Section
                       4.2 "Delivery Rates" such that:

                       (i)   A ten percent (10%) per month or greater shortfall
                             in deliveries as set forth in Exhibit "D" "Delivery
                             Rates" occurs in any six (6) consecutive months (as
                             adjusted pursuant to Section 12.3(F) "Rejection of
                             Non-SJCC Coal"); or

                       (ii)  A cumulative shortfall of sixty percent (60%) in
                             deliveries as set forth in Exhibit "D" "Delivery
                             Rates" occurs over any three (3) month period (as
                             adjusted pursuant to Section 12.3(F) "Rejection of
                             Non-SJCC Coal");

                  2)   Failure of SJCC to comply with the requirements of
                       Section 5.2 "Coal Quality" (as amended by Section
                       12.3(E)(5) in the event that Non-SJCC Coal is supplied
                       under Non-Normal Conditions);

                  3)   Failure of SJCC to maintain a Reserve of Coal greater
                       than 250,000 Tons.

                  The  occurrence of any of the above conditions is not itself a
                  Material Default

         B)       Material Default exists when:

                  1)   One or more of the Material Default Conditions exist;

                  2)   Notice is provided pursuant to Section 12.4(C) "Notice of
                       Material Default Condition(s)", and,

                  3)   SJCC fails to avoid Material Default under Section
                       12.4(D) "Avoidance of Material Default".

         C)       Notice of Material Default Condition(s). SJCC shall not be in
                  Material Default under this Agreement unless and until SJCC
                  shall have received from Utilities written notice of one or
                  more Material Default Conditions specifying the particulars.
                  SJCC may seek to avoid or cure the Material Default
                  Condition(s) pursuant to the provisions of Section 12.4(D)
                  "Avoidance of Material Default". SJCC shall not be
                  conclusively deemed in Material Default if SJCC disputes the
                  existence of any alleged Material Default unless and until
                  there is a final resolution pursuant to Section 11 "Dispute
                  Resolution" of this Agreement to determine the existence or
                  non-existence of Material Default.

         D)       Avoidance of Material Default. SJCC can prevent any of the
                  Material Default Conditions from becoming a Material Default
                  by any one or more of the following actions:

                                       42


                   1)  SJCC proceeds with due diligence to cure the alleged
                       Material Default Condition(s) within thirty (30) days
                       after receipt of the notice of Material Default
                       Condition(s);

                   2)  BHP Minerals International Inc. proceeds with due
                       diligence to cure the alleged default within thirty (30)
                       days of receipt of the notice of Material Default
                       Condition(s);

                   3)  SJCC declares prevention of performance by reason of
                       Uncontrollable Forces pursuant to Section 12.2
                       "Uncontrollable Forces", and that declaration is not
                       subsequently invalidated by arbitration;

                   4)  SJCC gives notice of Non-Normal Conditions and operates
                       according to a Cure Plan approved by the Joint Committee;
                       or

                   5)  SJCC disputes the existence of Material Default
                       Condition(s), and there is a final resolution pursuant to
                       Section 11 "Dispute Resolution" that SJCC was not in
                       Material Default hereunder.

         E)       Utilities' Remedies for SJCC's Material Default. Upon a
                  Material Default caused by the existence of a Material Default
                  Condition that is not avoided pursuant to Section 12.4(D)
                  "Avoidance of Material Default", the Utilities shall have the
                  following remedies:

                   1)  The Utilities may terminate this Agreement for Material
                       Default. Upon termination for Material Default, the
                       Utilities shall have the options set forth in Section
                       12.5 "Termination".

                   2)  Only in the event of an Emergency Situation as provided
                       in Section 12.1 "Utilities' Right to Mine", Utilities or
                       Utilities' agents may, in lieu of seeking termination or
                       any other remedy, go upon the SJCC Site Area, use SJCC's
                       equipment to mine coal therefrom, and deliver such coal
                       to the Delivery Points. The compensation to be paid by
                       Utilities to SJCC for such use of SJCC's equipment shall
                       be agreed upon by the Joint Committee. Such operations by
                       Utilities shall terminate when SJCC gives notice and is
                       able to assume normal deliveries.

                   3)  In addition to the rights provided in Section 12.5
                       "Termination" to termination and the limited right to
                       mine, Utilities shall have any other remedies provided by
                       law, subject to the waiver of consequential damages in
                       Section 14.16 "Waiver of Consequential Damages".

12.5     Termination
         A)       Options of Utilities Upon Termination.

         Upon termination of this Agreement for Material Default, in addition to
         other remedies provided in Section 12.4(E) "Utilities' Remedies for
         SJCC's Material Default" the Utilities shall have the option to:

                                       43


                   1)  Acquire SJCC's rights, title and interest in and to any
                       or all of SJCC's plant and capital equipment used by SJCC
                       in carrying out its obligations under this Agreement and
                       the Coal Leases and other leases within the SJCC Site
                       Area including all of SJCC's permits and reclamation
                       bonds, paying SJCC therefore in cash the greater of the
                       fair market value of SJCC's plant and capital equipment,
                       and Coal Leases as determined by the Joint Committee, or
                       SJCC's book cost net of depreciation of said plant and
                       capital equipment, and the net value of the acquisition
                       cost of the Coal Leases and other leases in the SJCC Site
                       Area;

                   2)  Require SJCC to dispose of any or all of SJCC's plant and
                       capital equipment used by SJCC in carrying out its
                       obligations under this Agreement, and interest in the
                       Coal Leases and other leases in the SJCC Site Area
                       including all of SJCC's permits and reclamation bonds,
                       for cash at prevailing market prices and to pay SJCC all
                       costs of disposal plus the amount, if any, by which
                       SJCC's book cost net of depreciation of said plant and
                       capital equipment, and the net value of the acquisition
                       cost of the Coal Leases and other leases in the SJCC Site
                       Area exceed the amount received by SJCC on account of the
                       disposal thereof; or

                   3)  Exercise neither of the above options, in which case SJCC
                       shall retain such property interests as are necessary for
                       the time required to satisfy all reclamation and other
                       obligations, including, without limitation, the
                       obligations pursuant to Section 7.3 "Reclamation
                       Activities".

         B)       Notice of Election. Within thirty (30) days after termination
                  of this Agreement, the Joint Committee will determine fair
                  market value and book value of SJCC's plant, capital equipment
                  and the Coal Leases and other leases in the SJCC Site Area,
                  including all of SJCC's permits and reclamation bonds. The
                  Joint Committee will not disband until it determines such
                  values. Within thirty (30) days after receipt of the Joint
                  Committee determination of value, the Utilities shall notify
                  SJCC in writing which of the above three options the Utilities
                  elect. In the event the Utilities elect the option identified
                  in Section 12.5(A)(1), SJCC shall, within thirty (30) days
                  after written notice of said election, deliver to Utilities a
                  sufficient bill of sale or other appropriate instrument of
                  conveyance, together with an invoice showing in reasonable
                  detail the amount due, whereupon Utilities shall, within sixty
                  (60) days thereafter, remit to SJCC the amount due. In the
                  event Utilities shall elect the option identified in Section
                  12.5(A)(2), SJCC shall undertake to promptly dispose of its
                  plant and capital equipment, and interest in the Coal Leases
                  and other leases in the SJCC Site Area, including all of
                  SJCC's permits and reclamation bonds, and shall thereafter
                  invoice Utilities for the amount due SJCC (said invoice to
                  show in reasonable detail the amount, if any, received as a
                  result of said disposition, SJCC's book cost (net of
                  depreciation) and the balance due), whereupon Utilities shall,
                  within sixty (60) days after receipt of said invoice, remit to
                  SJCC the amount due SJCC.

                                       44


         C)       Terms of Transfer. Any transfer of all of SJCC's rights, title
                  and interest in and to the Coal Leases and other leases in the
                  SJCC Site Area, including all of SJCC's permits and
                  reclamation bonds shall be by an appropriate instrument of
                  conveyance, with special warranty covenants, subject to
                  necessary consents, and such assignment and/or transfer will
                  become effective at the earliest possible time after the
                  termination of this Agreement or extension thereof.

         D)       Liabilities Upon Termination. Upon termination the Utilities
                  shall assume all financial obligations, if any, attributable
                  to

                  1)   The then remaining term of the Cimarron Coal Assignment;
                       and,

                  2)   All leases and subleases that are Coal Leases and other
                       leases in the SJCC Site Area as of August 30, 2000
                       (including private royalty obligations or retained
                       interests).

                  In addition, after termination of this Agreement, the
                  Utilities remain obligated to pay for all surface reclamation
                  associated with disturbance on the SJCC Site Area resulting in
                  any way from the supply of coal to the San Juan Station prior
                  to termination of this Agreement (including reclamation of
                  surface mining and the surface effects of underground mining)
                  and related liabilities, obligations and costs.

12.6     Expiration.
         A)       In the event the Parties fail to agree to extend this
                  Agreement pursuant to Section 2.5 "Extension", the Parties
                  have the obligation to negotiate diligently and in good faith
                  with a view to concluding a new agreement for the purchase and
                  sale of coal to be effective commencing at the expiration of
                  this Agreement.

         B)       Upon expiration as provided in Section 2 "Obligations of the
                  Parties and Term of Agreement", and in the event the Parties
                  have not reached agreement pursuant to Section 12.6(A), the
                  Utilities may elect one of the options identified in Section
                  12.5(A)(1), Section 12.5(A)(2) and Section 12.5(A)(3).

         C)       Notice of Election. Within thirty (30) days after expiration
                  of this Agreement, the Joint Committee will determine fair
                  market value and book value of SJCC's plant, capital equipment
                  and the Coal Leases and other leases in the SJCC Site Area,
                  including all of SJCC's permits and reclamation bonds. The
                  Joint Committee will not disband until it determines such
                  values. Within thirty (30) days after receipt of the Joint
                  Committee determination of value, the Utilities shall notify
                  SJCC in writing which of the above three options the Utilities
                  elect. In the event the Utilities elect the option identified
                  in Section 12.5(A)(1), SJCC shall, within thirty (30) days
                  after written notice of said election, deliver to Utilities a
                  sufficient bill of sale or other appropriate instrument of
                  conveyance, together with an invoice showing in reasonable

                                       45


                  detail the amount due, whereupon Utilities shall, within sixty
                  (60) days thereafter, remit to SJCC the amount due. In the
                  event Utilities shall elect the option identified in Section
                  12.5(A)(2), SJCC shall undertake to promptly dispose of its
                  plant and capital equipment, and interest in the Coal Leases
                  and other leases in the SJCC Site Area, including all of
                  SJCC's permits and reclamation bonds, and shall thereafter
                  invoice Utilities for the amount due SJCC (said invoice to
                  show in reasonable detail the amount, if any, received as a
                  result of said disposition, SJCC's book cost (net of
                  depreciation) and the balance due), whereupon Utilities shall,
                  within sixty (60) days after receipt of said invoice, remit to
                  SJCC the amount due SJCC.

         D)       Terms of Transfer and Liabilities Upon Expiration. Any
                  transfer of all of SJCC's rights, title and interest in and to
                  the Coal Leases and other leases in the SJCC Site Area,
                  including all of SJCC's permits and reclamation bonds, shall
                  be by an appropriate instrument of conveyance, with special
                  warranty covenants, subject to necessary consents, and such
                  assignment and/or transfer will become effective at the
                  earliest possible time after the expiration of this Agreement
                  or extension thereof. After expiration of this Agreement, the
                  Utilities remain obligated to pay for all reclamation and
                  related liabilities, obligations and costs pursuant to Section
                  7.3 "Reclamation Activities".

                                       46


                             Section 13 - Indemnity
                             ----------------------

13.1     Indemnity
         SJCC shall indemnify and save Utilities harmless from and shall defend
         them against any and all claims, demands or liabilities arising out of
         the operations of SJCC under this Agreement at the San Juan Station
         site or the SJCC Site Area, excepting those specified in Exhibit "F"
         "Operating Costs", and those claims, demands or liabilities arising out
         of the acts of Utilities, their employees, agents, contractors, and
         representatives.

         Utilities shall indemnify and save SJCC harmless from and defend it
         against any and all claims, demands or liabilities arising out of the
         operations of Utilities under this Agreement at the San Juan Station
         site or the SJCC Site Area, excepting those claims, demands or
         liabilities arising out of the acts of SJCC, its employees, agents,
         contractors and representatives.

         If a court of competent jurisdiction determines that the provisions of
         ss.56-7-1 or 2, N.M.S.A. (1978 Comp.), are applicable to this
         Agreement, then only to the extent that any indemnity agreement or any
         portion of an indemnity agreement contained herein would be deemed void
         or unenforceable under said provision(s), then to the narrowest extent
         possible, that portion of the agreement shall not extend to indemnify
         against liability, claims, damages, losses or expenses, including
         attorneys' fees, for or arising out of:

         A)       In the case that ss56-7-1, N.M.S.A. (1978 Comp.), is so
                  determined to be applicable,

                  1)   the preparation or approval of maps, drawings, opinions,
                       reports, surveys, change orders, designs or
                       specifications by the indemnified party or the agents or
                       employees of the indemnified party; or

                  2)   the giving of or the failure to give directions or
                       instructions by the indemnified party, or the agents or
                       employees of the indemnified party, where such giving or
                       failure to give directions or instructions is the primary
                       cause of bodily injury to persons or damage to property;
                       and,

         B)       In the case that ss56-7-2, N.M.S.A. (1978 Comp.), is so
                  determined to be applicable,

                  1)   the sole or concurrent negligence of the indemnified
                       party or the agents or employees of the indemnified party
                       or any independent contractor who is directly responsible
                       to the indemnified party; or

                  2)   any accident which occurs in operations carried on at the
                       direction or under the supervision of the indemnified
                       party or an employee or representative of the indemnified
                       party or in accordance with methods and means specified
                       by the indemnified party or employees or representatives
                       of the indemnified party.

                                       47



                        Section 14 - General Provisions
                        -------------------------------

14.1     Compliance with Applicable Laws
         SJCC shall conduct all of its operations under this Agreement in full
         compliance with all applicable laws, ordinances, regulations and
         directives of any and all governmental authorities having jurisdiction
         over such operations in conformity with the provisions of all licenses,
         permits and approvals; provided, however, that nothing herein shall be
         construed as prohibiting SJCC from contesting any such law, ordinance,
         regulation or directive or the provisions of any such license, permit
         or approval by appropriate judicial or administrative proceedings.

14.2     Labor Force
         A)       SJCC shall comply with the requirements of all civil rights
                  statutes and other federal and state employment laws which may
                  be applicable to its operations under this Agreement.

         B)       Except for any preferential treatment which may be accorded
                  Native American Indians (which treatment shall not violate
                  SJCC's obligations under Section 14.2(A), during the
                  performance of this contract SJCC agrees as follows:

                  1)   SJCC will not discriminate against any employee or
                       applicant for employment because of race, color,
                       religion, sex or national origin. SJCC will take
                       affirmative action to ensure that applicants are
                       employed, and that employees are treated during
                       employment, without regard to their race, color,
                       religion, sex or national origin. Such action shall
                       include, but not be limited to, the following:
                       employment; upgrading; demotion or transfer; recruitment
                       or recruitment advertising; layoff or termination; rates
                       of pay or other forms of compensation; and selection for
                       training, including apprenticeship. SJCC agrees to post
                       in conspicuous places, available to employees and
                       applicants for employment, notices to be provided by the
                       contracting officer setting forth the provisions of this
                       nondiscrimination clause.

                  2)   SJCC will, in all solicitations or advertisements for
                       employees placed by or on behalf of SJCC, state that all
                       qualified applicants will receive consideration for
                       employment without regard to race, color, religion, sex
                       or national origin.

                  3)   SJCC will send to each labor union or representative of
                       workers with which it has a collective bargaining
                       agreement or other contract or understanding, a notice to
                       be provided by the agency contracting officer, advising
                       the labor union or workers' representative of SJCC's
                       commitments under Section 202 of Executive Order No.
                       11246 of September 24, 1965, and shall post copies of the
                       notice in conspicuous places available to employees and
                       applicants for employment.

                                       48


                  4)   SJCC will comply with all provisions of Executive Order
                       No. 11246 of September 24, 1965, and of the rules,
                       regulations and relevant orders of the Secretary of
                       Labor.

                  5)   SJCC will furnish all information and reports required by
                       Executive Order No. 11246 of September 24, 1965, and by
                       the rules, regulations and orders of the Secretary of
                       Labor, or pursuant thereto, and will permit access to its
                       books, records and accounts by the Secretary of Labor for
                       purposes of investigation to ascertain compliance with
                       such rules, regulations and orders.

                  6)   In the event of SJCC's noncompliance with the
                       nondiscrimination clauses of this contract or with any of
                       the said rules, regulations or order, this contract may
                       be canceled, terminated or suspended, in whole or in
                       part, and SJCC may be declared ineligible for further
                       Government contracts in accordance with procedures
                       authorized in Executive Order No. 11246 of Sept. 24,
                       1965, and such other sanctions may be imposed and
                       remedies invoked as provided in Executive Order No. 11246
                       of September 24, 1965, or by rule, regulation or order of
                       the Secretary of Labor, or as otherwise provided by law.

                  7)   SJCC will include the provisions of Sections 14.2 (B)(1)
                       through (7) in every subcontract or purchase order unless
                       exempted by rules, regulations or orders of the Secretary
                       of Labor issued pursuant to Section 204 of Executive
                       Order No. 11246 of September 24, 1965, so that such
                       provisions will be binding upon each subcontractor or
                       vendor. SJCC will take such action with respect to any
                       subcontract or purchase order as may be directed by the
                       Secretary of Labor as a means of enforcing such
                       provisions, including sanctions for noncompliance;
                       provided, however, that in the event SJCC becomes
                       involved in, or is threatened with, litigation with a
                       subcontractor or vendor as a result of such direction,
                       SJCC may request the United States to enter into such
                       litigation to protect the interest of the United States.

         C)       The Parties agree to the extent authorized by law that no
                  party will seek an independent contractual remedy based upon
                  Section 14.2(B)(6) of this Agreement unless such remedy is
                  necessary to effectuate a party's compliance with Federal law
                  or applicable regulations. The Parties acknowledge that this
                  Section 14.2(C) is not intended to conflict with Federal law
                  or limit enforcement authority of the Secretary of Labor or
                  other governmental authority. If this Section 14.2(C) is ever
                  legally determined to violate or conflict with Executive Order
                  No. 11246 of September 24, 1965, its implementing regulations,
                  or other Federal laws or regulations, then this Section 14.2
                  (C) will be of no force and effect, and will be severed from
                  this Agreement, and, the remainder of the Agreement will be
                  treated pursuant to Section 14.17 "Severability".

                                       49


14.3     Confidentiality / Non-disclosure
         The terms and conditions, including those dealing with compensation,
         set forth in this Agreement are considered by Utilities and SJCC to be
         confidential and proprietary information and none of the Parties shall
         disclose any such information to any third party other than the
         attorneys, auditors and agents of Utilities, other owners of the San
         Juan Station, and SJCC, without the advance written consent of the
         other Parties; provided, however, disclosure may be made without
         advance consent where, in the opinion of counsel, such disclosure may
         be required by order of court or regulatory agency, law or regulation
         or in connection with judicial or administrative proceedings involving
         a party hereto, in which event the party to make such disclosure shall
         advise the other in advance as soon as possible and cooperate to the
         maximum extent practicable to minimize the disclosure of any such
         information (including, where practicable, deletion of portions of this
         Agreement, and, specifically, Section 8 "SJCC Compensation").

         Utilities shall maintain with the owners of the San Juan Station other
         than the Utilities written confidentiality agreements that are
         acceptable to SJCC prior to the disclosure of the terms of this
         Agreement.

14.4     The Utilities' Duties and Obligations Shall be Joint and Several
         The Utilities' duties and obligations under this Agreement shall be
         joint and several.

14.5     Permits and Approvals
         SJCC will use its best efforts to acquire any and all permits, licenses
         and approvals required by any governmental agency or regulatory body to
         enable SJCC to carry on the operations contemplated by this Agreement,
         including but without limitation, permits under the "Surface Mining
         Control and Reclamation Act of 1977" (Pub.L. 95-87, August 3, 1977);
         provided however, that Utilities will cooperate fully with SJCC and
         supply information necessary to obtain all permits, licenses and
         approvals.

14.6     Waivers
         A waiver by a party at any time of its rights with respect to a default
         under this Agreement, or with respect to any other matter in connection
         with this Agreement, shall not be deemed a waiver with respect to any
         other subsequent default or matter. No delay, short of the statutory
         period of limitation, in asserting or enforcing any right hereunder
         shall be deemed a waiver of or limitation on such right.

14.7     Insurance
         SJCC and Utilities, for the benefit of the other, shall take out and
         maintain in force during the term of this Agreement the insurance
         described below covering their operations in respect of which this
         Section 14.7 applies. The Parties shall insure with one or more
         insurance companies satisfactory to the other or self insure by means
         of a self insurance program acceptable to the other, and each party
         shall submit to the other satisfactory evidence of said insurance or
         self insurance. Said insurance shall not be cancelled or materially
         changed with less than thirty (30) days prior written notice to the
         other party hereto and the certificates shall so provide. The insurance
         required is the following:

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         A)       Workmen's Compensation and Employer's Liability Insurance as
                  required under applicable law, including, as appropriate,
                  obligation to provide Black Lung disease benefits under the
                  Federal Coal Mine Health and Safety Act.

         B)       Automobile Liability Insurance, or the equivalent, covering
                  claims from third parties arising from the operation of
                  automobiles.

         C)       Property Insurance providing all risk replacement cost
                  coverage for real and personal property damage, including
                  damage to equipment.

         D)       Commercial General Liability Insurance, or the equivalent,
                  (including blanket contractual liability coverage with respect
                  to this Agreement) including defense costs for claims for
                  damages to third parties because of bodily injury, property
                  damage, personal and advertising injury, including products
                  and completed operations.

         E)       Umbrella and /or Excess Liability Insurance, or the
                  equivalent, including claims in excess of scheduled underlying
                  policies.

         F)       Fidelity Insurance, or the equivalent, covering loss arising
                  out of fraudulent or dishonest acts of employees.

         G)       ERISA Fidelity, or the equivalent, covering loss arising out
                  of fraudulent or dishonest acts of employees related to
                  retirement plans as required by ERISA.

         H)       Fiduciary Liability Insurance, or the equivalent, covering
                  claims arising from wrongful acts.

         It shall be the responsibility of the Joint Committee to review the
         insurance coverage before July 31, 2003, and then no less often than
         every five (5) years thereafter, and to determine adequate limits and
         coverages for the then current conditions.

14.8     Notices
         A)       Any notice, demand or request provided for in this Agreement,
                  or given or made in connection with this Agreement, except
                  those normal exchanges of information required by the
                  Coordinating Committee and the Joint Committee, shall be in
                  writing, signed by an officer of the party giving such notice
                  and shall be deemed to be properly and sufficiently given or
                  made if sent by registered or certified mail, and if to SJCC,
                  addressed as follows:

                           San Juan Coal Company
                           300 West Arrington, Suite 200
                           Farmington NM, 87401
                           Attention: President

                  with a copy addressed as follows:

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                           San Juan Coal Company
                           Post Office Box 155
                           Fruitland, NM 87416
                           Attention:  San Juan Mine Manager

                  and if to Utilities, addressed as follows:

                           Public Service Company of New Mexico
                           Alvarado Square
                           Albuquerque, NM 87158
                           Attention:  Corporate Secretary

                  and

                           Tucson Electric Power Company
                           Post Office Box 711
                           Tucson, AZ 85702
                           Attention:  Secretary

         B)       Any party hereto may change its address for notice by so
                  advising the other Parties hereto in accordance with the
                  provisions of this Section 14.8. Any notice given in
                  accordance with the provisions of this Section 14.8 shall be
                  deemed effectively given as of the date of its deposit with
                  the United States Postal Service.

         C)       Exchanges of information required by the Coordinating
                  Committee and the Joint Committee shall be by procedures set
                  forth by the respective committee.

14.9     Choice of Law
         The terms and provisions of this Agreement shall be interpreted and
         construed in accordance with the laws of the State of New Mexico,
         without regard to conflict of law principles.

14.10    Assignment
         A)       This Agreement may not be assigned or subcontracted by SJCC
                  without the consent of Utilities, except that no consent shall
                  be required in event of an assignment of amounts receivable
                  hereunder to a bank or lending institution, or a collateral
                  assignment for purposes of securing indebtedness, or a
                  transfer under or pursuant to a mortgage, deed of trust or
                  indenture (including, without limitation, a transfer by
                  foreclosure or a sale under the power of sale contained in any
                  such mortgage, deed of trust or indenture), or a transfer to a
                  successor in interest, by merger, consolidation, sale and
                  transfer, or otherwise, acquiring all or substantially all of
                  the assets and business of SJCC, and except for transfer to a
                  subsidiary as herein below provided; provided, however, that
                  any assignee, successor in interest or transferee hereunder
                  shall first guarantee performance of this Agreement in a
                  manner satisfactory to Utilities.

         B)       This Agreement may not be assigned by Utilities without the
                  consent of SJCC, except that no consent shall be required in
                  event of an assignment or transfer under and pursuant to a

                                       52


                  mortgage, deed of trust or indenture (including, without
                  limitation, a transfer by foreclosure or a sale under the
                  power of sale contained in any such mortgage, deed of trust or
                  indenture), or an assignment to a successor in interest, by
                  merger, consolidation, sale and transfer, or otherwise,
                  acquiring all or substantially all of the business and assets
                  of any of the Utilities and except for transfer to a
                  subsidiary as herein below provided; provided, however, that
                  any assignee, successor in interest or transferee hereunder
                  shall first guarantee performance of this Agreement in a
                  manner satisfactory to SJCC.

         C)       Any party hereto may without the consent of any other party,
                  assign this Agreement to a majority-owned subsidiary
                  corporation or to a wholly-owned subsidiary of its parent
                  provided that the assigning party shall guarantee performance
                  of this Agreement by such subsidiary.

         D)       Consent to assignment hereunder shall not be unreasonably
                  withheld by any party hereto.

14.11    Successors and Assigns
         Subject to Section 14.10 "Assignment", this Agreement and all of the
         obligations and rights herein established shall extend to and be
         binding upon, and shall inure to the benefit of, the respective
         successors and assigns of the respective Parties.

14.12    Authorizations
         The execution and performance by the Parties of this Agreement have
         been duly authorized for each party by all necessary corporate action,
         require no other authorization, consent or approval and do not
         contravene any law or contractual restriction binding on the Parties.

14.13    Amendments
         This Agreement may be amended only by written instrument executed by
         all of the Parties with the same formality as this Agreement.

14.14    Construction
         The terms and conditions of this Agreement are the result of
         negotiation and drafting on an equal footing by the Parties and their
         legal counsel. This Agreement shall be construed evenhandedly and
         without favor or predisposition to any party. The titles of sections in
         this Agreement have been inserted as a matter of convenience or for
         reference only, and they shall not control or affect the meaning or
         construction of any of the terms and provisions hereof.

14.15    Entire Agreement
         This Agreement supersedes all prior agreements and representations
         between the Parties, whether written or oral, with respect to the
         subject matter of this Agreement and is intended as a complete and
         exclusive statement of the terms of the agreement between the Parties
         with respect to the subject matter. Except as specifically set forth in
         this Agreement, no representations have been made to induce any of the
         Parties to enter into this Agreement. All Exhibits are incorporated by
         reference as part of this Agreement.

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14.16    Waiver of Consequential Damages.
         SJCC and the Utilities waive any recovery of consequential damages
         related to the breach of this Agreement.

14.17    Severability
         In the event that any of the terms or conditions of this Agreement, or
         the application of any such term or condition to any person or
         circumstance, shall be held invalid by an arbitration panel constituted
         under this Agreement or any court having jurisdiction in the premises,
         the remainder of this Agreement, and the application of such terms or
         conditions to persons or circumstances other than those as to which it
         is held invalid, shall not be affected thereby, except that the
         provisions in the remainder of this Agreement shall be construed, and
         modified where necessary, to effectuate the intentions of the Parties
         and provide them with the benefit of their bargain.

14.18    Survival of Provisions
         The Parties agree that those provisions that describe the Parties'
         post-expiration and post-termination rights and obligations shall
         survive termination or expiration of this Agreement. In addition, those
         provisions and Exhibits referenced in, or necessary to implement, the
         provisions that describe the Parties' post-termination or
         post-expiration rights and obligations also shall survive.

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                            Section 15 - Signatures
                            -----------------------

           IN WITNESS WHEREOF, the Parties hereto have caused this Agreement to
           be executed on their behalf by their respective officers, thereunto
           duly authorized.


         PUBLIC SERVICE COMPANY OF NEW MEXICO


         By: /s/ Patrick J. Goodman.                                   8/29/01
             ----------------------------------------                  -------
              Patrick J. Goodman, Vice President                       Date



         TUCSON ELECTRIC POWER COMPANY


         By: /s/ Kevin Larson.......                                   8/31/01
             -------------------------------------------------         -------
              Kevin Larson, Vice President                             Date



         SAN JUAN COAL COMPANY


         By: /s/ John W. Grubb......                                   8/29/01
             ----------------------------------------                  -------
              John W. Grubb, President                                 Date



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