COTEAU LIGNITE SALES AGREEMENT dated as of January 1, 1990 by and between THE COTEAU PROPERTIES COMPANY and DAKOTA COAL COMPANY 1 CONTENTS 2

EXHIBIT A

EXHIBIT B

EXHIBIT C

EXHIBIT D

EXHIBIT E

EXHIBIT F

EXHIBIT G

EXHIBIT H

THIS COTEAU LIGNITE SALES AGREEMENT (Agreement) dated as of January 1, 1990, is by and between THE COTEAU PROPERTIES COMPANY, an Ohio corporation authorized to do business in the State of North Dakota (Coteau) and DAKOTA COAL COMPANY, a North Dakota corporation (Dakota).

WHEREAS, Coteau is a party to the Restatement of Coal Sales Agreement dated as of June 1, 1979, as subsequently amended (the Coal Sales Agreement), by and between Coteau and ANG Coal Gasification Company (ANG);

WHEREAS, as of November 1, 1988, ANG assigned, and Dakota assumed, all of ANG's rights, interests and obligations pursuant to and under the Coal Sales Agreement;

WHEREAS, Dakota has entered into an agreement entitled “Coal Sales Agreement” dated as of November 1, 1988 with Basin Electric Power Cooperative (Basin Electric) pursuant to which Dakota is selling lignite to Basin Electric for use by Basin Electric in its Antelope Valley Station, which consists of two 450 MW generating units and is located near Beulah, North Dakota;

WHEREAS, Dakota has also entered into the Coal Supply Agreement dated as of November 1, 1988 with Dakota Gasification Company (DGC) pursuant to which Dakota is selling lignite to DGC for use by DGC in its Great Plains Coal Gasification Plant, the first phase of which consists of a Lurgi lignite gasification facility with the capability of producing approximately 160 MMSCF of pipeline quality synthetic natural gas per day and is located on a site adjacent to Basin Electric's Antelope Valley Station;

WHEREAS, Dakota may enter into another agreement with Basin Electric or an Affiliate (as hereinafter defined) of Basin Electric pursuant to which Dakota will supply to Basin Electric all of the lignite to be used by Basin Electric in any expansion of the electrical generating capability at the Antelope Valley Station;

WHEREAS, Dakota may enter into another agreement with DGC or an Affiliate of DGC pursuant to which Dakota will supply to DGC all of the lignite used by DGC in any expansion of the Great Plains Coal Gasification Plant;

WHEREAS, Dakota intends to enter into another agreement with Basin Electric or an Affiliate of Basin Electric pursuant to which Dakota will supply to Basin Electric or an Affiliate of Basin Electric the portion of the lignite used at Basin Electric's Leland Olds Station, which consists of a 215 MW generating unit and a 440 MW generating unit and is located near Stanton, North Dakota, which is not supplied by the Glenharold Mine;

WHEREAS, Dakota hopes to enter into agreements with other third parties pursuant to which Dakota will provide all or a portion of the lignite used by said third parties' facilities; and

WHEREAS, in light of the foregoing, the Coal Sales Agreement is being terminated by Coteau and Dakota simultaneously in connection with the execution and delivery of this Agreement, and Coteau and Dakota desire that this Agreement supersede and replace the Coal Sales Agreement.

NOW, THEREFORE, Coteau and Dakota agree as follows:

Additional Dedicated Lignite shall mean those lignite reserves in the areas outside of the Primary Dedicated Lignite which, pursuant to Section 3.3 hereof, are made part of the Dedicated Lignite pursuant to this Agreement by being hereafter (a) acquired or held by Dakota or an Affiliate of Dakota, which then are acquired by, or transferred or subleased to Coteau or (b) acquired by Coteau at the direction of Dakota.

Affiliate shall mean any other person who, directly or indirectly, through ownership of securities, contract or otherwise, controls, is controlled by or is under common control with another person.

Agreed Profit shall have the meanings ascribed to the term in Sections 5.4, 5.5 and 5.7 hereof.

ANG shall mean ANG Coal Gasification Company, a Delaware corporation authorized to do business in the State of North Dakota and a second tier wholly owned subsidiary of Basin Electric.

Basic Agreement shall mean the Basic Agreement dated March 6, 1973, between North American Coal and Michigan Wisconsin Pipe Line Company. Pursuant to an Assignment Agreement dated July 1, 1975, Michigan Wisconsin Pipe Line Company assigned all of its rights and obligations under said Basic Agreement to American Natural Gas Production Company. Pursuant to an Assignment Agreement dated November 2, 1977, American Natural Gas Production Company assigned all of its rights and obligations under said Basic Agreement to WCDC. The Basic Agreement was subsequently restated pursuant to the Restatement of Basic Agreement dated as of June 1, 1979. Subsequently, the Restatement of Basic Agreement was terminated and replaced by the Coal Reserve Agreement. Pursuant to the Coal Reserve Agreement, WCDC transferred its obligations under the Restatement of Basic Agreement to ANG.

Basin Electric shall mean Basin Electric Power Cooperative, a North Dakota electric cooperative corporation.

Business Day shall mean any day other than a Saturday, Sunday or day on which banks in North Dakota or New York City are required or authorized to be closed.

Coal Reserve Agreement shall mean the Coal Reserve Agreement made and entered into as of March 2, 1987, by and among Coteau, Dakota (as successor in interest to ANG), North American Coal, The Missouri Valley Properties Company and WCDC.

Coal Sales Agreement shall mean the Restatement of Coal Sales Agreement dated as of June 1, 1979, and as subsequently amended, by and between Coteau and Dakota (as successor in interest to ANG).

Cost of Production shall have the meaning ascribed to the term in Section 5.2 hereof.

Coteau shall mean The Coteau Properties Company, an Ohio corporation authorized to do business in the State of North Dakota and a wholly owned subsidiary of North American Coal.

Coteau's Mine shall mean all mining areas developed by Coteau in the Dedicated Lignite.

Dakota shall mean Dakota Coal Company, a North Dakota corporation and a wholly owned subsidiary of Basin Electric.

Dakota's Other Plants shall mean all additional generating units installed by Basin Electric which increase the original generating capacity of the Antelope Valley Station and all additional gasifiers as well as the incremental increased capacity achieved by replacing one or more of the existing gasifiers with a replacement gasifier having a capacity greater than the gasifier being replaced at or near the Great Plains Coal Gasification Plant.

Dakota's Plants shall mean collectively Dakota's Primary Plants, Dakota's Secondary Plant, Dakota's Other Plants and Other Plants.

Dakota's Primary Plants shall mean collectively the Antelope Valley Station, consisting of two 450 MW generating units named Units 1 and 2 and located near Beulah, North Dakota, which is controlled and operated by Basin Electric, and the Great Plains Coal Gasification Plant, the first phase of which consists of a Lurgi lignite gasification facility with the capability of producing approximately 160 MMSCF of pipeline quality synthetic natural gas per day and is located on a site adjacent to the Antelope Valley Station, which is owned and operated by DGC.

Dakota's Requirements shall mean (a) all of the coal requirements of Dakota's Primary Plants and Dakota's Other Plants, (b) except as otherwise provided by Section 2.1 hereof, the portion of the coal used at Dakota's Secondary Plant which is not supplied by the Glenharold Mine and (c) the portion of the coal requirements of Other Plants which Dakota desires Coteau to supply.

Dakota's Secondary Plant shall mean the Leland Olds Station, consisting of a 215 MW generating unit and a 440 MW generating unit, owned by Basin Electric and located near Stanton, North Dakota.

Dedicated Lignite shall mean collectively the Primary Dedicated Lignite and the Additional Dedicated Lignite.

Development Period shall mean, with respect to the development of any mining area of Coteau's Mine for Dakota's Plants, the period from the date of Dakota's written approval of the Mining Plan with respect to such mining area until such date that Dakota shall designate.

DGC shall mean Dakota Gasification Company, a North Dakota corporation and a wholly owned subsidiary of Basin Electric.

Emergency Expenditures shall mean expenditures for Coteau’s Mine which, in the reasonable judgment of Coteau, are necessary as a result of explosion, fire, flood or other emergency and the delay of which, in order to secure Dakota’s prior approval, would either jeopardize life or substantial property of Dakota or Coteau, or result in a material interruption of Couteau’s Mine production.

Escrowed Stock shall mean the one hundred (100) shares of common stock, without par value, issued and outstanding of Coteau.

Glenharold Mine shall mean the lignite reserves delineated in Exhibit A hereto which by this reference is made a part hereof.

Index shall mean the average [* * *] on the base 1982 = 100, published by the Bureau of Labor Statistics of the U.S. Department of Labor, for the twelve (12) months of said calendar year. The base for calculating changes in the Index in Subsections 5.5(a), 5.5(b) and 5.5(c) hereof shall be the Producer Price Index - All Commodities for July, 1988.

Loans and Leases shall have the meaning ascribed to the term in Section 10.1 hereof.

Mining Plan shall mean the mining plan furnished to and approved by Dakota in accordance with Section 4.1 hereof and updated pursuant to such Section.

North American Coal shall mean The North American Coal Corporation, a Delaware corporation authorized to do business in the State of North Dakota (formerly Nortex Mining Company).

Option Agreement shall mean the Option and Put Agreement dated as of January 1, 1990, by and among Dakota, North American Coal and the State of North Dakota doing business as the Bank of North Dakota.

Other Plants shall mean any other facility owned by a third party for which Dakota shall contract to provide lignite.

Party shall mean either Coteau or Dakota as indicated by the context.

Parties shall mean Coteau and Dakota.

Premature Termination Mine Closing Costs shall have the meaning ascribed to the term in Section 14.2 hereof.

Primary Dedicated Lignite shall mean those lignite reserves within the areas of interest described in Exhibit B hereto which by this reference is made a part hereof which areas may be changed from time to time pursuant to Section 3.3 hereof.

Primary Truck Dump shall mean the facility presently located at Couteau’s Mine where mine-run lignite is dumped and subsequently crushed before delivery to the Secondary Crusher Building.

Production Payment shall have the meaning ascribed to the term in Section 5.7 hereof.

Secondary Crusher Building shall mean the building constructed by Coteau to house the secondary crusher and to accommodate the transfer of lignite from the Primary Truck Dump to Dakota’s Primary Plants.

Sub-Quality Lignite shall mean lignite with an average calorific content of less than six thousand two hundred (6,200) BTUs per pound on an as-received basis.

Such average computations shall be based upon the analyses of representative samples taken in accordance with the provisions of Subsection 5.5(d) and Section 9.1 hereof.

Ton shall mean a net ton of two thousand (2,000) pounds.

WCDC shall mean ANR Western Coal Development Company, a Delaware corporation.

As necessary, Dakota shall consult with Coteau as to projected increases and decreases in Dakota’s Requirements on a long-range basis. If Dakota desires to increase the annual lignite deliveries for any calendar year by more than ten percent (10%) of the preceding year’s lignite requirements, Dakota shall provide Coteau with a written estimated schedule of Dakota’s Requirements on an annual basis for the succeeding five (5) calendar years, including the estimated deliveries from Coteau's Mine for each of Dakota’s Plants. The lignite quantities set forth in such schedule shall be within the limits of Coteau’s productive capability, provided that when any increase in estimated lignite requirements occurs which necessitates the acquisition by Coteau of additional equipment, Coteau shall not be obligated to supply such increased requirements until such time as it is able to acquire and install such additional equipment and do all other things necessary to supply such increased requirements.

The lignite to be sold and delivered hereunder shall be from Coteau's Mine and shall be mine-run lignite. Coteau shall make all reasonable efforts to avoid shipping extraneous impurities and, upon request of and reasonable written notice from Dakota, shall install lignite cleaning facilities specified by Dakota. Coteau shall not mine lignite from any area estimated by Coteau and Dakota to contain Sub-Quality Lignite unless Dakota shall have given its prior written consent.

Dakota shall have the right to reject Sub-Quality Lignite, provided that Dakota shall not have the right to reject Sub-Quality Lignite mined with its consent from an area estimated to contain Sub-Quality Lignite pursuant to Section 3.1 hereof. If Coteau delivers Sub-Quality Lignite without receiving Dakota's prior written consent pursuant to Section 3.1 hereof, Dakota shall have the right, on notice to Coteau confirmed in writing, to suspend deliveries of lignite until Coteau establishes that it will meet specifications. Any Sub-Quality Lignite so rejected and not utilized or sold by Dakota shall be excluded from the tonnages upon which Coteau's Agreed Profit is based.

The lignite to be sold and delivered hereunder shall be from the Dedicated Lignite. At the written direction of Dakota from time to time the geographic boundaries of the Dedicated Lignite may be modified to reflect the addition of Additional Dedicated Lignite to the Dedicated Lignite. At the written direction of Dakota from time to time the geographic boundaries of Primary Dedicated Lignite may be modified to reflect additions to the Primary Dedicated Lignite. With the mutual written approval of Coteau and Dakota, the geographic boundaries of the Dedicated Lignite may be modified from time to time to reflect deletions from the Dedicated

Lignite. With the mutual written approval of Coteau and Dakota, the geographic boundaries of the Primary Dedicated Lignite also may be modified from time to time to reflect deletions from the Primary Dedicated Lignite.

From time to time at Dakota's request, Coteau shall provide to Dakota in writing a Mining Plan to furnish Dakota's Requirements from the Dedicated Lignite. The Mining Plan shall be in accordance with sound engineering and design practices and applicable laws, rules and regulations and shall include production schedules, manpower and equipment requirements, estimated costs per Ton, time schedules for mine development, estimated dates of initial production and full production, method of operation, including method of operation of any lignite handling facilities, reclamation and permitting schedules, capital expenditure and operating cost requirements, mine design, mine projection maps, mine progression and reserve studies and such other data as may be reasonably requested by Dakota. The Mining Plan shall be in such detail and format as may be reasonably requested by Dakota. Within seventy-five (75) days after receipt by Dakota of such Mining Plan, Dakota shall give Coteau written notice of Dakota's approval or disapproval of the Mining Plan. If Dakota does not give such notice within such seventy-five (75) days, Dakota shall be deemed to have approved such Mining Plan. If Dakota disapproves the Mining Plan or any portion(s) thereof, Dakota shall state in detail in its notice of disapproval the reason(s) for such disapproval and Coteau and Dakota shall meet promptly and attempt in good faith to settle their differences with respect to the Mining Plan. If Coteau and Dakota are unable to resolve their differences within thirty (30) days after Coteau's receipt from Dakota of such notice of disapproval, Dakota may reasonably direct Coteau, subject to Section 16.4 hereof, as to the revisions to be made in the Mining Plan and Coteau shall make such revisions. The Mining Plan shall be reviewed and revised or expanded annually (or as necessary) with the written approval of Dakota. Such revisions shall be based upon the then current projections developed by Coteau and requirements of applicable law, rules and regulations and shall be subject to approval by Dakota as provided above. No material modification of or deviation from the Mining Plan shall be made without the written approval of Dakota, which approval shall not be unreasonably withheld. It is recognized by the Parties that, subject to the duties imposed upon Coteau pursuant to Section 16.4 hereof, Coteau may make minor modifications of or deviations from the Mining Plan without Dakota's approval. Coteau shall consult with and keep Dakota informed of the progress of the design, development and operation of Coteau's Mine and shall, upon Dakota's request, furnish to Dakota copies of all major and significant drawings and documents relating to such design, development and operation.

Coteau shall furnish to Dakota, on a time schedule agreed to by the Parties, the following budgets and cash flow for activities pursuant to this Agreement during the following calendar year:

Coteau shall not make any expenditures unless they are generally reflected in a budget, or portion thereof, approved by Dakota as aforesaid; nor shall Coteau make any single expenditure (except for expenditures made to maintain inventory levels as approved by Dakota from time to time) for materials, supplies, equipment, facilities or services in excess of $10,000, or enter into any contracts, agreements or commitments involving more than $10,000, unless such item has been specifically identified in a budget, or portion thereof, approved by Dakota or unless Dakota has otherwise approved thereof.

Any expenditures made by Coteau for capital items which are not made in accordance with the immediately preceding paragraph shall be deemed to have been made for the account of Coteau and shall not be recoverable from Dakota under any of the other provisions of this Agreement. Coteau shall have the right in its sole discretion to dispose of any capital items which are deemed to have been made for the account of Coteau.

Notwithstanding anything to the contrary contained in this Agreement, Coteau shall have the right during any calendar year to make Emergency Expenditures without advance approval by Dakota, provided that Coteau shall subsequently and promptly give Dakota written notice thereof.

If, at any time while an operating budget as approved by Dakota is in effect and Dakota, in good faith, believes that Coteau is not in compliance with any of the provisions of such operating budget, Dakota shall have the right to give Coteau notice of such noncompliance. Such notice shall be in writing and identified as a "Notice of Noncompliance Pursuant to Section 4.3 of the Coteau Lignite Sales Agreement dated as of January 1, 1990", shall cite the provision(s) of the operating budget as to which Dakota believes Coteau is not in compliance, shall state in detail the reasons why Dakota so believes Coteau is not in compliance and shall include all other pertinent information.

No later than fifteen (15) Business Days after Couteau’s receipt of such notice of noncompliance, Coteau shall either (a) give Dakota written notice that Coteau denies that such noncompliance has occurred or is occurring or (b) correct such noncompliance; provided, however, that if Coteau within five (5) Business Days after Coteau's receipt of such notice of noncompliance from Dakota gives Dakota notice confirmed in writing that Coteau needs more than fifteen (15) Business Days in order to correct the noncompliance(s) cited in such notice, together with reasons therefor, Dakota shall give Coteau such reasonable extension as may be necessary in order to make such correction(s).

If Coteau gives Dakota notice denying such noncompliance, Coteau and Dakota shall meet promptly and attempt in good faith to settle their differences. Any matter agreed upon by Coteau and Dakota with respect

to such operating budget which requires implementation shall be implemented promptly. If Coteau and Dakota are unable to resolve their differences within thirty (30) days after Dakota’s receipt of notice from Coteau denying such noncompliance, either Party may submit the matter to arbitration as provided in Section 16.2 hereof. If arbitration is sought, Coteau shall not be deemed to be in noncompliance and shall not be required to correct any noncompliance until the matter shall have been determined finally in accordance with the aforesaid arbitration provisions.

If the noncompliance is not corrected or resolved by Coteau and Dakota as aforesaid and (x) arbitration is not so sought, or (y) Coteau subsequently is found in arbitration proceedings to be in noncompliance, then all costs incurred by Coteau following the expiration of five (5) Business Days after Coteau's receipt of notice of noncompliance from Dakota, including costs incurred during the period prior to the completion of any arbitration proceeding, and which costs result directly from such noncompliance with the operating budget as specified in said notice of noncompliance from Dakota, shall be disallowed up to an amount equal to the Agreed Profit due to Coteau for lignite produced during the period of disallowance and computed in accordance with Section 5.4 hereof. Subject to the provisions of Section 16.4 hereof, such disallowance shall be Dakota’s exclusive remedy for such noncompliance.

Coteau shall develop a change order procedure acceptable to Dakota. Change orders consistent with such procedures shall be submitted by Coteau to Dakota for Dakota’s approval for (a) any change in the annual operating budget, as approved by Dakota, resulting from changes requested in writing by Dakota in the lignite quantities or design criteria contained in the annual operating budget, (b) any factor which results in a change in the current delivery schedule for lignite and (c) any predicted or actual increase in the annual operating budget, as approved by Dakota.

Coteau and Dakota shall meet periodically to review the progress of the design, development and operation of Coteau's Mine. Coteau and Dakota anticipate these meetings will be held quarterly. Prior to such meetings, Coteau shall submit to Dakota in a format acceptable to Dakota, such reports, schedules and operating and financial data as may be reasonably requested by Dakota.

Coteau and Dakota shall cooperate to establish, maintain and use a cost and schedule control system with respect to the development of Coteau's Mine adequate for (a) the preparation of a project schedule which shall facilitate the planning of the development of Coteau's Mine and demonstrate production date impact resulting from schedule slippages, if any, in the development of Coteau's Mine, and (b) a cost control system and a physical progress data reporting system which (i) provide actual cost and scheduling status reports to Dakota for the immediately preceding calendar month by the fifteenth (15th) Business Day of every month in which development of Coteau's Mine is in progress, (ii) report the actual progress of the development of Coteau's Mine relative to the Mining Plan and such other schedules as Dakota shall designate and (iii) provide adequate audit trail information. Such control system may include the preparation by Coteau, as requested by Dakota, of the following documents in a format acceptable to Dakota:

1)     Budget Status Report

2)     Projected Expenditures Report (actual/projected)

3)     Cost and Comparison to Estimate Report

4)     Physical Progress Report

5)     Permit Status Report

6)     Project Status Report (written detail, all areas)

7)     Project Development Schedule (bar chart or time-oriented activity diagram);

or such other documents as requested by Dakota. Coteau shall notify Dakota in writing of any proposed changes in the cost and schedule control system previously approved by Dakota.

All materials, supplies, equipment, facilities and services, and all contracts, agreements and commitments therefor or in connection therewith required to construct, develop and operate Coteau's Mine shall be acquired, entered into or made only pursuant to formal procurement policies adopted by Coteau and acceptable to Dakota. Coteau shall notify Dakota in writing of any proposed material changes to formal procurement policies previously approved by Dakota.

Coteau shall have the right to pay dividends on the Escrowed Stock only from earned surplus.

Coteau shall maintain accurate books and records in accordance with generally accepted accounting principles and as necessary to support such detailed cost analyses, classifications and allocations as may be requested from time to time by Dakota.

Couteau’s accounting systems, policies and procedures shall conform to Dakota’s specifications, which shall be in accordance with generally accepted accounting principles, and shall be subject to Dakota’s approval. Coteau shall notify Dakota in writing of any proposed material changes to Couteau’s accounting systems, policies and procedures previously approved by Dakota. Couteau’s accounting system shall provide for cost classifications (chart of accounts) as requested by Dakota. Coteau shall develop a cash management system acceptable to Dakota which shall include the maintenance of separate cash accounts to the extent requested by Dakota.

Couteau’s accounting operations with respect to matters related to this Agreement shall be at such location as Dakota shall approve; provided, however, that Coteau shall have the right under this Agreement to conduct such other accounting operations and maintain such other accounting records and systems as Coteau deems necessary to be consistent with the accounting system of Affiliates of Coteau, the cost of which shall be included in the Cost of Production defined in Section 5.2 hereof.

Coteau shall develop formal written policies with respect to executive compensation plans, which policies shall be subject to approval of Dakota. Such approval shall not be withheld if such policies are consistent with those of North American Coal.

Expenditures by Coteau for memberships in national trade associations and state trade associations which are included in the Cost of Production shall be limited to one and two, respectively, unless expenditures for additional memberships are approved by Dakota. Coteau shall keep Dakota apprised of the activities of the trade associations of which Coteau is a member and shall use its influence as a member to support the causes of Dakota.

Coteau shall develop formal written policies with respect to matters such as travel and entertainment, overtime, labor reporting, attendance at seminars, meetings and schools, use of company aircraft and vehicles, mine-related cost allocation methods and equipment replacement policies, all of which policies shall be subject to approval by Dakota.

Coteau shall develop formal written policies with respect to employee insurance, ·relocation expense, vacation and retirement benefits, all of which policies shall be subject to approval by Dakota. Such approval shall not be withheld if such policies are consistent with those of North American Coal and generally consistent with those of the lignite mining industry.

Coteau shall develop formal written policies with respect to donations to charitable and civic organizations and corporate sponsorships, which policies shall be subject to approval by Dakota. Expenditures by Coteau for donations and sponsorships which are included in the Cost of Production shall be limited to not more than $10,000 per year, unless a higher amount is approved in writing by Dakota. Coteau shall provide Dakota a listing of estimated planned expenditures for donations and sponsorships for the following calendar year

by December 1.

Coteau shall notify Dakota in writing of any proposed material changes to such policies previously approved by Dakota.

Coteau shall consult with Dakota and consider the advice and counsel provided by Dakota before entering into any employment contracts or any contracts for the employment of consultants in its mining business other than contracts for professional services such as accounting services, architectural services and legal services which normally are performed by independent contractors.

Subject to the right of Dakota to determine the price during the Development Period pursuant to Section 5.3 hereof and to adjustment as provided in Sections 5.5 and 5.7 hereof, Dakota shall pay for the lignite sold and delivered hereunder a price which annually equals the Cost of Production, as defined in Section 5.2 hereof, plus the Agreed Profit as determined pursuant to Sections5.4, 5.5 and 5.7 hereof.

For the purposes of this Agreement, except as otherwise expressly stated, "Cost of Production" shall mean all the costs actually incurred by Coteau in the design, development, construction and operation of Coteau's Mine and the mining, processing and delivery of lignite under this Agreement. Such costs shall be determined and allocated on an accrual basis in accordance with generally accepted accounting principles (except as otherwise expressly stated herein), consistently applied and shall include but not be limited to the following:

There shall be credited to costs under this Subsection 5.2(a): (y) any investment tax credit or other tax credits based upon new investment taken by Coteau and any net receipts by Coteau from rental of, or other net income derived by Coteau from, property including surface lands overlying the Dedicated Lignite, and (z) all amounts disallowed in accordance with the last paragraph of Section 4.3 hereof. There shall be credited to costs under this Subsection 5.2(a) any gains, and so charged any losses, on the disposal of any property owned by Coteau related to Couteau’s Mine or the Dedicated Lignite.

If any of the foregoing items in Subsections 5.2(a) and 5.2(b) hereof include costs incurred by an Affiliate of Coteau and charged to Coteau, they shall be included only at the cost to such Affiliate without addition for any loading, inter-company profit or service charge and shall be allocated to Coteau on the basis of time spent or (in the case of buildings) space used.

d) Loan and Lease Expense. Interest on indebtedness and loan and lease commitment fees to the extent not previously paid by Dakota during the Development Period currently due and payable, and amortization of other expenses incurred in connection with Coteau obtaining loans or leases (to the extent not otherwise provided for under Subsection 5.2(c) hereof), accrued by Coteau with respect to such loans and leases, less interest or dividends received by Coteau on its investments.

e) Protective Provisions. If Coteau files consolidated tax returns with an Affiliate or Affiliates of Coteau, it shall collect from such Affiliate or Affiliates any net tax benefit derived by any such Affiliate from such consolidation attributable to Coteau. If Coteau has any surplus cash, it shall invest it in income producing securities or, if requested by Dakota, use such excess to repay indebtedness of Coteau.

Notwithstanding the foregoing, "Cost of Production" shall specifically exclude fines and penalties imposed

by any governmental agency, administration, commission or body, with the exception of (i) a fine or penalty imposed by a governmental agency, administration, commission or body regulating the mining of lignite or the reclamation of mined lignite lands or (ii) a fine or penalty imposed by any governmental agency, administration, commission or body on activities or conduct specifically directed or otherwise approved by Dakota or one of its Affiliates.

Dakota shall determine the price to be paid during each Development Period for the lignite sold and delivered hereunder from the relevant portion of Coteau's Mine, which price shall not be less per Ton of lignite than the prior calendar year's Cost of Production per Ton of lignite and which shall be deemed to include the Agreed Profit with respect to lignite delivered from such portion of Coteau's Mine. During each Development Period, the excess of the Cost of Production over the price (less Agreed Profit) paid for such lignite shall be capitalized, for purposes of determining subsequent price. The amount so capitalized shall be recovered by inclusion in the Cost of Production pro rata commencing at the end of each Development Period over a period, designated by Dakota, which shall not be longer than the estimated life of the particular mining area.

For the first [* * *] Tons of lignite sold and delivered from the Dedicated Lignite for use at Dakota's Primary Plants following the date of this Agreement, the Agreed Profit per Ton, after adjustment pursuant to Subsection 5.5(a) hereof, shall be reduced by an amount equal to [* * *] adjusted in the manner as provided in paragraph 7 of the Coal Reserve Agreement. An example of the aforesaid calculation is attached hereto as Exhibit C and made a part hereof.

Examples of the aforesaid calculation are attached hereto as Exhibit E and made a part hereof.

If at any time during the term of this Agreement it is reasonably believed by either Party that the [* * *] or any index substituted therefor in accordance with the following provisions reflects the true change in

purchasing power of the United States dollar, then upon the written request of either Party a substituted index or method whereby such change in purchasing power of the United States dollar can be determined shall be substituted by mutual agreement. In the event that the [* * *] or any substituted index is changed in the future to use some

base other than the base of 1982 = 100, then, for the purposes hereof, the [* * *] or any substitute index, as the case may be, shall be adjusted so as to be in correct relationship to the base of 1982 = 100, or some other alternative base which is mutually agreeable to Coteau and Dakota. In the event publication of the [* * *] or any substituted index is no longer made by any federal agency, the index to be used as aforesaid shall be that index agreed to by the Parties which, after necessary adjustment, if any, provides the most reasonable substitute for said index.

at which point Dakota’s obligation to pay the Production Payment shall cease.

Dakota recognizes that mine closing costs will be incurred by Coteau from time to time. Dakota shall reimburse Coteau for all such mine closing costs. Such costs when determined shall be included within budgets and operating plans submitted to Dakota for its approval and shall be paid as part of the Cost of Production or otherwise be reimbursed to Coteau by Dakota as incurred, which obligation of Dakota shall survive any termination or expiration of this Agreement.

Coteau shall annually have an audit of its accounts performed by a firm of independent certified public accountants and shall provide Dakota with a copy of such audit. Dakota shall have the right at any time on reasonable notice in writing to Coteau to examine by its certified public accountants (which may include representatives of Basin Electric or its Affiliate) the records and books of account of Coteau and any Affiliate of Coteau, relating to the items and allocations of cost and production entering into the computation of the Cost of Production. Payment or payments under Article VII of this Agreement shall not be deemed a waiver of any rights of Dakota to have the price hereunder corrected.

On or before the twentieth (20th) day of each month, Coteau shall furnish to Dakota financial statements reflecting Coteau's financial position as of the end of the preceding calendar month and the results of operations of Coteau for the period then ending and a detailed statement of the Cost of Production for the preceding calendar month at Coteau's Mine, including the quantity of lignite delivered and the aggregate man-hours by classification and shifts required for its production. Coteau shall furnish to Dakota detailed cost analyses and other financial reports with respect to Coteau as Dakota may reasonably request. Said statements, analyses and reports shall be in such form and detail as may reasonably be requested by Dakota.

The monthly invoice for lignite sold and delivered hereunder in a calendar month shall be issued by Coteau no earlier than the sixth (6th) day of the next calendar month. Any such invoice received by Dakota after 12:00 Noon, Bismarck time, on any Business Day shall be deemed to have been received by Dakota on the following Business Day. Dakota shall pay such invoice within ten (10) days after its receipt thereof. If such tenth (10th) day is not a Business Day, Dakota shall pay such invoice no later than the next following Business Day.

After the end of each Development Period, the monthly billing of lignite sold and delivered from Coteau's Mine to which such Development Period related in each calendar month shall be based upon the estimated Cost of Production applicable to Coteau's Mine during such month, plus the Agreed Profit on lignite mined from Coteau's Mine for such month. Any differences between the estimated Cost of Production, upon which the billing is based, and actual Cost of Production for each calendar month shall be included as an adjustment to the monthly billing of lignite in each subsequent calendar month. Billings for lignite sold and delivered from Coteau's Mine for each calendar month shall be based upon the Agreed Profit for the previous calendar year as recomputed pursuant.to Section 5.5 hereof. As soon as possible after the expiration of each calendar year, the Agreed Profit shall be recomputed on an annual basis for such calendar year and additional payment or refund shall be made accordingly. An example of such recomputation is attached hereto as Exhibit H and made a part hereof.

If by reason of failure to receive shipping instructions or releases from Dakota under this Agreement, Coteau does not ship the required amount for any particular month, Coteau shall have the option, but shall not be required, to waive the actual delivery of the undelivered tonnage for such month, but any such waiver shall not relieve Dakota from liability to respond in damages for the failure to perform its obligations; provided, however, that Dakota shall not incur any liability to respond in damages if the failure to perform its obligations pursuant to this Agreement is due to an event described in Section 11.2 hereof. If Coteau fails to make deliveries required of it hereunder, Dakota shall have the option, but shall not be required, to waive the actual delivery of the undelivered tonnage, but such waiver shall not relieve Coteau from the liability to respond in damages for the failure to perform its obligations.

Notwithstanding anything to the contrary contained in this Agreement, Coteau shall not incur any liability to respond in damages for failure to perform its obligations pursuant to this Agreement if such failure is due to an event described in Section 11.1 hereof or if such failure is due to control exercised by Dakota in accordance with this Agreement or results from the failure of Dakota to perform its obligations in accordance herewith.

Except for the analyses of pit samples of Sub-Quality Lignite pursuant to Subsection 5.5(d) hereof, the quality of the lignite sold and delivered hereunder from Coteau's Mine shall be determined by analyses of samples taken from at least five thousand (5,000) Tons of lignite at a point or points mutually agreed upon by Coteau

and Dakota. Sampling and analysis shall be performed by methods which meet the standards of the American Society of Testing Materials, or by such other methods as may be mutually agreed upon by Coteau and Dakota. Each sample shall be divided into two (2) parts and put into suitable air-tight containers. One (1) part shall be submitted to Dakota for analysis and the second part shall be properly sealed and labeled and retained by Dakota for thirty (30) days, to be analyzed if a dispute arises with respect to the results of the analyses of Dakota. Coteau shall be given copies of all analyses made by Dakota and Coteau shall have the right to have a representative present at any and all times to observe the sampling and analyses performed by Dakota.

If any dispute arises with respect to the results of the analyses of Dakota, an analysis of the second part shall be made by an independent commercial testing laboratory mutually chosen by Coteau and Dakota and the analysis of the independent commercial testing laboratory shall be controlling. The cost of the analysis made by such commercial laboratory shall be paid by Coteau and shall be included in the Cost of Production. If any dispute arises with respect to the methods of sampling or analyses performed or being performed by Dakota, Coteau shall so advise Dakota. Coteau and Dakota shall meet promptly and shall, within thirty (30) days of notice of such dispute, mutually agree upon modifications or changes in such method(s) to resolve such dispute.

The weight of the lignite sold and delivered hereunder for use at Dakota's Plants shall be determined by Coteau on scales located on the conveyors between the Primary Truck Dump and the Secondary Crusher Building at Dakota's Primary Plants or at such other location(s) mutually agreed to by the Parties; provided, however, that when Coteau's scales are inoperable, the weight of lignite sold and delivered hereunder for use at Dakota's Primary Plants and Dakota's Other Plants shall be determined by Basin Electric's and/or DGC's scales at Dakota's Primary Plants. Dakota shall be given a record of all weight determinations made by Coteau and shall have the right to have a representative present at any and all times to observe the weighing of lignite sold and delivered hereunder. If Dakota at any time questions the accuracy of the weights, Dakota shall so advise Coteau and Coteau shall permit Dakota's representatives to test and check such scales. If such tests show that any scale is inaccurate, it shall be adjusted by mutual agreement of Coteau and Dakota to an accurate condition.

The weight of lignite redelivered by Dakota to Dakota's Secondary Plant and to Other Plants shall be determined from rail car or truck weight receipts acquired from the transportation contractor(s), or by some other method mutually agreeable to the Parties. The weight of the lignite utilized by Dakota's Primary Plants and Dakota's Other Plants shall be determined by subtracting the weight of the lignite ultimately delivered to Dakota's Secondary Plant and to Other Plants from the total lignite measured on Coteau's scales at the location(s) specified in this Section 9.2. For the weight of all lignite redelivered by Dakota to Dakota's Secondary Plant and Other Plants, Coteau shall be given a record of all weight determinations made by Dakota, and Coteau shall have the right to have a representative present at any or all times to observe the weighing of lignite delivered hereunder. If Coteau should at any time question the accuracy of the weights, Coteau shall so advise Dakota and Dakota shall permit Coteau's representatives to test and check such scales. If such tests show that any scale is inaccurate, it shall be adjusted by mutual agreement of Coteau and Dakota to an accurate condition.

If it is determined that any scale or any other method used to weigh lignite is inaccurate, the quantities of lignite delivered hereunder during the period when such inaccuracy existed shall be adjusted pursuant to procedures agreed to by the Parties.

It will be necessary for Coteau to obtain loans and/or leases for the construction and equipping of Coteau's Mine, which shall be indebtedness or lease obligations of Coteau not guaranteed by North American Coal.

If Dakota so requests, Coteau shall use its best efforts to obtain long-term loans and/or long-term leases (such loans and leases and such continued or additional loans or leases as may be necessitated by replacement of or addition to Coteau's · equipment, or by the expiration of any lease of equipment to Coteau prior to the expiration of this Agreement being referred to herein collectively as the "Loans and Leases'') in amounts sufficient for the following purposes: developing, equipping and operating of Coteau's Mine, including, without limitation, (a) developing roadways, (b) constructing tipples and cleaning plants, (c) acquiring machinery and (d) maintaining working capital for operating Coteau's Mine; provided, however, that (i) the Loans and Leases and the amounts thereof must be approved by Dakota in its sole discretion and shall be made if directed by Dakota and (ii) if such Loans and Leases are not available to Coteau, or Dakota does not request that Coteau obtain the same or does not approve the same, Dakota shall assume the responsibility for obtaining the Loans and Leases for such amounts and on such terms as it shall reasonably determine to be necessary to meet the foregoing purposes. If Dakota has such responsibility, Dakota itself shall (w) provide the Loans and Leases, (x) arrange for Loans or Leases by Coteau from third persons, (y) direct Coteau to borrow or lease from third persons or (z) combine Dakota's Loans or Leases with those of third persons. If the Loans and Leases shall be arranged with third persons, Dakota shall have the right subsequently to discharge the Loans or Leases and substitute itself as lender or lessor for the balance of the term of such Loans or Leases. Any Loan or Lease provided, arranged for or directed by Dakota in the exercise of its rights under this Section 10.1 shall not be less favorable to Coteau than a Loan or Lease for the same term which could be obtained by Coteau directly. Dakota shall have the right to cause part or all of its obligations under this Section 10.1 with respect to Coteau's Mine to be performed by an Affiliate, but such performance by an Affiliate shall not relieve Dakota of its responsibility for arranging subsequent Loans and Leases for Coteau's Mine.

Coteau shall not incur any long-term debt or pledge or encumber any assets owned by it in fee or any leasehold interests which it may hold except in connection with financing which has been approved by Dakota or an Affiliate of Dakota.

In the event of strikes, labor disputes, fires, accidents at Coteau's Mine, failure of equipment, inability of Coteau to obtain necessary equipment by reason of a general short supply thereof, failure of transportation or shortage of transportation equipment, federal, state or local laws or regulations or other contingencies, whether of a like or different nature, beyond the control of Coteau and not due to its negligence, any of which contingencies prevents or interferes with the production or shipment of lignite hereunder, the shipments contracted for may, at the election of Coteau, be suspended or partially suspended as the case may require for the duration of the contingency.

In the event of strikes, labor disputes, fires, accidents at Dakota's Plants, failure of equipment, the inability to obtain necessary equipment for Dakota's Plants by reason of a general short supply thereof, failure of transportation or shortage of transportation equipment, federal, state or local laws or regulations or other contingencies, whether of a like or different nature, beyond control of Dakota and not due to its negligence, any of which contingencies prevents or interferes with the taking of delivery of the lignite purchased hereunder at Dakota's Plants to which, under instructions of Dakota, such lignite is then currently being delivered, or which prevents or interferes with the processing of such lignite or the subsequent transportation of the product to be produced at Dakota’s Plants, or in the event that the product to be produced at Dakota’s Plants cannot be sold on an economic basis, then shipments contracted for shall, at the election of Dakota, be suspended or partially suspended as the case may require for the duration of such contingency.

Notwithstanding the suspensions of delivery of lignite provided for in Sections11.1 and 11.2 hereof, if Coteau's Mine is substantially idle during a calendar month pursuant to such Sections, or if Dakota takes no deliveries in any calendar month, Dakota shall pay to Coteau as part of the Cost of Production or otherwise reimburse Coteau for the actual out-of-pocket idle mine expenses and depreciation for such month.

Interruptions in tendering delivery or acceptance of shipments and deliveries referred to in this Article XI shall not invalidate the remainder of this Agreement, but upon removal of the cause of such interruptions, delivery shall be resumed at the rate specified herein. In the event of such interruptions, the Party immediately affected by such contingency shall, if possible, give reasonable advance notice confirmed in writing to the other Party of the extent and probable duration thereof, with sufficient detail to enable the other Party to verify the same.

Coteau shall proceed as directed by Dakota to acquire leases or the fee title to lignite reserves within the Dedicated Lignite. Coteau shall drill said areas to the extent that Dakota determines is necessary to establish the estimated quantity and the estimated quality of lignite therein and shall provide Dakota with access to all cores and access to and copies of all logs and other records of such drilling. In its acquisition and drilling program, Coteau shall follow any guidelines stated in writing by Dakota as to terms and conditions as well as the maximum amount it may pay for fee interests or in lease rentals or in tonnage royalties and amounts to be spent for drilling, and shall keep Dakota currently advised as to the progress of such acquisition and drilling programs. Upon the request of Dakota, Coteau shall provide, at the expense of Dakota, good and sufficient evidence of the right, title and interest of Coteau in and to leases and fee title to lignite reserves within the Dedicated Lignite. As to any parcel of land, whether mineral or surface or both, which by reason of its location is within the Dedicated Lignite, if Coteau notifies Dakota of the availability of such parcel for acquisition and Dakota does not request that it be acquired, North American Coal shall be free to acquire the same for its own account in accordance with the Coal Reserve Agreement and it shall not thereafter be considered a part or portion of the Dedicated Lignite.

At the time Additional Dedicated Lignite is acquired by Coteau or assigned, transferred or subleased by Dakota to Coteau, Dakota and Coteau shall mutually agree as to the total quantity of economically recoverable Tons of lignite contained in such lignite reserves. If Coteau and Dakota cannot agree on the quantity of economically recoverable Tons of lignite contained within such reserves, Coteau and Dakota shall jointly select a qualified independent consultant to make a final and binding determination of such quantity.

Coteau, utilizing lease maintenance and payment procedures approved by Dakota in writing, agrees to make all payments due under those leases acquired by or assigned or transferred to Coteau in the Dedicated Lignite in a timely manner, not to permit any default under said leases to occur, not to surrender said leases in whole or in part without the written consent of Dakota and not to encumber, assign or sublease said leases, except in connection with financing pursuant to Section 10.1 hereof.

If Coteau, without the written consent of Dakota, causes or permits any such lease covering lignite with a calorific content of six thousand two hundred (6,200) BTUs per pound or more, on an as-received basis, to be surrendered, terminated or cancelled prior to the expiration of its term or encumbers, assigns or subleases any such lease, (a) Coteau shall (i) at its sole expense, remove the encumbrance(s), (ii) reinstate such lease or (iii) acquire and make available a substitute lease or leases within the Dedicated Lignite which, to the reasonable satisfaction of Dakota, covers lignite of no less total BTU content than the lignite covered by any

such lease which was surrendered, terminated, cancelled, assigned or subleased, or (b) Coteau may, at its sole discretion, deliver to Dakota substitute lignite of no less total BTU content than the lignite covered by any such lease which was surrendered, terminated, cancelled, assigned or subleased at a per-Ton cost each month equal to the average of the Cost of Production, as defined in Section 5.2 hereof, for the twelve (12) month period preceding such month in which the substitute lignite is delivered to Dakota plus the applicable Agreed Profit. For the purposes of Subsections 12.4(a)(iii) and 12.4(b) hereof, only lignite with a calorific content of six thousand two hundred (6,200) or more BTUs per pound, on an as-received basis, shall be considered. For the activities described in Subsections 12.4(a)(ii) and 12.4(a)(iii) hereof, Coteau shall pay the acquisition costs (as hereinafter defined), drilling costs, engineering and testing costs, any increase in the annual advance engineering and testing costs and any increase in the annual advance royalty or rental payments and/or the production royalty rates. For the purposes of this Section 12.4 and Article XII hereof, the term 11 acquisition costs11 shall mean the salaries, associated overhead costs and related expenses of employees engaged in the reinstatement of any lease(s) or in the acquisition of a substitute lease(s), bonus or advance royalty for a lease(s), brokerage fees, legal and other expenses in establishing and reviewing titles, closing expenses and all drilling, exploratory, analytical and engineering costs directly related to such acquisition work. It is understood and agreed that in the event of a default by Coteau of its obligations under Section 12.3 hereof, Dakota's sole exclusive remedy shall be the enforcement of the obligations of Coteau set forth in this Section 12.4.

Coteau shall engage in no business other than the ownership and operation of

Coteau's Mine, the sale of the products thereof and the rental of property which is owned as an incident to its mining business. Coteau shall not sell outside of this Agreement any lignite extracted from the Dedicated Lignite which would make Coteau unable to give first priority to the performance of its obligations under this Agreement, including any extensions thereof. Coteau shall notify Dakota in writing annually of the amount of lignite to be extracted from the Dedicated Lignite, if any, which it proposes to sell outside this Agreement in advance of such sale, and Dakota shall be entitled to prohibit such sale if, in the reasonable judgment of Dakota, such sale would impair Coteau's ability to perform its obligations under this Agreement including any extensions thereof. In addition to the foregoing restrictions, such sales outside this Agreement shall not without written consent of Dakota exceed two million (2,000,000) Tons per calendar year during the first ten (10) calendar years of this Agreement.

Any sale of lignite by Coteau to third parties shall be from lignite reserves within the Dedicated Lignite. All Tons of lignite sold by Coteau to third parties shall be treated as if such Tons were sold and delivered to Dakota's Primary Plants for purposes of Section 5.7 hereof. In consideration of Dakota providing the financing that has enabled and will enable Coteau to acquire equipment which Coteau has used and will use to produce and sell lignite under this Agreement and to third parties, Coteau shall pay to Dakota for each Ton of lignite sold by Coteau during the term of this Agreement to third parties a fee equal to [* * *] per Ton, which fee shall be adjusted as provided in Subsection 5.5(a) hereof. In addition, Coteau shall include in the cost of lignite sold to third parties a cost per Ton not less than the then current Cost of Production per Ton. For all Tons of lignite sold to third parties, Coteau also shall reimburse Dakota or its Affiliate a proportionate amount of the costs that Dakota or such Affiliate has incurred, and for which Dakota has not been reimbursed by Coteau, of providing financing for Coteau's Mine or for which Dakota or its Affiliates anticipate Dakota or its Affiliates will incur during the period of time that said lignite is being sold to said third parties and would not otherwise be reimbursed by Coteau.

Notwithstanding the provisions of Section 13.1 hereof, it is contemplated that Coteau may provide other services to Dakota such as solid waste disposal, disposal of excess lignite fines, snow removal as well as such other services, in each instance as may be mutually agreed upon by Coteau and Dakota. It is further contemplated that Coteau shall provide said services to Dakota at a price agreed to by the Parties.

The original term of this Agreement shall commence on the date first written above and shall expire on April 22, 2007, provided that Dakota shall have the option to extend this Agreement for up to ten (10) successive five (5) year periods by giving written notification to Coteau not less than three (3) years before the expiration of the original term or, in the case of renewal terms, eighteen (18) months before the expiration of the renewal term then in effect; provided, however, that this Agreement shall terminate upon the exhaustion of the Dedicated Lignite. The lignite covered by any particular lease shall be deemed to be exhausted upon the expiration of such lease without further right of renewal.

be determined as though Coteau's Mine were closing on the effective date of the termination of this Agreement, regardless of Couteau’s intention regarding the future operation of Coteau’s Mine. If within six (6) months following the commencement of such negotiations the Parties are unable to agree on the amount of any such Premature Termination Mine Closing Costs, the Parties shall mutually select disinterested mining engineers, appraisers, actuaries or other qualified experts on the issues in controversy to determine the amounts of all such disputed mine closing costs. The determination of such experts shall be binding on the Parties.

[* * *]

In the event of the expiration of this Agreement other than as provided in Section 14.2 hereof, and provided that Dakota has not exercised its rights as provided in Section 14.4 hereof, Dakota shall pay all sums then due to Coteau hereunder and shall expressly assume in writing the primary obligation to pay all remaining indebtedness and lease obligations incurred by Coteau with respect thereto to acquire all machinery, equipment and improvements or other assets (other than lignite lands) held by Coteau in connection with Coteau’s Mine. Coteau shall execute and deliver to Dakota appropriate deeds, assignments, bills of sales and other instruments of transfer without further payment by Dakota. Any expense, including sales or transfer taxes, in connection with such transfer shall be paid by Dakota.

Notwithstanding the foregoing paragraph, Coteau shall have the right to retain title to all or any specified items of such property as shall be specified in writing by notice to Dakota upon payment to Dakota in cash of the fair market value of the property so retained or the amount of liens or lease rentals owing thereon, whichever is greater.

Dakota shall have no right to acquire Coteau’s lignite reserves or surface lands which were owned by it or North American Coal or an Affiliate of North American Coal prior to October 1, 1971.

Coteau shall be entitled to retain the lignite which has not been mined at the date of such termination and the acquisition cost of which has been reimbursed to Coteau by Dakota or its Affiliates upon payment to Dakota of an amount equal to the acquisition costs and carrying charges for such lignite plus an amount equal to interest on such costs and charges at the prime rate charged from time to time by Ameritrust Company National Association, Cleveland, Ohio, from the date of reimbursement to Coteau by Dakota or its Affiliates to the time of payment by Coteau to Dakota or its Affiliates. This right shall apply to all but not part of such lignite.

All lignite lands, the acquisition costs and carrying charges of which were paid by Dakota or its Affiliates which are not retained by Coteau as hereinabove provided in the foregoing paragraph, shall be transferred to Dakota by quitclaim deeds or assignment of leases without recourse, and Dakota shall pay only the expense, including transfer taxes, of such transfer.

Provided that Dakota has not exercised any of its rights under Section 14.2 hereof, upon the expiration of the original term of this Agreement or expiration of any renewal term of this Agreement, as the case may be, Dakota may exercise its right, pursuant to the Option Agreement, to cause the transfer of the Escrowed Stock to Dakota. To exercise said right, Dakota shall give written notice to Coteau with a copy to the escrow agent under the Option Agreement not less than three (3) years before the expiration of the original term or, in the case of renewal terms, eighteen (18) months before the expiration of the renewal term then in effect and shall otherwise comply with the terms and conditions of the Option Agreement.

Coteau agrees that no funds advanced by Dakota or any of its Affiliates directly or indirectly to Coteau for development of Coteau's Mine shall, without the approval of Dakota, be used to acquire (a) unmanufactured articles, materials or supplies as have been mined or produced outside the United States, or (b) manufactured articles, materials or supplies mined, produced or manufactured outside the United States or manufactured inside the United States substantially all from articles, materials or supplies mined, produced or manufactured, as the case may be, outside the United States.

Coteau shall not, without the approval of Dakota, use any funds advanced directly or indirectly by Dakota or any of its Affiliates for the development of Coteau's Mine to construct any facilities which will involve any district, site, building, structure or object which is included in the National Register of Historic Places, maintained by the Secretary of the Interior pursuant to the Historic Sites Act of 1935 and the National Historic Preservation Act.

accordance with procedures authorized in Executive Order 11246 of September 24, 1965, and such other sanctions may be imposed and. remedies invoked as provided in the said Executive Order or by rule, regulation or order of the Secretary of Labor, or as otherwise provided by law.

Waiver by either Party of any breach by the other Party of any of the terms and provisions of this Agreement shall not be deemed to be a waiver of breach on any other occasion of the same, nor a waiver of breach of any other term or condition. No course of dealing by either of the Parties shall operate as a waiver of any rights in respect to this Agreement. No delay or omission on the part of either Party in exercising any right in respect to this Agreement shall operate as a waiver of such right or any other right hereunder.

A dispute between the Parties arising out of Section 4.3 hereof shall be tried by arbitration pursuant to the Rules of the American Arbitration Association in effect at the time of such arbitration, with the exceptions, as hereinafter provided for. The request for arbitration shall be in writing, setting forth in detail the claim or claims to be arbitrated, the amount involved, if any, and the remedy sought. It shall be delivered to the other Party within ninety (90) days of the date of the first knowledge of the claiming Party of the occurrence or conditions giving rise to the dispute. Any failure to request arbitration within such ninety (90) day period shall be deemed a waiver of the right to arbitrate the dispute. Within fifteen (15) days after the delivery of the request, the Parties shall agree upon an arbitrator. If the Parties are unable to agree upon the arbitrator within such fifteen (15) days, the arbitrator, who shall be an expert in the field of knowledge wherein the controversy lies, shall be selected by the Senior Judge of the United States Court of Appeals for the Eighth Circuit. The decision of the arbitrator shall be limited to selecting either the position and remedy stated by the Party in its request or the position and remedy stated by the other Party in its response to such request. The arbitrator shall have no power to mediate or compromise any dispute, but shall have only the limited authority herein provided to review the information presented by the Parties and to select the position and remedy proposed by one of the Parties. The award of the arbitrator shall be binding upon the Parties.

It is mutually understood that the existence of a dispute which has or may become the subject of an arbitration shall in no way excuse either Coteau or Dakota from performing its obligations under Section 4.3 hereof, and each of the Parties hereto shall continue to perform in accordance with the terms of this Agreement irrespective of the existence of any such dispute.

This Agreement shall not be assigned by either Party without the written consent of the other Party except that either Coteau or Dakota may assign its interest in this Agreement either in connection with the merger, consolidation or sale of substantially all the assets of the assigning Party or under their respective mortgages or indentures to finance any of Coteau's Mine or Dakota's Plants. Any such permitted assignment shall not relieve the assignor of its obligation hereunder.

Coteau shall conduct its mining operations hereunder in a careful, good and workmanlike manner according to the best mining practices prevalent in the field. Coteau shall also use its best efforts to operate Coteau's Mine in accordance with the laws, rules and regulations of all applicable federal, state and local governments, or their instrumentalities, if any, relating to mining operations and using of mining premises; provided, however, that Coteau shall have the right to contest in good faith through appropriate legal proceedings the validity or applicability of any such law, rule or regulation so long as Coteau gives Dakota prompt written notice of such proceedings and so long as the exercise of such right does not result in excessive additional costs or does not result in the closure of Coteau's Mine or a substantial portion thereof.

Dakota or its Affiliates, as Dakota's designees, shall upon reasonable notice have the right and privilege at any time of entering Coteau's Mine in order to inspect or survey the same and Dakota may designate a permanent representative for such purpose; provided, however, that the exercise of such rights shall not interfere with the operation of Coteau's Mine. Coteau shall implement the written recommendations made by Dakota pursuant to written notice in accordance with Section 16.13 hereof with respect to Coteau's mining operations; provided, however, that such suggestions or recommendations are consistent with sound engineering and design practices and in accordance with applicable laws, rules and regulations, unless Coteau shall have responded in writing to Dakota setting forth the reasons for not implementing such recommendations and such reasons must be based on prudent management practices.

Coteau shall obtain and maintain insurance, to the extent available, with such coverage and of such types, limits and amounts as may be from time to time required and approved by Dakota, including but not limited to public liability, fire insurance with extended coverage and additional extended coverage, insurance covering physical damage to equipment and mine restoration.

Coteau and Dakota acknowledge and agree that this Agreement is intended to directly benefit the Affiliates of Dakota, including Basin Electric and DGC, and the Affiliates of Coteau, including North American Coal, which are third party beneficiaries to this Agreement.

The table of contents, titles and headings of the Articles and Sections of this Agreement have been inserted for the convenience of reference only, are not to be considered part hereof and shall in no way modify or restrict the meaning of the terms or provisions hereof. As used herein, any gender shall include any other gender, the singular shall include the plural and the plural shall include the singular, wherever appropriate.

This Agreement and the rights and obligations of the Parties to this Agreement shall be governed and construed in accordance with the laws of the State of North Dakota.

This Agreement may not be amended, except in each instance pursuant to a written document executed by the Parties.

This Agreement may be executed simultaneously in any number of counterparts, each of which shall be deemed an original, and it shall not be necessary in making proof of this Agreement to produce or account for more than one such counterpart.

Coteau and Dakota each shall appoint a designee to receive and give on behalf of Coteau and Dakota all notices and other communications required or permitted under this Agreement.

Except as otherwise expressly stated in this Agreement, any such notice or other communication shall be in writing to the other Party and shall be deemed to have been duly given when delivered in person or posted by United States registered or certified mail, with postage prepaid, addressed to the designated representatives of Coteau and Dakota as follows:

a) To Coteau:

The Coteau Properties Company

P.O. Box 1089

Beulah, ND 58523

Attention: President

with copies to:

The Coteau Properties Company

2000 Schafer Street

Box No. 5500

Bismarck, ND ###-###-####

Attention: Chairman

and

The North American Coal Corporation

13140 Coit Road

Suite 400

Dallas, TX ###-###-####

Attention: President and

Chief Executive Officer

Dakota Coal Company

1600 East Interstate Avenue Bismarck, NO ###-###-#### Attention: Vice President and Chief Operating Officer

c) To such other address or addresses as the Parties may from time to time

designate in writing.

Coteau and Dakota, as assignee of ANG’s rights, interests and obligations under the Coal Sales Agreement, hereby agree that, effective as of the date hereof, the Coal Sales Agreement is hereby terminated and shall be of no further force and effect; provided, however, that Section 5.6 and Section 5.7 of the Coal Sales Agreement are not terminated hereby but shall survive such termination hereunder and shall remain in full force and effect until such time as the Coal Reserve Agreement is of no further force and effect; and provided further, however, that any and all liabilities and obligations of Coteau, ANG and Dakota under the Coal Sales Agreement which have accrued prior to such termination are not terminated hereby but shall survive such termination.

The effectiveness of this Agreement is subject to the approval of the Administrator of the Rural Electrification Administration, United States Department of Agriculture, or his designee.

IN WITNESS WHEREOF, the Parties have caused this Agreement to be executed on their behalf by their respective authorized representatives as of the day first written above.

THE COTEAU PROPERTIES COMPANY

By:

Chairman

ATTEST:

Secretary

DAKOTA COAL COMPANYY

By:

President and Chief

Executive Officer

ATTEST:

Secretary