MDU RESOURCES GROUP, INC. Amended and Restated DEFERRED COMPENSATION PLAN FOR DIRECTORS Effective January 1, 1992 I. PURPOSE The Board of Directors of MDU Resources Group, Inc. (the "Company") established the Deferred Compensation Plan for Directors (the "Plan") effective as of September l, 1988. The Plan is hereby amended and restated effective January 1, 1992, and is substituted for the Restated Plan established by the Company on August 1, 1991. The Plan shall continue until terminated by the Board of Directors of the Company, subject to the provisions of Article XII, below. The purpose of this Plan is to aid the Company in attracting and retaining as Directors persons whose abilities, experience and judgment can contribute to the continued progress of the Company. The Plan will provide a method of deferring compensation to the Directors. II. DEFINITIONS A. Beneficiary. "Beneficiary" means the person or persons designated as such in accordance with Article XI. B. Compensation and Deferral Amount. "Compensation" means any cash retainer, meeting fees and any other cash compensation payable to Eligible Directors by the Company for services as a Director. This Deferred Compensation Plan for Directors governs any or all of that Compensation which the Participant elects to credit to his Deferred Compensation Account, which is hereafter referred to as the "Deferral Amount." C. Deferred Compensation Account. "Deferred Compensation Account" means the account maintained on the books of account of the Company for each Participant pursuant to Article VI. D. Effective Date. "Effective Date" means January 1, 1992, the date on which the restated and amended Plan became effective. E. Eligible Director. "Eligible Director" means those Directors of the Company who are not employees of the Company. F. Investment Units. This term shall have the meaning defined in Article VI.B. G. Market Price. "Market Price" means the average of the highest and lowest transaction prices for the Company's common stock on the New York Stock Exchange for a given day. H. Participant. "Participant" means an Eligible Director participating in the Plan in accordance with the provisions of Article IV. I. Plan Year. "Plan Year" means the calendar year. III. ADMINISTRATION OF THE PLAN The Board of Directors shall be the sole administrator of the Plan. The Board of Directors may from time to time establish rules and regulations for the administration of the Plan. All determinations of the Board of Directors, irrespective of their character or nature, including, but not limited to, all questions of construction and interpretation, shall be final, binding and conclusive upon all parties. Without limiting the generality of the foregoing, the determination of the Board of Directors as to whether a Participant has terminated his services and the date thereof shall be final, binding and conclusive upon all persons. The Company and/or the Board of Directors may consult with legal counsel, who may be counsel for the Company or other counsel, with respect to its obligations and duties hereunder or with respect to any claim, action or proceeding or any other matter, and shall not be liable for any action taken or not taken by it in good faith pursuant to the advice of such counsel. The Chairman, at the direction of the Board of Directors shall be responsible for maintaining books and records for the Plan and adopting standard forms for such matters as beneficiary designations and applications for benefits, provided such rules and forms are not inconsistent with the provisions of the Plan. Such books and records shall only be open for examination by a Participant or his duly designated beneficiary to the extent that they specifically involve the Deferred Compensation Account created for his benefit or any payments which are to be made to him or his beneficiary hereunder. Each Participant or his duly designated beneficiary shall be notified no less frequently than annually of the balance in his account. Neither the Board of Directors nor any member of the Board of Directors nor the Company nor any other person who is acting on behalf of the Board of Directors or the Company shall be liable for any act or failure to act hereunder except for gross negligence or fraud. IV. PARTICIPATION All Eligible Directors, including any person who becomes a Director after the effective date hereof, shall be Participants in the Plan. Each Participant in the Plan shall have the right to elect to defer the payment of all or any part of his Compensation, with such Deferral Amount to be payable at the time or times and in the manner hereinafter stated. A Participant must defer at least $1,000 per year. Each Participant who elects to defer the payment of all or any part of his Compensation shall execute and deliver to the Board of Directors a "Notice of Election." Such Notice will provide the percentage of his Compensation to be deferred, the date such deferral is to commence and the beneficiary designations of the Director. Such deferral election shall be applicable only to Compensation earned by reason of services rendered after the date of such Notice. An election to defer Compensation shall continue in effect until revoked or modified by a subsequent "Notice of Election," provided however, (1) that every election to defer shall be irrevocable as to Compensation earned prior to the date of revocation and (2) that such election may be changed no more often than annually. Revocation or modification shall be made in writing to the Board of Directors and shall be effective upon the date stated therein. V. VESTING OF DEFERRED COMPENSATION ACCOUNT A Participant's interest in his Deferred Compensation Account shall vest immediately with regard to Deferral Amounts and earnings thereon. VI. ACCOUNTS AND VALUATIONS A. Deferred Compensation Accounts. The Board of Directors shall establish and maintain a separate Deferred Compensation Account for each Participant. The Participant's Deferral Amount shall be credited to the Participant's Deferred Compensation Account quarterly on the first day of March, June, September and December in amounts as nearly equal as possible. B. Conversion to Investment Units. At the time a Deferral Amount is credited to the Deferred Compensation Account, it shall be converted to Investment Units, by dividing the amount deferred by the Market Price of the Company's stock on the first trading day immediately preceding the deferral. Fractional share Investment Units will be maintained in the Account. VII. DIVIDEND EQUIVALENTS If a dividend is declared on the common stock of the Company, an equivalent amount shall be credited to the Participant's Deferred Compensation Account for each Investment Unit. Such amounts shall be converted to additional Investment Units, pursuant to Article VI.B. VIII. DISTRIBUTION A. Conversion of Investment Units to Dollars. When a Participant leaves the Board of Directors, dies, or becomes disabled, the number of Investment Units in his Deferred Compensation Account shall be multiplied by the Market Price of the Company's common stock on the day that is six full calendar months after the date of his leaving, death, or disability. If the New York Stock Exchange is not open that day then it shall be the Market Price on the next day the New York Stock Exchange is open. During this six month period, if a dividend is declared on common stock of the Company, an equivalent amount shall be credited to the Participant's Deferred Compensation Account for each Investment Unit. Such amounts shall be credited in cash and shall not be converted to additional Investment Units. B. Payment. The dollar value of the Investment Units contained in the Participant's Deferred Compensation Account shall be paid to him in substantially equal monthly payments over five years, with interest at a fixed rate over the five-year period. The fixed rate shall be the prime rate plus 1 percentage point on the day the value of the Investment Units is determined according to this Article VIII. The "prime rate," for purposes of this paragraph, shall be the base rate on corporate loans posted by at least 75 percent of the nation's 30 largest banks as reported daily in The Wall Street Journal. IX. TAX WITHHOLDING UPON DISTRIBUTION To the extent required by law, the Company shall withhold from payments made hereunder any taxes required to be withheld by the federal or any state or local government. X. COMMENCEMENT OF PAYMENTS Except as otherwise provided in this Plan, commencement of payments under this Plan shall begin as soon as administratively feasible after the value of the Investment Units is determined according to Article VIII. XI. BENEFICIARY DESIGNATION Each Participant shall have the right at any time to designate any person or persons as Beneficiary or Beneficiaries (both principal and contingent) to whom payment under this Plan shall be paid in the event of death prior to complete distribution of the deferred amounts under the Plan. Each beneficiary designation shall become effective only when filed in writing with the Board of Directors during the Participant's lifetime on a form provided by the Board of Directors. The filing of a new beneficiary designation form will cancel all beneficiary designations previously filed. Any finalized divorce of a Participant subsequent to the date of filing of a beneficiary designation form shall revoke such designation. The spouse of a married Participant domiciled in a community property jurisdiction shall join in any designation of Beneficiary or Beneficiaries other than the spouse. If a Participant fails to designate a Beneficiary as provided above or if the beneficiary designation is revoked by divorce, or otherwise, without execution of a new designation, or if all designated Beneficiaries predecease the Participant or die prior to complete distribution of the Participant's benefits, then the distribution of such benefits shall be made to the Participant's estate. If any distribution to a Beneficiary is to be made in installments, and the primary Beneficiary dies before receiving all installments, the remaining installments, if any, shall be paid to the estate of the primary Beneficiary in a lump sum. XII. AMENDMENT AND TERMINATION OF PLAN A. Amendment. The Company may at any time amend the Plan in whole or in part, provided, however, that except as provided in Article XII.B., no amendment shall act to reduce the benefits under the Plan payable to any Participant with respect to any Deferral Amount credited to the Participant's Deferred Compensation Account prior to the date of the amendment. Written notice of any amendments shall be given to each Participant. B. Termination of Plan 1. Company's Right to Terminate. The Board of Directors may at any time terminate the Plan. 2. Payments Upon Termination. Upon any termination of the Plan under this section no additional Deferral Amounts will be credited to the Participant's Deferred Compensation Account. The Investment Units recorded in such Account shall be converted into dollars pursuant to Article VIII.A. and paid in a lump sum to the Participant or the Participant's Beneficiary. XIII. MISCELLANEOUS A. Unsecured General Creditor. Participants and their beneficiaries, heirs, successors, and assigns shall have no legal or equitable rights, interests, or other claims in any property or assets of the Company, nor shall they be beneficiaries of, or have any rights, claims, or interests in any specified assets of the Company. Any and all of the Company's assets shall be and remain general, unpledged, unrestricted assets of the Company. The Company's obligation under the Plan shall be that of an unfunded and unsecured promise of Company to pay money in the future. B. Obligations to the Company. If a Participant becomes entitled to a distribution of benefits under the Plan, and if at such time the Participant has outstanding any debt, obligation, or other liability representing an amount owed to the Company, then the Company may offset such amounts owing it or an affiliate against the amount of benefits otherwise distributable. Such determination shall be made by the Board of Directors. Establishment of this Plan and the participation by any person shall not be construed to confer any right on the part of such person to be nominated for reelection, or to be reelected, to the Board of Directors of the Company. C. Nonassignability. Neither a Participant nor any other person shall have any right to commute, sell, assign, transfer, pledge, anticipate, mortgage, or otherwise encumber, transfer, hypothecate, or convey in advance of actual receipt the amounts, if any, payable hereunder, or any part thereof, which are, and all rights to which are, expressly declared to be unassignable and nontransfer- able. No part of the amounts payable shall, prior to actual payment, be subject to seizure or sequestration for the payment of any debts, judgments, alimony or separate maintenance owed by a Participant or any other person, nor be transferable by operation of law in the event of a Participant's or any other person's bankruptcy or insolvency. D. Protective Provisions. A Participant will cooperate with the Company by furnishing any and all information requested by the Company in order to facilitate the payment of any amounts hereunder. If a Participant refuses to cooperate, the Company shall have no further obligation to the Participant under the Plan. E. Gender, Singular and Plural. Wherever the context so requires, words in the masculine include the feminine and words in the feminine include the masculine and the definition of any term in the singular may include the plural. F. Captions. The captions to the articles, sections, and paragraphs of this Plan are for convenience only and shall not control or affect the meaning or construction of any of its provisions. G. Applicable Law. This Plan shall be construed, administered and governed in accordance with the laws of the State of North Dakota. H. Validity. In the event any provision of this Plan is held invalid, void, or unenforceable, the same shall not affect, in any respect whatsoever, the validity of any other provision of this Plan. I. Notice. Any notice or filing required or permitted to be given to the Board of Directors shall be sufficient if in writing and hand delivered, or sent by registered or certified mail, to the principal office of the Company, directed to the attention of the Secretary of the Company. Such notice shall be deemed given as of the date of delivery or, if delivery is made by mail, as of the date shown on the postmark on the receipt for registration or certification.