CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS As independent public accountants, we hereby consent to the incorporation by reference in this Form 10-K of our report dated January 24, 1996 included in the MDU Resources Group, Inc. Annual Report to Stockholders for 1995. We also consent to the incorporation of our report incorporated by reference in this Form 10-K into the Company's previously filed Registration Statements on Form S-3, No. 33-46605 and No. 33-66682, and on Form S-8, No. 33-54486, No. 33-53896 and No. 33-53898. /s/ ARTHUR ANDERSEN LLP ARTHUR ANDERSEN LLP Minneapolis, Minnesota February 28, 1996 CONSENT OF ENGINEER We hereby consent to the reference to our estimates dated January 9 and 23, 1996, appearing in this Annual Report on Form 10-K. We also consent to the incorporation by reference in the Registration Statements on Form S-3, No. 33-46605 and No. 33-66682, and on Form S-8, No. 33-54486, No. 33-53896 and No. 33-53898 of MDU Resources Group, Inc. and in the related Prospectuses of the reference to such reports appearing in this Annual Report on Form 10-K. /s/ RALPH E. DAVIS ASSOCIATES, INC. RALPH E. DAVIS ASSOCIATES, INC. Houston, Texas February 28, 1996 CONSENT OF ENGINEER We hereby consent to the reference to our report dated May 9, 1994, appearing in this Annual Report on Form 10-K. We also consent to the incorporation by reference in the Registration Statements on Form S-3, No. 33-46605 and No. 33-66682, and on Form S-8, No. 33-54486, No. 33-53896 and No. 33-53898 of MDU Resources Group, Inc. and in the related Prospectuses of the reference to such report appearing in this Annual Report on Form 10-K. /s/ WEIR INTERNATIONAL MINING CONSULTANTS WEIR INTERNATIONAL MINING CONSULTANTS Des Plaines, Illinois February 28, 1996