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                                                                    EXHIBIT 23.1


                    CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

As independent public accountants, we hereby consent to the incorporation of our
report incorporated by reference in this Form 11-K into the Company's previously
filed Registration Statements File Nos. 33-57503, 33-60157, 333-05463,
333-21007, 333-77765 and 333-94451.


                                                         /s/Arthur Andersen LLP
                                                             ARTHUR ANDERSEN LLP


Minneapolis, Minnesota,
       June 21, 2000






























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