Exhibit 99.2


                             BLACK HILLS POWER, INC.

                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In  connection  with the  Quarterly  Report  of Black  Hills  Power,  Inc.  (the
"Company") on Form 10-Q for the period  ending  September 30, 2002 as filed with
the Securities  and Exchange  Commission on the date hereof (the  "Report"),  I,
Mark T. Thies, Senior Vice President and Chief Financial Officer of the Company,
certify,  pursuant to 18 U.S.C.  ss. 1350, as adopted pursuant to ss. 906 of the
Sarbanes-Oxley Act of 2002, that:

(1)  The Report fully complies with the requirements of Section 13 (a) or 15 (d)
     of the Securities Exchange Act of 1934; and

(2)  The information  contained in the Report fairly  presents,  in all material
     respects, the financial condition and results of operations of the Company.


/s/ Mark T. Thies
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Mark T. Thies
Senior Vice President and
Chief Financial Officer
November 14, 2002