0001130464-02-000021 10-Q 2 20020331 20020515 BLACK HILLS CORP /SD/ 0001130464 4911 460458824 SD 1231 10-Q 34 001-31303 02653316 625 9TH STREET PO BOX 1400 RAPID CITY SD 57709 6057212343 625 9TH STREET PO BOX 1400 RAPID SD 57709 BLACK HILLS HOLDING CORP 20001222 10-Q 1 form10q-1st_02.txt 1ST-QTR_02 EX-99 3 ex99-10q_1st02.txt LETTER TO COMMISSION PURSUANT TO TEMP NOTE 3T