Attached files
file | filename |
---|---|
EX-32.1 - EXHIBIT 32.1 - BLACK HILLS POWER INC | bhpex-321q12020.htm |
EX-32.2 - EXHIBIT 32.2 - BLACK HILLS POWER INC | bhpex-322q12020.htm |
EX-31.2 - EXHIBIT 31.2 - BLACK HILLS POWER INC | bhpex-312q12020.htm |
EX-31.1 - EXHIBIT 31.1 - BLACK HILLS POWER INC | bhpex-311q12020.htm |
EX-18.1 - EXHIBIT 18.1 - BLACK HILLS POWER INC | bhpex-181.htm |
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