Exhibit 21
BLACK HILLS CORPORATION
SUBSIDIARY OF REGISTRANT
Wyodak Resources Development Corp.
a Delaware corporation
Black Hills Energy Capital, Inc.
a Delaware corporation
SUBSIDIARIES OF WYODAK RESOURCES DEVELOPMENT CORP.
DAKSOFT, Inc.
a South Dakota corporation
Landrica Development Company
a South Dakota corporation
Black Hills Exploration and Production, Inc.
a Wyoming corporation
Black Hills Generation, Inc.
a Wyoming corporation
Black Hills Capital Group, Inc.
a South Dakota corporation
SUBSIDIARY OF BLACK HILLS ENERGY CAPITAL, INC.
Black Hills Independent Power Fund, Inc.
a Texas corporation
SUBSIDIARIES OF BLACK HILLS CAPITAL GROUP, INC.
Black Hills Fiber Systems, Inc.
a South Dakota corporation
Black Hills Coal Network, Inc.
a South Dakota corporation
Enserco Energy, Inc.
a South Dakota corporation
Black Hills Energy Resources, Inc.
a South Dakota corporation
SUBSIDIARY OF BLACK HILLS FIBER SYSTEMS, INC.
Black Hills FiberCom, LLC
a South Dakota corporation
SUBSIDIARY OF ENSERCO ENERGY, INC.
VariFuel, LLC
a South Dakota corporation
SUBSIDIARY OF BLACK HILLS ENERGY RESOURCES, INC.
Black Hills Energy Pipeline, LLC
a Delaware corporation
Black Hills Millenium Pipeline, Inc.
a South Dakota corporation
Black Hills Energy Terminal, LLC
a South Dakota corporation
Black Hills Millenium Terminal, Inc.
a South Dakota corporation
