BHC FORM 10K DECEMBER 31, 2009

Company

BLACK HILLS CORP /SD/

Filed

February 26, 2010

Period of Report

December 31, 2009

Accession Number

0001130464-10-000041

A 10-K is a company's comprehensive annual report, required by the SEC. It includes audited financial statements, a description of the business, risk factors, and management's discussion of results. Learn more about 10-K filings →