 RAPID CITY, S.D., Jan. 12, 2021 GLOBE NEWSWIRE -- Black Hills Corp. NYSE: BKH will announce its 2020 fourth quarter and full year earnings after the market closes Tuesday, Feb. 9, 2021, and will host a live conference call and webcast at 11 a.m. EST on Wednesday, Feb. 10, 2021, to discuss the companys financial results. 