 RAPID CITY, S.D., Oct. 06, 2021 GLOBE NEWSWIRE -- Black Hills Corp. NYSE: BKH will announce its 2021 third quarter earnings after the market closes Tuesday, Nov. 2, 2021, and will host a live conference call and webcast at 11 a.m. EDT on Wednesday, Nov. 3, 2021, to discuss the companys financial results. 