Black Hills Corp. Natural Gas Utilities Request Rate Reviews in Colorado and Iowa Black Hills Service Company, LLC Rapid City, South Dakota, UNITED STATES RAPID CITY, S.D., June 01, 2021 (GLOBE NEWSWIRE) -- Black Hills Corp. (NYSE: BKH) today announced that its natural gas utility subsidiaries in Colorado and Iowa separately filed rate review applications to recover investments made in natural gas infrastructure systems in their respective states. These critical investments were required to meet system growth, ensure the safe and reliable delivery of natural gas to customers’ homes and businesses, and meet compliance requirements of state and federal regulations. The importance of these investments was recently demonstrated by the excellent performance of Black Hills’ pipeline systems to serve extraordinary demand during the extreme cold conditions of the polar vortex and Winter Storm Uri in February. These investments in replacing and upgrading pipeline materials have also contributed to more than a one-third reduction in greenhouse gas emissions intensity for the company’s pipeline systems since 2005.