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Learn about the SourceGas acquisition

On July 12, we announced the acquisition of SourceGas.

With the addition of approximately 425,000 SourceGas customers, the combined entity will serve more than 1.2 million electric and gas utility customers in 790 communities.

Learn more about our new corporate headquarters.

A view of the Black Hills from the facility site.

We’re committed to continuing to grow our company as we’ve done over the past 10 years and helping to grow the Rapid City community as we’ve done for more than 130 years. 

Obama announced final Clean Power Plan rules

The regulations are more aggressive than previous versions.

These rules are being called the strongest action ever taken in the United States to combat climate change.

Looking for a career in energy?Join our mission.

Improving people’s lives is important work, not to be taken lightly. Think you've got what it takes? We're always looking for people to join our mission.

We've increased our dividend45 years in a row.

Life Sponsored by Energy

We have quite a track record of looking out for our investors. By continually managing our business, we balance our customers’ concerns about their energy prices along with our investors’ expectation of annual dividends. Read more.

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