Flying home for Thanksgiving? See how fuel-efficient your airline is.

A new list ranks airlines for fuel efficiency.

The International Council on Clean Transportation found a 51 percent difference between the most-efficient and least-efficient airlines. Learn where your preferred airline lands this week on

Learn about the SourceGas acquisition

On July 12, Black Hills Corp. 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.

We know you're busy,eBill makes paying your bill easy.

Pictured: Joanie and Kate

That’s why we created eBill, a fast, easy way for you to receive your bill electronically and pay it online – all for free. Now you can finally catch up on that TV show everyone’s talking about.

How energy efficient is your home? Try one of our energy audits to find out.

To get started, check out our Home Energy Suite.

View useful details about your estimated usage, seasonal factors, and cost-saving recommendations. The Home Energy Calculator is free and will take less than 10 minutes to complete.