Holly Frontier Refinery

Frontier Refining has agreed to pay $153,000 in penalties to resolve alleged violations of the Clean Air Act and the Emergency Planning and Community Right-to-Know Act at its Cheyenne refinery.

Have you seen the smoke rising from Cheyenne's refinery? We've received a lot of calls about the black and yellow-green smoke coming out of the Holly Frontier Refinery in Cheyenne on Tuesday, September 3, afternoon. Amy Richards called Kevin Burke, the refinery spokesman, and he said they had a power outage and had to shut down.