(UPDATE) Highway 220 reopens after HAZMAT incident closure By Greg Hirst on July 23, 2021 WYDOT UPDATE: At 8:56 pm, WYDOT announced the WYO 220 was fully re-opened. CASPER, Wyo. — Wyoming Highway 220 is closed from Muddy Gap to Alcova in both directions as of 3:24 p.m. Friday, said the Wyoming Department of Transportation. The closure is “due to hazardous material,” WYDOT said. Article continues below... Share this: