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The Casper Star-Tribune via AP, Alan Rogers
Mud and debris cover a side street Friday, June 5, 2015 in Lusk. Parts of Lusk, Wyo, Manville and other areas of Niobrara County were flooded early Thursday when intense rains caused the Niobrara River to overflow its banks. The Red Cross said 11 homes were destroyed by the flash flood, which also collapsed a U.S. 85 overpass and washed out other sections of highway.

CHEYENNE, Wyo. — Road crews are working feverishly to reopen highways damaged by flooding in eastern Wyoming this week.

Flash flooding washed out a bridge on U.S. 85 at Lusk and damaged sections of U.S. 18-20 and state Highway 270 early Thursday. No traffic was allowed in and out of Lusk on Thursday and Friday except for local residents and emergency responders.

However, on Saturday, Wyoming Department of Transportation crews reopened U.S. 20 from Lusk to the Nebraska state line.

WYDOT spokesman Bruce Burrows says crews are making progress slowly but surely.

Elsewhere in Wyoming, residents in Sheridan and Johnson counties also were cleaning up from flooding this week.

The National Weather Service says the active thunderstorm pattern that the state has seen recently was expected to dissipate beginning Sunday.