CHEYENNE, Wyo. (AP) — Work has begun on a detour around the temporary bridge spanning a section of Wyoming 130 where four members of a family died when the bridge washed out last summer in Carbon County.

The bridge is located about 22 miles southeast of Saratoga.

Work on the detour downstream from the temporary bridge is not expected to affect movement of alternating one-way traffic over the temporary bridge.

Once the detour is completed, traffic will be diverted onto it so the bridge can be dismantled and a new concrete culvert installed.

Flash flooding last July eroded a trench about 25 feet wide and nine feet deep across the highway, resulting in the deaths of four members of a Colorado family whose vehicle drove into the breach and was washed away.