CHEYENNE, Wyo. — An earthen dam in south-central Wyoming is in danger of failing and potentially washing out a highway, though authorities have downgraded the failure risk from "imminent" to "possible."
Authorities say an outlet pipe halfway down the 55-foot-high Little Robber Dam has become separated. Carbon County Emergency Management Coordinator John Zeiger said Tuesday that water was eroding the dam.
Wyoming Highway 789 is about a mile downstream.
The dam is on federal land 15 miles north of the Colorado line. It holds back a 28-acre reservoir with 200 million gallons of water — enough water to fill more than 400 large swimming pools.
No homes are downstream — just some oil and gas wells. Highway 789 remains open and Zeiger says a contractor was headed to the dam to make repairs.