Ada County Highway District

News and Press Releases Friday, April 21, 2017

Traffic Resumes on Warm Springs Avenue After Rock Removal

Spring weather and work to dislodge the remaining, precarious rocks allowed the road to be reopened to traffic on Friday.

Workers finished the $25,000 remediation, clearing fallen rocks, removing teetering boulders and reinstalling concrete guardrails along the slope.

"We didn't want to reopen the road until we were out of the freeze-thaw cycle," said John Kirk, ACHD's deputy director of engineering. "We believe the Mesa will remain stable enough to allow regular traffic to resume."

In coming weeks, the ACHD Commission will hear options for longer-term treatment of the eroding slope, which frequently sheds rocks in the winter, particularly during years of heavy snow and prolonged cold.

Warm Springs was closed on January 10, 2017 when several boulders fell onto the street, forcing a closure from Starcrest Drive to East Parsnip Peak Drive. Starview Drive also was closed from Warm Springs to South Mill Point Lane because of falling rocks.

Starview reopened in early February, after rocks were cleared and 100 feet of new guardrail was added.

In January of 2015, Warm Springs Avenue was closed for two weeks after a 50-ton boulder fell onto Warm Springs Avenue. After a contractor removed a number of rocks, ACHD crews placed more than 1,200 feet of concrete guardrail along two areas at the foot of the Mesa to block stones from getting to the road.

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