Remote Highway in Northern California Collapses, Forcing 200-Mile Detour: Caltrans

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State Route 3 in Trinity County collapsed, as shown in this Caltrans District 2 photo posted March 15, 2016.

State Route 3 in Trinity County collapsed, as shown in this Caltrans District 2 photo posted March 15, 2016.

A remote mountain highway in Northern California completely collapsed this week, leaving a gaping hole where the pavement should be and temporarily requiring a 200-mile detour.

State Route 3 in Trinity County, about 30 miles northwest of Redding, was shut down late Monday after its “complete failure” while Caltrans worked to repair damage, according to a Facebook post from the agency’s District 2.

State Route 3 is shown on March 16, 2016. (Credit: Caltrans District 2)

State Route 3 is shown on March 16, 2016. (Credit: Caltrans District 2)

The Trinity County Board of Supervisors declared a state of emergency Tuesday because the area’s only north-south route was severed, Caltrans said Tuesday evening.

The only initially available detour around the closure was 200 miles long, and takes about five hours, Caltrans said.

Another photo shows the state State Route 3 on March 16, 2016. (Credit: Caltrans District 2)

Another photo shows the state State Route 3 on March 16, 2016. (Credit: Caltrans District 2)

By Wednesday afternoon, another option had opened to four-wheel drive vehicles after snow and trees were cleared from East Side/Trinity Mountain Road, which had been closed for winter. Officials warned there was “a lot of ice.”

It could take up to eight weeks for traffic flow to be restored on State Route 3, with complete repair taking up to three months, Caltrans said.

Northern California has seen heavy rain amid an El Niño that was expected to drench Southern California instead. Storms battered the region when the highway failed, and Caltrans said soils were “very saturated” when the road gave way.

The site of the failure is between the towns of Trinity Center and Weaverville, near the Trinity Dam. The road runs through the Shasta-Trinity National Forest.

The highway was closed from 10 miles north of Weaverville to 18 miles south of Trinity Center.

A Google Maps image shows the approximate location of the roadway failure.

A Google Maps image shows the approximate location of the roadway failure.

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