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Update, 2:50 p.m.:

Highway 101 remains closed in both directions north of Laytonville in Mendocino County. The CHP expects one-way controlled traffic to resume later tonight.

“Fuel tanks have been pumped out by HAZMAT…should be done tonight around 2100 HRS,” according to an update on the CHP Incident Information Page. “Once the truck and [trailer] are removed we can have one-way traffic control in place.”

An earlier update indicated the spill was close to but had not reached a nearby waterway. 

Update, 10:40 a.m.:

Bell Springs Road is closed a half-mile north of Highway 101, according to the CHP Incident Information Page. Highway 101 remains closed.

A spokesperson with the Laytonville Volunteer Fire Department told the Outpost traffic is being directed to Branscomb Road and State Route 20.

Previously:

An overturned big rig carrying hazardous chemicals has completely shut down traffic on U.S. Highway 101 just south of Bell Springs Road in northern Mendocino County. There is no estimated time of the highway reopening at this time.

The California Highway Patrol reported a traffic collision shortly after 5:15 a.m. involving a semi hauling corrosive chemicals including “organic peroxide, phosphoric acid and sodium hydroxide,” according to the CHP Incident Information Page. No injuries have been reported.

At 5:54 a.m. the CHP reported “leakage of two to five gallons” on the roadway and requested a clean-up crew. Residents in the surrounding area are being advised to shelter in place due to the chemical spill.

We will update this post when we know more.