Small tanker with trailer slide off West Lake Sammamish Parkway offramp

A small tanker with a trailer slid off a West Lake Sammamish Parkway offramp from State Route 520 this morning and into a dry stream bed.

Washington State Patrol trooper Rick Johnson added that the tanker — traveling eastbound on 520 before taking the offramp — ended up about 15 to 20 feet off the road. He reported that there were no injuries and no other vehicles were involved.

Johnson said the paving company driver realized his brakes weren’t working as he traveled down the offramp and skimmed along the guardrail and across the embankment.

Clean up is now completed and all lanes are back open.

Redmond Police Department (RPD) received the call at about 9 a.m., according to public information officer Andrea Wolf-Buck, and city public works employees headed on site to help with clean up.

Wolf-Buck said there was a small amount of tack material that spilled out of the tanker during the incident, but it was promptly cleaned up and there is no threat to the environment. Department of Ecology members were onsite with public works employees monitoring the situation, she added.

For a time, cars were using the offramp while cleanup was taking place on the side of the ramp and on the edge of West Lake Sammamish Parkway. Traffic was slow on the offramp and both southbound lanes of West Lake Sammamish Parkway were closed while the tanker was towed out; the center turn lane was being used for southbound traffic, according to RPD’s Twitter page.

The trailer was parked on the side of the road during clean up and tanker towing.

Small tanker with trailer slide off West Lake Sammamish Parkway offramp