Drivers may face slight delays over the next two weekends as bridge inspectors from the Washington State Department of Transportation inspect the Agate Pass Bridge.

The inspections are planned for 5 to 9 a.m. Saturday, July 13, and Sunday, July 14, and also from 5 to 9 a.m. Saturday, July 20 and Sunday, July 21.

Claudia Bingham Baker, communications manager for the state Department of Transportation’s Olympic Region, said the inspection is the standard, routine review conducted every two years by the state.

Traffic across the bridge will be reduced to one lane, and traffic may occasionally be halted as the inspection is underway. Flaggers will be used to control traffic, Bingham Baker said.

Two weekends are required for the inspection given the comprehensive nature of the examination.

“They take a look at every inch of the bridge. Over those two weekends, we’re allotting 16 hours for them to take a comprehensive look,” Bingham Baker said.

An under-bridge inspection truck, a rig equipped with a long arm and bucket, will be used for the checkup, she said.

The timing of the inspection was based on a review of traffic flow on Highway 305 over the span that crosses Agate Passage.

The Agate Pass Bridge is a steel-truss cantilever bridge that was built in 1950. It is now listed on the National Register of Historic Places.