NORTHERN CALIFORNIA– The Oakville Crossroad bridge, over the Napa River between Highway 29 and Silverado Trail in Napa County, will reopen 10 a.m. Thursday, Jan. 21.
The bridge was closed May 22, 2015, as a result of damage from a 4.1-magnitude earthquake.
At that time – the west abutment, the base that held up the west end of the bridge – sank 4 inches, pulling apart existing cracks on the then-nearly 100-year-old bridge, and exposing structural steel. It was closed to vehicles, bicycles and foot traffic.
The bridge was demolished, and a new one stands in its place.
The project cost is about $7 million, which was primarily funded by the Federal Highway Administration.
The new reinforced concrete box-girder bridge is 33-feet-wide by 120-feet-long. The structure will carry two lanes of traffic and passes over the Napa River at a higher elevation (about 3 feet higher) to meet current hydraulic design standards.
The road approaches were widened and raised to meet the new bridge elevation and width. The channel was re-graded to a roughened channel bottom to accommodate fish passage and rock slope protection was planted on both channel slopes to protect the bridge abutments from scour and erosion.
The project also includes onsite and offsite riparian planting and construction of habitat structures for California Freshwater Shrimp.
Other items include modification to existing culverts and driveways and traffic safety features, such as bridge rails and guardrails.
REGIONAL: Oakville Crossroad bridge to reopen Jan. 21
- Lake County News reports
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