California Construction News staff writer
California-based Granite Construction has won a $173 million weir widening contract along the Sacramento River by the US Army Corp of Engineers.
Construction along the river will reduce the regional flood risk by decreasing water surface elevation.
Granit’s work includes widening the weir and the construction of a new fish passage structure and a bridge for vehicles connecting Old River Road to just north of West Sacramento.
Construction will include extensive excavation and the building of new levee embankments.
The weir widening project is expected to run from July 2023 through December 2026. It is planned to lower water surface elevation through extensive excavation in addition to the said efforts. A 25-span vehicular bridge will also be built to connect Old River Road to communities north of the project.
USACE Sacramento District will fund the construction using the Emergency Supplemental Appropriations in the Bipartisan Budget Act of 2018.
Structural concrete for the project will include a weir crest structure with an adjoining stilling basin, a fish passage and fish ladder facility, and the vehicle bridge structure.
Granite’s Capay plant will supply more than 28,000 tons of aggregates for various portions of the project, including road base and structural backfill materials.
Also, 6,000 tons of hot mix asphalt (HMA) will be supplied by Granite’s Bradshaw asphalt plant to build roadways and access routes on the project.
The project is planned to begin in July 2023 and is expected to be completed in December 2026.