Granite wins $173m Sacramento River weir widening contract

Image: Granite Construction

US contractor Granite has won a $173 million weir widening contract along the Sacramento River by the US Army Corp of Engineers.

The project, which involves the construction of various elements along the river, is designed to reduce regional flood risk by decreasing water surface elevation.

Granit’s work involves 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.

The fish passage will help prevent federal- and state-listed species from being stranded in the river and from within the bypasses after floor events. The 25-span bridge will allow local traffic to cross over the new weir structure.

Construction will include extensive excavation and the building of new levee embankments.

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 Aggregate Plant will supply more than 28,000 tons of aggregates for various portions of the project, including road base and structural backfill materials.

Additionally, 6,000 tons of hot mix asphalt (HMA) will be supplied by Granite’s Bradshaw Asphalt Plant and utilized 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.