MWH Global awarded contract for Sacramento River fish screen construction

Consulting firm MWH Global has been awarded a US$5.15 million contract to provide construction management and engineering services by Reclamation District 2035 for its Joint Intake and Fish Screen Project.

The project will replace an existing an intake that is more than a century old, and is the largest unscreened facility on the Sacramento River. RD 2035 diverts water from the river to irrigate about 15,000 acres of crops.

The new facility will draw water from the river through perforated metal screens, MWH Global said, to “ensure that offspring of migrating salmon, steelhead and other fish species will not be injured as they pass by the structure.” Pumps located inside the screens will pressurize water, enabling it to travel through a pipeline to a regional water treatment facility. A separate set of pumps will then provide pressurized water to scour the floor of the intake facility to help remove settled silt and sand normally present in the river. The company said the facility will be able to move up to 400 cubic feet of water per second of river water.

“This project addresses two of the most pressing water issues facing the Central Valley of California: cooperation between agricultural and municipal interests and replacement of outdated infrastructure with an environmentally friendly, best-practice facility,” MWH official Marshall Davert said.

The $44 million project is a partnership between RD 2035 and the cities of Woodland and Davis, as represented by the Woodland Davis Clean Water Agency, with more than $16 million in funding from the Central Valley Project Restoration Fund, Department of the Interior, Bureau of Reclamation and Proposition 40 funds from the State of California.

MWH will provide feasibility level analyses, preliminary and final designs, and environmental permitting.

“MWH is extremely proud to be a partner with RD 2035 and the cities of Woodland and Davis on this landmark project,” Davert said.

Construction of the intake, pump station and appurtenant facilities is expected to be completed by 2017.

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Michael Harris formerly was Editor for HydroWorld.com.

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