The regional project will replace deteriorating groundwater supplies with safe, more reliable surface water supplies from the Sacramento River. Once complete, the project will serve more than two-thirds of the urban population of Yolo County, CA. It will also serve UC Davis, a project partner.
Project plans include a jointly-owned and operated intake on the Sacramento River (WDCWA in partnership with RD 2035), raw water pipelines connecting the intake to a new regional water treatment plant, and separate pipelines delivering treated water to Woodland, Davis and UC Davis. Improvements to existing water supply systems will vary for Woodland and Davis and will include facilities such as distribution pipelines, water storage tanks and booster pump stations.
The project will divert up to 45,000 acre-feet of water per year from the Sacramento River. Water rights were granted in March 2011, and will be subject to conditions imposed by the state. Water diversions will be limited during summer and other dry periods. A more senior water right for 10,000 acre feet was purchased from the Conaway Preservation Group to provide summer water supply. Groundwater will continue to be used by Woodland and Davis during when demand for water cannot be met with surface water supplies alone.
The water treatment facility will be constructed to supply up to 30 million gallons of water per day, with an option for future expansion to 34 million gallons per day. Of that amount, Woodland's share of treated surface water will be 18 million gallons per day, with Davis' share at 12 million gallons per day. Approximately 5.1 miles of pipeline will transport "raw" water from the surface water intake on the Sacramento River to the water treatment plant located south of Woodland (see map). From there, the treated water will travel 7.8 miles via pipeline to Davis, and up to 1.4 miles to Woodland.
Based upon the most recent engineering estimates, the development and construction of the Project is expected to cost roughly $245.01 million (in April 2012 dollars, which is a reduction from the original cost estimate of $325 million in mid-2009 dollars). This estimate, which includes expenditures since 2009 and local facility costs, is expected to change as a result of aggressive cost-savings activities and refinements to project plans. Click here to view the history of project cost estimates.
The bulk of the project will be funded through customer water rates. The Agency is looking for ways to reduce Project cost impacts to customers, to include:
View the project map and video.
The regional water supply project is scheduled for design between now and 2013, for construction between 2013 and 2015, and for operation in 2016. Click here to view the schedule for selecting a Design-Build-Operate contractor.