Until the completion of the regional surface water supply project in 2016, the Cities of Woodland and Davis had always relied on groundwater for 100 percent of their drinking water supplies. The original water supply systems were built decades ago, when the quality and quantity of the water was adequate to meet needs. Faced with declining groundwater quality and increasingly strict water quality regulations, the Cities partnered in 2009 to develop a new water supply from the nearby Sacramento River.
The regional surface water project, consisting of a new water treatment facility south of Woodland and a new intake on the Sacramento River (jointly constructed and operated with Reclamation District 2035), was completed in 2016. In the future, the project will provide approximately 85-95 percent of Woodland and Davis customers’ water needs in normal years. UC Davis also receives water from the project.
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.
Project development and implementation is expected to cost $279.2 million. The bulk of the project will be funded through customer water rates. Actions to reduce Project cost impacts to customers, included:
View the project map and video.
Construction on the regional water treatment facility began April 2014. The facility was completed in July 2016.
Reclamation District 2035 and the Woodland-Davis Clean Water Agency are ...
WDCWA Board Meeting, April 20, 2017 - Davis at 3:00 p.m.