2025 Urban Water Management Plan

Section 6 2025 Urban Water Management Plan Water Supply Characterization City of Pleasanton Public Draft | May 2026 6-26 EKI Environment & Water, Inc. 6.8 Future Water Projects Pleasanton itself does not have any plans for new water supply projects (Table 6-8). However, as described in Section 6.2.3.4, Pleasanton is working with Zone 7 to develop new groundwater wells to enable the City access to its full GPQ. This project is intended to allow Pleasanton to continue accessing its existing supplies (rather than developing new supplies). Table 6-8 Expected Future Water Supply Projects or Programs (DWR Table 6-7) ☒ No expected future water supply projects or programs that provide a quantifiable increase to the agency's water supply. As Zone 7 purchases are Pleasanton’s primary source for potable water, the City supports Zone 7’s efforts to pursue opportunities to improve water supply reliability. As SWP reliability continues to decline and the Tri-Valley population grows, Zone 7 anticipates future supply deficits and, as a result, is pursuing several opportunities to obtain additional water storage and water supplies, address the need for alternative conveyance in the Delta, and improve access to groundwater and local emergency supplies. As part of the 2022 WSE Update, Zone 7 evaluated potential future water projects and anticipated contributions to improving reliability of its water supply system. Zone 7 expects that a portfolio (i.e., likely a subset) of projects will be needed to address future supply deficits. Projects that Zone 7 is continuing to consider are described in the following subsections. 6.8.1 Supply Projects 6.8.1.1 Delta Conveyance Project The Delta, a key conveyance component of the SWP, is increasingly threatened by ecosystem considerations, seismic risk, and climate change/sea level rise, reducing the reliability of the SWP system. The Delta Conveyance Project (DCP) will reduce these risks and partially restore the SWP’s projected reliability. In early 2019, Consistent with Executive Order N-10-19, the state announced a single tunnel project, which proposed a set of new diversion intakes along the Sacramento River in the north Delta for the SWP. In 2019, DWR initiated planning and environmental review for the single tunnel (i.e., the DCP) to protect the reliability of SWP supplies from the effects of climate change and seismic events, among other risks. On December 21, 2023, DWR certified the Environmental Impact Report and approved the DCP selecting Bethany Reservoir Alignment for further engineering, design, and permitting. DWR received the Incidental Take Permit for the DCP from the California Department of Fish and Wildlife (DFW) in February 2025. Currently, DWR is in the process of obtaining a change in point of diversion permit from the SWRCB to  CWC §10631 A plan shall be adopted in accordance with this chapter and shall do all of the following: (b) (3) For any planned sources of water supply, a description of the measures that are being undertaken to acquire and develop those water supplies. (f) Include a description of all water supply projects and water supply programs that may be undertaken by the urban water supplier to meet the total projected water use, as established pursuant to subdivision (a) of Section 10635. The urban water supplier shall include a detailed description of expected future projects and programs that the urban water supplier may implement to increase the amount of the water supply available to the urban water supplier in normal and single-dry water years and for a period of drought lasting five consecutive water years. The description shall identify specific projects and include a description of the increase in water supply that is expected to be available from each project. The description shall include an estimate with regard to the implementation timeline for each project or program.