Final Report, 2010 Urban Water Management Plan - Culver City

Table 4-7 lists factors affecting wholesale supply for the Culver City System. Metropolitanintends to provide 100 percent supply reliability to WBMWD, which in turn provides 100 percentreliability of imported water supply to the Culver City System. Although no factors are expectedto affect the overall reliability of supply, a detailed discussion of wholesale supply factors thatwere considered may be found in the WBMWD 2010 UWMP.Table 4-7:Factors Affecting Wholesale SupplyName of Supply Legal Environmental Water Quality ClimaticWBMWD N/A N/A N/A N/ANote:Table format based on DWR Guidebook Table 29.4.7 DesalinationThis section presents a discussion of opportunities to use desalinated water as a supplementalfuture water supply source for the Culver City System. Section 10631(i) of the Act requires anevaluation of desalination opportunities within the Culver City System. The Act states thefollowing:Section 10631(i) Describe the opportunities for development of desalinated water, including, but not limited to, oceanwater, brackish water, and groundwater, as a long-term supply.Wholesalers providing water to the Culver City System are actively pursuing seawaterdesalination projects. Water produced by these desalination projects would increase the totalavailable water supply for the wholesalers and would, in-turn, improve the reliability of watersupply for the Culver City System. However, it is not possible at this point to quantify the amountof desalinated water that will be available for the Culver City System. The following discussionsummarizes the desalination plans of water wholesalers. Metropolitan and its member agency,WBMWD view seawater desalination as a component of a diversified water supply portfolio.Recent and continuous breakthroughs in membrane technology have helped to reducedesalination costs, leading to the consideration of desalination among the alternative resourceoptions outlined in Metropolitan’s 2010 Integrated Resources Plan (IRP) Update. This updatedplan describes a diversified regional strategy to include recycled water, groundwater recharge,and seawater desalination in its portfolio of methods to ensure robust water supply reliability. In2001, Metropolitan established the Seawater Desalination Program to encourage its memberagencies to develop desalination projects. In the 2004 IRP Update, Metropolitan established atarget goal of up to 150,000 ac-ft/yr of desalination capacity from its retailers by 2025. This is animportant component of the total estimated water supply production for the region.Metropolitan is also involved in efforts to assess current desalination projects and to compareproject features and applicability to Southern California. Furthermore, Metropolitan, inassociation with member agencies, is involved in assessing established and emergingdesalination treatment technologies, pretreatment alternatives, and brine disposal issues; aswell as the permitting and regulatory approvals associated with the delivery of desalinatedseawater to regional and local distribution systems.Page 4-6Final Report, 2010 Urban Water Management Plan – Culver CityGolden State Water Companyg:\adminasst\jobs\2010\1070001.00_gswc-uwmp\09-reports\9.09-reports\2011-08\grp3\gswc_culvercity_2010_uwmp-final.doc