Draft Environmental Impact Report - East Bay Municipal Utility District

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Estates Reservoir Replacement Draft Environmental Impact ReportProject DescriptionWater SupplyEBMUD’s primary water source is the Mokelumne River. The Mokelumne Riverwatershed is on the west slope of the Sierra Nevada and is generally contained withinnational forest or other undeveloped lands. Mokelumne River water is stored at thePardee and Camanche Reservoirs, about 90 miles east of the Oakland Area. (3) Waterfrom Pardee Reservoir is conveyed to EBMUD’s service area and terminal storage viathe three Mokelumne Aqueducts. The three Mokelumne Aqueducts, constructedbetween 1925 and 1963, begin at the Pardee Tunnel (in Campo Seco) and terminateabout 90 miles to the west, at the Lafayette Aqueducts in Walnut Creek.Water TreatmentEBMUD operates six water treatment plants (WTP), four of which supply the West ofHills area serving more than 800,000 people. Figure 2-2 depicts the service areaboundaries for the WTPs based on summer demand conditions:Orinda WTP (1935) serves the West of Hills service area (4) and the EstatesReservoir Project area via the Claremont Tunnel, and to the East of Hills servicearea via the Los Altos Pumping Plant.Sobrante WTP (1965) serves the northern part of the service area (Pinole, Hercules,Richmond, El Sobrante, Rodeo, and Crockett).Upper San Leandro WTP (1927) serves the southern part of the service area (southOakland, San Leandro, and Castro Valley).San Pablo WTP (1921) is not used on a regular basis, and supports outages, repairs,and upgrades of other facilities, when they are taken out of service for inspection.Walnut Creek WTP (1967) serves almost all EBMUD customers in the southcentralContra Costa County area (Walnut Creek/San Ramon Valley area).Lafayette WTP (1953) serves the central part of EBMUD service area, includingLafayette, Moraga, and parts of Orinda and Walnut Creek.3 Camanche Reservoir stores water for irrigation and stream-flow regulation, providing flood control and water to meetthe needs of downstream water rights holders]4 Walnut Creek WTP and Lafayette WTP supply water to the eastern portion of EBMUD service area onlysb09_001.doc 2-3 7/22/2009
Estates Reservoir Replacement Draft Environmental Impact ReportProject DescriptionNote: Represents summer demand conditions.Source: EBMUD 2008Water DistributionExisting Water Treatment Plant Service AreaFigure 2-2In addition to water supply and treatment facilities, there are over 4,000 miles of potable(treated water) distribution and transmission pipes, 16 tunnels, 175 potable water reservoirs,130 pumping plants, and numerous other facilities that together provide water service toEBMUD’s customers.Estates Reservoir, shown in the vicinity/location map in Figure S-1, was originallyconstructed in 1903 and raised to its present height and lined with concrete in 1938. Thereservoir was formed by excavating a basin (i.e., open-cut) at the head of a small ravineinto the existing bedrock and constructing an earth fill dam at the west side. A roof wasinstalled in 1968 to help maintain the quality of the treated water, and in anticipation ofsb09_001.doc 2-4 7/22/2009
Page 1: Estates Reservoir ReplacementDraft
Page 4 and 5: TABLE OF CONTENTSEstates Reservoir
Page 6 and 7: Estates Reservoir Replacement Draft
Page 8 and 9: ACRONYMS AND ABBREVIATIONSABABAGAPC
Page 12 and 13: SUMMARYS.1 IntroductionThis Draft E
Page 14 and 15: Estates Reservoir Improvements Draf
Page 42 and 43: Chapter 2Project Description2.1 Ove
Page 58 and 59: Chapter 3Environmental Setting, Imp
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Estates Reservoir Replacement Draft
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3.5 Cultural Resources3.5.1 Approac
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3.6 Traffic and Circulation3.6.1 Ap
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CHAPTER 5Cumulative Impacts, Growth
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CHAPTER 6Report Preparers6.1 Lead A
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APPENDIX APublic InvolvementPublic
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APPENDIX BNotice of PreparationAUGU
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Dingee Pressure Zone Improvement Pr
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FIGURESDingee Pressure Zone Improve
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Draft Environmental Impact Report - East Bay Municipal Utility District

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