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Eastern San Joaquin Groundwater Basin Groundwater Management Plan Northeastern San Joaquin County Section 8 Groundwater Banking Authority 108 Integrated Conjunctive Use Program demand for surface water to less than 3,000 af per year. Water demands in the EBMUD service area are not expected to rise considerably over the next 20 to 40 years. Water for NSJWCD is available from the Mokelumne River in above average and wet years. Additional supply from the Mokelumne River is possible in a major regional conjunctive use project. The Mokelumne River Regional Water Storage and Conjunctive Use Project (MORE WATER Project) is currently being studied by the Mokelumne River Water and Power Authority (MRWPA). In 1990 the MRWPA submitted applications to the SWRCB for unappropriated flood flows on the Mokelumne River from December 1 to June 30. The application seeks to divert up to 1000 cfs to storage and up to 620 cfs for direct use. Historic alternatives for capturing the water include Middle Bar Dam and on-stream reservoir, Duck Creek Reservoir and off-stream diversion, and direct diversions on the Lower Mokelumne River from Camanche Reservoir to Interstate 5. Preliminary studies have shown that substantial ‘new water’ is available for use in Eastern San Joaquin County; however, the facilities necessary to capture water intermittently are expensive and may remain idle in some years. Table 8-2 depicts the available water from the Mokelumne River surplus to all in-stream and user requirements over the historic 74-year hydrologic record. Based on the historic Mokelumne Hill gage record, there is substantial water available on an interim basis as depicted in Figure 8-2. 8.1.4 Sacramento-San Joaquin Delta The City of Stockton has long looked to the Sacramento-San Joaquin Delta as a potential source of water to meet long-term needs. In 1996 the City of Stockton submitted an application to the SWRCB seeking an increasing amount of water from 20,000 af initially up to 125,900 af per year. The Delta Water Supply Project seeks to replace existing surface supplies subject to future reductions, protect and restore groundwater levels to within a target safe yield of 0.6 af per acre, and provide a reliable water supply for planned growth outlined in the 1990 City of Stockton General Plan. The basis for the water right is Water Code Section 1485 whereby an agency may appropriate water from the Delta in a like amount to water discharged upstream into the San Joaquin River less any losses and the Area of Origin and Delta Protection Statutes which were enacted to protect against water exports. Any new diversion from the Delta is extremely contentious. Figure 8-2 Mokelume River Flow Duration Curve Mokelumne River Hill Gage 0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 0% 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% Percent of Time Flow ExceedAnnual Flow (thousand af)