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Eastern San Joaquin Groundwater Basin Groundwater Management Plan Northeastern San Joaquin County Section 1 Groundwater Banking Authority 31 Introduction SEWD completed the Farmington Groundwater Recharge and Seasonal Habitat Study (Farmington Study) in conjunction with the United States Army Corps of Engineers and other local agencies in 2001. The Farmington Study identified areas suitable for recharge and seasonal habitat development, evaluated recharge techniques, conducted pilot recharge tests, developed a final report and recharge guide, and developed an implementation strategy for the phased Farmington Program. In 2003, SEWD completed the Pilot Phase of the Farmington Program, which consists of 60 acres of recharge ponds and fields adjacent to the SEWD Water Treatment Plant. The Demonstration Phase beginning in 2003 will investigate and construct up to 1,200 acres of recharge ponds and fields. In 2003, SEWD applied for a Proposition 13 Groundwater Recharge Storage Construction Grant for the Peters Pipeline portion of the Farmington Program. The proposed project consists of a six-mile long 60-inch diameter pipeline, which will distribute irrigation and recharge water as well as water to the SEWD Water Treatment Plant. At the regional level, SEWD has participated as a member agency of the Eastern Water Alliance and the Authority. Central San Joaquin Water Conservation District – The CSJWCD was formed in 1959 under provisions of the California Water Conservation Act of 1931. The CSJWCD includes approximately 65,100 acres, of which 670 acres are within the sphere of influence for the City of Stockton. CSJWCD has not adopted formally an AB 3030 Plan, however, in 1997, to mitigate declining groundwater levels, the District participated in the Goodwin Tunnel Project for the use of New Melones water subject to the contract with the USBR. The contract amount calls for 49,000 af/yr of firm yield and up to an additional 31,000 af/yr on an interim basis to the District. Under the existing New Melones Reservoir operations plan, the contracted amount has never been fully delivered. Irrigation facilities have been installed and operated by individual landowners through a surface water incentive program sponsored by the District. At the regional level, CSJWCD has participated as a member agency of the Eastern Water Alliance and the Authority. South San Joaquin Irrigation District – Formed in 1909 under the Irrigation District Act, SSJID comprises about 72,000 acres in the southeastern portion of San Joaquin County, all of which is located within the Basin. The cities of Manteca, Ripon and Escalon comprise approximately 10,000 acres of the District area. SSJID is allocated half of 600,000 af/yr from the Stanislaus River with the other half going to Oakdale Irrigation District. SSJID owns and operates an extensive system of conveyance structures and canals. Adopted in 1993, the Plan outlines the efforts of the district to maintain groundwater levels and continue to utilize its surface water entitlements. As part of the plan, SSJID began regularly monitoring their irrigation wells for water quality. Before the Plan, only the municipal wells used for drinking water supply were tested because of Health Department requirements. SSJID also uses agricultural sites during the off-season for recharge and plans to implement recharge and wellhead protection areas to safeguard groundwater quality.