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Basin 8-1 Overview that is in the Santa Ana Canyon Management Area. OCWD has been managing the majority of Basin 8-1 since its formation in 1933. • The South East Management Area includes the southern and southeastern portion of Basin 8-1 that is hydrogeologically connected to the OCWD Management Area but is outside of OCWD's service area. This area consists of several, disconnected, small fringe areas that are within the DWR designated boundary of Basin 8-1. This management area includes areas under the jurisdiction of the IRWD, the El Toro Water District and the City of Orange. The groundwater basin in this area is thin and contains more clay and silt deposits than aquifers in the OCWD Management Area. Groundwater historically has flowed out of this area into the OCWD Management Area. Production has been minimal in this area due to hydrogeological conditions with little potential for significant future increases. • The Santa Ana Canyon Management Area includes the easternmost section of Basin 8- 1. This area includes land under the jurisdiction of several cities, two counties, and two water districts, including a portion that is within the OCWD service area. Groundwater production is relatively minor compared to groundwater production in the OCWD Management Area. The western boundary of this management area is located at Imperial Highway in the city of Anaheim where the basin thickness begins to increase. Imperial Highway crosses the Santa Ana River where OCWD begins to divert river water into the recharge facilities for percolation into the groundwater basin. The Basin 8-1 Alternative is organized as follows: • Overview: Provides a map and description of Basin 8-1 and a brief description of the basin management areas. • Hydrogeology of Basin 8-1: Provides a description of the hydrogeology of Basin 8-1 including a description of the basin, the aquifer systems, fault zones, total basin volume, basin cross -sections, basin characteristics, and general groundwater quality. • La Habra -Brea Management Area: Provides a description of sustainable management of the La Habra -Brea Management Area • OCWD Management Area: Provides a description of sustainable management of the OCWD Management Area • South East Management Area: Provides a description of sustainable management of the South East Management Area • Santa Ana Canyon Management Area: Provides a description of sustainable management of the Santa Ana Canyon Management Area 2017 BASIN 8-1 ALTERNATIVE Overview 3 55D-48