Installation of multiple-depth monitoring wells in San Diego Couny 2008–PLATE 1 U.S. DEPARTMENT OF THE INTERIOR PREPARED IN COOPERATION WITH Danskin, W.R., 2008 U.S. GEOLOGICAL SURVEY SWEETWATER AUTHORITY, OTAY WATER DISTRICT, AND CITY OF SAN DIEGO San Diego River Basin Study, 2008 117 30’ 117 15’ 117 00’ 116 45’ 116 30’ 116 15’ 116 00’ 33 15’ SALTON SEA Oceanside Vista Carlsbad San Marcos EscondidoCreek Creek Lake Ysabel Sutherland Santa Escondido San Dieguito River Basin Encinitas Lake Hodges 33 00’ Solana Beach San Diego River Basin Lake Cuyamaca Del Mar Laguna Mountains Penasquitos watershed Miramar San Vicente La Jolla Reservoir Reservoir Canyon El Capitan Santee Reservoir San Diego County Area of Plate 3 (scale: 1:48,000) Imperial County r River El Cajon Sweetwater River Basin Diego Loveland San La Mesa Reservoir 32 River 45’ Pueblo watershed San Diego Sweetwater Pacific Reservoir Point Loma Barrett Wastewater Otay River Basin Lake Treatment Plant National City Lake Point Loma Morena ocean outfall Sweetwater California Chula Vista Lower Otay Reservoir Creek Baja California United States Otay River Mexico Ocean Cottonwood South Bay Tecate Wastewater 18,970 ft Treatment Plant South Bay 4,670 ft ocean outfall 32 Tijuana 30’ Area of Plate 2 (scale: 1:100,000) Islas Presa Aberardo L. De Los Rodriguez Coronados Tijuana River Basin Rosarito 32 15’ Shaded relief base from U.S. Geological Survey 117 15’ 117 00’ 116 45’ 116 30’ 116 15’ 116 00’ digital elevation data, 1:24,000-scale 0 10 20 MILES 01020 KILOMETERS Scale: 1: 300,000 CALIFORNIA U.S.A. Coastal Basins of San Diego County, California, and Study area Northern Baja California, Mexico San Dieguito River Basin San Diego River Basin Sweetwater River Basin Otay River Basin Sweetwater Otay Mtn River Basin San Diego River Basin San Miguel Mtn Recent Drilling Site San Diego Otay River MEXICO Sweetwater Reservoir UNITED STATES (SDOR) 2008 Drilling Site Balboa Park (SDBP) ETPK Los Penasquitos SDAQ SDMC Creek Basin SDAQ Pueblo Tijuana Drainage Basin River Basin SDBP SDNB SDMC TJV1 SDOT TJV3 TJV2 Local features in River basins in study area, Coastal San Diego County, California Location of multiple-depth monitoring well Geohydrology of Coastal San Diego County, California Preliminary By Wesley R. Danskin Subject to Revision 2009.