Reservoirs

Seven major stream systems originate in the mountains of San Diego County and drain to the Pacific Ocean. Runoff from these seven watersheds supplies 24 reservoirs that have a combined capacity of about 746,000 acre-feet.

 

The last major increase in regional water storage capacity was in 2014 when then San Vicente Dam Raise was completed, adding 152,000 acre-feet of capacity. While the region’s reservoirs were built mainly as water supply projects, many of them also provide other benefits such as recreation and flood reduction.

Since the major statewide drought of 1976-1977, annual surface water use from local reservoirs has ranged from 4,100 acre-feet in fiscal year 2015 to 140,300 acre-feet in fiscal year 1984. Over the past two decades, annual local surface water use has averaged approximately 60,000 acre-feet, or about 10 percent of the region’s average total annual water use.

Map of San Diego County Reservoirs

icon_pdf.pngLocal Rainfall and Reservoirs Fact Sheet

Metropolitan Water District of Southern California Reservoirs

Local reservoir storage, in acre-feet, for Water Authority member agencies - As of June 27, 2016

Agency Reservoir Capacity (AF) Storage (AF) % of Capacity Change from Year Earlier (AF) Change from Month Earlier (AF)
Carlsbad M.W.D. Maerkle 600 135 22 (40) 7
Escondido, City of Dixon 2,606 2,365 91 60 (27)
Escondido, City of Wohlford 6,506 2,446 38 112 308
Fallbrook P.U.D. Red Mountain 1,335 832 62 (216) 28
Helix W.D. Cuyamaca 8,195 768 9 345 (65)
Helix W.D. Jennings 9,790 8,869 91 (105) 50
Poway, City of Poway 3,330 3,156 95 72 96
Rainbow M.W.D. Morro Hill 465 148 32 88 0
Ramona M.W.D. Ramona 12,000 2,537 21 121 19
San Diego County Water Authority Olivenhain 24,375 20,552 84 (995) (107)
San Diego, City of Barrett 34,806 2,078 6 164 (59)
San Diego, City of El Capitan 112,807 24,836 22 (6,788) (315)
San Diego, City of Hodges 30,633 11,708 38 655 (507)
San Diego, City of Lower Otay 49,849 36,251 73 (1,127) 90
San Diego, City of Miramar 6,682 5,465 82 41 109
San Diego, City of Morena 50,694 1,338 3 (236) (46)
San Diego, City of Murray 4,684 4,083 87 56 (23)
San Diego, City of San Vicente 249,358 185,670 74 79,270 655
San Diego, City of Sutherland 29,508 2,386 8 0 (66)
San Dieguito W.D. San Dieguito 883 344 39 (330) (80)
Sweetwater Authority Loveland 25,400 7,414 29 (91) (87)
Sweetwater Authority Sweetwater 28,079 3,215 12 (258) (99)
Valley Center M.W.D. Turner 1,612 1,167 72 42 (33)
Vista I.D. Henshaw 51,774 4,484 9 107 (1,070)
Totals   745,971 332,249 44 70,733 (1,222)

Date generated: 06/29/2016

Note: Each reservoir’s change in storage level is a function of its unique operational characteristics, which may include movement of imported and local water supplies in and out of the reservoir as well as surface water capture from local rainfall.
 

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