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 October 24, 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 78 13 (20) 10
Escondido, City of Dixon 2,606 2,312 89 (20) 27
Escondido, City of Wohlford 6,506 2,488 38 168 0
Fallbrook P.U.D. Red Mountain 1,335 363 27 3 (98)
Helix W.D. Cuyamaca 8,195 515 6 196 (36)
Helix W.D. Jennings 9,790 7,642 78 670 211
Poway, City of Poway 3,330 2,549 77 (313) (41)
Rainbow M.W.D. Morro Hill 465 117 25 (72) (98)
Ramona M.W.D. Ramona 12,000 2,511 21 6 (13)
San Diego County Water Authority Olivenhain 24,375 19,487 80 (2,171) 85
San Diego, City of Barrett 34,806 1,850 5 89 (27)
San Diego, City of El Capitan 112,807 23,486 21 (6,839) (212)
San Diego, City of Hodges 30,633 11,248 37 629 (200)
San Diego, City of Lower Otay 49,849 36,475 73 (813) 224
San Diego, City of Miramar 6,682 5,438 81 (55) (14)
San Diego, City of Morena 50,694 1,101 2 (275) (9)
San Diego, City of Murray 4,684 4,067 87 58 23
San Diego, City of San Vicente 249,358 181,816 73 58,456 (873)
San Diego, City of Sutherland 29,508 2,104 7 (86) (55)
San Dieguito W.D. San Dieguito 883 324 37 (52) (91)
Sweetwater Authority Loveland 25,400 6,991 28 (195) (82)
Sweetwater Authority Sweetwater 28,079 2,816 10 (332) (60)
Valley Center M.W.D. Turner 1,612 1,092 68 67 1
Vista I.D. Henshaw 51,774 2,383 5 (337) 51
Totals   745,971 319,252 43 48,764 (1,275)

Date generated: 10/24/2016

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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