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 744,000 acre-feet.

The last major increase in regional water storage capacity was in 2014 when then San Vicente Dam Raise was completed, adding 157,000 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 30, 2017

Agency Reservoir Capacity (AF) Storage (AF) % of Capacity Change from Year Earlier (AF) Change from Month Earlier (AF)
Carlsbad M.W.D. Maerkle 600 393 66 274 306
Escondido, City of Dixon 2,606 2,495 96 136 0
Escondido, City of Wohlford 6,506 2,264 35 (210) 0
Fallbrook P.U.D. Red Mountain 1,335 204 15 (165) (215)
Helix W.D. Cuyamaca 8,195 598 7 92 (48)
Helix W.D. Jennings 9,790 8,449 86 422 601
Poway, City of Poway 3,330 2,570 77 27 171
Rainbow M.W.D. Morro Hill 465 465 100 405 180
Ramona M.W.D. Ramona 12,000 2,275 19 (211) (73)
San Diego County Water Authority Olivenhain 24,774 17,810 72 (1,490) (504)
San Diego, City of Barrett 34,806 12,094 35 10,244 (247)
San Diego, City of El Capitan 112,807 39,681 35 16,255 (577)
San Diego, City of Hodges 30,633 17,167 56 5,806 (603)
San Diego, City of Lower Otay 47,067 42,751 91 6,096 (1,983)
San Diego, City of Miramar 6,682 4,897 73 (473) (724)
San Diego, City of Morena 50,694 3,961 8 2,901 (86)
San Diego, City of Murray 4,684 4,075 87 (8) 65
San Diego, City of San Vicente 249,358 187,271 75 5,455 (3,491)
San Diego, City of Sutherland 29,508 13,368 45 11,264 (195)
San Dieguito W.D. San Dieguito 883 298 34 (33) (108)
Sweetwater Authority Loveland 25,400 13,765 54 6,782 (142)
Sweetwater Authority Sweetwater 28,079 11,260 40 8,454 (1,204)
Valley Center M.W.D. Turner 1,612 1,200 74 109 (38)
Vista I.D. Henshaw 51,774 3,560 7 1,110 (1,705)
Totals   743,588 392,869 53 73,240 (10,620)

Date generated: 10/30/2017

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.