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

Agency Reservoir Capacity (AF) Storage (AF) % of Capacity Change from Year Earlier (AF) Change from Month Earlier (AF)
Carlsbad M.W.D. Maerkle 600 25 4 (34) (5)
Escondido, City of Dixon 2,606 2,474 95 (28) 34
Escondido, City of Wohlford 6,506 2,174 33 (146) (48)
Fallbrook P.U.D. Red Mountain 1,335 450 34 100 (194)
Helix W.D. Cuyamaca 8,195 454 6 (241) (51)
Helix W.D. Jennings 9,790 8,876 91 1,034 (20)
Poway, City of Poway 3,432 2,956 86 527 130
Rainbow M.W.D. Morro Hill 465 219 47 (114) 117
Ramona M.W.D. Ramona 12,000 2,245 19 30 18
San Diego County Water Authority Olivenhain 24,774 19,556 79 1,160 (554)
San Diego, City of Barrett 34,806 11,400 33 (1,190) (89)
San Diego, City of El Capitan 112,807 27,256 24 (14,550) 758
San Diego, City of Hodges 30,633 11,679 38 (6,938) (206)
San Diego, City of Lower Otay 47,067 31,067 66 (14,156) (41)
San Diego, City of Miramar 6,682 5,535 83 (100) 42
San Diego, City of Morena 50,694 3,301 7 (807) (147)
San Diego, City of Murray 4,684 4,060 87 (69) (38)
San Diego, City of San Vicente 249,358 183,852 74 (7,419) (727)
San Diego, City of Sutherland 29,508 12,706 43 (1,037) (173)
San Dieguito W.D. San Dieguito 883 706 80 63 (40)
Sweetwater Authority Loveland 25,400 13,624 54 (417) (157)
Sweetwater Authority Sweetwater 28,079 4,448 16 (8,276) (137)
Valley Center M.W.D. Turner 1,612 1,125 70 (225) (42)
Vista I.D. Henshaw 51,774 2,272 5 (5,175) (640)
Totals   743,690 352,460 50 (58,008) (2,209)

Date generated: 9/20/2018

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.