Type reservoir Surface elevation 93 m Phone +1 510-223-1661 | Primary inflows Basin countries United States Catchment area 60.53 km² Inflow source San Pablo Creek | |
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Address 7301 San Pablo Dam Rd, El Sobrante, CA 94803, USA Similar San Pablo Creek, Briones Reservoir, Kennedy Grove Regional, Wildcat Canyon Regional, Lafayette Reservoir | ||
San pablo reservoir spillway 012217
The San Pablo Reservoir is an open cut terminal water storage reservoir owned and operated by the East Bay Municipal Utility District (EBMUD). It is located in the valley of San Pablo Creek, north of Orinda, California and south of El Sobrante and Richmond, east of the Berkeley Hills between San Pablo Ridge and Sobrante Ridge.
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San Pablo DamEdit
The earthen San Pablo Dam, built in 1919, is located at the El Sobrante end of the reservoir, above Kennedy Grove. The reservoir has a total capacity of 38,600 acre feet (47,600,000 m3), and a watershed of 23.37 square miles (60.5 square kilometres). A water tunnel runs under the hills to the west from the reservoir to a pumping plant in Kensington. The San Pablo Dam Road runs along the west side of the reservoir. EBMUD's Briones Reservoir is in the hills southeast of the San Pablo Reservoir and drains into the reservoir.
Although the dam impounds the waters of San Pablo Creek, the great bulk of its water is imported via the Mokelumne Aqueduct from Pardee Reservoir located over a hundred miles to the east in the Sierra Nevada foothills.
San Pablo Reservoir Recreation AreaEdit
EBMUD owns and maintains the San Pablo Reservoir Recreation Area, which consists of boating and fishing access to the reservoir itself, and some watershed land on the west side of the reservoir. EBMUD charges $7 for daily entrance into the park. The recreation area is managed under contract by Urban Parks Concessionaires (UPC) and includes a restaurant (The San Pablo Grill) and gift shop, where fishing permits can be purchased and boats can be rented. There are picnic areas available, a children’s play area and a boat launch ramp.
Because this reservoir is a storage facility for drinking water, swimming and wading are prohibited. Fishing, boating, and canoeing are allowed. However, to reduce the possibility of gasoline components in the reservoir, only four-cycle engines using MTBE-free gasoline are allowed.
There is a 5 1⁄2 miles (8.9 km) hiking and biking trail along the west side of the reservoir. Most of this trail is on the Old San Pablo Dam Road, replaced in the 1950s by the current San Pablo Dam Road. It is not possible to legally circumnavigate the reservoir on hiking trails. While there are trails on the east side of the reservoir to accommodate a circumnavigation, they are off limits even to people with EBMUD Trail Permits, and the roadway on top of San Pablo Dam proper is similarly restricted.
Many anglers fish on the reservoir for smallmouth bass, white sturgeon, bluegill and crappie, along with the regularly planted trout and catfish. (Read 2009 California EPA Health Advisory Guidelines on safety of eating fish from San Pablo Dam Reservoir)
San Pablo Reservoir was the potential venue for the rowing and canoe races in the case that San Francisco would host the 2024 Summer Olympics. This would not have been the first time the reservoir would host a rowing regatta. Starting May 2015 the Oakland Strokes organize the USRowing Southwest Masters Regional Championships on San Pablo.
Seismic RetrofitEdit
In October 2004, a study commissioned by EBMUD concluded that a major earthquake on the Hayward Fault could cause the San Pablo Dam to settle as much as 35 feet (11 m). As a short-term measure, the District lowered the reservoir level by 20 feet (6.1 m) to create a 35-foot (11 m) buffer.
The dam was seismically retrofitted without going out of commission by mixing concrete into the soil at the toe of the dam. Besides that a new buttress layer has been added above that on the downstream side of the dam. Construction began August 2008 and was completed in September 2010.