Upper San Leandro Reservoir
| Upper San Leandro Reservoir | |
|---|---|
Aerial view of part of the reservoir in 2020 | |
| Location | San Leandro, California |
| Coordinates | 37°46′33″N 122°07′03″W / 37.77583°N 122.11750°W |
| Primary outflows | San Leandro Creek |
| Catchment area | 21.5 sq mi (56 km2) |
| Managing agency | East Bay Municipal Utility District |
| First flooded | 1926 |
| Max. length | 6 mi (9.7 km) |
| Surface area | 620 acres (250 ha) |
| Water volume | 42,000 acre⋅ft (52,000,000 m3) |
| Surface elevation | 459 ft (140 m) |
Upper San Leandro Reservoir is an artificial lake in Alameda County and Contra Costa County, California which provides water for the East Bay Municipal Utility District (EBMUD). It is impounded by the earth-filled San Leandro Dam on San Leandro Creek, located at the southeast end of the lake.
Although it receives some runoff from its local watershed, most of the water is imported via the Mokelumne Aqueduct. The reservoir has a capacity of about 42,000 acre-feet (52,000,000 m3), though its normal volume is about 30,250 acre-feet (37,310,000 m3). The reservoir name includes "Upper" to distinguish it from Lake Chabot, several miles downstream, which was originally known as "Lower San Leandro Reservoir".