Camanche Dam
| Camanche Dam | |
|---|---|
Camanche Dam and Lake, looking north
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| Country | United States |
| Location | San Joaquin County, California |
| Coordinates | 38°13′27″N 121°01′24″W / 38.22417°N 121.02333°WCoordinates: 38°13′27″N 121°01′24″W / 38.22417°N 121.02333°W |
| Status | In use |
| Opening date | 1963 |
| Owner(s) | East Bay Municipal Utility District |
| Dam and spillways | |
| Type of dam | Earthfill |
| Impounds | Mokelumne River |
| Height | 171 ft (52 m) |
| Length | 2,400 ft (730 m) |
| Reservoir | |
| Creates | Camanche Reservoir |
| Total capacity | 431,000 acre·ft (0.532 km3) |
| Catchment area | 619 sq mi (1,600 km2) |
| Surface area | 7,770 acres (3,140 ha) |
| Power station | |
| Installed capacity | 10.7 MW |
| Annual generation | 17,622,000 KWh |
Camanche Dam is an earthfill Dam on the Mokelumne River in the central California, about 20 mi(32 km) from East Lodi. The Dam and reservoir lie in the Sierra Nevada foothill in San Joaquin County. Camanche Dam was constructed in 1963 and completed in 1964, and it is operated and owned by East Bay Municipal Utilities District ( EBMUD). The purpose of building Camanche Dam and reservoir is to provide flood control, water flows for agriculture, habitat for fisheries and recreation for community.
The dam impounds Camanche reservoir. The capacity of Camanche Dam is approximately 431,000-acre feet (0.532 km3) with 200,000-acre feet (0.25 km3) of the flood control reservation. This reserved for flood storage can be shared with Pardee Dam just upstream. The dam is about 173-foot-high and 2,640-foot-long dam located on the Mokelumne River which is about 10 miles downstream from Pardee Dam. Since Camanche Dam has a 627-square-mile drainage area which is accounting about 95 percent of the watershed, therefore Camanche Dam and reservoir provide flood damage reduction on the Mokelumne River. Camanche Dam and reservoir also are operated to maintain downstream water requirements.
Before the dam was built, it cost a lot of money to maintain flood control along the Mokelumne river. The most destructive flood in November 1950 along the Mokelumne river resulted in approximately $1.1 million in damage. Another flood in December 1955 thru January 1956 created nearly $750,000 in damage. The largest flood record in December 1964 along the Mokelumne River. After the completion of Camanche Dam in April 1964, the damage was limited to several thousand dollars. Early 1964, the Camanche Dam's operation had further reduced in spring flows and slightly increased in summer and fall flows below Camanche Dam. Since the completion of Camanche Dam, the downstream flow has remained relatively constant throughout the year. Based on flow at Camanche Dam, the 50 percent exceedance flow peaks at about 700 cubic feet per second (cfs) during the height of the irrigation season (June) and declines to between 200-300 cfs during the winter. The 10 percent exceedance flow (high flow) ranges between 1,000 cfs (September) and 2,700 cfs (May) throughout the year, with the flow about 2,000 cfs from January through May. The 90 percent exceedance flow (low flow) only ranges between about 100 and 300 cfs throughout the year; the highest flows occur from May through August because of downstream water deliveries to the Woodbridge Irrigation District (WID).
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