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USGS Water-Year Summary 2024
10344490 Boca Reservoir near Truckee, CA
LOCATION - Lat 39°23'20", long 120°05'43" referenced to North American Datum of 1927, in NE 1/4 NW 1/4 sec.28, T.18 N., R.17 E., Nevada County, CA, Hydrologic Unit 16050102, in control house at Boca Dam, on Little Truckee River, 1,800 ft upstream from mouth, and 6.3 mi northeast of Truckee.
DRAINAGE AREA - 172 mi².
REVISIONS HISTORY - WSP 1634: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD - December 1938 to current year. Prior to October 1976 published as "at Boca." Monthend contents only for December 1938 to September 1957, published in WSP 1734.
GAGE - Water-stage recorder. Datum of gage is NGVD of 1929 and 3.90 ft above NAVD of 1988.
REMARKS - Reservoir is formed by earth-fill, rock-faced dam. Contents based on capacity table dated November 1970. Storage began Dec. 8, 1938. Usable capacity, 40,868 acre-ft, between elevations 5,521 ft, outlet sill, and 5,605 ft, top of spillway gates. Elevation of spillway (gate open) is 5,589.01 ft. Dead contents, 241 acre-ft. Figures given, including extremes, represent usable contents at 2400 hours. Water is used for irrigation in the State of Nevada and for power development. See schematic diagram of Truckee River Basin available from the California Water Science Center.
EXTREMES FOR PERIOD OF RECORD - Maximum contents, 41,440 acre-ft, Dec. 23, 1955, elevation, 5,605.55 ft; minimum, 37 acre-ft, Mar. 4-9, 1955, elevation, 5,521.65 ft.
