USGS Water-Year Summary for Site 11413515

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	00054 Reservoir storage(Obs.)

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Water year 2023: 2022-10-01 to 2023-09-30

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USGS Water-Year Summary 2023

11413515 New Bullards Bar Reservoir near North San Juan, CA

LOCATION - Lat 39°23'34", long 121°08'25" referenced to North American Datum of 1927, in SE 1/4 NW 1/4 sec.25, T.18 N., R.7 E., Yuba County, CA, Hydrologic Unit 18020125, in Plumas National Forest, in center of dam on North Yuba River, 2.2 mi upstream from Middle Yuba River, and 2.4 mi northwest of North San Juan.

DRAINAGE AREA - 489 mi².

REVISIONS HISTORY - WDR US-2008: 2007 (month end elevation, change in contents).

SURFACE-WATER RECORDS

PERIOD OF RECORD - January 1969 to current year.

GAGE - Water-stage recorder. Datum of gage is NGVD of 1929 (levels by Yuba County Water Agency).

COOPERATION - Records provided by Yuba County Water Agency, under general supervision of the U.S. Geological Survey, in connection with Federal Energy Regulatory Commission project no. 2246. Contents not rounded to U.S. Geological Survey standards.

REMARKS - Reservoir is formed by concrete-arch dam with a concrete-sidehill spillway. Spill controlled by three 30-ft by 53-ft radial gates. Storage began in January 1969. Usable capacity, 727,380 acre-ft, between elevations 1,732.0 ft, minimum power pool and 1,955.0 ft, normal gross pool. Dead storage, 233,920 acre-ft. Total capacity at normal gross pool, 961,300 acre-ft, elevation, 1,955.0 ft. Water is released to New Colgate Powerplant (station 11413510) through a tunnel at the dam. Water is diverted into the reservoir from Middle Yuba River via Lohman Ridge Tunnel to Oregon Creek then via Camptonville Tunnel (stations 11408870 and 11413510). Records, excluding extremes, represent total contents at 2400 hours. Contents based on capacity table 2. See schematic diagram of North and Middle Yuba River Basins available from the California Water Science Center.

EXTREMES FOR PERIOD OF RECORD - Prior to Oct. 1, 2008, maximum contents at 2400 hours, 972,224 acre-ft, June 27, 1995, elevation, 1,957.27 ft. Since Oct. 1, 2008, maximum contents, 963,327 acre-ft, June 25, 2011, elevation, 1,955.40 ft. Minimum since reservoir first filled, 178,230 acre-ft, Dec. 29, 1980, elevation, 1,700.00 ft.