USGS Water-Year Summary 2020
10312100 Lahontan Reservoir Near Fallon, NV
LOCATION - Lat 39°27'45", long 119°04'00" referenced to North American Datum of 1927, in SW 1/4 SE 1/4 sec.33, T.19 N., R.26 E., Churchill County, NV, Hydrologic Unit 16050202, in outlet control house on upstream side of Lahontan Dam on Carson River, 18 mi west of Fallon.
DRAINAGE AREA - 1,799 mi². (not including inflow from Truckee Canal).
- WDR NV-79-1: Drainage area.
PERIOD OF RECORD - Jan. 1917 to current year. Monthly contents only for Jan. 1917 to Sep. 1960, published in WSP 1734.
GAGE - Water-stage recorder since Dec. 1999 and float tape with surface contact detector. Prior to 1956, float tape. Datum of gage is Reclamation Service Datum "Lahontan Dam Datum", which is 3.73 ft higher than National Geodetic Vertical Datum of 1929.
EXTREMES FOR PERIOD OF RECORD - Maximum contents observed (20-in flashboard on weir), 328,600 acre-ft, Jun. 16, 1942, elevation, 4,164.43 ft; minimum observed, 91 acre-ft, Sep. 07-09, 1929, elevation, 4,070.0 ft.