USGS Water-Year Summary 2024

10333000 Humboldt River Near Imlay, NV

LOCATION - Lat 40°41'33", long 118°12'12" referenced to North American Datum of 1927, in NW 1/4 SE 1/4 sec.25, T.33 N., R.33 E., Pershing County, NV, Hydrologic Unit 16040108, on right bank, 1 mi upstream from Callahan bridge, 4 mi northwest of Imlay, and at mi 75.00 above Derby Road bridge.

DRAINAGE AREA - 15,503.93 mi².

REVISIONS HISTORY - WSP 1714: Drainage area; WDR NV-99-1: Drainage area. Elevation of gage from beginning of record to 10/17/2017 was 4,130 ft and was revised on 10/17/2017, based on single-base OPUS-S level 3 survey.

SURFACE-WATER RECORDS

PERIOD OF RECORD - Jun. 1935 to Dec. 1941, Apr. 1945 to current year.

GAGE - Water-stage recorder. Elevation of gage is 4,133.2 ft above NAVD88 from Global Navigation Satellite System survey quality level 3.  Prior to Apr. 28, 1945, at site 1 mi downstream at different datum. Apr. 28, 1945, to Aug. 20, 1947, at present site at datum 1 ft higher.

REMARKS - Flow affected by many diversions above station for irrigation. 10/01/2013-09/30/2014: Records good. 10/01/2014-09/30/2015: Records good. 10/01/2015-09/30/2016: Records good. 10/01/2016-09/30/2017: Records fair except for estimated discharges, which are poor. 10/01/2017-09/30/2018: Records fair except for estimated discharges, which are poor. 10/01/2018-09/30/2019: Records fair. 10/01/2019-09/30/2020: Records fair. 10/01/2020-09/30/2021: Records good except for estimated discharges, which are poor.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 9,270 ft³/s, May 27, 1984, gage height, 13.20 ft; no flow at times, some years.