USGS Water-Year Summary 2024

06639000 SWEETWATER RIVER NEAR ALCOVA, WY

LOCATION - Lat 42°29'24", long 107°08'00" referenced to North American Datum of 1927, in SE 1/4 NE 1/4 NE 1/4 sec.16, T.29 N., R.86 W., Natrona County, WY, Hydrologic Unit 10180006, on left bank 270 ft upstream from State Highway 220, 0.2 mi southwest of Independence Rock, 7 mi upstream from high-water line of Pathfinder Reservoir at elevation 5,850 ft, and 22 mi southwest of Alcova.

DRAINAGE AREA - 2,338 mi² of which 93 mi² probably is noncontributing.

REVISIONS HISTORY - WSP 1310: 1921, 1923-24. WSP 1710: Drainage area.

SURFACE-WATER RECORDS

PERIOD OF RECORD - August 1913 to September 1924, October 1938 to October 2018 (no winter records during 1974, 1975, 1977-81, and since 1983). Monthly discharge only for some periods, published in WSP 1310.

GAGE - Water-stage recorder and sharp-crested weir. Elevation of gage is 5,890 ft above NGVD of 1929, from topographic map. August 28, 1913 to September 30, 1924, nonrecording gages at site 7.0 mi upstream from station at different datums. October 1, 1938 to March 31, 1992, at site 6.6 mi upstream from station at different datum. Wyoming State Engineer's Office data collection platform with satellite telemetry at station.

COOPERATION - Station operated and record provided by the Wyoming State Engineer's Office; record reviewed by U.S. Geological Survey.

REMARKS -

Several small reservoirs upstream from station, combined capacity, about 5,000 acre-ft, for 
irrigation. Diversions for irrigation upstream from station.  

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 4,290 ft³/s, April 13, 1924, gage height, 8.36 ft; maximum gage height, 9.90 ft, April 27, 1983; minimum daily discharge, 0.50 ft³/s, July 30, 1940.

WATER-QUALITY RECORDS

PERIOD OF RECORD - Water years 1966-90, October 2003 to current.