USGS Water-Year Summary for Site 06386500

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	Available Parameters
	00060 Discharge(Mean)
	00065 Gage height(Mean)

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

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USGS Water-Year Summary 2023

06386500 CHEYENNE RIVER NEAR SPENCER, WY

LOCATION - Lat 43°25'16", long 104°07'52" referenced to North American Datum of 1927, in NE 1/4 NW 1/4 NE 1/4 sec.25, T.40 N., R.61 W., Niobrara County, WY, Hydrologic Unit 10120106, on right bank at downstream side of old highway bridge, 0.1 mi downstream from Sage Creek, 1.8 mi downstream from Robbers Roost Creek, and 17.0 mi northwest of Edgemont, SD.

DRAINAGE AREA - 5,323 mi² of which 1 mi² probably is noncontributing.

REVISIONS HISTORY - WDR SD-10-1: Drainage area.

SURFACE-WATER RECORDS

PERIOD OF RECORD - October 1948 to September 1974, October 2003 to October 2017, March 2020 to current year (seasonal records only). Published as South Fork Cheyenne River near Spencer October 1949 to September 1951.

GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 3581.76 ft above NAVD88. Prior to Oct. 18, 1955, water-stage recorder at site 400 ft upstream. Oct. 18, 1955, to Aug. 1, 1961, at site 2,500 ft upstream, Aug. 1, 1961, to Aug. 22, 1962, at site 2,200 ft upstream.

REMARKS - For Accuracy of records for water years prior to 2014 are noted in the individual Annual Data Reports for those water years. For water years 2014 onward, records good except for estimated discharges, which are poor. Many small reservoirs above station used for stock and irrigation water, total capacity, about 45,000 acre-ft. Satellite data-collection platform at station. Station operated by the Wyoming Water Science Center from October 1948 to September 1974.

EXTREMES FOR PERIOD OF RECORD - Maximum discharge, 16,000 ft³/s, May 27, 1962, gage height, 13.74 ft, site then in use; minimum daily discharge, 0.00 ft³/s, Oct. 4, 1948, no flow at times in most years.

WATER-QUALITY RECORDS

PERIOD OF RECORD - Chemical analysis: Water years 1951-54, 1969-70, and 1972-79, 2005-present. Sediment records: Periodic samples taken May 1971 to July 1974, March 2004 to August 2012.

PERIOD OF DAILY RECORD - SPECIFIC CONDUCTANCE: March 2004 to August 2012 (seasonal, discontinued). pH: March 2004 to August 2012 (seasonal, discontinued). WATER TEMPERATURE: March 2004 to August 2012 (seasonal, discontinued). DISSOLVED OXYGEN: March 2004 to August 2012 (seasonal, discontinued). TURBIDITY: March 2004 to August 2012 (seasonal, discontinued).