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Water-Year Summary for Site 06406000

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  • Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
  • For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
  • For water years 2006 through 2013, choose a water year and an Annual Water Data Report will be provided.
  • For water years 2005 and earlier, Annual Water Data Reports may be available in digital format.
  • Not all sites have reports available for every water year.
Available Parameters
00060 Discharge(Mean)  
00065 Gage height(Mean)  

Water year 2021: 2021-10-01 to 2022-09-30

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USGS Water-Year Summary 2021
LOCATION - Lat 43°49'41", long 103°11'44" referenced to North American Datum of 1927, in NE 1/4 SW 1/4 SW 1/4 sec.32, T.2 S., R.8 E., Custer County, SD, Hydrologic Unit 10120109, on right bank 50 ft downstream from Chicago and North Western Transportation Company bridge, 0.8 mi south of Hermosa, and 2.9 mi downstream from Grace Coolidge Creek.
DRAINAGE AREA - 169 mi².
REVISIONS HISTORY - WDR SD-10-1: Drainage area. Discharge for the period Nov. 27, 2018, to Jan. 31, 2019, was revised on Feb. 18, 2020, based on changes to the shifted stage-discharge rating.
PERIOD OF RECORD - Aug. to Dec. 1903 (gage heights only), July 1949 to current year.
GAGE - Water-stage recorder and crest-stage gage. Elevation of gage is 3,290 ft above NGVD of 1929, from topographic map. Nonrecording gage, Aug. to Dec. 1903, at site 50 ft upstream, July 7, 1949, to Nov. 2, 1950, at site 0.5 mi upstream, Nov. 3, 1950, to Dec. 6, 1961, at site 170 ft downstream, all at different datum. Dec. 7, 1961, to June 10, 1972, water-stage recorder (destroyed by flood), and June 11, 1972, to Aug. 28, 1972, nonrecording gage at site 80 ft downstream at present datum.
REMARKS - 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  June 9, 2015 to July 31, 2015, May 24-27, 2016, May 30, 2016 to Jun. 7, 2016, and Jul 24, 2016 to Aug. 18, 2016 which are fair, and estimated discharges, which are poor. Satellite data-collection platform at station.
EXTREMES FOR PERIOD OF RECORD - Maximum discharge 21,400 ft³/s, from rating curve extended above 2,800 ft³/s, on basis of contracted opening and flow-over railroad embankment measurement of peak flow; June 10, 1972, gage height, 17.72 ft, from floodmark; minimum daily discharge, 0.00 ft³/s, Oct. 6, 1954, no flow at times in 1954-57, 1959, and 1989.