USGS Water-Year Summary for Site 06441500

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	Available Parameters
	00060 Discharge(Mean)
	00065 Gage height(Mean)
	80154 Suspnd sedmnt conc(Mean)
	80154 Suspnd sedmnt conc(Mean) [(2)]
	80155 Suspnd sedmnt disch(Sum)

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

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USGS Water-Year Summary 2021

06441500 BAD RIVER NEAR FORT PIERRE, SD

LOCATION - Lat 44°19'36", long 100°23'02" referenced to North American Datum of 1927, in NW 1/4 NW 1/4 sec.10, T.4 N., R.31 E., Stanley County, SD, Hydrologic Unit 10140102, on right bank at downstream side of highway bridge, 2.1 mi southwest of Fort Pierre, 4.3 mi downstream from Willow Creek, and 6.0 mi upstream from mouth.

DRAINAGE AREA - 3,147 mi².

REVISIONS HISTORY - WSP 856: 1929(M), 1937. WDR SD-10-1: Drainage area. WDR SD-81-1: 1979-80.

SURFACE-WATER RECORDS

PERIOD OF RECORD - August 1928 to current year. Monthly discharge only for July 1932 to February 1934, published in WSP 1309.

GAGE - Water-stage recorder and crest-stage gage. Datum of gage is 1,429.08 ft above NAVD88. Datum was converted to NAVD88 datum using the National Geodetic Surveys VDATUM transformation tool. Prior to conversion to NAVD88 on Oct. 1, 2019 datum was published as 1,427.83 ft above NGVD29. Prior to July 10, 1951, nonrecording gage at same site and 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 those for Oct. 1, 2013 to Dec. 3, 2013 and Mar. 12, 2015 to Sept. 30, 2015, which are fair and those for estimated discharges, which are poor. Satellite data-collection platform at station. Suspended sediment samples collected with each discharge measurement.

EXTREMES OUTSIDE PERIOD OF RECORD - Flood in April 1927 reached a stage of 30.89 ft, (from floodmarks); discharge, about 55,000 ft³/s. Flood in July 1905 reached a stage about 2 ft higher than that in April 1927.

EXTREMES FOR PERIOD OF RECORD - Minimum daily discharge, 0.00 ft³/s, Oct. 1, 1928, no flow for many days in most years.

WATER-QUALITY RECORDS

PERIOD OF RECORD - October 1945 to September 1953, October 1971 to current year.

PERIOD OF DAILY RECORD - SUSPENDED-SEDIMENT DISCHARGE: October 1971 to current year. WATER TEMPERATURE: October 1972 to June 1983.

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, sediment discharge records fair except for Oct. 1, 2013 to Sept. 30, 2015, which are poor. Observer or technician collect samples on a daily basis during most periods of moderate and higher open-water flows. Size analyses for suspended-sediment samples collected for low flows may be affected by dissolved solids. Sediment-discharge records prior to Oct. 1, 1971, on file in the District office, U.S. Army Corps of Engineers, Omaha, NE.

EXTREMES FOR PERIOD OF DAILY RECORD - SEDIMENT CONCENTRATION: Maximum daily mean, 124,000 mg/L, July 17, 1981; minimum daily mean, 0 mg/L, estimated, on many days most years. SEDIMENT LOAD: Maximum daily, 949,000 tons, May 14, 1982; minimum daily, 0 ton on many days most years.