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USGS Water-Year Summary 2024
05583000 SANGAMON RIVER NEAR OAKFORD, IL
LOCATION - Lat 40°07'24.1", long 89°59'02.3" referenced to North American Datum of 1983, in NW 1/4 SE 1/4 sec.3, T.19 N., R.8 W., Mason County, IL, Hydrologic Unit 07130008, on right bank at downstream side of bridge on State Highway 97, 300 ft. upstream from a railroad bridge, 0.8 mile downstream from Crane Creek, 1.8 miles northwest of Oakford, and at mile 25.7.
DRAINAGE AREA - 5,093 mi².
REVISIONS HISTORY - WSP 715: 1922(M). WSP 1175: 1912(M). WDR IL-75-1: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD -
SURFACE-WATER DISCHARGE AND STAGE
DISCHARGE: October 1909 to March 1912, August 1914 to June 1919, March 1921
to September 1922, October 1928 to December 1933, October 1939 to current.
Monthly discharge only for some periods, published in WSP 1308.
STAGE: Water years 1994 to current.
PARTIAL RECORD: Annual maximum, water years 1926 to 1928; 1934 to 1939.
SURFACE-WATER QUALITY
CHEMICAL: Water years 1978-94 and 1997-98.
SEDIMENT: Water years 1981, June 1983 to September 1986, water years 1995-1997.
SPECIFIC CONDUCTANCE: Water years 1979-81.
WATER TEMPERATURE: Water years 1976-77, 1979-81.
MISCELLANEOUS: Contaminants in streambed sediments, August 1996;
contaminants in fish tissue, August 1996; streambank sediment size,
October 1997; streambed sediment size, October 1997;
sediment concentration and particle size, water years 1993-94, 1996-98.
BIOLOGICAL
ALGAE: Water year 1981, 1996-97.
BENTHIC MACROINVERTEBRATES: Water year 1996.
FISH: Water year 1997.
HABITAT: Water years 1996 and 2003.
SURFACE-WATER DISCHARGE AND STAGE
DISCHARGE: October 1909 to March 1912, August 1914 to June 1919, March 1921
to September 1922, October 1928 to December 1933, October 1939 to current.
Monthly discharge only for some periods, published in WSP 1308.
STAGE: Water years 1994 to current.
PARTIAL RECORD: Annual maximum, water years 1926 to 1928; 1934 to 1939.
SURFACE-WATER QUALITY
CHEMICAL: Water years 1978-94 and 1997-98.
SEDIMENT: Water years 1981, June 1983 to September 1986, water years 1995-1997.
SPECIFIC CONDUCTANCE: Water years 1979-81.
WATER TEMPERATURE: Water years 1976-77, 1979-81.
MISCELLANEOUS: Contaminants in streambed sediments, August 1996;
contaminants in fish tissue, August 1996; streambank sediment size,
October 1997; streambed sediment size, October 1997;
sediment concentration and particle size, water years 1993-94, 1996-98.
BIOLOGICAL
ALGAE: Water year 1981, 1996-97.
BENTHIC MACROINVERTEBRATES: Water year 1996.
FISH: Water year 1997.
HABITAT: Water years 1996 and 2003.
GAGE - Water-stage recorder, U.S. Army Corps of Engineers satellite telemeter, and artificial control. Datum of gage is 452.50 ft above NAVD of 1988. Prior to Oct. 1, 1939, nonrecording gage at site 2.4 mi upstream at datum 458.66 ft above NGVD of 1929 (458.33 ft NAVD 1988). Oct. 1, 1939, to May 14, 1940, nonrecording gage at present site at zero datum of NGVD of 1929 (-0.33 ft NAVD 1988).
REMARKS - Accuracy of records is discussed in the annual Station Analysis archived at the USGS IL Water Science Center.
EXTREMES FOR PERIOD OF RECORD -
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 123,000 ft³/s, May 20, 1943, gage height, 25.63 ft; minimum daily, 45 ft³/s, estimated, Jan. 21-31, 1918.
SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily, 3,540 mg/L, June 9, 1984; minimum daily, 1 mg/L, Dec. 7, 8, 1996, Jan. 11, 1997.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 120,000 tons, Feb. 24, 1985; minimum daily, 1.6 tons, Dec. 7, 1996.
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 123,000 ft³/s, May 20, 1943, gage height, 25.63 ft; minimum daily, 45 ft³/s, estimated, Jan. 21-31, 1918.
SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily, 3,540 mg/L, June 9, 1984; minimum daily, 1 mg/L, Dec. 7, 8, 1996, Jan. 11, 1997.
SUSPENDED-SEDIMENT LOADS: Maximum daily, 120,000 tons, Feb. 24, 1985; minimum daily, 1.6 tons, Dec. 7, 1996.
