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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.
USGS Water-Year Summary 2024
05573540 SANGAMON RIVER AT ROUTE 48 AT DECATUR, IL
LOCATION - Lat 39°49'52", long 88°58'35" referenced to North American Datum of 1983, in NE 1/4 NE 1/4 sec.21, T.16 N., R.2 E., Macon County, IL, Hydrologic Unit 07130006, on right upstream side of bridge on State Highway 48 in Decatur, 1.2 mi downstream from Lake Decatur Dam, 2.5 mi upstream from Stevens Creek, and at mile 129.0.
DRAINAGE AREA - 938 mi².
REVISIONS HISTORY - WDR IL-94-2: 1992, WDR-US-2012: 2002(M).
SURFACE-WATER RECORDS
PERIOD OF RECORD -
SURFACE-WATER DISCHARGE AND STAGE
DISCHARGE: October 1982 to current.
STAGE: Water years 1994 to current.
SURFACE-WATER QUALITY
CHEMICAL: Water years 1979-91.
SURFACE-WATER DISCHARGE AND STAGE
DISCHARGE: October 1982 to current.
STAGE: Water years 1994 to current.
SURFACE-WATER QUALITY
CHEMICAL: Water years 1979-91.
GAGE - Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 583.17 ft NAVD 1988.
REMARKS - Flow regulated by Lake Decatur Dam, 1.2 mi upstream.
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, 21,500 ft³/s, Sept. 14, 2008, gage height, 24.43 ft; no flow in some years.
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 21,500 ft³/s, Sept. 14, 2008, gage height, 24.43 ft; no flow in some years.
