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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
05594450 SILVER CREEK NEAR TROY, IL
LOCATION - Lat 38°42'59", long 89°49'45" referenced to North American Datum of 1983, in SE 1/4 SW 1/4 sec.12, T.3 N., R.7 W., Madison County, IL, Hydrologic Unit 07140204, on upstream side of bridge on U.S. Highway 40, 0.2 mi upstream from railroad bridge, 1.9 mi upstream from East Fork Silver Creek, 1.9 mi southeast of Troy, and at mile 44.6.
DRAINAGE AREA - 154 mi². (measured on USGS topographic maps).
REVISIONS HISTORY - WDR IL-75-1: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD -
SURFACE-WATER DISCHARGE AND STAGE
DISCHARGE: October 1966 to current.
STAGE: Water years 1994 to current.
SURFACE-WATER QUALITY
CHEMICAL: Water years 1978-91.
SURFACE-WATER DISCHARGE AND STAGE
DISCHARGE: October 1966 to current.
STAGE: Water years 1994 to current.
SURFACE-WATER QUALITY
CHEMICAL: Water years 1978-91.
GAGE - Water-stage recorder, satellite telemeter, and crest-stage gage. Datum of gage is 438.56 ft above North American Vertical Datum of 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, 14,700 ft³/s, Dec. 27, 2015, gage height, 20.32 ft; minimum daily discharge, -0.79 ft³/s, estimated, due to pumpage, Oct. 14, 2015.
