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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
05595700 BIG MUDDY RIVER NEAR MT. VERNON, IL
LOCATION - Lat 38°18'35", long 88°59'18" referenced to North American Datum of 1983, in SE 1/4 NW 1/4 sec.33, T.2 S., R.2 E., Jefferson County, IL, Hydrologic Unit 07140106, on left bank at downstream side of bridge on State Highway 15, 0.5 mi downstream from Harper Creek, 4.7 mi west of Mt. Vernon, 8.9 mi downstream from Snow Creek, and at mile 133.2.
DRAINAGE AREA - 71.9 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD -
STAGE: October 1979 to current. Gage-height record for February 1965 to September 1979
available in files of U.S. Army Corps of Engineers.
SURFACE-WATER QUALITY
CHEMICAL: Water years 1978-90.
STAGE: October 1979 to current. Gage-height record for February 1965 to September 1979
available in files of U.S. Army Corps of Engineers.
SURFACE-WATER QUALITY
CHEMICAL: Water years 1978-90.
GAGE - Water-stage recorder, U.S. Army Corps of Engineers satellite telemeter, and crest-stage gage. Datum of gage is 424.64 ft above NAVD of 1988 (levels by U.S. Army Corps of Engineers).
EXTREMES FOR PERIOD OF RECORD - STAGE: Maximum gage height, 12.04 ft, Nov.14, 1993; minimum, -0.08 ft, on Oct, 7, 2023.
