USGS Water-Year Summary 2023
05595765 BIG MUDDY SUBIMPOUNDMENT NEAR WALTONVILLE, IL
LOCATION - Lat 38°10'34", long 89°00'23" referenced to North American Datum of 1983, in SE 1/4 NE 1/4 sec.17, T.4 S., R.2 E., Jefferson County, IL, Hydrologic Unit 07140106, at west end of Subimpoundment dam, about 2.5 miles south of State Highway 148, 2.5 miles southeast of Waltonville and about 10 miles upstream from Rend Lake Dam.
DRAINAGE AREA - 217 mi².
SURFACE-WATER RECORDS
PERIOD OF RECORD -
STAGE: November 1983 to current.
GAGE - Water-stage recorder, U.S. Army Corps of Engineers satellite
telemeter, and crest-stage gage. Datum of gage is 399.67 ft above NAVD of 1988.
EXTREMES FOR PERIOD OF RECORD -
STAGE: Maximum gage height, 14.46 ft, Nov. 15, 1993; minimum, 4.07 ft, Jan. 12, 1990.