USGS Water-Year Summary 2023
05579500 LAKE FORK NEAR CORNLAND, IL
LOCATION - Lat 39°57'06.36", long 89°23'08.41" referenced to North American Datum of 1983, in SE 1/4 NE 1/4 SE 1/4 sec.2, T.17 N., R.3 W., Logan County, IL, Hydrologic Unit 07130009, on downstream guardrail of 1100E Road bridge, 0.1 mi downstream from State Highway 54 bridge, 2.0 mi northeast of Cornland, 8 mi downstream from Jones Fork, and at mile 12.8.
DRAINAGE AREA - 214 mi².
- WDR IL-75-1: Drainage area.
PERIOD OF RECORD -
SURFACE-WATER DISCHARGE AND STAGE
DISCHARGE: January 1948 to current.
STAGE: Water years 1994 to current.
CHEMICAL: Water years 1978-91.
GAGE - Water-stage recorder, satellite telemeter, and crest-stage gage. Datum of gage is 554.73 ft above NAVD of 1988. Prior to Sept. 6, 1973, nonrecording gage at same site and datum. Sept. 6, 1973 to Apr. 10, 2010, located at State Highway 54 bridge, 0.1 mi. upstream at same datum.
EXTREMES OUTSIDE PERIOD OF RECORD -
SURFACE-WATER DISCHARGE AND STAGE: Flood in May 1943 reached a stage of 23.4 ft, from floodmarks, discharge 29,000 ft³/s, by contracted-opening measurement of peak flow.
EXTREMES FOR PERIOD OF RECORD -
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 8,930 ft³/s, Apr. 12, 1979, gage height, 23.11 ft; minimum, 0.20 ft³/s, Aug. 30, 2012, result of regulation.