USGS Water-Year Summary 2021
05533400 SAWMILL CREEK NEAR LEMONT, IL
LOCATION - Lat 41°42'28", long 87°57'46" referenced to North American Datum of 1983, in NE 1/4 SW 1/4 sec.10, T.37 N., R.11 E., Du Page County, IL, Hydrologic Unit 07120004, on concrete abutment on right bank, 50 ft upstream from bridge on Bluff Road at south edge of Argonne National Laboratory, 2.5 mi northeast of Lemont, and at mile 1.
DRAINAGE AREA - 13 mi².
- WDR IL-76-1: Drainage area, WDR IL-77-1: 1961-76(M).
PERIOD OF RECORD -
SURFACE-WATER DISCHARGE AND STAGE
DISCHARGE: December 1985 to current.
STAGE: Water years 1994 to current.
PARTIAL RECORD: Annual maximum, water years 1961-79.
PRECIPITATION: April 1986 to current.
MISCELLANEOUS: Water year 2000; contaminants in streambed sediments, water year 2000.
ALGAE: Water year 2000.
BENTHIC MACROINVERTEBRATES: Water year 2000.
FISH: Water year 2001.
HABITAT: Water year 2000-01.
GAGE - Water-stage recorder, satelite telemeter, crest-stage gage, and an 8-in.-diameter unheated tipping-bucket rain gage. Datum of gage is 629.70 ft above NAVD of 1988. From Nov. 19, 2020 to September 30, 1976 the datum was 630.00 ft. NGVD (629.71 ft NAVD 1988). October 11, 1961, to September 30, 1976, crest-stage gage on bridge 50 ft downstream at datum 11.22 ft higher.
EXTREMES FOR PERIOD OF RECORD - SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 3,070 ft³/s, July 18,1996, gage height, 17.53 ft; no flow at times in most years.
PRECIPITATION: Maximum daily total, 6.17 in., July 17, 1996.