USGS Water-Year Summary 2023
05525500 SUGAR CREEK AT MILFORD, IL
LOCATION - Lat 40°37'47.7", long 87°43'24.7" referenced to North American Datum of 1983, in NW 1/4 NE 1/4 sec.16, T.25 N., R.12 W., Iroquois County, IL, Hydrologic Unit 07120002, on pier at downstream side of bridge on County Highway 9, 200 ft. downstream from Mud Creek, 1 mile west of Milford, and at mile 23.9.
DRAINAGE AREA - 446 mi².
REVISIONS HISTORY - WDR IL-75-1: Drainage area.
Revisions: Datum of the gage was revised to 620.75 ft NAVD88 on June 6, 2023, as determined by a GNSS Level II survey. Datum was previously published in error as 622.00 ft NGVD29, water year 1984 to June 6, 2023.
SURFACE-WATER RECORDS
PERIOD OF RECORD -
SURFACE-WATER DISCHARGE AND STAGE
DISCHARGE: July 1948 to current.
STAGE: Water years 1994 to current.
SURFACE-WATER QUALITY
CHEMICAL: Water years 1978-91, 1999-2004 and 2009 to 2011.
MISCELLANEOUS: Water years 2004 and 2005; Contaminants in streambed sediments, August
1999; contaminants in fish tissue, August 1999.
BIOLOGICAL
ALGAE: Water years 1999, 2002-04.
BENTHIC MACROINVERTEBRATES: Water years 1999, 2002-04.
FISH: Water years 1999, 2002-04.
HABITAT: Water years 1999-2000, 2002-04.
GAGE - Water-stage recorder and satellite telemeter, and crest-stage gage. Datum of gage is 620.75 ft above NAVD of 1988. Water years 1970 to 1984, at same site but datum of 622.00 ft above NGVD of 1929. Prior to July 23, 1970, nonrecording gage at same site but datum of 622.00 ft above NGVD of 1929.
EXTREMES FOR PERIOD OF RECORD -
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 22,900 ft³/s, Feb. 21, 1951, gage height, 20.90 ft; maximum gage height, 28.66 ft, Jan. 8, 2008, discharge, 19,700 ft³/s; minimum discharge, 0.64 ft³/s, Aug. 29-30, 2013.