USGS Water-Year Summary 2019
05448000 MILL CREEK AT MILAN, IL
LOCATION - Lat 41°26'32", long 90°33'21" referenced to North American Datum of 1927, in NW 1/4 NE 1/4 sec.25, T.17 N., R.2 W., Rock Island County, IL, Hydrologic Unit 07090005, on upstream side of Knoxville Road Bridge, 1 mi southeast of Milan, and at river mile 1.2.
DRAINAGE AREA - 62.4 mi².
- WSP 1308: 1940(M), 1943(M). WDR IL-72-1: Drainage area.
PERIOD OF RECORD -
SURFACE-WATER DISCHARGE AND STAGE
DISCHARGE: October 1939 to September 1940 (fragmentary), July 1941 to September 1986.
Seven-month period (March to September), water years 1987-89. March 1989 to January
2009, September 2009 to current.
STAGE: October 1998 to January 2009, September 2009 to current.
PARTIAL RECORD: Miscellaneous discharge measurement, water year 2009.
GAGE - Water-stage recorder and satellite telemeter. Datum of gage is 565.23 ft above NGVD of 1929 (levels by U.S. Army Corps of Engineers) (565.01 ft NAVD 1988). Prior to Oct. 1, 1987, at datum 1.00 ft higher. Prior to Apr. 5, 1940, non-recording gage at site 300 ft upstream. Oct. 1939 to Nov. 15, 1984, recording gage at site 400 ft. upstream.
EXTREMES OUTSIDE PERIOD OF RECORD - SURFACE-WATER DISCHARGE AND STAGE: Flood of June 1936 reached a stage of 7.4 ft, from information by local residents, and an estimated discharge of 4,500 ft³/s.
EXTREMES FOR PERIOD OF RECORD - SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 9,300 ft³/s, April 22, 1973, gage height, 12.65 ft, present datum; maximum gage-height, 15.52 ft, March 2, 2008, ice jam, estimated discharge 2,200 ft³/s; no flow at times in several years.