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- Water-Year Summary reports summarize a year of hydrologic data in a printer-friendly format.
- For water years 2014 onward, choose a water year and parameter and an on-demand Water-Year Summary report will be generated.
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USGS Water-Year Summary 2024
05444000 ELKHORN CREEK NEAR PENROSE, IL
LOCATION - Lat 41°54'09.9", long 89°41'47" referenced to North American Datum of 1983, in SW 1/4 SE 1/4 sec.9, T.22 N., R.7 E., Whiteside County, IL, Hydrologic Unit 07090005, on left bank 50 ft upstream from bridge on County Road 2200 N, 2 mi northwest of Penrose, 2.2 mi downstream from Buffalo Creek, 5 mi upstream from Sugar Creek, and at mile 17.5.
DRAINAGE AREA - 146 mi².
REVISIONS HISTORY -
WSP 925: 1940. WSP 955: 1941. WSP 1175: 1941(P), 1948(P). WSP 1308: 1950(M). WDR IL-72-1: Drainage area.
SURFACE-WATER RECORDS
PERIOD OF RECORD -
SURFACE-WATER DISCHARGE AND STAGE
DISCHARGE: October 1939 to current.
STAGE: Water years 1994 to current.
SURFACE-WATER QUALITY
CHEMICAL: Water years 1979-91.
SURFACE-WATER DISCHARGE AND STAGE
DISCHARGE: October 1939 to current.
STAGE: Water years 1994 to current.
SURFACE-WATER QUALITY
CHEMICAL: Water years 1979-91.
GAGE -
Water-stage recorder and satellite telemeter.
Datum of gage is 657.75 ft. above NAVD of 1988. Prior to Apr. 6, 1940, nonrecording gage at same site and datum.
REMARKS - Accuracy of records is discussed in the annual Station Analysis archived at the USGS IL Water Science Center.
EXTREMES OUTSIDE PERIOD OF RECORD - SURFACE-WATER DISCHARGE AND STAGE: Flood of June 1938 reached a stage of 19.6 ft, from U.S. Army Corps of Engineers high-water mark.
EXTREMES FOR PERIOD OF RECORD - SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 7,330 ft³/s, June 4, 2002, gage height, 17.42 ft; maximum gage height, 17.75 ft, Jan. 5, 1946, discharge, 5,980 ft³/s; minimum discharge, 1.9 ft³/s, Jan. 3, 1976, result of freezeup.
