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LOCATION.-- Lat 40°29'24", long 90°20'25" (NAD of 1927), in SE1/4NW1/4 sec.24, T.6 N., R.1 E., Fulton County, Hydrologic Unit 07130005, on left bank at downstream side of State Highway 95 bridge, 0.5 mi upstream from a railroad bridge, 0.5 mi northeast of Seville, 0.1 mi downstream from Shaw Creek, and at mile 39.2. |
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DRAINAGE AREA.-- 1,636 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: July 1914 to current year. Monthly discharge only for some periods, published in WSP 1308. |
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STAGE: Water years 1994 to current year. |
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SURFACE-WATER QUALITY |
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CHEMICAL: Water years 1978-93. |
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SEDIMENT: Water years 1980-97, Feb. 2003 to current year. |
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MISCELLANEOUS: Sediment concentration and particle size, water years 1993, 1995-97, 2003. |
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REVISED RECORDS.-- WSP 1208: 1917, 1920, 1922, 1924, 1926-27, 1929(M). WSP 1308: 1919(M), 1936(M), 1938(M), 1942(M), 1945(M). WDR IL-75-1: Drainage area. |
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GAGE.-- Water-stage recorder, U.S. Army Corps of Engineers satellite telemeter, sediment sampler, and crest-stage gage. Datum of gage is 467.04 ft above NGVD of 1929. Datum of gage was incorrectly published water years 1927-1941. Prior to May 9, 1935, nonrecording gage 0.5 miles downstream at same datum. May 9, 1935 to June 30, 1976, nonrecording gage 0.47 miles downstream at same datum. July 1, 1976, to July 13, 1983, recording gage at present site and datum. July 14, 1983 to Sept. 18, 2000, recording gage 0.47 miles downstream at same datum. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 37,300 ft3/s, Aug. 22, 1924, gage height, 30.77 ft, from graph based on gage readings; maximum gage height, 33.10 ft, July 26, 1993, discharge, 34,700 ft3/s; minimum observed discharge, 3.8 ft3/s, July 31, Aug. 27-29, 1914. |
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SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily, 4,630 mg/L, July 21, 1996; minimum daily, 10 mg/L, Feb. 5, 6, 1996. |
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SUSPENDED-SEDIMENT LOADS: Maximum daily, 128,000 tons, May 27, 1996; minimum daily, 2.9 tons, Feb. 6, 1996. |
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EXTREMES OUTSIDE PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Flood of 1883 reached a stage of about 33.0 ft, backwater from ice, discharge not determined. |
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Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |