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LOCATION.-- Lat 40°37'48", long 87°43'26" (NAD of 1927), in NW1/4NE1/4 sec.16, T.25 N., R.12 W., Iroquois County, Hydrologic Unit 07120002, on pier at downstream side of bridge on County Highway 9,200 ft downstream from Mud Creek, 1 mi west of Milford, and at mile 23.9. |
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DRAINAGE AREA.-- 446 mi2. |
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PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE |
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DISCHARGE: July 1948 to current year. |
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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 1978-91, and 1999 to current year. |
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MISCELLANEOUS: Contaminants in streambed sediments, August 1999; contaminants in fish tissue, August 1999. |
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BIOLOGICAL |
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ALGAE: Water years 2002-03. |
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BENTHIC MACROINVERTEBRATES: Water years 1999 and 2002. |
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FISH: Water years 1999 and 2002-04. |
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HABITAT: Water years 1999 and 2002-04. |
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REVISED RECORDS.-- WDR IL-75-1: Drainage area. |
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GAGE.-- Water-stage recorder and phone telemeter. Datum of gage is 622.00 ft above NGVD of 1929. Prior to July 23, 1970, nonrecording gage at same site and datum. |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 22,900 ft3/s, Feb. 21, 1951, gage height, 20.90 ft, from rating curve extended above 8,200 ft3/s; maximum gage height, 28.16 ft, Apr. 12, 1994, discharge, 19,400 ft3/s; minimum discharge, 2.0 ft3/s, Sept. 1, 2, 7, 1972, Oct. 8, 1994. |
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REMARKS FOR CURRENT YEAR.-- Physical and geomorphic habitat data were collected as part of the National Water-Quality Assessment (NAWQA) program in the upper Illinois River Basin. The data were collected according to Fitzpatrick and others, 1998. Reach A begins 512 ft. upstream of a Bridge 1100N, and continues downstream 820 ft. |
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The following links list up to five tab-delimited text files containing habitat data collected at this site. An explanation of column headers in these files can be accessed at this link.
Reach -- General description of the sampled reach.
Geomorphic Channel Unit (GCU) -- Fluvial geomorphic descriptors of channel shape and stream velocity (for example pool, riffle, or run).
Transect -- Channel and bank measurements made along transects (cross sections) within each reach.
Channel features -- Measurements of bars, shelves, and islands at each transect (cross section).
Transect Points -- Channel and substrate measurements and observations at points along a transect (cross section).
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Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |