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LOCATION.-- Lat 42°19'14", long 88°18'46" (NAD of 1983), in NW1/4SW1/4 sec.4, T.44 N., R.8 E., McHenry County, Hydrologic Unit 07120006, on left bank at upstream side of bridge on Bull Valley Road, 2.5 mi southwest of McHenry and at mile 4.8. |
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DRAINAGE AREA.-- 15.5 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 October 1982. |
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SURFACE-WATER QUALITY |
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MISCELLANEOUS: Water year 2000; contaminants in streambed sediments, water year 2000. |
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BIOLOGICAL |
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ALGAE: Water year 2000. |
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BENTHIC MACROINVERTEBRATES: Water year 2000. |
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HABITAT: Water year 2000-01. |
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REVISED RECORDS.-- WDR IL-75-1: Drainage area. WDR IL-79-2: 1970. |
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GAGE.-- Water-stage recorder and concrete control. Datum of gage is 769.56 ft above NGVD of 1929 (769.40 ft NAVD 1988). |
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EXTREMES FOR PERIOD OF RECORD.-- |
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SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 276 ft3/s June 2, 1970, gage height. 4.87 ft; minimum, 1.6 ft3/s Dec. 25, 1948, gage height, 0.30 ft, result of freezeup. |
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Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |