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LOCATION.-- Lat 42°18'36", long 88°15'05" (NAD of 1927), in NW1/4 sec.12, T.44 N., R.8 E., McHenry County, Hydrologic Unit 07120006, on right bank of main channel, 300 ft upstream from Stratton Lock and Dam, 2.5 mi downstream from McHenry, and at mile 97.8. |
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DRAINAGE AREA.-- 1,250 mi2. |
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PERIOD OF RECORD.-- |
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STAGE: June 1941 to current year. |
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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 733.00 ft above NGVD of 1929 (levels by Illinois Department of Transportation). Prior to Oct. 1, 1971, at datum 2.07 ft higher. |
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REMARKS.-- Stage regulated by Stratton Lock and Dam (previously known as McHenry Dam). |
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EXTREMES FOR PERIOD OF RECORD.-- |
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STAGE: Maximum gage height, 6.36 ft, present datum, Apr. 5, 1960; minimum, 0.32 ft, present datum, Feb. 6, 1967. |
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Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |