LOCATION.-- Lat 42°19'15", long 88°18'45" (NAD of 1927), 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. | |
DRAINAGE AREA.-- 15.5 mi2. | |
PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE | |
DISCHARGE: July 1948 to October 1982. | |
SURFACE-WATER QUALITY | |
MISCELLANEOUS: Water year 2000; contaminants in streambed sediments, water year 2000. | |
BIOLOGICAL | |
ALGAE: Pigment and biomass, Water year 2000. | |
BENTHIC MACROINVERTEBRATES: Water year 2000. | |
HABITAT: Water year 2000. | |
REVISED RECORDS.-- WDR IL-75-1: Drainage area. WDR IL-79-2: 1970. | |
GAGE.-- Water-stage recorder and concrete control. Datum of gage is 769.56 ft above NGVD of 1929. | |
EXTREMES FOR PERIOD OF RECORD.-- | |
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. | |