LOCATION.-- Lat 42°15'57", long 88°36'29" (NAD of 1927), in SW1/4NW1/4 sec.25, T.44 N., R.5 E., McHenry County, Hydrologic Unit 07090006, at bridge on State Highway 23, 0.7 mi north of Marengo, and at mile 38.10. | |
DRAINAGE AREA.-- 170 mi2. | |
PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE | |
PARTIAL RECORD: Annual maximum, water years 1970 to 1979. | |
GAGE.-- Crest-stage gage. Datum of gage is 794.36 ft above NGVD of 1929. | |
EXTREMES FOR PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 7350 ft3/sec, September 18, 1972, gage height, 4.87 ft. | |