LOCATION.-- Lat 42°16'22", long 88°32'58" (NAD of 1927), in SE1/4SE1/4 sec.20, T.44 N., R.6 E., McHenry County, Hydrologic Unit 07090006, at bridge on Garden Valley Road, 2.7 mi north of Union, 3.2 mi northeast of Marengo, and at mile 0.75. | |
DRAINAGE AREA.-- 40.1 mi2. | |
PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE | |
PARTIAL RECORD: Annual maximum, water years 1970 to 1978. | |
GAGE.-- Crest-stage gage. Datum of gage is 814.13 ft above NGVD of 1929. | |
EXTREMES FOR PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 680 ft3/sec, July 2, 1978, gage height, 3.75 ft. | |