LOCATION.-- Lat 42°08'18", long 87°50'04" (NAD of 1927), in SW1/4SE1/4 sec.4, T.42 N., R.12 E., Cook County, Hydrologic Unit 07120003, on left bank at upstream side of bridge on State Highway 68 at Northbrook, and at mile 7.9. | |
DRAINAGE AREA.-- 11.5 mi2. | |
PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE | |
DISCHARGE: August 1952 to current year. | |
STAGE: Water years 1994 to current year. | |
GAGE.-- Water-stage recorder, and phone telemeter. Datum of gage is 637.98 ft above NGVD of 1929 (Cook County Highway Department bench mark). | |
REMARKS.-- Effluent from sewage-treatment plant 1.7 mi upstream. | |
EXTREMES FOR PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 1,190 ft3/s, Aug. 14, 1987, gage height, 10.10 ft; no flow at times in several years. | |