LOCATION.-- Lat 41°53'18", long 87°36'27" (NAD of 1927), in NE1/4 SE1/4 sec.10, T.39 N., R.14 E., Cook County, Hydrologic Unit 04060200, on the lakeside of the downstream left guidewall, approximately 75 ft west of the riverside gates of the Chicago Lock. | |
DRAINAGE AREA.-- Indeterminate. | |
PERIOD OF RECORD.-- | |
STAGE: August 1997 to September 2003. | |
GAGE.-- Water-stage recorder and phone telemeter. Datum of gage is 579.48 ft above NGVD of 1929 (Chicago City Datum). | |
REMARKS.-- Gage provides stage data to determine Illinois' diversion of Lake Michigan water. | |
EXTREMES FOR PERIOD OF RECORD.-- | |
STAGE: Maximum gage height, 3.84 ft, May 31, 1998; minimum, -3.79 ft., Feb 11, 2002, exaggerated due to wave action. | |