LOCATION.-- Lat 41°43'29", long 87°31'31" (NAD of 1927), in SE1/4SE1/4 sec.5, T.37 N., R.15 E., Cook County, Hydrologic Unit 04060200, at the Calumet Harbor Disposal Facility in Chicago.

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE

STAGE: June 1983 to current.

GAGE.-- Water-stage recorder. Datum of gage is 00.00 ft, Lake Michigan datum (Low-water datum), based on International Great Lakes Datum of 1955, (the gage datum is 576.781 ft).

EXTREMES FOR PERIOD OF RECORD.--

STAGE: Maximum gage height, 5.68 ft, Oct. 4, 1986; minimum, -1.11 ft, Mar. 3, 2001.