LOCATION.-- Lat 42°01'01", long 88°00'03" (NAD of 1983), in NE1/4SE1/4 sec.29, T.41 N., R.11 E., Cook County, Hydrologic Unit 07120004, on right bank at upstream side of concrete dam in Busse Woods Forest Preserve, 0.1 mi northwest of Elk Grove Village and at mile 31.8.

DRAINAGE AREA.-- 51.9 mi².

PERIOD OF RECORD.--

DISCHARGE: October 2004 to current year.

STAGE: June 1992 to current year.

PARTIAL RECORD: Miscellaneous discharge measurements, Water years 2003-2004.

GAGE.-- Water-stage recorder, phone telemeter, and concrete dam. Datum of gage is 674.75 ft above NGVD of 1929 (674.47 ft NAVD 1988).

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge 799 ft³/s, January 13, 2005, gage height, 13.12 ft; maximum gage height, 14.78 ft, Feb. 21, 1997; minimum recorded gage height, 10.72 ft, Aug. 3, 1998; no flow many days.

EXTREMES OUTSIDE PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum gage height of approximately 16.0 ft was reached during the flood on Aug. 14, 1987, from information furnished by Illinois Department of Transportation.