LOCATION.-- Lat 42°15'31", long 89°04'44" (NAD of 1983), in NE1/4SE1/4 sec.26, T.44N., R.1 E., Winnebago County, Hydrologic Unit 07090005, on right bank at upstream side of Eighth Street bridge, 0.8 mi southeast of Rockford City Hall and at mile 1.2.

DRAINAGE AREA.-- 13.4 mi².

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE

DISCHARGE: October 1979 to September 1986. Seven-month period (March to September), water years 1987-88.

GAGE.-- Water-stage recorder and crest-stage gage. Datum of gage is 713.71 ft above NGVD of 1929 (713.52 ft NAVD 1988). Prior to Feb. 26, 1980, nonrecording gage at same site and datum.

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 1,600 ft³/s, Sept. 1, 1981, gage height, 10.48 ft; minimum daily, 0.23 ft³/s, July 25, 1980.