LOCATION.-- Lat 42°15'31", long 89°04'44" (NAD of 1927), 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. 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.