LOCATION.-- Lat 42°12'40", long 88°10'25" (NAD of 1983), in NE1/4NW1/4 sec.15, T.43 N., R.9 E., Lake County, Hydrologic Unit 07120006, on left bank at upstream side of bridge on Kelsey Road, 2.5 mi northeast of Fox River Grove, and at mile 1.1.

DRAINAGE AREA.-- 37.0 mi².

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE

DISCHARGE: October 1989 to September 1996.

STAGE: Water years 1994-1996.

PARTIAL RECORD: Annual maximum, water years 1962 to 1976; Miscellaneous discharge measurements, water year 2000.

SURFACE-WATER QUALITY

MISCELLANEOUS: Water year 2000; contaminants in streambed sediments, water year 2000.

BIOLOGICAL

ALGAE: Water year 2000.

BENTHIC MACROINVERTEBRATES: Water year 2000.

FISH: Water year 2001.

HABITAT: Water year 2000-01.

REVISED RECORDS.-- WDR IL-77-1: 1972-76(M).

GAGE.-- Water-stage recorder and crest-stage gage. Datum of gage is 738.00 ft above NGVD of 1929 (737.79 ft NAVD 1988). Prior to Oct. 1, 1989, crest-stage gage at datum 3.44 ft higher.

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 690 ft³/s, May 21, 1996, gage height, 5.88 ft; minimum discharge, 1.1 ft³/s, Sept. 19-21, Oct. 30,31, 1994.

EXTREMES OUTSIDE PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Flood of April 1960 reached a stage of 6.36 ft, present datum, discharge, 492 ft³/s.

REMARKS FOR CURRENT YEAR.--Fish community samples were collected as part of the National Water-Quality Assessment program (NAWQA) in the upper Illinois River Basin. Taxonomy is based on Robins and others (1991), except where modified for the family Moronidae (Johnson, 1984) and the order Cyprinidontiformes (Parenti, 1981). Collections were made with a single pass of the entire reach with a barge or a backpack electroshocker with supplementary seine hauls and kicks. Fishes were identified by C. A. Taylor, Illinois Natural History Survey, Champaign. Reach A begins 47 feet upstream of Kelsey Road and continues upstream for 492 feet.