LOCATION.-- Lat 41°01'08", long 89°50'08" (NAD of 1983), in SE1/4SE1/4 sec.17, T.12 N., R.6 E., Stark County, Hydrologic Unit 07130005, on left bank at upstream side of bridge on West Jersey Road (County Road 300 N), 4.5 mi southwest of Wyoming and at mile 4.9.

DRAINAGE AREA.-- 62.7 mi².

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE

DISCHARGE: October 1959 to current year.

STAGE: Water years 1994 to current year.

SURFACE-WATER QUALITY

CHEMICAL: Water years 1978-91 and 1998.

SEDIMENT: October 1980 to September 1981.

SPECIFIC CONDUCTANCE: Water year 1981.

WATER TEMPERATURE: Water year 1981.

MISCELLANEOUS: Contaminants of streambed sediments, August 1996; contaminants of fish tissue, August 1996; streambank sediment size, October 1997; streambed sediment size, October 1997.

BIOLOGICAL

ALGAE: Water years 1996-98.

BENTHIC MACROINVERTEBRATES: Water years 1996-98.

FISH: Water years 1996-98.

HABITAT: Water years 1996-1998, 2003.

REVISED RECORDS.-- WDR IL-75-1: Drainage area.

GAGE.-- Water-stage recorder, phone telemeter, and crest-stage gage. Datum of gage is 606.78 ft above NGVD of 1929 (606.53 ft NAVD 1988). Prior to Oct. 1, 1994, at same site at datum 10.00 ft. higher.

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 6,540 ft³/s, from rating curve extended above 1,400 ft³/s, on basis of contracted-opening measurement of peak flow, June 22, 1974; gage height, 23.81 ft (present datum); no flow, Sept. 25, 26, and part of each day Oct. 7, 8, 13, 1988.

SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily mean, 11,100 mg/L Apr. 14, 1981; minimum daily mean, 20 mg/L Feb. 6-17, 1981.

SUSPENDED-SEDIMENT LOADS: Maximum daily, 31,100 tons Apr. 14, 1981; minimum daily, 0.35 ton Feb. 14, 1981.

REMARKS FOR CURRENT YEAR.--Algae community samples were collected as part of the National Water-Quality Assessment program (NAWQA) in the lower Illinois River Basin. A qualitative sample was collected in accordance with NAWQA protocols (Cuffney and others, 1993). The qualitative periphyton sample is a composite of all samples collected from all periphyton microhabitats present within the sampling reach. All samples were processed by the Philadelphia Academy of Natural Sciences. Reach A begins 607 ft upstream of the road 450 N bridge (1.95 mi upstream of the gage) and continues upstream for 568 ft. Reach B begins 1818 ft upstream of the road 450N bridge and continues upstream for 564 ft. Reach C begins 2877 ft upstream of the road 450N bridge and continues upstream for 558 ft.

Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data