Station list     Available data
ILLINOIS RIVER BASIN


05586100       ILLINOIS RIVER AT VALLEY CITY, IL

 

LOCATION.-- Lat 39°42'12", long 90°38'43" (NAD of 1927), in SE1/4NW1/4 sec.34, T.15 N., R.14 W., Scott County, Hydrologic Unit 07130011, on upstream side of Norfolk & Southern Corporation Railroad bridge at Flints Creek, 0.4 mi east of Valley City, 1.8 mi downstream from Mauvaise Terre Creek, and at mile 61.3. Auxiliary gage 10.0 miles upstream.

 

DRAINAGE AREA.-- 26,743 mi2, does not include diversion from Lake Michigan through the Chicago Sanitary and Ship Canal, which has occurred since Jan. 17, 1900.

 

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE

 

DISCHARGE: October 1938 to current year. Prior to October 1960, at site 0.2 mi upstream at same datum. Prior to October 1989, published as "at Meredosia." Records are considered equivalent.

 

STAGE: Water years 1994 to current year.

 

PARTIAL RECORD: Annual maximum, water years 1921 to 1938.

SURFACE-WATER QUALITY

 

CHEMICAL: Water years 1975-93 and 1996 to current year.

 

DISSOLVED OXYGEN: Water years 2001-2003.
PH: Water years 2001-2003.

 

SEDIMENT: February 1980 to current year

 

SPECIFIC CONDUCTANCE: Water years 1975-81, 2001-2003.

 

TURBIDITY: Water years 2001-2003.

 

WATER TEMPERATURE: Water years 1975-81, 2001-2003.

 

MISCELLANEOUS: Contaminants in streambed sediments, October 1996; contaminants in fish tissue, October 1996; sediment concentration and particle size, water years 1996-2005.

BIOLOGICAL

 

ALGAE: Water years 1980-81, 1996-98, and 2002 to current year.

 

BENTHIC MACROINVERTEBRATES: Water years 1997-98, 2002 to current year.

 

FISH: Water year 1998, 2003 to current year.

 

HABITAT: Water years 1997-98, 2003, 2005.

 

GAGE.-- U.S. Army Corps of Engineer's water-stage recorder and satellite telemeter, and crest-stage gage. Datum of gage is 418.00 ft above NGVD of 1929 (levels by U.S. Army Corps of Engineers) (417.65 ft NAVD 1988). Prior to Nov. 25, 1992 and Oct. 1, 1994 to current; auxiliary gage (05585500) at site 10.0 mi upstream. Nov. 25, 1992 to Sept. 30, 1994; auxiliary gage operated at this site (05586100).

 

REMARKS.-- Occasional regulation at low flow by navigation dam at La Grange. Since Jan. 17, 1900, flow has included diversion from Lake Michigan through Chicago Sanitary and Ship Canal. Suspended-sediment samples were collected by local observers generally twice weekly with additional samples collected during high runoff periods. Since February 1994, samples used to compute sediment record have been collected at upstream side Rt. 106 bridge at Florence at mile 56.

 

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 123,000 ft3/s, May 26-28, 1943; maximum gage height, 28.61 ft, May 26, 1943; minimum daily discharge, 1,330 ft3/s, Sept. 2, 1984.

SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily, 3,720 mg/L, Apr. 14, 1981; minimum daily, 14 mg/L, Dec. 26, 1984, July 21, 1993.

SUSPENDED-SEDIMENT LOADS: Maximum daily, 410,000 tons, June 4, 1980; minimum daily, 172 tons, Sept. 2, 1984. Habitat measurements, including physical and geomorphic, were collected as part of the National Water-Quality Assessment (NAWQA) program in the lower Illinois River Basin. The measurements were collected according to Meador and others (1993). Reach A begins at river mile 59, upstream of Big Blue Island, and continues downstream for 2460 ft.




Tabular-Text Files of Habitat Reach Data for Water Year 2003

The following links list up to five tab-delimited text files containing habitat reach data collected at this site. An explanation of column headers in these files can be accessed at this link.

Reach -- General description of the sampled reach.

Geomorphic Channel Unit (GCU) -- Fluvial geomorphic descriptors of channel shape and stream velocity (for example pool, riffle, or run).

Transect -- Channel and bank measurements made along transects (cross sections) within each reach.

Channel features -- Measurements of bars, shelves, and islands at each transect (cross section).

Transect Points -- Channel and substrate measurements and observations at points along a transect (cross section).



Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data