Station list     Available data
ILLINOIS RIVER BASIN


05553500       ILLINOIS RIVER AT OTTAWA, IL



LOCATION.-- Lat 41°20'17", long 88°51'10", in SW1/4SW1/4 sec.11, T.33 N., R.3 E., LaSalle County, Hydrologic Unit 07130001 downstream of the railroad bridge, 0.25 miles, and downstream 0.5 miles of the Route 23 bridge in Ottawa and the confluence with the Fox River.

DRAINAGE AREA.-- 10,949 mi2.

PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE
 

DISCHARGE: November 11, 1902 to December 31, 1903.

SURFACE-WATER QUALITY
 

CHEMICAL: Water years 1997-2000.

 

MISCELLANEOUS: Contaminants in streambed sediments, August 1998; contaminants in fish tissue, August, 1998.

BIOLOGICAL: Benthic Macroinvertebrates, September 1998, July 1999; fish, August 1998 and August 1999.

GAGE.-- Chain gage read twice daily. Prior to November 1, 1903, vertical staff at west end of first pier from the north abutment of the railroad bridge at same datum. Datum of gage is 579.48 ft above sea level (Chicago city datum).

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 46,900 ft3/s, Apr. 15, 1903, gage height, -119.08 ft CCD (460.40 ft above sea level); minimum discharge, 6,740 ft3/s, Sept. 8, 1903.

REMARKS FOR CURRENT YEAR.--Benthic macroinvertebrate community samples were collected as part of the National Water-Quality Assessment program (NAWQA) in the lower Illinois River Basin. One quantitative (Richest-Targeted Habitat) and one qualitative (Qualitative-Multiple Habitat) sample were collected in accordance with the NAWQA protocols (Cuffney and others, 1993). The quantitative sample was a composite of macroinvertebrates from about 10 submerged tree branches. Branches were cut underwater, gathered in a 425╡m mesh net, and invertebrates were washed or picked from the branches. The average length and average diameter of each branch were measured and used to calculate an approximate surface area. The qualitative sample was collected from many habitat types within the sampling reach to obtain as complete a list of invertebrate taxa as possible. All samples were processed by the USGS National Water-Quality Laboratory. Phylum, Class, Order, Suborder, Family, Subfamily, and Tribe are listed and arranged according to the USGS National Water-Quality Laboratory taxonomic hierarchy. Reach A begins at the red buoy near river mile 239, marking the top of Hitt Island, and continues downstream for 3281 ft, which is 492 ft downstream of the Ottawa navigation light number 238.5. The surface area sampled was 0.29 m2.

BENTHIC MACROINVERTEBRATES
[sp., species; A, Adults; LV, Larvae; P, Pupae; X, present; -, not found]
PHYLUM
Class
Order
(Suborder)
Family Reach A
Subfamily 9/8/98
(Tribe)
Taxon Life stage Quantitative Qualitative
PORIFERA
Spongillidae
Spongillidae - X
PLATYHELMINTHES
Turbellaria
Turbellaria - X
NEMATODA
Nematoda 28 -
MOLLUSCA
Gastropoda
Pleuroceridae
Pleurocera sp. - X
Ancylidae
Ferrissia sp. - X
Physidae
Physella sp. - X
Bivalvia
Dreissenidae
Dreissena polymorpha (Pallas) - X
Corbiculidae
Corbicula sp. - X
Sphaeriidae
Sphaeriidae - X
ANNELIDA
Oligochaeta
Naididae
Naididae 196 -
Tubificidae
Tubificidae - X
ARTHROPODA
Malacostraca
Isopoda
Asellidae
Caecidotea sp. - X
Amphipoda
Hyalellidae
Hyalella azteca (Saussure) - X
Insecta
Ephemeroptera
(Furcatergalia)
Leptohyphidae
Tricorythodes sp. LV 8 X
(Pisciforma)
Baetidae
Labiobaetis sp. LV 4 -
(Setisura)
Heptageniidae
Stenonema mexicanum (Ulmer) LV 6 X
Odonata
(Zygoptera)
Calopterygidae
Hetaerina sp. LV - X
Coenagrionidae
Argia sp. LV - X
Hemiptera
(Heteroptera)
Corixinae
(Corixini)
Trichocorixa sp. A - X
Trichoptera
(Spicipalpia)
Hydroptilidae
Hydroptilidae P 4 -
Hydroptilinae
Hydroptila sp. LV 24 -
Hydroptila waubesiana Betten P 8 -
(Annulipalpia)
Hydropsychidae
Hydropsychidae LV 140 -
Hydropsychinae
Hydropsyche bidens Ross LV 8 -
Hydropsyche bidens Ross/orris Ross LV 57 X
Hydropsyche orris Ross LV 217 X
Potamyia flava (Hagen) LV 6 X
Polycentropodidae
Polycentropodidae P 1 -
Polycentropodinae
Cyrnellus fraternus (Banks) LV 59 X
Coleoptera
(Polyphaga)
Elmidae
Macronychus glabratus Say LV 4 -
Macronychus glabratus Say A - X
Diptera
(Nematocera)
Chironomidae
Chironomidae LV 2 -
Chironomidae P 4 -
Chironominae
Chironominae P 36 X
(Chironomini)
Cryptochironomus sp. LV - X
Dicrotendipes sp. LV 92 X
Glyptotendipes sp. LV 404 X
Parachironomus sp. LV - X
Polypedilum sp. LV 236 X
(Tanytarsini)
Rheotanytarsus sp. LV 328 X
Tanytarsus sp. LV - X
Orthocladiinae
Orthocladiinae LV - X
Orthocladiinae P 4 X
Cricotopus/Orthocladius sp. LV 128 X
Eukiefferiella sp. LV - X
Nanocladius sp. LV 32 -
Orthocladius sp. LV 24 -
Tanypodinae
(Pentaneurini)
Ablabesmyia sp. LV 4 X
Tipulidae
Limoniinae
Limonia sp. LV - X



Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data