05553500 DATA: Benthic Macroinvertebrates, 1999

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 upper 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 425µm 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 feet, which is 492 feet downstream of the Ottawa navigation light number 238.5. The surface area sampled at reach A was 0.34 m².

BENTHIC MACROINVERTEBRATES
[sp., species; A, Adults; LV, Larvae; P, Pupae; X, present; -, not found]
PHYLUM
	Class
		Order
			(Suborder)
				Family					Reach A
					Subfamily				7/20/99
						(Tribe)
							Taxon	Life Stage	Quantitative	Qualitative

PLATYHELMINTHES
	Turbellaria
							Turbellaria		-	X
NEMATODA
							Nematoda		10	-
	Bivalvia
							Corbiculacea		-	X
ANNELIDA
	Oligochaeta
				Naididae
							Naididae		29	-
				Tubificidae
							Tubificidae		-	X
ARTHROPODA
	Malacostraca
		Amphipoda
				Gammaridae
							Gammarus sp.		-	X
				Hyalellidae
							Hyalella azteca (Saussure)		-	X
	Insecta
		Collembola
							Collembola		5	-
		Ephemeroptera
			(Furcatergalia)
				Leptohyphidae
							Tricorythodes sp.	LV	24	X
			(Pisciforma)
				Baetidae
							Baetidae	LV	10	-
							Baetis intercalaris McDunnough	LV	10	-
			(Setisura)
				Heptageniidae
							Heptageniidae	LV	-	X
							Stenacron interpunctatum (Say)	LV	-	X
							Stenonema sp.	LV	1	-
							Stenonema mexicanum (Ulmer)	LV	-	X
		Odonata
			(Zygoptera)
				Coenagrionidae
							Argia sp.	LV	-	X
			(Anisoptera)
				Gomphidae
							Gomphidae	LV	-	X
		Hemiptera
			(Heteroptera)
				Gerridae
					Rhagodotarsinae
							Rheumatobates sp.	LV	-	X
		Trichoptera
							Trichoptera	A	5	-
			(Spicipalpia)
				Hydroptilidae
					Hydroptilinae
							Hydroptila sp.	LV	101	-
							Hydroptila sp.	P	14	X
			(Annulipalpia)
				Hydropsychidae
							Hydropsychidae	LV	19	-
					Hydropsychinae
							Ceratopsyche sp.	LV	5	-
							Hydropsyche bidens Ross/orris Ross	LV	101	-
							Hydropsyche sp.	LV	19	-
							Hydropsyche sp.	P	2	-
							Hydropsyche orris Ross	LV	658	X
				Polycentropodidae
					Polycentropodinae
							Cyrnellus fraternus (Banks)	LV	48	X
		Coleoptera
			(Adephaga)
				Dytiscidae
					Laccophilinae
						(Laccophilini)
							Laccophilus sp.	A	-	X
				Gyrinidae
							Dineutus assimilis (Kirby)	A	-	X
							Gyrinus analis Say	A	-	X
			(Polyphaga)
				Elmidae
							Macronychus glabratus Say	A	-	X
							Stenelmis sp.	LV	-	X
		Diptera
			(Nematocera)
				Chironomidae
							Chironomidae	P	5	-
					Chironominae
							Chironominae	P	86	X
						(Chironomini)
							Chironomini	LV	-	X
							Cryptochironomus sp.	LV	-	X
							Dicrotendipes sp.	LV	58	X
							Endochironomus sp.	LV	-	-
							Glyptotendipes sp.	LV	91	X
							Parachironomus sp.	LV	-	X
							Polypedilum sp.	LV	134	X
							Stenochironomus sp.	LV	5	-
						(Tanytarsini)
							Rheotanytarsus sp.	LV	398	X
					Orthocladiinae
							Orthocladiinae	LV	-	X
							Orthocladiinae	P	19	-
							Cricotopus/Orthocladius sp.	LV	96	-
							Cricotopus bicinctus group	LV	5	X
							Cricotopus sp.	LV	38	X
							Nanocladius sp.	LV	10	-
					Tanypodinae
						(Pentaneurini)
							Pentaneurini	LV	10	-
							Thienemannimyia group sp.	LV	5	X
						(Procladiini)
							Procladius sp.	LV	-	X
				Tipulidae
							Tipulidae	P	-	X
					Limoniinae
							Limonia sp.	LV	-	X
			(Brachycera)
				Empididae
					Hemerodromiinae
							Hemerodromia sp.	LV	29	-

Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data