05568000 DATA: Benthic Macroinvertebrates, 1996

ILLINOIS RIVER BASIN

05568000 MACKINAW RIVER NEAR GREEN VALLEY, IL

LOCATION.-- Lat 40°27'15", long 89°36'22", in SE1/4SE1/4 sec.12, T.23 N., R.5 W., Tazewell County, Hydrologic Unit 07130004, on right downstream side of bridge on Towerline Road, 2.5 mi east of State Highway 29, 3.9 mi northeast of Green Valley, 5.8 mi south of Pekin, 10.2 mi north of U.S. Highway 136, and at mile 17.3.

DRAINAGE AREA.-- 1,073 mi². Area at site used prior to Oct. 1, 1988, 1,089 mi².

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

DISCHARGE: March 1921 to October 1956; October 1988 to current year.

STAGE: Water years 1994-2000.

PARTIAL RECORD: Annual maximum, water years 1957-88.

SURFACE-WATER QUALITY

CHEMICAL: October 1997 to September 1998.

SEDIMENT: October 1994 to September 1997.

MISCELLANEOUS: Contaminants of streambed sediment, July 1997; contaminants of fish tissue, July 1997; streambank sediment size, October 1997; Streambed sediment size, October 1997.

BIOLOGICAL: Benthic macroinvertebrates, September 1996; fish, July 1997.

GAGE.-- Water-stage recorder, U.S. Army Corps of Engineers satellite telemeter and rain gage, and crest-stage gage. Datum of gage is 477.10 ft above sea level (levels by U.S. Army Corps of Engineers). Prior to Jan. 17, 1933, chain gage at site 3.5 mi downstream on railroad bridge at datum 2.00 ft higher. Jan. 17, 1933, to May 13, 1940, chain gage, and May 14, 1940 to Sept. 30, 1952, wire-weight gage at site 3.6 mi downstream at datum 2.00 ft higher. Oct. 1, 1952 to Oct. 31, 1956, wire-weight gage, and Nov. 1, 1956 to Sept. 30, 1988, crest-stage gage at site 3.6 mi down stream at present datum.

EXTREMES FOR PERIOD OF RECORD.--
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 51,000 ft³/s, Dec. 6, 1982, gage height, 16.13 ft (backwater from ice), site then in use; maximum recorded gage height, 28.29 ft, Sept. 16, 1993 (discharge unknown); minimum discharge observed, 17 ft³/s, Oct. 26, 27, 1940.
SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily, 6,160 mg/L, May 27, 1996; minimum daily, 4 mg/L, May 11, 1997.
SUSPENDED-SEDIMENT LOADS: Maximum daily 99,800 tons, May 27, 1996; minimum daily, 0.83 tons, Dec. 21, 1996.

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 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. The reach begins 2001 feet upstream of the Towerline Road bridge and continues upstream for 1099 feet. The surface area sampled was 0.19 m².

BENTHIC MACROINVERTEBRATES
[sp., species; A, Adults; LV, Larvae; P, Pupae; X, present; -, not found]

PHYLUM
	Class
		Order
			(Suborder)
				Family					Reach A
					Subfamily				9/9/96
						(Tribe)
							Taxon	Life stage	Quantitative	Qualitative

MOLLUSCA
		Gastropoda
				Physidae
							Physidae		-	X
ARTHROPODA
	Insecta
		Ephemeroptera
							Ephemeroptera	LV	112	-
			(Furcatergalia)
				Leptohyphidae
							Tricorythodes sp.	LV	8	X
			(Pisciforma)
				Baetidae
							Baetidae	LV	480	X
							Baetis sp.	LV	219	X
							Callibaetis sp.	LV	-	X
			(Setisura)
				Heptageniidae
							Heptageniidae	LV	32	-
							Heptagenia sp.	LV	2	-
							Stenonema sp.	LV	16	X
							Stenonema pulchellum (Walsh)	LV	2	-
				Isonychiidae
							Isonychia sp.	LV	2	X
		Odonata
			(Zygoptera)
				Coenagrionidae
							Argia sp.	LV	-	X
			(Anisoptera)
				Gomphidae
							Gomphidae	LV	-	X
							Gomphus sp.	LV	-	X
		Hemiptera
			(Heteroptera)
				Corixidae
							Corixidae	-	24	-
							Corixidae	LV	-	X
					Corixinae
						(Corixini)
							Trichocorixa sp.	A	-	X
				Gerridae
					Rhagodotarsinae
							Rheumatobates sp.	A	-	X
					Trepobatinae
							Metrobates sp.	LV	-	X
				Naucoridae
					Naucorinae
							Pelocoris sp.	A	-	X
		Trichoptera
			(Spicipalpia)
				Hydroptilidae
					Hydroptilinae
							Ochrotrichia tarsalis (Hagen)	P	8	-
			(Annulipalpia)
				Hydropsychidae
							Hydropsychidae	LV	376	X
					Hydropsychinae
							Hydropsyche sp.	LV	146	-
							Hydropsyche sp.	P	1	-
							Hydropsyche bidens Ross	LV	144	X
							Hydropsyche rossi Flint, Voshell, and Parker/simulans Ross	LV	59	X
							Potamyia flava (Hagen)	LV	-	X
		Coleoptera
			(Adephaga)
				Carabidae
							Carabidae	A	1	-
				Dytiscidae
					Laccophilinae
						(Laccophilini)
							Laccophilus sp.	A	-	X
				Haliplidae
							Peltodytes sp.	A	-	X
			(Polyphaga)
				Staphylinidae
							Staphylinidae	A	-	X
				Hydrophilidae
							Berosus sp.	A	-	X
							Enochrus sp.	A	-	X
							Tropisternus blatchleyi d'Orchymont	A	1	-
							Tropisternus lateralis (Fabricius)	A	-	X
				Scirtidae
							Scirtidae	LV	-	X
				Dryopidae
							Helichus lithophilus (Germar)	A	3	-
				Elmidae
							Macronychus glabratus Say	A	2	X
							Stenelmis sp.	A	6	-
							Stenelmis sp.	LV	-	X
		Diptera
			(Nematocera)
				Chironomidae
							Chironomidae	LV	353	X
							Chironomidae	P	16	-
					Chironominae
							Chironominae	P	-	X
						(Chironomini)
							Chironomus sp.	LV	-	X
							Cryptotendipes sp.	LV	-	X
							Dicrotendipes sp.	LV	-	X
							Glyptotendipes sp.	LV	-	X
							Polypedilum sp.	LV	-	X
						(Tanytarsini)
							Rheotanytarsus sp.	LV	-	X
							Tanytarsus sp.	LV	-	X
					Orthocladiinae
							Cricotopus/Orthocladius sp.	LV	-	X
					Tanypodinae
						(Pentaneurini)
							Ablabesmyia sp.	LV	-	X
							Larsia sp.	LV	-	X
							Thienemannimyia group sp.	LV	-	X
						(Procladiini)
							Procladius sp.	LV	-	X
				Simuliidae
							Simuliidae	LV	64	-
							Simuliidae	P	8	-
			(Brachycera)
				Empididae
							Chelifera/Hemerodromia sp.	P	-	X
							Hemerodromia sp.	LV	18	-

Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data