Station list     Available data
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 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. 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