Station list     Available data
ILLINOIS RIVER BASIN


05553800       ILLINOIS RIVER NEAR LOCK AND DAM AT STARVED ROCK, IL



LOCATION.-- Lat 41°19'40", long 89°00'29",in SE1/4 SW1/4 sec. 16 T.33N. R.2E., La Salle County, Hydrologic Unit 07130001, on left bank just upstream of boat launch at Starved Rock State Park 1.2 miles downstream of the lock and dam at Starved Rock.

DRAINAGE AREA.-- 11072 mi2.

PERIOD OF RECORD.--
BIOLOGICAL: Benthic macroinvertebrates, September 1997.

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 sampling reach begins at the boat ramp (1.2 mi downstream of dam) in Starved Rock State park and continues upstream for 0.8 mi around Plum Island. The surface area sampled at reach A was 0.63 m2.
BENTHIC MACROINVERTEBRATES
[sp., species; A, Adults; LV, Larvae; P, Pupae; X, present; -, not found]
PHYLUM
Class
Order
(Suborder)
Family Reach A
Subfamily 9/10/97
(Tribe)
Taxon Life stage Quantitative Qualitative
NEMATODA      
              Nematoda   - X
BRYOZOA      
              Bryozoa   3 -
MOLLUSCA      
  Gastropoda      
        Physidae      
              Physella sp.   - X
  Bivalvia      
        Dreissenidae      
              Dreissena polymorpha (Pallas)   - X
        Unionidae      
              Fusconaia sp.   - X
              Obliquaria reflexa Rafinesque   - X
        Corbiculidae      
              Corbicula sp.   - X
        Sphaeriidae      
              Sphaeriidae   - X
ANNELIDA      
  Oligochaeta      
        Naididae      
              Naididae   9 X
        Tubificidae      
              Tubificidae   - X
              Branchiura sowerbyi Beddard   - X
ARTHROPODA      
  Malacostraca      
    Amphipoda      
        Gammaridae      
              Gammarus sp.   - X
        Hyalellidae      
              Hyalella azteca (Saussure)   - X
  Insecta      
    Ephemeroptera      
              Ephemeroptera LV 3 -
      (Furcatergalia)      
        Caenidae      
              Caenis hilaris (Say) LV - X
              Caenis sp. LV 6 -
      (Pisciforma)      
        Baetidae      
              Labiobaetis sp. LV - X
              Procloeon sp. LV - X
      (Setisura)      
        Heptageniidae      
              Leucrocuta sp. LV - X
              Stenonema mexicanum (Ulmer) LV - X
              Stenonema terminatum (Walsh) LV - X
    Odonata      
      (Zygoptera)      
        Coenagrionidae      
              Argia sp. LV - X
    Trichoptera      
              Trichoptera P 9 -
      (Annulipalpia)      
        Hydropsychidae      
              Hydropsychidae LV 135 -
          Hydropsychinae      
              Cheumatopsyche sp. LV 12 X
              Cheumatopsyche sp. P - X
              Hydropsyche sp. P 3 -
              Hydropsyche bidens Ross LV 111 -
              Hydropsyche bidens Ross/orris Ross LV 135 -
              Hydropsyche orris Ross LV 783 X
              Hydropsyche orris Ross P 9 -
              Potamyia flava (Hagen) A - X
              Potamyia flava (Hagen) LV 9 X
              Potamyia flava (Hagen) P - X
        Polycentropodidae      
              Polycentropodidae LV 4 -
          Polycentropodinae      
              Cyrnellus fraternus (Banks) A - X
              Cyrnellus fraternus (Banks) LV 3 -
    Coleoptera      
      (Adephaga)      
        Dytiscidae      
          Colymbetinae      
            (Coptotomini)      
              Coptotomus sp. A - X
      (Polyphaga)      
        Hydrophilidae      
              Tropisternus sp. A - X
        Elmidae      
              Stenelmis sp. A - X
              Stenelmis grossa Sanderson A - X
    Diptera      
      (Nematocera)      
        Chironomidae      
              Chironomidae A 12 -
              Chironomidae LV - X
              Chironomidae P 9 -
          Chironominae      
              Chironominae P 6 X
            (Chironomini)      
              Chironomini LV 6 -
              Chironomus sp. LV - X
              Cryptochironomus sp. LV - X
              Dicrotendipes sp. LV 12 X
              Glyptotendipes sp. LV 9 X
              Parachironomus sp. LV - X
              Polypedilum sp. LV 84 X
              Stenochironomus sp. LV 3 -
            (Tanytarsini)      
              Rheotanytarsus sp. LV 42 X
          Orthocladiinae      
              Orthocladiinae LV 6 -
              Orthocladiinae P - X
              Cricotopus/Orthocladius sp. LV 24 -
              Nanocladius sp. LV 3 -
          Tanypodinae      
              Tanypodinae P - X
            (Pentaneurini)      
              Thienemannimyia group sp. LV 3 X
      (Brachycera)      
        Empididae      
              Hemerodromia sp. LV 6 -


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data