I-90 Post-construction

In 2015, post construction, we conducted fish, mussel, aquatic macroinvertebrate, and bird surveys in the corridor and found:

  • 335 live individuals of 12 mussel species
  • Captured live individuals of the state-threatened Slippershell Mussel – Alasmidonta viridis
  • 3 most common species were:
    • White Heelsplitter – Lasmigona complanata
    • Plain Pocketbook – Lampsilis cardium
    • Cylindrical Papershell – Anodontoides ferussacianus
Alasmidonta viridis – Slippershell Mussel

Birds

We conducted searches and circular plot counts and found

  • 61 species of birds
  • 1 state – endangered species, Osprey, at 3 locations
  • Sparrows were the densest species group overall
Ruby-throated Hummingbird

Fish

Using minnow seines and backpack electroshockers in 2015 we found:

  • 46 of the 192 fish species native to Illinois
  • 3 state-listed species
    • Iowa Darter
    • Gravel Chub (7)
    • American Brook Lamprey (1)

There was no significant difference in species richness, community evenness, nor species diversity compared to our 2012 samples

Iowa Darter

 In 2017 we found:

  • 45 species
  • Gravel Chub (2)
  • American Brook Lamprey (3)

In the Kishwaukee River:

  • 32 species of fish
  • 4 species intolerant of poor water quality
Gravel Chub

Aquatic Macroinvertebrates

 We used the ILEPA 20-Jab Allocation Method for wadeable streams

  • Sites ranged from “Poor” to just under “Good” based on habitat assessment
  • Based on macroinvertebrates, the Kishwaukee River rated “Excellent,” Coon and Mosquito creeks “Good,” and Spring Creek “Fair”

Bats

In 206 we deployed acoustic monitors at 4 stream crossings

  • we recorded in May, July, and Septembr
  • over 14,000 bat passes were recorded
  • 10,566 were identified by software
  • 9 species of bats were detected
    • Big Brown, Eastern Red, Silver-haired, Little Brown, Tri-colored, Evening, and 2 federally listed species – Northern Long-eared Bat and Indiana Bat
Bat detector