We have been assessing fish populations within the Tollway corridor using:

– backpack electrofishing
barge electrofishing
– a
nd minnow seines

Gravel Chub
Iowa Darter
Central stoneroller


I-90 pre-construction
I-90 post construction
– IL53-IL120 extension assessment
IL Rt 390 extension
Iowa Darter reassessment
– Gravel Chub fecundity


Sherwood, J.L., A.J. Stites, M.J. Dreslik, J.S. Tiemann. 2018. Predicting the Range of a regionally threatened, benthic fish using species distribution models and field surveys. Journal of Fish Biology. doi:10.1111/jfb.13819

Tiemann, J.S., C.A. Taylor, D. Wylie, J. Lamer, P.W. Willink, F.M. Veraldi, S.M. Pescitelli, B. Lubinski, T. Thomas, R. Sauer, and B. Cantrell. 2015. Range expansions and new drainage records for select Illinois fishes. Transactions of the Illinois State Academy of Science 108:47-52.

Highlights from our work:

  • The streams along the I-90 corridor were quite species-rich and diverse for fishes.
  • Twenty-one threatened or endangered species and two sensitive habitat types have been found in the Rt 53 North Extension corridor historically, but thus far only 6 of the species have been found, 4 plants and 2 fishes.