Endangered crayfish have altered the Tennessee Department of Transportation's construction plan on a major road widening project in Brentwood along Concord Road.
The Nashville Crayfish lives in the waters of Mill and Owl Creeks, which is located near the road project.
Officials from the Tennessee Wildlife Resources Agency told News 2 Williamson and Davidson counties are the only place in the world this particular type of crayfish exists.
TDOT officials said crews will not begin bridgework at the site until June since the crayfish's reproductive season is from October to May.
Biologist will first relocate the species downstream of the project.
TDOT added the crayfish should not cause any delays in completing the project because they will simply shift the bridgework from the late summer and fall and crews will work on other portions of the roadwork.
Some Williamson County residents said they are more concerned about traffic than the crayfish.
"I think we need to be more concerned about the citizens than the crayfish as far as getting through the area, being as congested as it is," resident Keith White said.