PORTLAND (AP) — Federal fisheries officials say a proposed new Interstate-5 bridge across the Columbia River could promote development harmful to fish.

Plans are being considered to build the bridge to ease a bottleneck.

The National Marine Fisheries Service says it wants a better study of development and other potential impacts on protected species.

They say in a letter to the Oregon Department of Transportation that a seven-year construction project, if not timed right, could bring pollution and underwater noise lethal to fish.

And they say once it’s built, the storm water running off of the more than 40 acres of new pavement could send oil and chemicals into streams fish depend on.