The U.S. Army Corps of Engineers has released a costly final draft of its plan to keep invasive Asian carp out of Lake Michigan.
But environmentalists say it will be worth every penny.
The plan at the Brandon Road Lock and Dam, about 60 miles south of Chicago, would cost about $775 million.
Drew YoungeDyke is with the National Wildlife Federal. He says the cost, although dramatically higher than the Corps' first draft plan, would be a small fraction of the cost to the fishing industry, if Asian carp got into the lakes.