WHITE RIVER, Wash. (AP) — The Army Corps of Engineers will complete a fish trapping facility 50 miles south of Seattle in October that will be the largest in North America.

The White River Fish Passage Facility will be able to handle roughly one million salmon per year.

The $131 million facility was built on the insistence of tribes and federal fisheries managers. It will replace an old facility that was only capable of trapping 20,000 fish per year.

Officials say the new facility will protect species like the spring chinook, steelhead and bull trout by snatching up pink salmons, which have become so numerous they are displacing other fish.