TRAVERSE CITY (AP) — The Army Corps of Engineers has sent Congress a $778 million plan to fortify an Illinois waterway with noisemakers, electric cables and other devices in the hope that they will prevent Asian carp from reaching the Great Lakes, where the aggressive invaders could leave other fish with too little to eat.

Lt. Gen. Todd Semonite on Thursday OK’d the plan to install defenses at the Brandon Road Lock and Dam near Joliet, Illinois. The site is a crucial choke point in an aquatic pathway between the lake and the carp-infested Illinois River.

The plan represents a compromise between proposals to erect barriers that would seal off Lake Michigan and less drastic measures such as stepped-up commercial fishing.