Even if the barrier works perfectly, there's good odds some idiot will carry a livewell full of carp over to Petosky or Marquette and dump them in because "Them carp's good fishing!" That's how Lake Trout wound up in Yellowstone lake, among other places. Some rube figured he'd make his own little fishery. Of course, the lakers have eaten native cutthroat to near extinction....
The Army Corps of Engineers are certainly stars of the make-it-up-as-you-go-and-deal-with-consequences-later hall of fame, but they do have private competition.
