If I could get the floater to consistently work It would open up a lot of prime water. We have several big rivers here and they are full of rats. The problem is current and the colonies don't get along well. The colony doors get plugged up with garbage. I have also found that it is extremely difficult to locate good sets (depth, extreme water level changes, etc.) and there just doesn't seem to be as much visible sign in big rivers. If I ever figure out a way to actually draw rats to the trap and have consistent catches, now that's going to make for a great season.