Set a drownder rig for beavers, use a size 2 double coil trap. Buy some beaver castor and put a little above the trap on the bank. Set your trap so it is level about 2 inch below water level. Beavers dont like the smell of other beavers comeing into thier turf. The drownding slide is very important, we use to use a old style can opener and run the wire through it. Your weght has to be pretty good sized like a bag of bricks.