I liked to use 1/2 steel plate [railroad ty for fastening rails]wired to the bottom of #3 or #4 coil spring traps with enough wire to allow the beaver to reach deep water.Find a spot where they are leaving the water to go onshore and place the trap in about 3-4" of H2O. Take a pea sized piece of the castor from another beaver and impail it on a sharp stick a foot up the bank onthe trail in front of the trap.An L shaped slide with a hole @ each end running down a drowning wire anchored into deep water completes the set.Farther away from water a large figure4 deadfall with a V shaped guiding fence nails them.Use a big log and a smaller one under to kill them clean.Obviously can't be used around public ares and pets as it's fatal.Beavers are very territorial so find a scent mound near the water and introduce the scent stick with a castor piece from a stange beaver to their area.Works like a damn. [castors are the walnut sized scent glands used in perfumes located at the underside base of the anal vent]Cedar smelling...........................sometimes worth morethan the hide dried on strings.....Harold