Nice! This is the exact task I'll be dealing with coming up. Tired of digging out the overflow ditch. Got one with the .17 HMR at near 60lb, but the next one in the family will be with either my .30 cal MKII or the .357 Slayer. About the same range as well.
@EZ, Beavers have their place, like all critters, but in some instances, as presented here, they are deemed pests and subject to removal... To the OP that was some good shooting in a pretty dynamic environment. How far was your shot?