I guess you break the dam enough to get the water dropping and they come to finish? Around here, if nobody traps them they hire a track hoe to clean it out, a hydro pole is used to jam into the culvert if needed to punch the plug through. On occasion, that gets suction stuck inside the culvert too…lol.
No,I take them right down to natural flow.Same as I did all the years on the RR.
Under the council contracts breaking the dam is by mutual agreement between the complainant and the trapper.
Most will pay the trapper to remove the dam.Trapper can refuse to do that work if he deems it too dangerous,like a small culvert holding back a lot of water(deep) that can only be opened from going in.
I never refuse to open a dam to natural flow.I have refused a couple small culverts like explained above,but only because I work alone.I opened lots of those on the Railroad since I had a helper.
OPG(Hydro) union did not want the trapper to do it-claimed it was their work.Stopped the company from getting the trapper to do it.
It is illegal in Ontario for anyone to break a beaver dam without having the beaver removed first.Exception being an urgent case where public is in danger.
Also illegal under federal law(fisheries and oceans) to let large amounts of water go downstream.Fines are extremely heavy for companies or individuals doing that if they get caught.have to let large amounts of water go a little at a time over an extended period of time according to the fisheries and oceans requirements.