Unclogging Massive Culvert | Beaver Dam | Dirty Job

One man toils to open a massive culvert clogged with a robust beaver dam.
This took place over a couple days. this is not my job and I am not paid to address this culvert. It is, however, in my vested interest to not see this culvert overwhelmed.
Spring melt and recent rains have allowed the beaver to build higher than ever before.
Let us know in the comment section if you have a better technique for tackling this beast. The water is too deep inside the culvert and drops off quickly on the entrance side.