Hope nobody is seriously thinking about ripping out a beaver dam... hard to image the park people would sign off on that. If the trail is getting soggy- move the trail.
Honestly it isn't that bad of an issue. The real issue arises when their dams fail in a spring flood. In all seriousness, it will flood and close south Middlebush rd. I can move the affected trail for sure. This will be less work than removing a dam. I know this as I remove a few in Maine on our property.
I haven't seen an actual dam or any proof that it is actually beavers. I just saw that the water lever is about 4-5 foot higher than I have ever seen it net rte 27. I will scout it this week and report it to the park's naturalist and let her make a call.