So, yesterday, we added a thick metal grate over a half sunken drainage culvert we believe they are living in. It is connected to a marsh across the road which the muskrats must be coming from. It's easy for them to simply swim through the pipe and get to the pond. This should help, but I'm guessing they can just cross the road as well. We are looking into bringing in a professional to take care of the muskrats. Regulations are very strict here. Thanks again for all the help.
