The CMP is the beinning of the system catchbasins also flow into the pipe furthur down stream and they surcharge and cause flooding also. I anm not sure if the condition of the pipe where i can't see, but knowing the authority i would assume there is debris in it they are not keen on...
I have an area that has seen flooding and I am tying to model the existing conditions. The area is large 100 plus acres and has a number of different culverts, open channels, fields, residential areas and piping systems. I have read the threads along with some videos on line to help. The...