There is a permanent waterline that is created over time. Do you not notice thing about your surroundings that you see daily.Do you think you could notice an average increase of 2 or 3 inches at your dock given the tides and their cycle of daily difference?
And the docks of the neighbors, also, as we have all lived here a long time. We have only noticed that since the City replaced the 4 ft. wide by 3 ft. deep ditch with a 14" dia. pipe and filled the rest of the ditch next to my place in, that the neighbors across the street (inland of me, I am on the water) flood frequently.
Naturally, that was decided to be done by the city engineers consulting with the Department of Natural Resources scientists. So they created their own flooding.
Brilliant.
The elderly lady that lives in & owns the place across the street says that when the City comes out, they say that it works as intended. I do not live in the City (It's across the street), so...