Pond level finally dropped low enough (with help from the irrigation pump) to install the AgriDrain inlet water-control box. It took my 13-year old and me 5 hours to cut open the dock, cut the floor joist, build the trap door, and install the box. My son did a great job helping but did remark that I should have done this a few years back before I got "wrecked". He did the work under the dock. My only consern is how well the rubber sleeve will seal up against the 15" PVC pipe using the two hose clamps privided. The on-line instructions did not suggest using silicon, so I started by just following directions. I also hope that ice does not cause problems. Time will tell...