Before my 2 acre pond had water. I found the deepest spot and drove a extra long T-Post in the bottom and slipped a 20 foot piece of PVC pipe over it.Measuring from the bottom I marked it in one foot intervals with red paint. As the pond filled I knew exactly how deep it was and when it first went over the spillway I could read exactly how deep it was at full pool. It has been working for 4 years now. Don't know if you could do something like that near your dock. Just a idea.

Dear Alcohol, We had a deal where you would make me funnier, smarter, and a better dancer... I saw the video... We need to talk.