Bob,
Surely you are refereing to another Eddie? hahhaa
But of course, the pictures are much appreciated!! It's a great looking platform that I'm sure you'll come to love as much as the pond itself. We have a small pier on our little pond and somehow manage to walk out to the end of it just about every day. It's a magnet that pulls you to the pond with the ability to remove all will power to resist!!! hahahaa
The gangplank should be fun to build too. I'd probably pour a small pad on the shoreline and attach it there, or put wheels on that end of it so it can move easily. How much will your water level drop?
The hing to connect the two together presents a few problems. I like to use store bought when I can, but I'm not sure of how big you'd need to suppor the weight of the gangplank and people walking on it. Hinges are pretty strong, so I would think a large exterior gate hing would work. Use bolts with washers to mount it so the hinge back is in the up position so it will open when the water level drops.
Interesting.
Eddie