Good Morning Mark,
In some areas the overhang is as small as an inch and in one area it actually is about 9". This is due to the contour of the plywood. There will be fascia all along the edges of this area as well.
When the bench work was modified more bracing had to be installed to maintain its integrity. Along with that one support leg, shown in the pic, I can climb on the bench work with no problem. I did have to shim that particular leg because it had "sunk" into the carpet after months of initially being built.
Here is a pic of the under side of the lake area. Try not to get dizzy looking at them. The last three pics show various areas of overhang of the plywood in the lake/river area.
Dave
