For grins I pulled up Goggle Earth Pro. Zoomed in on Jamestown Marina, then State Dock. Cool thing about that app is it lets you draw a square on the map and then measure the size in acres. Jamestown including the waters on both sides and around back the motel island along with boat docks out front and 1/2 the distance between it and State dock was 85-90 acres.

The full floating part of State dock with surrounding waters was 90-100 acres.

Approximate of course because it depends on how much surrounding waters you include.

What I got doing that was trying to image something like the size of state dock fitting in a slew anywhere close to the dam. Next thing I thought of how much traffic that would generate in the area, and how bad it would screw up Fall jumps in the dam area. And last......Would that create more traffic on 127 or what?

Then I thought, okay, I'll go along with it so long as the dock restaurante is a White Castles :-)