I could certainly be wrong, but the dam which is actually a tidal gate restricts things as it isn’t very wide as I recall the last time being down there watching kings come up. I’d think removing and widening the lake exit to the sound would allow more water movement both ways through the area, especially during high water events and king tides. Maybe not….
After Olympia flooded last year on a 18’+ king tide, I wonder if they’ve factored that into their plans.
If they do this, it will be interesting to also see what changes occur to the beach around the estuary. It’s kind of an ugly area right now.
SF