I had heard about this dive from Scubaboard.com - but I called around to a few LDS’s no one had heard of it. It is very easy to find but it is a long walk from the parking lot of the Great River Park.
I saw what looked like telephone poles - they looked newer than what I would expect for a mast. But if it was a full schooner the mast may have broken and sunk in the muck or to your point it may have been a schooner transitioned into a barge that out lasted it useful lifespan...
Either way it is a neat dive - close to shore and inland from any real ship wrecks... :-)
BTW - still thinking RI dives... lol