I recently finished reading "The Gales of November", an excellent account of the Edmund Fitzgerald tragedy, with a tremendous amount of background on Great Lakes shipping, and lakers, in particular. I recommend it highly.
When I was still living on the east coast, my SCUBA club made annual trips to the St. Lawrence Seaway, in the Thousand Islands section, to dive on the many, many shipwrecks there. I was able to dive on two freighters, the Keystorm and the Roy Jodrey. They are impressive ships!
The Keystorm, (first image) sank after hitting a shoal in 1912. It's an older, and much smaller design, at 256' in length. The bow has a large gash, and sits in 20' of water right next to the shoal it hit. The length of the wreck heads straight down the slope with the props at 115'. The rudder is frozen in time, hard over, a clear sign that someone had an 'Oh Sh*t' moment right before the collision.
The Jodrey (second and third images) sank in 1974, also after hitting a shoal. It's a big ship, 640' in length, and deep--the keel is at about 240'. It's popular for tech/mixed gas diving. I've made five dives on it, and still have seen only a tiny amount of the wreck.
Some of the other, smaller, wrecks in the area are adjacent to, or in one case directly under, the ship channel. I can attest that when a big freighter passes close by, it is LOUD.