GPS Location: N45°21.4116' W83°35.3682'
Depth: 10 Feet
Wreck Length: 185 Feet Beam: 25 Feet
Gross Tonnage: 543
Built: 1862 by Ira Lafrinier in Cleveland, Ohio
Wrecked: May 6, 1894
Description: Larger than the typical schooner of its time, American Union's deep draft got it in trouble more than once. When rounding Presque Isle in a heavy sea the ship ran up on the rocks at Thompson's Harbor and quickly broke apart. Its remains are now scattered and flattened on the lake bottom but are easily viewable to kayakers and snorkelers.
Link to historical information on this ship.
Thunder Bay National Marine Sanctuary: Enjoy diving the wrecks of Thunder Bay, but always respect the past. State and federal laws prohibit removing or disturbing artifacts. Future generations are depending on us to leave historic shipwrecks intact. Please take only pictures and leave only bubbles.
The Thunder Bay National Marine Sanctuary maintains seasonal moorings at many shipwreck sites. Available from May to September, the moorings make for safer diving and also protect shipwrecks from anchor damage. Sanctuary regulations require vessels to use moorings when present.