Michigan's Great Lakes bottomlands are the final resting place of hundreds of shipwrecks—the cold, fresh waters of the lakes preserve these time capsules of our heritage. A national marine sanctuary and 13 state-designated underwater preserves protect and interpret them.
- The Michigan Underwater Salvage and Preserve Committee advises cooperating state agencies on policies and permits concerning shipwrecks on Great Lakes bottomlands.
- The Michigan History Center partners with the National Oceanic and Atmospheric Administration on the management of the Thunder Bay National Marine Sanctuary and Underwater Preserve.
- The Michigan Underwater Preserves Council has details on each preserve.
- The Michigan Department of Environmental Quality provides information on Michigan law and permits affecting underwater resources.