| Thunder Bay National Marine Sanctuary and Underwater Preserve | |
|---|---|
 Great Lakes Maritime Heritage Center | |
  Location among Michigan's Underwater Preserves | |
| Location | Lake Huron (Alcona, Alpena, and Presque Isle counties, Michigan) |
| Nearest city | Alpena, Michigan |
| Coordinates | 45°00′12″N 83°15′11″W / 45.0034°N 83.253°W |
| Area | 4,300 sq mi (11,000 km2) |
| Established | June 22, 2000 |
| Governing body | Michigan Department of Natural Resources, National Oceanic and Atmospheric Administration |
Thunder Bay National Marine Sanctuary and Underwater Preserve is a United States National Marine Sanctuary on Lake Huron's Thunder Bay, within the northeastern region of the U.S. state of Michigan. It protects an estimated 116 historically significant shipwrecks ranging from nineteenth-century wooden side-wheeler paddle steamers to twentieth-century steel-hulled steamers. There are a great many wrecks in the sanctuary, and their preservation and protection is a concern for United States Government policymakers.[1] The landward boundary of the sanctuary extends from the western boundary of Presque Isle County to the southern boundary of Alcona County. The sanctuary extends east from the lakeshore to the international border. Alpena is the largest city in the area.
- ^ Statement of Thunder Bay National Marine Sanctuary Director Archived 2007-07-15 at the Wayback Machine