Alpena Light
| Location | End of N breakwater at Thunder Bay River mouth, 150 ft. from shore, Alpena, Michigan |
|---|---|
| Coordinates | 45°3′37.5″N 83°25′22.44″W / 45.060417°N 83.4229000°W |
| Tower | |
| Constructed | 1914 |
| Foundation | Breakwater |
| Construction | Cast iron |
| Height | 34 feet (10 m) |
| Shape | four-legged pyramid skeleton tower |
| Markings | Red Daymark with upper part enclosed |
| Heritage | National Register of Historic Places listed place |
| Fog signal | HORN: 1 blast ev 15s (2s bl). Operates May 1 to Oct. 20. |
| Light | |
| First lit | 1914 |
| Focal height | 42 feet (13 m) |
| Lens | Fourth order Fresnel lens (original), 9.8-inch (250 mm) Tideland Signal acrylic optic (current) |
| Range | 12 nautical miles (22 km; 14 mi) |
| Characteristic | Fl R 5 secs |
Alpena Light | |
| Area | less than one acre |
| Architect | US Lighthouse Service |
| MPS | Light Stations of the United States MPS |
| NRHP reference No. | 06000197 |
| Added to NRHP | March 29, 2006 |
The Alpena Light, also known as the Thunder Bay River Lighthouse or Alpena Breakwater Light, is a lighthouse on Lake Huron near Alpena, Michigan. Standing on the north breakwater of Alpena Harbor, the light marks the entrance to the Thunder Bay River from Thunder Bay. The current lighthouse, built in 1914, replaced earlier wooden structures which had been in use since 1877 and 1888. The current light is a weather-protected structure on a steel frame. It was added to the National Register of Historic Places in 2006, and the state inventory list the same year.