Thunder Bay Underwater Preserve

The Underwater Preserve / Marine Sanctuary currently encompass 4300 square miles of Lake Huron surrounding Alpena, Alcona, and Presque Isle Counties in North East Michigan.

The waters around the Underwater Preserve / Marine Sanctuary are commonly known as “Shipwreck Alley” due to bad weather, thick fog, and numerous rocky shoals which have led to the sinking of many ships, most of which have been well preserved, with the exception of the shallow wrecks which have succumbed to the ravages of winter ice, and wave action, however the deeper wrecks look as if they could be floated off the bottom, and continue their voyage.

Kayakers and snorkerlers are able to take full advantage of our shallow wrecks, the wrecks throughout the Preserve / Marine Sanctary vary in depth from 6 feet to 200+ feet in depth, the area around Alpena has numerous sinkhole formations, with some that are accessible to divers. For the non-diving community Alpena hosts glass bottom boat tours.

The TBUPC members volunteer at numerous dive, and sportsmen shows, NOAA’s annual ROV competition, and Maritime Heritage Festival both held annually in Alpena.

Also located at Alpena Regional Medical Center are two state of the art Hyperbaric chambers

Alpena Shipwreck Tours

Starting the Summer of 2011, The 65 foot "Lady Michigan" is offering glass bottom boat tours, so the non-diver can partake in viewing some of the Ship Wrecks within the Marine Sanctuary.

For more information visit: Alpena Shipwreck Tours

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Dive Charters

Dive Regulations