a diver swims next to a shipwreck
A diver swims over the remains of the Shamrock shipwreck. Photo: Jennifer Idol
sonar image of a shipwreck
Sonar image of the Shamrock shipwreck.

Vessel Type: Motor: wooden steam barge

GPS Location: N45° 03.077’ W83° 26.052’

Depth: 11 Feet

Wreck Length: 146 Feet

Beam: 30 Feet

Gross Tonnage: 403

Cargo: Lath

Launched: 1875 by Bower and Cash at St. Clair, Michigan

Wrecked: June 24, 1905

Mooring Buoy Data

Description: The steamer Shamrock, loaded with lumber, sprang a leak off Presque Isle. The derelict steamer was towed to Alpena, where it sank at a waterfront pier. Heavy seas in the days that followed tore the partially sunken vessel to pieces. The hulk was then moved out of the way of navigation and abandoned within a few hundred feet of another shipwreck, John F. Warner. Today, both wrecks sit in less than 15 feet of water and are easily accessible.

Great Lakes Maritime Collection digital archive:

the propeller at a shipwreck
The Shamrock shipwreck’s propeller looms into view. Photo: Jennifer Idol
a shipwreck covered in marine growth and muscles
Invasive mussels grow along the remains of the Shamrock shipwreck. Photo: Jennifer Idol