Thunder Bay National Marine Sanctuary


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Duncan City
Historic Research Collection

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GPS Location : N45°24.787' W83°45.733'
Depth: 15 Feet
Wreck Length: 104 Feet Beam: 19 Feet
Gross Tonnage: 112 Cargo: Light
Launched: 1883 by Rand and Burger in Manitowoc, Wisconsin
Wrecked: circa 1923
Description: In 1927 the Michigan Limestone and Chemical Company of Rogers City surrendered Duncan City’s enrollment as “Abandoned as unfit for service.” The tug’s stern portion is largely intact with metal skeg, four bladed cast iron propeller, shaft and coupling still in place. A square iron post, wooden blade rudder is located astern of the propeller. The after deck with iron cleats and transom fashion pieces is disarticulated but somewhat intact. Most of the hull is covered by large cut limestone blocks and rip rap possibly indicating service as a breakwater for the nearby Calcite quarry.


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wreck coordinates Great Lakes Maritime Heritage Center