Kitchi-Gami Almanac

Current Map of Lake Superior


Sloop Wreck Now a National Historic Site

Not much is known about Wisconsin’s Big Bay Sloop Shipwreck - the remains of a small, unidentified sailing vessel resting in 25 feet of water in Madeline Island’s Big Bay on Lake Superior. But it is a rare find, and early in 2009 it was added to the National Register of Historic Places.

Big Bay Sloop, as it is called, is about 300 feet east of Big Bay State Park and is the only one of its kind found so far in Wisconsin waters. It’s a significant archaeological resource, says the Wisconsin Historical Society, and is important for understanding the construction and use of historic small craft on the Great Lakes. The vessel’s type and name have never been positively identified. That uncertainty “is due to an almost complete absence of either historical or contemporary documentation of small craft on the Great Lakes,” according to the historical society.

The vessel’s construction and the history of the development in the Apostle Islands indicate the sloop is from the period 1880 to 1920.


History Notes

Lake BulletApril 15, 1876: The first telegraph line in northern Wisconsin is completed near Ashland. Source: WisconsinHistory.org
Lake BulletMay 3, 1959: Ramon de Larrinaga is the first deep-draft ocean ship to enter Duluth harbor, after the opening of the St. Lawrence Seaway.  Source: Duluth Seaway Port Authority
Lake BulletMay 5, 1904: Crisp Point Lighthouse in Michigan is activated. Source: Crisp Point Historical Society
Lake BulletMay 16, 1885: Canadian Pacific Railway completed the Lake Superior segment to Fort William. Source: Canadian Pacific Railway; MSN Encarta Online


Lake Levels

Current Water Levels
The levels on the hydrographs are shown in both feet and meters above (+) or below (-) Chart Datum. Chart Datum, also known as Low Water Datum, for Lake Superior is 601.1 feet (183.2 meters). It is a reference plane to which water depth and Federal navigation improvement depths on navigation charts are referred.
Water Level Key


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