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1971 Map of Thunder Bay Island, 1974 Print
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1971 Map of Thunder Bay Island

USGS Topo · Published 1974

About this map

Thunder Bay Island and its neighboring landforms rise from the depths of Lake Huron in this detailed hydrographic and topographic study. Located within Alpena Twp, this archipelago is anchored by a historic Lighthouse situated on the southeastern tip of the largest island. The survey captures the intricate shoreline and surrounding shoals of Sugar Island and the smaller Gull Island to the northwest. Because this map incorporates hydrographic data from the U.S. Lake Survey, it provides a rare look at both the terrestrial contours and the submerged bathymetry surrounding these hazards to navigation. The isolation of these features reflects the maritime character of the region in the early 1970s, long a critical point for vessels navigating the Lake Huron shipping lanes.

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Map Details

Date Portrayed1971
Date Published1974
PublisherU.S. Geological Survey
Map TypeTopographic
Scale1:24,000
Physical Dimensions22 x 26.8 inches

Editions of this 1971 Thunder Bay Island Map

Historical Maps of Alpena Township Through Time

84 maps found

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Source Details

SourceU.S. Geological Survey
CopyrightPublic Domain