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1984 Map of Portage Entry

Name: 1984 Topographic Map of Portage Entry
Creator: U.S. Geological Survey
Published: 1986
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1986

About this map

Keweenaw Bay meets the southern end of the Keweenaw Peninsula here, where the critical waterway of the Portage River provides a passage toward the copper mining heartlands. The landscape is defined by the entrance to the ship canal, marked by the Portage Entry Lighthouse and the historical Crebassa Latitude Post at Jacobsville. This shoreline was essential for the regional economy, facilitating the movement of vessels between Lake Superior and the industrial hubs near Torch Lake.

Moving inland from the coast, the terrain transitions into the Copper Country State Forest, where small settlements like Klingville and Arnheim dot the boundary between Chassell and Baraga. The presence of a Rock Quarry near the shore hints at the extraction of the famed Jacobsville sandstone. Tracing the courses of the Snake River and Jarvi Creek reveals the low-lying, often marshy character of the land before it rises into the timbered tracts of the interior.