Physical Format: Engineering maps / Contributor: Cook County Historical Society

Date Created:: 1881
Description:: Map shows improvements made and contemplated to the harbor of Grand Marais, depths, and area of proposed dredging.
Contributing Institution:: Cook County Historical Society
Type:: Cartographic
Format:: Engineering maps

Date Created:: 1885
Description:: Map issued ""to accompany C.J. Allen's Report of Operations for year ending June 30, 1885."" Shown are harbor depths, area excavated in 1884, and area excavated up to and including September 1883.
Contributing Institution:: Cook County Historical Society
Type:: Cartographic
Format:: Engineering maps

Date Created:: 1924 - 1934
Description:: Map shows location of proposed hydroelectric dam sites on the Pigeon River in Cook County, Minnesota and Ontario, Canada.
Contributing Institution:: Cook County Historical Society
Type:: Cartographic
Format:: Engineering maps

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