Filters: Tags: Congress (X)
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ADMMR map collection: Underground Workings in the Congress and Niagra Veins, Congress Mine, Part 3; 1 in. to 100 feet; 31 x 14 in.
USGS Historical Quadrangle in GeoPDF.
ADMMR map collection: Malartic hygrade - Congress Mine escape plan; 1 in. to 100 feet; 18 x 18 in.
ADMMR map collection: Underground Workings in the Congress and Niagra Veins, Congress Mine, Part 1; 1 in. to 100 feet; 54 x 39 in.
ADMMR map collection: Underground Workings in the Congress and Niagra Veins, Congress Mine, Part 2; 1 in. to 100 feet; 54 x 13 in.
ADMMR map collection: Mine workings on Congress Vein; 1 in. to 200 feet; 21 x 23 in.
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