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1920-40s Mining Maps & Ephemera From Various Mines

Currency:USD Category:Collectibles Start Price:50.00 USD Estimated At:150.00 - 300.00 USD
1920-40s Mining Maps & Ephemera From Various Mines
Featured in this lot is a collection of mining maps & blueprints, non-operational stope maps and a store cost record spreadsheet circa 1920-40s from various mines throughout the United States. The lot includes 25 small maps of non-operational stopes in Nevada's North Croesus Mine, two mine shaft maps from the Great West Resources mine in the Wiluna Region of Western Australia, a top slice method for the La Colorada Mine in Cananea Sonora, Mexico, pages on the cost of building chutes and other mine related structures, blueprints for a drill bit extractor, a small map of Lamonta Mine, a store cost record of various mines showing the total cost of labor and supplies, and three blueprint maps of the Adirondack Mines in Northern New York. The documents in this lot show good condition overall with some documents showing creases, staining and foxing throughout with tears present. The documents measure from 26 1/2" L x 35" W to 5" L x 7 7/8" W.