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Drill carriage jumbo and drilling detail, diagram

Arthur Lakes Library
; 
Russell L. and Lyn Wood Mining History Archive
; 
United States. Bureau of Mines
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Date
1900?-1999?
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Date Submitted
Keywords
Water supply
 Tunnels and tunneling
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Mining History - Images
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[Drill carriage jumbo and drilling detail, diagram].
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https://hdl.handle.net/11124/9830
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Abstract
A jumbo is a mobile drill carriage or scaffold on which several drills could be mounted. This illustration may depict construction details of part of the tunnel system for New York City's water supply from the Catskill watershed. In 1905 the New York State legislature passed an act allowing the City to acquire lands and build water control structures in the Catskills for its water supply, including the East Delaware Tunnel, West Delaware Tunnel and the Rondout Tunnel (Delaware Aqueduct).
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