2007-01-032022-02-032007-01-032022-02-03https://hdl.handle.net/11124/9829Date scanned: 2002-7-12.USBM #H-77867-P; Figure 11 Typical roof bolt installation showing use of angle and flat washers.Held in the Russell L. and Lyn Wood Mining History Archive, Arthur Lakes Library, Colorado School of Mines.Donor: United States Bureau of Mines.This image may show the construction 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).Rights management statement available at: http://library.mines.edu/digital/rights.htmlScenes, undergroundTunnels and tunnelingStillImage