Using carriage-mounted pneumatic drills, workers advance a heading of the Hoosac Tunnel, America's first major rock tunnel, begun in 1851. Behind them, crews enlarge the tunnel with chisels. [For invoicing purposes]
![Using carriage-mounted pneumatic drills, workers advance a heading of the Hoosac Tunnel, America's first major rock tunnel, begun in 1851. Behind them, crews enlarge the tunnel with chisels. [For invoicing purposes]](https://d21cmcylgnyv91.cloudfront.net/LSnnCKB9weK17YidwOPGqVag81w=/fit-in/640x640/filters:watermark(https://s3-eu-west-1.amazonaws.com/hip-static/newsite/misc/C_watermark_v4_italic.png,center,center,50)/1640059.jpg "Using carriage-mounted pneumatic drills, workers advance a heading of the Hoosac Tunnel, America's first major rock tunnel, begun in 1851. Behind them, crews enlarge the tunnel with chisels. [For invoicing purposes]")
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Pixel Dimensions (W x H) : 3000x1261
File Size : 11,084kb
Aliases
- 0390006542
- 1-640-059
- 1640059
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