Visit Your Local PBS Station PBS Home PBS Home Programs A-Z TV Schedules Watch Video Donate Shop PBS Search PBS
BUILDING BIG Spacer image with 5 links within the image
The Tunnel Challenge
BUILDING BIG Home Page BUILDING BIG Site Map BUILDING BIG Labs BUILDING BIG Databank BUILDING BIG Glossary
Bridges
Domes
Skyscrapers
Dams
Tunnels
Buy the DVD
_  
Compressed Air Drill

Compressed Air Drill
an earsplitting drill that can rip through rock with ease

First used in a tunnel
in 1866, in the Hoosac Tunnel, in North Adams, Massachusetts


Did you know?
The compressed air drill made life much easier for workers in the Hoosac Tunnel. The drill was safe and three times more effective than gunpowder. In the choking dust, the drills also had a welcome side effect. Air blew out of the end of the drills and actually provided some fresh air in the stuffy Hoosac Tunnel. Before the compressed air drill, workers toiled in hot, steamy tunnels without any ventilation!


Tool or Technique   Locations
Check out another
tool or technique
  Choose
a location


  _
_