Visit Your Local PBS Station PBS Home PBS Home Programs A-Z TV Schedules Watch Video Donate Shop PBS Search PBS
_ _
BUILDING BIG
Bridges
Domes
Skyscrapers
Dams
Tunnels
Buy the DVD
Spacer image with 5 links within the image
The Educators Guide
How to use this guide
Program Descriptions
Planning Ideas
To Activities
Additional Resources
Buy the Video
______
__ Program Descriptions: Tunnels
Bridges | Domes | Skyscrapers | Dams | Tunnels  


Photo: tunnel The need to cross a river, mountain, city, or ocean channel is sometimes great enough to justify the danger, difficulty, and expense of building a tunnel. The program describes the methods and machines involved in burrowing through the solid rock of a hillside or the soft mud beneath a river.

_ _ _ _
SegmentStart*End**Length*
Introduction"On the night of June 25, 1872 ...""Tunnels, coming next on Building Big."2:44
Big Dig: problem-solving; tradeoffs(2:44) Traffic on bridge"... just as they once did in the greatest city of the ancient world."2:01
Roman Tunnels: aqueducts; gravity; problem-solving(4:45) Model of Rome"... one of Roman engineering's most fundamental designs."5:12
Canal Tunnels: arches; side support; materials(9:57) Paw Paw tunnel"... lost patience with such a slow means of transportation."4:35
Hoosac Tunnel: problem-solving; explosives; surveying; measuring; worker safety(14:32) Exiting canal tunnel"... building even longer tunnels in a fraction of the time."7:56
Soft-Ground Tunnels: Brunel family; problem-solving; tunneling shield(22:28) Railroad tracks"... engineers would have to find a better way."9:59
Car Tunnels: subways; ventilation; problem-solving; fire(32:27) London street traffic"... need the best possible escape routes."7:53
The Chunnel: symbolism; safety; tunnel boring machines(40:20) English Channel"... last uncharted frontier: the underground."12:40

*Start times and lengths of video segments are written as minutes:seconds.
**End cues reflect a preliminary version of the program script. The final version may differ.

 
_
BUILDING BIG Home Page BUILDING BIG Site Map BUILDING BIG Labs BUILDING BIG Databank BUILDING BIG Glossary