Hoover Dam Bridge [DVD-R]

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Building Americas longest concrete arched bridge is fraught with difficulties. At 400 metres above the valley floor and wind gusts at over 130 kilometres an hour, mistakes can cost lives. The searing heat also makes it extremely difficult to keep the concrete cool enough to pour it. If it sets too quickly, it may block pipes or crack, resulting in disaster. Once complete, the bridge will span the Black Canyon, connecting the Arizona and Nevada approach highways nearly 275 metres above the Colorado River.

DVD-R: This title is manufactured-on-demand when ordered from The Canny Store using the highest quality DVD-R discs.

Category: Documentaries

Type: Region 2 DVD-R

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