Thursday, March 3, 2011

Arizona's Bridges: Navajo Bridges (1)

I thought we might leave North Africa for awhile (while wishing North Africans success in their bid for greater freedom) and look at a few bridges of the American Southwest. 

It's fairly straightforward to build a bridge over a canyon. Just dig deep notches for the supports and build towers to support the cantilever spans until they meet over the canyon.

There's actually two Navajo Bridges across Marble Canyon. This one was completed a few years ago. We'll look at the older bridge tomorrow.
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Arizona's Bridges: Navajo Bridges (1) by Mark Yashinsky is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.

Wednesday, March 2, 2011

Algeria's Bridges: On the Road to Boumerdes (2)

The highway from Algiers to Boumerdes was widened to four lanes where a bridge crosses a narrow river.

Tuesday, March 1, 2011

Algeria's Bridges: Isser River Bridge (3)

My friend and cubicle neighbor Allaoua holding a delaminated bridge bearing from the Isser River Bridge. Allaoua acted as our guide and interpreter on our trip to Algeria. He promised to provide me some photos of some beautiful bridges in his hometown of Constantine, Algeria. Hopefully, we'll get them in the next few days.