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[porthole]

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[naitram]

i noticed the porta johns.....

[RedDevil]

What I think is amazing is those spans are hollow!!!  Absolutely amazing that they'll be able to bear the load of the road and traffic once all those cables are removed....

[rbaker]

Click on this group of pic to enjoy the full size version - vertigo not included.

Well those pictures really out did my little bit of infomation.
After I clicked on them it was just like you are there.

Great and thank you for sharing.

Richard

[sgchick]

Simply amazing pictures Duane

[09S/E roadglide]

 

[BG]

These people are flippin nuts!

Just a little....does look like fun though 

[mr_magoo]

Bridges are some of the best things i've worked on.  Thanks for sharing the pictures.

[TEQUILA -aka- RED RUM]

What I think is amazing is those spans are hollow!!!  Absolutely amazing that they'll be able to bear the load of the road and traffic once all those cables are removed....

            cables will stay there.........

[mrmagloo]

What I think is amazing is those spans are hollow!!!  Absolutely amazing that they'll be able to bear the load of the road and traffic once all those cables are removed....

No sure about whether the cables will remain or not, but I learned long ago that tubed shapes, meaning shapes with hollow internals are stronger and stiffer than than the same shape solid, provided you get a wall size over a certain spec. Meaning if you took a tube, and filled it in, not only would you waste more material, but you'd also make the structure weaker. Sounds weird but the engineering types insist that's the case? I don't get it??

[RedDevil]

THE WIDER VIEW: Taking shape, the new bridge at the Hoover Dam

Creeping closer inch by inch 900ft above the mighty Colorado River the two sides of a #160million bridge at the Hoover Dam in America slowly take shape.

The bridge will carry a new section of US Route 93 past the bottleneck of the old road which can be seen twisting and winding around and across the dam itself.

When complete, it will provide a new link between the states of Nevada and Arizona. In an incredible feat of engineering, the road will be supported on the two massive concrete arches which jut out of the rock face.

The arches are made up of 53 individual sections each 24ft long which have been cast on-site and are being lifted into place using an improvised high-wire crane strung between temporary

Spectacular: The new Hoover Dam bypass

The arches will eventually measure more than 1,000ft across. At the moment, the structure looks like a traditional suspension bridge. But once the arches are complete, the suspending cables on each side will be removed.

Extra vertical columns will then be installed on the arches to carry the road. The bridge has become known as the Hoover Dam bypass, although it is officially called the Mike O'Callaghan-Pat Tillman Memorial Bridge, after a former governor of Nevada and an American Football player from Arizona who joined the US Army and was killed in Afghanistan.

Work on the bridge started in 2005 and should finish next year. An estimated 17,000 cars and trucks will cross it every day.

The dam was started in 1931 and used enough concrete to build a road from New York to San Francisco. The stretch of water it created, Lake Mead, is 110 miles long and took six years to fill. The original road was opened at the same time as the famous dam in 1936.

  
 

This was the first post...note the highlighted area.     Still F'n amazing...

[erniezap]

Being afraid of heights, no way, no how, would you get me up there to work on this! 

[TEQUILA -aka- RED RUM]

This was the first post...note the highlighted area.     Still F'n amazing...

   amazing....................

[bandit]

Amazing pic, thanxs a lot!! Have been there at 1999, stayed
at Hoover until dark and drove donw to Vegas. Incredible view
and awesome ride  , 

[MKW]

Last visited approx 18 months ago and saw it then but now................  My wife and I are riding from TX to Vegas in April and will make the Dam/Bridge one of our stops.  I'm always amazed at "man made" structures of this magnitude and this will only add to my joy.