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Hoover Dam Canyon Bridge or the Mike O'Callaghan-Pat Tilman Memorial Bridge

xavier

 

 

Hoover dam and Canyon bridge

Click to go to 'the highest, longest: the viaduct de Millau'

Architectural wonders and joys at abelard.org

Google satellite map showing the Hoover Dam, the winding Route 93 and the start of construction of the new bridge.
Google satellite map showing the Hoover Dam, the winding Route 93 and the start of construction of the new bridge.

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Germans in France - St. Quentin cathedral Germans in France
Reims cathedral
Cambrai cathedral
Soissons cathedral
Arras cathedral

Gustave Eiffel’s first work: the Eiffel passerelle, Bordeaux

a dream unfulfilled - the transporter bridge [pont transbordeur], Bordeaux

a fifth bridge coming to Bordeaux: pont Bacalan-Bastide, a new vertical lift bridge

the 6th bridge at Rouen: Pont Gustave Flaubert,
new vertical lift bridge

Ile de France, Paris: in the context of Abelard and of French cathedrals

France’s western isles: Ile de Ré

France’s western iles: Ile d’Oleron

 

on first arriving in France - driving

France is not England

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Marianne - a French national symbol, with French definitive stamps

the calendar of the French Revolution

la belle époque

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the French umbrella & Aurillac

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the Citroën 2CV:
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short biography of Pierre (Peter) Abelard

introduction
constructing the hoover dam bridge
structural statistics and other interesting facts
end notes

related:

The Hoover Dam

Skywalk,
Grand Canyon

 

14 October 2010: The 271-metre high and 579-metre long Hoover Dam Canyon Bridge is dedicated and opened to traffic.

The Hoover or Boulder Dam, when it opened in 1935 included a scenic route to cross from one side of the dam to the other, from Nevada to Arizona or visa versa, by a road along the top of the dam.

Traffic on the Hoover dam. Image: .hooverdambypass.orgOver the decades, this narrow, two-lane road and its hairpin approach roads has become a bottleneck and safety hazard, so a solution had to be found. To compound the problems, multiple check points were placed on the road after the terrorist attacks of 9-11 in 2001.

This has resulted in another spectacular construction project, the dam itself being the first.

Officially titled the Mike O’Callaghan-Pat Tilman Memorial Bridge, this bridge is also known as the Hoover Dam Bypass, or the Colorado River Bridge. Regarding the other proposed name for this bridge, Mike O’Callagan was an Army veteran and the 23rd Governor of Nevada, while Pat Tillman was a former NFL player and Army veteran.

constructing the hoover dam bridge

Under construction, the twin concrete arch sections being supported by cable stays. Photo: hooverdambypass.orgUnder construction, the twin concrete arch sections being supported by cable stays.
Photo:
hooverdambypass.org

construction. Photo: FHWA/CFLHD
The twin-rib arches almost completed, but still supported by cable stays.
Photo: FHWA/CFLHD

Although the roadbed of this bridge will be supported by a twin-rib arch, it started life as a cable-stayed suspension bridge - the concrete sections of the bridge being supported by cable stays from temporary pylons until the twin-rib arch was completed and self-supporting.

The supporting stays removed and the supports for the roadbad being added. Photo: FHWA/CFLHD
The supporting stays removed and the supports for the roadbad being added.
Photo: FHWA/CFLHD

The new Hoover Dam bridge, or Mike O'Callaghan-Pat Tilman Memorial Bridge, in July 2010. Photo: Hoover Dam Bypass Project
The new Hoover Dam bridge, or Mike O’'Callaghan-Pat Tilman Memorial Bridge, in July 2010. Photo: Hoover Dam Bypass Project

Google satellite image, showing the road bed being laid on the new Hoover Dam bridge.
Google satellite image, showing the road bed being laid on the new Hoover Dam bridge.

artist's impression of the completed bridge. Image: Nevada Dept of Transportation
artist’s impression of the completed bridge. Image: Nevada Dept of Transportation

structural statistics and other interesting facts

  • bridge type: composite concrete deck arch bridge
    arch: concrete in compression, placed using a form traveler system
    upper structure: steel
    twin arch ribs connected by steel struts
  • height above Colorado river: 890 ft/271 m
  • total length: 1,900 ft/579 m
  • arch span: 1,060 ft/323 m
  • bridge arch rise: 277 ft/84.5 m
  • twin-rib arch:
    •106 pieces—53 per arch—mostly cast-in-place 24 ft/7.3 m at a time, using a temporary form traveler system
    • last section placed in position on 10 August 2009
    • stay removal completed on 27 August 2009, the arch then being self-supporting
  • length of Hoover Dam Bypass: 3.5 miles
  • road : four lanes
  • roadbed support: eight vertical steel piers supporting thirty six, 50-ton steel girders
  • estimated traffic load: 17,000 trucks and cars daily
  • location relative to the Hoover Dam: approx. 1,500 feet south
  • consruction started: 2005
  • predicted opening date: September 2010
  • bypass open for traffic: November 2010
  • cost: $240 million
  • master design: HDR Engineering, Inc.
  • bridgedesign: T. Y. Lin International
  • approach design: Sverdrup Civil, Inc
  • There is no toll for this new bypass road and bridge
  • the bridge components include:
    • 16,000,000 pounds of steel
    • 30,000 cubic yards of concrete
    • 2,000,000 yards of cable


other amazing bridges:
Highest, longest : the Viaduct de Millau
the 6th bridge at Rouen: Pont Gustave Flaubert, new vertical lift bridge
Pont Bacalan-Bastide Bordeaux, a new vertical lift bridge
Gustave Eiffel’s first work: the Eiffel passerelle, Bordeaux
transborder bridges around the world

Marker at abelard.org

Some reference keywords/tags:

end notes

  1. The Hoover Dam holds back water in Lake Mead. The lake is is 110 miles long and took six years to fill.

    There was much debate over the name for this dam as it was built. Other suggested names were Black Canyon Dam, Boulder Dam and Boulder Canyon Dam. The dam’s name was changed definitively in 1947.
    The Herbert Hoover administration changed the name from Boulder Dam to Hoover Dam in 1930 as a political move. In 1933, the Franklin Roosevelt administration changed it back to Boulder Dam, and under Harry Truman, the permanent name of Hoover Dam was restored.

Marker at abelard.org

Some reference keywords/tags:
Boulder Dam,Black Canyon Dam,Mike O'Callaghan-Pat Tilman Memorial Bridge,composite concrete deck arch bridge,cable-stayed suspension,Hoover Dam Canyon Bridge,Nevada,Arizona,Hoover Dam,twin-rib concrete arch

 


 

 

 

 

 

 


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