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

xavier

::Index for motoring in France:: On first arriving in France - driving Motorway aires, introduction Mas d'Agenais, A62: country idyll Pech Loubat, A61: in the land of the Cathars Les Pyrénées, A64: le Tour de France Les Bréguières, A8: motor museum Lozay, A10: Romanesque statues and other masonry Hastingues, A64: the pilgrimage of Compostelle and a local bastide Chateau de Salses/Catalan village, A9 Three aires on the canal du midi, A61 Ayguesvives aire, A61 Renneville aire, A61 Port-lauragais aire, A61 Aires on the magnificent A75 autoroute Tavel nord aire, A9 - Nef solaire, giant sundials aires on the A89 autoroute from Bordeaux to Clermont-Ferrand and beyond aires on the busy A7 autoroute from Lyons to Marseille Dunes aire, on the A62 autoroute The viaduct de Millau, A10

france

new:

Cestas aire - a stop on the Wild West, Bordeaux to the Spanish border - the N10 and A63

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

Marianne - a French national symbol, with French definitive stamps

the calendar of the French Revolution

la belle époque

Grand Palais, Paris

Pic du Midi - observing stars clearly, A64

Carcassonne, A61: world heritage fortified city

Futuroscope

Vulcania

Space City, Toulouse

the French umbrella & Aurillac

50 years old: Citroën DS

the Citroën 2CV:
a French motoring icon

the forest as seen by francois mauriac, and today

places and playtime

roundabout art of Les Landes

le pique-nique

Hermès scarves

bastide towns

mardi gras! carnival in Basque country

what a hair cut! m & french pop/rock

country life in France: the poultry fair

short biography of Pierre (Peter) Abelard

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

The Hoover 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.

Over 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. 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.org

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

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

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

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.

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