The document summarizes plans for a new bridge over the Hoover Dam between Nevada and Arizona. The bridge will be built without temporary supports using reusable sliding formwork and suspension cables. It will be a reinforced concrete twin arch design with steel struts and box girders to carry vehicle traffic. The bridge is expected to open in October 2010.

1. New Hoover Dam Bridge
Between Nevada and Arizona

2. Hoover Dam
Picture Title
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3. Nevada
Hoover Dam
California
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Picture Title
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4. Hoover Dam
Hoover Dam Bridge
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5. Nevada
State line Arizona
Time zone line
Hoover Dam
Hoover Dam Bridge
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6. New method to build
a reinforced concrete
bridge without the
conventional
temporary shoring

7. The suspension cables for temporary support

8. suspension cable

9. High line
cable conveyor
Reusable metal
sliding formwork

10. Suspension cables
temporary support
System

11. The concrete Arch designed for carrying
the temporary and permanent load

14. Conventional scaffold system, too expensive ! !

15. Steel strut
Reinforced concrete twin Arch
connected by steel struts

20. Steel Box Girders and
concrete roadway deck

21. Colorado
River

29. Lower twin arch was completed

30. Cut off the suspension
cables, when concrete
up to it’s strength

32. Reusable metal
sliding formwork
for reinforced
concrete columns

33. The upper deck
columns, build
on the top of the
lower twin arch

34. Steel Box
Girders

36. Pre-stressed concrete
and steel box
composite Girders

38. Hoover Dam Bridge over Colorado River

39. Hoover Dam Bypass Bridge
Opened Oct. 19, 2010

40. The center line of Colorado River and Hoover Dam Bridge was
State Line of Nevada and Arizona, and also a Time Zone
divided line of Pacific and Mountain Time, If drive from west to
the east, when you pass the bridge, you will enter Arizona and
gain one extra hour. Click

41. Name of the Bridge
• In the beginning called : Hoover Dam Bypass Bridge
now the official name was :
• Mike O’Callaghan – Tillman Killey
Memorial Bridge
Mike O'Callaghan – Joined the Marines at sixteen, 1952 he lost
part of his left leg in the battle of Korean War, 1971 to 1979 was
Governor of Nevada, later he was the Executive Editor at the
Las Vegas Sun newspaper, he died on March 5, 2004.
• Tillman Killey – Arizona famous NFL football player, he gave
up his well paid job and joined the army, he died by a friendly
fire in Afghanistan on April 22, 2004.
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42. Hoover Dam Bridge technical information
Designer : T. Y. Lin International ( 林同棪 )
1988 finished the investigation and environmental report.
The design work start in July 2001 & finish two years later.
• Bridge length : 1900 ft ( 580 m ).
• Arch span : 1060 ft ( 320 m ).
• Bridge width : Four lane highway.
• Bridge height : 840 ft ( 263 m ) , 2 nd height of U.S.
• Bridge away from Hoover Dam : 1600 ft ( 550 m).
• Construction began on Feb. 2005 and completion on Oct.2010.
• Construction cost : 114 million.
• This is the first Concrete-and-steel composite arch bridge built
in United State.
• Pedestrian access is provided over the bridge for tourists.
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43. Hoover Dam technical information
• Hoover Dam was built after 1930 Great Depression, it was a
project to increased job for American worker.
• Type : Concrete gravity - arch dam
• Top width : 45 ft ( 14 m), Base width : 660 ft ( 200 m)
• Dam height : 726 ft ( 230 m), and 1245 ft (380 m) long
• Construction begin at 1931 and finish at 1936
• Total cost : 49 million
• Reservoir : 28,537,000 Acre ft (35,200 Kilo cubic meter)
• Power annual generation : 4.2 Billion kwh
• Worker : Hired 5500 construction workers, Chinese labor was
forbidden by construction contract.
• Hoover Dam was a tour spot, every year more than million of
peoples visit there.
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44. 林同棪小傳 (T. Y. Lin) : Nov. 14, 1912 – Nov. 15,
2003
• 林同棪福建省福州人 ,1931 畢業於交通大學分校 , 唐山工
學院土木系 , 1933 獲得美國加州大學 University of
California, Berkeley 土木碩士學位 .
• 回國後任成榆鉄路 , 橋樑組總工程師 , 後任職於台糖鉄路處
處長 .
• 1946 回 UC Berkeley 土木系任教授 , 1976 年退休 .
• 1954 在美創立 T.Y. Lin International, 工程顧問公司 . 主
要承接預應力橋樑和大跨度建築等結構計算及設計為主 .
• 林同棪對預應力工程 (Pre-stressed and Post-
tensioning Concrete) 有精深的研究 , 他把理論應用到
實際的工程上 , 是世界知名的工程專家 , 因而有 ”預應力之
父” 之稱 .
• 在 1970 年代 , 先後在台湾 , 香港和中國大陸都設立分公
司.
• 1972 被選為中央研究院 , 院士 .
• 1986 獲得美國雷根總統之 National medal of Science.
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