Hoover Dam Bypass Technical Presentation

How Did
They Do That?

© 2012 By Blue Elephant Consulting / www.BlueElephantConsulting.com

The Hover Dam Bypass Bridge Presentation

• You are the chief engineer for the bridge
• You are going to be presenting to a group of Nevada
voters
• In a tough economy they’ve just discovered that
they’ve paid $240M for a bridge when they already
had one that worked.
• Your job is to explain to them what they got and why
they got it...
The purpose of this presentation
is to demonstrate how to create and
deliver an effective technical
presentation.

The Hoover Dam Problem

Major security issues

Too much traffic


The world had changed and the Hoover Dam had not


Traffic problems were growing and a new security threat
had been realized.


# Of Cars Crossing The Hoover Dam / Day

14000
13000
12000
11000
10000
9000
East
8000
7000
6000
5000
4000
2004 2005 2006 2007 2008 2009


Traffic over the bridge would be reduced and traffic problems
would go away

X


A new bridge had to be built that could solve both the traffic
and the security problem.


Highways and transmission towers had to be changed


New highways on the Nevada and Arizona sides were created


Canyon bridges were created and transmission towers were
moved


Existing highway will still be used for Dam
visitors


The type of bridge to be built had to be studied and selected


6 design options were proposed and considered
Steel Vierendeel Arch

Concrete – Steel Composite

Steel Solid Rib

Concrete Solid Rib

Steel Trussed Rib

Concrete Solid Rib


The public was allowed to vote, but the final decision was
made by the Executive Management Committee


The Composite Concrete Deck Arch Bridge was selected


Who Paid For The New Bridge?

U.S.
Az
Nv
Bonds


The actual construction of the bridge required careful
planning and attention to detail


This bridge was designed to be a national landmark


The towers presented a significant challenge during the
construction


The building of the concrete arch required a great deal of
careful coordination


Traffic problems were growing and a new security threat had
been realized.


Traffic and security problems caused the U.S. 93 route over
the Hoover Dam to no longer be an acceptable solution


Building another bridge over the Colorado River was the
needed solution.


The bridge was built and opened for service on October 19, 2010


Hoover Dam Bypass Technical Presentation

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