Hoover Dam Bypass

HOOVER DAM BYPASS PROJECT

PRESENTED BY:-Abhitosh kumar

Neeraj kumarSanjeeb Naik

Introduction

• The Hoover Dam Bypass Project is a 3.5-mile corridor.

• A Project Management Team (PMT) was developed to oversee the design and construction of the project.

• Prior to completion of this project, the existing route of U.S. 93 used the top of Hoover Dam to cross the Colorado River. U.S. Highway 93 is the major commercial corridor between the states of Arizona, Nevada, and Utah

PROJECT SCHEDULE(till 2006)

*RED- Completed

PROJECT SCHEDULE(2010)

*Black-completed

Transmission line & Power house reallocation

•Aggressive schedule including reconfigration of power house , double circuiting to eliminate river crossing & removal of A&N switchyards.•This project of reallocation was given to WAPA.•Total cost- $10 million

Arizona Approach

•The conctract to construct the Arizona Approach was awarded to both RE Monks Construction and Vastco Inc., and was worth $21.4 million USD.• The project involved building a connection between US 93 and the Colorado River Bridge. •It also involved constructing a 1.8 mile long four-lane roadway, a 900 ft long bridge, a new traffic interchange to connect to the US 93, wildlife crossings, hiking trail access parking, and new drainage structures. •The Arizona Approach Phase was a successful preliminary operation of the Hoover dam bypass construction project, and was finshed right on schedule in December of 2004.

The Nevada Approach

•The contract for the Nevada Approach was awarded to Edward Kraemer & Sons, Inc for $30 million USD.• Within 2 years, they would go on to acheive success in their role building the new Hoover Dam bypass bridge's Nevada Approach•2.11 miles of new four-lane highway alignment that included six new bridges, a new US 93 traffic interchange, 50,000 square feet of retaining walls, wildlife crossings and a 1.6 mile extension of the River Mountain Loop hiking trail. •The Nevada approach was finally completed after a few delays in November of 2005.

Colorado river bridge

•The Obayashi Corporation and PSM Construction USA, Inc. were both awarded the contract.•Required 243 million TONS of concrete and 16 million pounds of steel, which was used to reinforce the concrete.• In terms of safety, every step of the process was treated as a separate engineering component, subjecting each step of the process to rigorous evaluation. •The project was inherently dangerous due to windy condidtions: The high-line crane system which utilized 2,300-foot long steel cables to hoist workers and materials actually collapsed on September 18, 2006 due to high winds in the area, causing a two year delay in the project.•On Thursday, October 14, 2010 the was finally complete, and by October 19, weeks ahead of schedule, traffic commenced to flow on the bridge.

Bibliography

http://www.soil-tech.com/resources/hoover-dam-bypass-bridge-info/http://www.hooverdambypass.org/default.htmhttp://www.hooverdambypass.org/default.htmhttp://www.soil-tech.com/resources/hoover-dam-bypass-bridge-info/http://www.hooverdambypass.org/News_Letters/HDBU-0607_prf5.pdf

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