John James Audubon Bridge – New Roads and St. Francisville, Louisiana.
Download DBA Project Summary Sheet – JJA Bridge
Project Status: Active.
Project Websites: Project Home Page. Project Updates.
DBA Client: Audubon Bridge Constructors Joint Venture, a joint venture of Flatiron Construction, Granite Construction and Parsons Transportation Group.
DBA Services: DBA performed geotechnical engineering and design of the drilled shaft foundations for the main bridge piers and the high level approach spans. Other services included:
- QA review of the geotechnical reports for the pile supported approach bridges
- Developing and analyzing the drilled shaft load test plan
- Geotechnical engineering consulting during trial shaft installation
- Geotechnical engineering consulting during production shaft construction
Project Highlights: The John James Audubon Bridge project is a new Mississippi River crossing between Pointe Coupee and West Feliciana parishes in south central Louisiana, replacing and existing ferry service. The project includes 12 miles of roads and 8 bridges – 7 approach structures and the main structure over the river. The seven approach bridges are supported on driven prestressed precast concrete (PCC) piles. The river bridge has 4 lanes and is almost 2.5 miles long with prestressed PCC pile supported low level approaches, drilled shaft supported high approaches, and a cable-stayed main span that will be the longest in North America when it is complete. The cable-stayed span is supported by two main piers in the Mississippi River. Each pier has twenty 8-foot diameter tip grouted drilled shafts as its foundation system.
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| JJA Bridge Soil Exploration May 2006 |
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| JJA Bridge Drilled Shaft Construction 2007 |
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| JJA Bridge Construction – Shaft W5 and W21 July 08 |
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| JJA Bridge Construction – Shaft W12 and WHA Test Shaft – August 2008 |
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| JJA Bridge Construction – East Pier – September 2008 |
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| JJA Bridge Construction – East Pier Temporary Bent Piles – September 2008 |
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| JJA Construction – West Pier, WHA Test Shaft, and O-Cell tests – October 2008 |
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| JJA Construction – West Pier and West High Approach Shafts – April 2009 |
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| JJA Construction – East Pier and East High Approach – April 2009 |
Project Websites: Project Home Page. Project Updates.
Media Links: ENR.com January 9, 2008
Key Participants:
Owner: 
Louisiana Department of Transportation and Development
Program Manager: 
Louisiana TIMED Program
Design/Build Team:
Audubon Bridge Constructors, a joint venture of:
Parsons Transportation Group, 
Flatiron Construction Corporation,
Geotechnical Engineers:
