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| Parsons bridge project reaches major milestone As equity partner and lead designer for Audubon Bridge Constructors, Parsons announced that the John James Audubon Bridge recently reached a significant milestone with the completion of the cable-stayed bridge spans over the Mississippi River in Louisiana. The $347 million John James Audubon Bridge is part of Louisiana's Transportation Infrastructure Model for Economic Development (TIMED) Program and involves the construction of a new 1,583-foot cable-stayed span designed for a 100-year life with 2 miles of approach spans, 7 additional bridges, and approximately 12 miles of new roadway. The superstructure for the cable-stayed span comprises steel plate girders made from Grade 50 weathering steel. Parsons incorporated several innovations into this project, including the elimination of sunken caissons by substituting tip-grouted drilled shafts and the use of galvanized strand for additional corrosion protection of the stay cables. As the Louisiana Department of Transportation's first design-build project, the John James Audubon Bridge is the longest cable-stayed bridge in the Americas. It connects Pointe Coupee and West Feliciana parishes in south-central Louisiana, and it will replace an existing ferry between the communities of New Roads and St. Francisville. The bridge is anticipated to open to traffic this year. write your comments about the article :: © 2011 Construction News :: home page |