Modjeski and Masters to Design New River Bridge
As Part of Mon/Fayette Expressway
 

Modjeski and Masters was selected by the Pennsylvania Turnpike Commission in November, 2002 to design a new Monongahela River Bridge, which will be the centerpiece of the 24 mile long, $1.9 billion Mon/Fayette Allegheny Expressway being planned by the Turnpike. This expressway will be a four lane, tolled limited access highway.  Although the expressway will be four lanes, the Monongahela River Bridge will carry eight lanes of traffic.

This mainline structure will span the former U.S. Steel Duquesne Works, several railroad tracks and the Monongahela River, touching down in North Versailles Township. The Draft Environmental Impact Statement (DEIS) preliminarily defines the crossing as a three-span structure with a main span of approximately 900 feet and back spans of approximately 600 feet. Only one set of piers will be located in the river.

The length of the project is approximately 2,100 feet and entirely on structure.  Structures types that are likely to be considered for this project include cable-stayed, steel through truss, simple span steel arch, continuous steel tied arch, steel orthotropic box girder, cast-in-place balanced cantilever box girder, and precast semental arch.  Both dual and single structures will be evaluated. 

The purpose of the project is to provide improved access to economically depressed Mon Valley communities, to encourage redevelopment of abandoned industrial sites, to encourage revitalization of neighborhoods and to relieve traffic congestion on the over-loaded local roadways in southeastern and eastern Allegheny County.  

Modjeski and Masters looks forward to working with both the Turnpike and effected communities to prepare a well-accepted, functional and cost-effective design that will serve the transportation needs of the area well into the future.

To learn more about the Mon Fayette Expressway visit the Turnpike's website at www.paturnpike.com/MonFaySB/51to376/51to376.htm

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