Concrete Segmental Bridge Solution Saves Money - 51H Monongahela River Bridge, Brownsville, Penn.

SEGMENTS, WINTER 2011, VOL. 56

The new Monongahela River Bridge (Fig. 1) near Brownsville, Pennsylvania is now under construction and scheduled to be completed in the fall of 2011. The bridge features long, arching spans and tall, slender piers to create a concrete segmental bridge to carry 4 lanes of traffic.

The 3,200' long bridge consists of seven spans, including a main span of 518', built in balanced cantilever construction (Fig. 2) to cross the river, two active rail lines, and local roads. C-shaped piers rise over 200 ft above the mountainous terrain and support the dual-cell box girder superstructure. FIGG worked with Walsh Construction to provide a Contractor Alternate design that resulted in a savings of $8.6 million for the Pennsylvania Turnpike Commission.

Project Details

Designer:

 

Owner:

Pennsylvania Turnpike Commission
 

Contractor:

Walsh Construction
 

Contractor Engineering Services:

 

Construction Engineering Inspection:

SAI Consulting Engineers and Finley Engineering Group
 

Form Travelers for Cast-in-Place Segments:

 

Post-Tensioning Materials:

 

Bearings:

 

Epoxy Supplier:

 

Prepackaged Grout:

 

Owner's Engineer:

Gannett Fleming and Finley Engineering Group
 

Alternate Design Team:

Walsh Construction / FIGG
 

Formwork for Piers and Cast-in-Place Segments: