The Monogahela River Bridge Nears Completion, Section 51H, Brownsville, Pennsylvania


Construction will be completed by spring 2012 on the new Monongahela River Bridge near Brownsville, Pennsylvania which features long concrete segmental spans (Figs. 12, 13 and 14). The new bridge is part of the Mon/Fayette Expressway expansion (Section 51H) and will carry four lanes of traffic across the river to complete the link in this important transportation system.

The 3,200' long bridge features seven long, arching spans (259'-490'-490'-518'-504'-497'-264') and slender c-shaped piers up to 200' tall. The structure is being built using balanced cantilever construction to cross the river, two active rail lines, and local roads. The variable depth concrete segments consist of 89'4" wide, dual-cell box girders. Pier construction is complete and construction of the last two cantilevers is currently underway. Construction of this contractor alternate design for the Pennsylvania Turnpike Commission is by Walsh Construction and design by FIGG.

Project Details

Owner's Engineers:



Pennsylvania Turnpike Commission



Alternate Design Team:




Contractor Engineering Services:


Construction Engineering Inspection:

SAI Consulting Engineers, Finley Engineering Group, Inc.

Formwork for Piers and Cast-in-Place Segments:


Form Travelers for Cast-in-Place Segments:


Post-Tensioning Materials:




Prepackaged Grout: