Modjeski & Masters has been given the go-ahead to resume design work for a bridge in the USA that has been on hold since 2009.

The new cable-stayed bridge will cross the Monongahela River as part of the Pennsylvania Turnpike Commission's expansion of the Mon-Fayette Expressway. Modjeski & Masters had previously completed the preliminary design work for the bridge before the project was put on hold in 2009.

The firm had developed conceptual and preliminary designs for multiple truss, arch and cable-stayed bridge alternatives. Ultimately, a cable-stayed bridge design was found to be the most cost-competitive, durable and aesthetically pleasing choice.

A cost-savings review of the corridor has since been carried out, including changes in the proposed road connections. The design will move into the next phase of the project assuming a single-tower cable-stayed structure, carrying two lanes of traffic in each direction.

The initial design phase is set to be completed within 15 months, although a date for completion of final design and construction has yet to be determined. 

“This project continues our legacy of designing cable-stayed bridges that make a positive impact of their surroundings,” said Michael Britt, senior vice president and director of business development at Modjeski & Masters. “Western Pennsylvania, especially the Pittsburgh area, is so reliant on dependable bridges. We recognise how important this bridge will be in reducing congestion, improving safety and stimulating social and economic development in the Monongahela River Valley.”