Public input sought on replacement of Spang Road bridge in Marshall

The window for Marshall residents to offer input online to Allegheny County Public Works regarding the replacement of a bridge on Spang Road is Sept. 10-24.

Big Sewickley Creek Bridge No. 7, which carries Spang Road into Warrendale, is considered too narrow. The project aims to improve safety and traffic flow in the area, and the county is seeking feedback.

“The Allegheny County Department of Public Works always values the public’s input on any of our projects. The input we receive for this specific project will help the department and its project design consultant, McCormick Taylor, refine plans and address any potential concerns prior to construction,” said Brent Wasko, public information officer for Allegheny County Department of Public Works.

To view details about the project and offer input, visit engagement.alleghenycounty.us. The project is listed under “See All County Projects” page.

The bridge project will involve removal of the existing bridge; construction of a new, wider bridge; approach roadway work; drainage improvements; stream grading; guide rail upgrades; and new signs and pavement markings, according to the county’s project description.

Safety and traffic flow will be improved by widening the bridge from its current width of 19 feet, 1 inch to a width of 30 feet.

The added width allows for two 10-foot travel lanes, a 4-foot left shoulder and a 6-foot right shoulder, which should better accommodate an increase in traffic in the area and any potential upgrades to Marshall-owned Spang Road, Wasko said.

“Several years ago, Marshall Township reached out to Allegheny County to discuss future development that is expected in the area and the anticipated increase in traffic associated with that growth. Since then, the county and township have worked together to get this project started,” Wasko said.

Spang Road will be closed about 500 feet west of its intersection with Warrendale Bayne Road, and traffic will be detoured using Warrendale Bayne, Markman Park and Pleasant Hill roads.

The detour length, which is 2.5 miles, is expected to take five minutes in regular traffic conditions, according to an online video presentation on the county’s website.

Big Sewickley Creek Bridge No. 7, which was built in 1910, is used by an average of 535 vehicles daily and has a bridge condition rating of 6, or fair, on a 0-9 scale based on National Bridge Inspection Standards established by the Federal Highway Administration.

Allegheny County tentatively anticipates advertising for a contractor in fall 2028, starting construction in spring 2029 and completing the project in fall 2029, Wasko said.

When necessary, representatives from public works or its consultant, McCormick Taylor, will respond to the questions and concerns received.

The project is made possible through Allegheny County, with funding from the Federal Highway Administration and Pennsylvania Department of Transportation.