Mosites was founded in 1959 with a focus on bridges, roadways, tunnels, and other transportation infrastructure, and that legacy continues to define our Heavy Highway Division today.
Our work across Western Pennsylvania and the surrounding region has played a key role in maintaining and improving essential public infrastructure. From complex bridge rehabilitations to large-scale roadway projects, we understand the importance of keeping systems operational while executing work safely and efficiently.
Backed by decades of experience, our team brings a disciplined approach to planning, coordination, and execution. The result is high-quality work delivered safely, on schedule, and with the reliability our partners expect.
We take a proactive approach to site safety and quality assurance, supported by proven construction methods and modern techniques. This allows us to execute complex heavy civil work with precision while meeting the high standards and expectations of our clients.
Earthwork & Site Preparation
Bridge Construction & Rehabilitation
Roadway & Highway Construction
Utility Installation & Coordination
Concrete Structures & Flatwork
Shotcrete
Retaining Walls & Structural Systems
Drainage and Stormwater Management
Traffic Control & Phased Construction
Demolition & Site Clearing
Environmental Controls & Compliance
Our Heavy Highway Division portfolio spans bridges, roadways, tunnels, walls, dams, and transit infrastructure, delivered for agencies including PennDOT, West Virginia Department of Highways, US Army Corps of Engineers, Pittsburgh Regional Transit, and the Pennsylvania Turnpike Commission.
Connect with us today to discuss your heavy infrastructure needs!