Landis Mill Bridge

Location: Lehigh County, PA

Owner: Pennsylvania Department of Transportation

Landis Mill Bridge - AFTERCCJM guided development of a modern solution to complex project parameters in the Landis Mill Bridge Replacement Project through a careful balance of cost and schedule.

As originally scoped by the Department, funds were only available to replace the structurally deficient and functionally obsolete existing single lane, Landis Mill Bridge (constructed in 1921) with very limited roadway approach work. While this limited budget made fiscal sense, it created other issues.

This lower-cost solution would have created unacceptable impacts within the environmentally sensitive project area which includes a naturally reproducing trout stream, exceptional value wetlands and the Landis Mill historic district. Additionally, while this solution had a lower cost than other alternatives, it did not address a safety issue related to the alignment.

CCJM proposed alternatives to address these issues, all with carefully developed cost estimates that balanced the benefit with the overall project cost.

In the end, PennDOT affirmed CCJM’s preferred alternative, a single span prestressed concrete spread box beam bridge, approximately 77 ft. long on an adjusted horizontal and vertical alignment. Not only did this address the above project constraints, but it also expedited the project schedule since the environmental clearance process was shortened considerably. CCJM design activities included cultural resource analysis, wetland studies, preparation of a Categorical Exclusion Evaluation, historical district avoidance, field survey, roadway realignment, ROW, utilities, hydrologic and hydraulic analysis, NPDES/PCSM, erosion and sediment pollution control and structure design.

Finally, the affirmed project alternative also satisfactorily addressed the concerns of the Pennsylvania Fish and Boat Commission regarding wetland impacts and anti-degradation of the sensitive waterway. CCJM was responsible for a significant public involvement program including assisting the community to determine the appropriate context sensitive design and assisting the Township and an adjoining property owner resolve a complex hydraulic modeling dispute.

In this case, our experienced senior engineers’ participation in the project from its inception, together with our decades of experience facilitated a successful project solution built on effective cost management.

“Charles Babcock was instrumental in “Right Sizing” this project to avoid the Historic District and save the Department both time and money. CCJM has worked very well with the District in order to get the project let.”

Heather Heeter
Project Manager
PennDOT, District 5-0