Landis Mill Bridge

Location: Lehigh County, PA

Owner: Pennsylvania Department of Transportation

Landis Mill BridgeCCJM proposed a creative solution for replacement of the SR 2047 bridge over Saucon Creek. The pile supported, 77 ft single span prestressed concrete spread box beam bridge built on a curved alignment required splayed beams with different length, skew angles and cross-slopes but successfully addressed all environmentally sensitive issues while improving safety.

Initially, funds were only available to replace the deteriorated single lane Landis Mill Bridge 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’s solution to this complex web of constraints was a pile-supported single span prestressed concrete spread box beam bridge, approximately 77 ft. long built on an adjusted horizontal and vertical alignment. Not only did this address the above project constraints it also enabled an expedited permit approval process through careful coordination with permitting agencies. 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.

The design 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.

“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