Larson Design Group (LDG) provided design services for a 54′ long pre-stressed concrete spread box beam bridge with reinforced concrete abutments and an 18’ curb-to-curb roadway width to replace an existing substandard structure. The new bridge abutments were constructed behind the existing cut stone abutments which minimized excavation. By keeping the existing cut stone abutments in place, stream disturbances were eliminated and costs were significantly reduced. Architectural surface treatment was incorporated into the design of the bridge barriers and wingwalls to resemble the existing cut stone masonry abutments. The new structure provides a safer crossing over Rock Run inside of Loyalsock State Forest. Weathering steel guide rail was chosen to blend into the environment.
LDG performed complete design and construction consultation services, including field survey, structural, hydraulic, and roadway design, as well as shop drawing review and initial safety inspection of the completed bridge. The project provides improved access to the State Forest for both the public and the Department of Conservation and Natural Resources (DCNR).
LDG coordinated with DCNR personnel to provide a structure that met the vehicular requirements of the site and a Context Sensitive Structure that blends into the environment.
LDG completed the project in 6 months on an accelerated design schedule to meet the Department’s letting date.