Schoharie Creek Bridge
What was the challenge?
Originally scoped as a deteriorated bridge replacement project, this project presented other opportunities for improvement both in the structure itself and in the function of the overall road system. The bridge possessed a substandard roadway width of 11.4 feet. Due to the bridge’s location across a 500-foot floodplain, it was also subjected to repeated flood conditions and damage. During flooding, the structure was inundated and the approach roadway was washed out, requiring repairs once the waters receded.
How did Barton & Loguidice provide a solution?
The first step was to construct a two-lane bridge plus shoulders to replace the former structure, increasing the width to 22 feet. A galvanized truss system was used for the new structure in order to ensure the longevity of the bridge. Next, steps were taken to address the flooding issue. To solve this problem, the approach roadway was armored in order to preserve integrity during overflow conditions and to prevent washout of material requiring repairs. In addition, the hydraulic function of the structure was improved through a raised profile, which helped the low chord elevation and included a 25 percent clear span increase between abutments.
Why was the project a success?
Throughout the construction process, public travel was preserved with the use of an adjacent temporary structure. The new structure not only improves vehicular travel due to its width, but its ability to prevent road washouts. Ultimately, both the infrastructure and public safety have been preserved and improved as a result of this project.