Built in 1954, the existing bridge over Liberty Branch Creek on State Route 25 in rural Sumner County had seen better days after years of service. Additionally, peak-hour traffic volumes and the functional layout of SR 25 would not facilitate a traditional traffic control plan for this location. Recognizing the failing bridge was in need of major and time-consuming repairs, Tennessee Department of Transportation (TDOT) selected Gresham Smith to develop a set of plans for the rural bridge repair project that would provide a reliable structure for years to come while addressing current traffic issues.
lane rural state route
single-weekend road closure to complete ABC
hours ahead of schedule
Finding the Right SolutionThe two-lane rural state route proved to be a challenging setting for the bridge rehabilitation project. Concerned that the location didn’t provide an adequate detour route to allow for a more traditional construction project, Gresham Smith and TDOT determined that Accelerated Bridge Construction (ABC)—a process that dramatically reduces construction time as well as long-term inconvenience to motorists—was by far the best solution.
To address concerns associated with the rural location and the use of specialty ABC equipment, we developed an alternate plan set utilizing readily available, traditional construction equipment and precast bridge elements that would allow the bridge to be built during a single-weekend road closure.