Project Summary

The Kingsley Covered Bridge, built in 1836 is a 121’-0” long single span town lattice truss which carries one-way alternating traffic over the Mill River in the Town of Clarendon, Vermont. The bridge is the only remaining covered bridge in the Town of Clarendon. The bridge has undergone numerous changes and additions throughout its history with various degrees of documentation. Due to its historic and national significance the bridge is currently listed on the National Register of Historic Places, a federal program that is administered by the National Park Service.

A detailed hands-on inspection was performed for bridge members above the deck. Due to the significant height of the bridge over 35’ above Mill River, a small, unmanned aircraft system (sUAS) (i.e. drone) assisted visual inspection was performed for the underside of the deck, floor beams and truss members below the deck. Load rating of the bridge was completed to determine if the bridge can meet the project purpose and need. We prepared a Scoping Report which evaluated 4 rehabilitation alternatives which included maintaining existing load posting of 3 tons to increasing it to 12, 15 and 20 tons. Project stakeholders chose the alternative of rehabilitating the bridge from 12-ton live load posting. Recommended work included replacement of the entire roof and siding, replacement of deteriorated truss members with in-kind dimensions, strengthening of upper bracing system, rehabilitation of existing abutments, and approach roadway improvements. We are in the process of completing the design, construction plans and specifications. The project is scheduled to be constructed in the summer of 2023.