Derby-Milford Road Bridge
Replacement of the Derby-Milford Road Bridge, Litchfield, CT
Cardinal Engineering provided complete engineering services for this project, which included design, contract administration, and resident engineering services.
Derby-Milford road is a heavily traveled arterial roadway, which provides a vital connection between State Routes 121 and 34. The existing bridge, constructed in 1949, consisted of two simple steel and concrete spans which were in poor condition, and were supported by concrete abutments and center pier on shallow foundations – it was rated scour critical.
The replacement structure consists of an 82-foot span with a superstructure of precast box beams with full-height abutments supported on mini-piles drilled into bedrock. Design of the relocation of a 12” water main was also required. Coordination with CTDOT was required due to the close proximity of the bridge to the intersection of Grassy Hill Road (State Rte. 121). A detailed detour plan, which included traffic signal adjustments, was required to maintain the heavily traveled arterial roadway. Cardinal also prepared the initial State Local Bridge Program funding application for this project.
Project Completion: 2019 / Project Cost: $2,300,000