North Road Extension Bridge Replacement

Replacement of the North Road Extension Bridge, Cromwell, CT

Cardinal Engineering Associates provided all engineering services required for the design of the replacement of this bridge which is funded under the Federal Local Bridge Program. Cardinal also provided contract administration and full-time resident engineering services.

North Road Extension is located in the western part of the Town of Cromwell. The existing bridge, built in 1980, was a twin corrugated metal arch culvert with cast-in-place concrete headwalls and wingwalls. The total length of the existing structure was approximately 25ft. The North Road Extension Bridge was in poor structural condition. A 3-sided Rigid Frame Box Culvert on concrete spread footings was proposed to replace the existing arches. The clear span of the new rigid frame structure is 28 feet. The concrete footings were set on concrete sub-footings founded on sound bedrock.

The project also included channel and embankment improvements and the elimination of a stone weir immediately downstream of the project to improve hydraulic conditions. Roadway improvements included maintaining a constant roadway width of 28 feet, construction of a five-foot sidewalk, installation of roadside safety elements and relocation of overhead utilities.

An existing eight-inch gas distribution line and an existing high pressure 36-inch gas transmission line located within the roadway were supported and protected during construction.

Project Completion: 2020 / Project Cost: $2,000,000