This project performed for the National Railroad Passenger Corporation (Amtrak) consisted of engineering services for structural, mechanical and electrical condition inspection of the existing Connecticut River Bridge a conceptual design study including technical alternatives for rehabilitation or replacement of the bridge was also performed.
The existing bridge, constructed circa 1907, is a two-track, open deck, electrified railroad bridge, 1564 feet long, consisting of seven thru-truss spans, two deck girder spans, and one 158-foot Scherzer-type Rolling Lift span. The bridge carries approximately 35 passenger and six freight trains per weekday. In recent years, the draw span of the bridge has been operated approximately 3,700 times annually to accommodate navigation on the Connecticut River.
Feasible study alternatives for rehabilitation or replacement were determined, and analyzed for estimated costs and comparative benefits as related to the degree to which project needs were met. A set of highly ranked alternatives was selected, termed “Best Solution Study Alternatives”, each providing Amtrak combined advantages of cost and of technical benefits. Estimated construction costs for best solution study alternatives were in excess of $100 million.