Overview: Cos Cob Bridge is 1,089-feet long and carries four New Haven Line tracks over the Mianus River in Greenwich, CT. Of the major movable bridges on the New Haven Line, Cos Cob is the busiest. The bridge is comprised of twelve steel spans, with a movable segment at its center that lifts to allow boats to pass below. The bridge was constructed in 1904 and received some rehabilitation in 1989. However, this bridge now requires substantial investment to address challenges caused by aging components and deferred maintenance. ConnDOT has contracted a consultant to perform an engineering feasibility study that is identifying near-term repairs to address service reliability and maintenance issues, as well as long-term alternatives for replacement or rehabilitation. The results of this feasibility study will be complete in summer 2013 and will inform the estimated construction costs for this potential long-term work.