I-95 New Haven Harbor Crossing Corridor Improvements – Contract C2

O&G completed this project nearly one year ahead of schedule. This project encompassed approximately one mile of I-95 in New Haven. Additional lanes, full shoulders, and a new median barrier were constructed by O&G in both directions, along with new drainage, signage, and lighting. O&G was responsible for seven bridge structures which were either constructed or reconstructed, as well as three pre-cast retaining walls spanning over 2500 ft in length and 54,000 SF of surface area. One of these modular walls was the result of a value engineering proposal with the Department to substitute a Modular Doublewall system for a proposed cast-in-place retaining wall (approximately 37,000SF) which reduced the cutback amount and lowered the previous backfill as well as structure earth and rock excavation required. Much of the project’s widening involved large 30-foot cuts on the east end of the project and an equally large embankment area on the west end to accommodate new on and off ramps as well as a large sedimentation basin for the new drainage system. The large cut-and-fill areas, coupled with limited available land area, necessitated the use of pre-cast retaining wall systems. A special architectural treatment was used on this project resulting in a distinctive look, not present on most highway projects. Utility work including, electrical, signal work, telephone and data lines, sewer lines, and water line work was required as well as public coordination. A new drainage outfall area was created in New Haven Harbor necessitating the use of sheet piling, tremie poured concrete and significant dewatering. This work was done in an easement area near 1 million-gallon fuel oil storage tanks and buried fuel transmission lines.