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Moses Wheeler Bridge carries Interstate 95 (Connecticut Turnpike) over the Housatonic River between Stratford and the Devon section of Milford. The bridge is a 34-span plate girder structure with a concrete deck with three 12-foot travel lanes in each direction. The central span over the river's navigation channel includes a ship-lap assembly, which are no longer used in bridge construction. Construction on the Moses Wheeler Bridge began in 1955 and opened on January 2, 1958. ==Ongoing replacement== Heavy traffic and harsh New England weather have taken their toll on the Moses Wheeler Bridge. It has been rated as 'structurally deficient' during recent inspections, with accelerating deterioration of the structural steel being of particular concern. The Connecticut Department of Transportation (CONNDOT) began drawing up plans to replace the bridge in 1996. Originally CONNDOT planned to construct the new bridge to the south of the existing one, away from 115 kilovolt high tension wires that run atop the nearby Metro-North Railroad Drawridge. Stratford residents and officials demanded the new bridge be built to the north of the existing span, closer to the Metro-North bridge and the power lines. A compromise was reached where the new bridge will use approximately the same alignment as the existing one, though be substantially wider. To make this possible, the project will be completed in three stages: the first two stages will consist of constructing the outer parts of the new bridge that will eventually carry two outer lanes and the outer shoulder, while three lanes of traffic are maintained on the existing bridge. During the final stage of construction, three lanes of traffic will be shifted to the new outer spans, at which point crews will demolish the existing span and complete the center portion of the new bridge. The new bridge will accommodate three (expandable to four) lanes in each direction with full left and right shoulders. Two design options were developed for the new 14-span structure: one option using segmented concrete hollow box girders, and the other using continuous steel plate girders. The bridge is designed for seismic loading to withstand a major earthquake. Additionally, it will include a fender system to protect the bridge piers from ship collisions. Aesthetic features are also included, among which is encasing the bridge piers with decorative granite and aesthetic lighting. The STV Group designed the replacement bridge.〔(Moses Wheeler Bridge Replacement Project by STV )〕 The existing bridge has no shoulders. Environmental studies for the new bridge were completed in 2005, and CONNDOT awarded a $60 million contract to Torrington, Connecticut-based O&G Industries for the initial phase of work in July 2009. Construction on the first phase of replacing the bridge, including the foundations for the new bridge piers and temporary work trusses in the Housatonic River began in September 2009. The $166.5 million contract that will build the remainder of the new bridge and demolish the existing span was awarded to a joint venture between Chicago, Illinois-based Walsh Construction Company and Denver, Colorado-based PCL Constructors (also referred to in contract documents as Walsh/PCL Joint Venture II) in August 2011, and will pursue the option using the continuous steel plate girder design. Walsh/PCL commenced work to widen I-95 on the east and west approaches and began erecting the bridge piers for the new Moses Wheeler Bridge in September 2011. Crews shifted I-95 traffic to the southern half of the roadway so the northern half of the highway, including several smaller overspasses could rebuilt and expanded. On January 17, 2013, southbound traffic was shifted onto the completed northern third of the new bridge and approaches. Northbound traffic was shifted onto the former southbound lanes of the old bridge on January 26, 2013. The Walsh-PCL contrsuction team began demolishing the northbound portion of the old bridge and approaches in February 2013. Demolition of the old northbound span was completed in May 2013, and crews began erecting structural steel for the new northbound lanes in June 2013. In December 2013, northbound traffic was shifted from the old bridge to the new northbound lanes, at which point the remainder of the original 1958 structure was taken out of service and removed. During the summer of 2014, three large gantry cranes were assembled in the median of I-95 to enable construction of the center portion of the new span. By the end of 2015,construction of the new Moses Wheeler Bridge is expected to reach substantial completion, with final paving and striping scheduled for 2016. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Moses Wheeler Bridge」の詳細全文を読む スポンサード リンク
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