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Vol. XlIX • No. 5
“The Nation’s Best Read Construction Newspaper… Founded in 1957.” Your New England States Connection • Kent Hogeboom 1-800-988-1203
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The existing bridges will be removed and new structures will then be set into place.
ConnDOT, Northern Construction Join to Replace Heavily Traveled Spans By Jay Adams CEG CORRESPONDENT
The Connecticut Department of Transportation (ConnDOT) and Northern Construction Service LLC are combining to replace two heavily traveled highway bridges that are central arteries for all state commuters in two directions. They expect to do it in less than eight months. The physical work to replace the Interstate 84 east and west bridges over Marion Avenue in the town of Southington began the first week in November. Northern Construction Service in Palmer, Mass. is the general contractor under the auspices of ConnDOT for the $6 million project. It was awarded to Northern on June 7 with a scheduled completion date of July 2014. The brisk November to July timetable is possible because the state is utilizing accelerated bridge construction methods that employ innovative, time saving techniques and minimize construction time and the disturbance to the traveling public. Coupled with incentive bonuses (and late penalties) to meet state highway deadlines, there is even more encouragement to stay on schedule. The department’s office of construction is administering the project; District 1 Rocky Hill, Conn. It consists of the superstructure replacement of Bridge Nos. 01235 and 01236, which carry Interstate 84 through Southington.
Prefab Is Fab and Fast The new superstructures will be prefabricated on site in staging areas adjacent to the bridges. Interstate 84 mainline and Marion Avenue traffic will remain open during the entire prefabrication period using only temporary lane closures for other work associated with the bridge work. According to Shawn Clark, Northern Construction Service project manager, tree clearing began on Nov. 6 of both the east and west staging areas, accompanied by the continuance of utility relocations that have been ongoing for several months. Clark said that excavation work for both staging areas began on site on Nov. 18. Approximately 10,000 cu. yds. (7,645.5 cu m) of excavation is required to bring the two staging areas to a flat grade so that the new bridges can be constructed in each of these areas on temporary bridge abutment supports. According to ConnDOT, the bridges were constructed in 1963 with some rehabilitation work performed in 1995. Deterioration is typical for these 50-year-old bridges, but its foundation is solid. The spans have weakened, but the abutments are in good condition. Some 83,800 vehicles per day on average cross the highways, based on a study completed in 2008. This includes both eastbound and westbound totals. There are three lanes see I-84 page 4