Another mild winter and early spring reduced the risk of high water or ice in the Kennebec River damaging the pile supported false work for the 300 foot concrete arch and helped keep the project on schedule.
We have completed the rock socket pipe pile supported piers, 135 foot approach spans, pile supported false work for the concrete tie girders and the concrete arch end connection. Our subcontractor designed the false work for the tie girders and provided the construction analysis.
We are on schedule to cast and post tension both upstream and downstream tie girders before the middle of July.
The concrete arch rib spans 300 feet and rises 60 feet above the bridge deck. We plan on casting one concrete arch rib at a time. The shoring for the arch rib provided by AH Harris was design by Symon’s and Gagnon Engineering. When completed the Norridgewock Bridge will be one of two modern concrete tied arch bridges in the United States. (The Depot Street Bridge in the State of Oregon is the other.) The bridge is scheduled to open in the fall of 2011.
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