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Construction Begins On Last Pier of Bridge

December 24, 2013 Jackson Hole, State of Wyoming, Teton County No Comments
pathway_bridge

Work on the Snake River Pathway Bridge is continuing into January with progress continuing on schedule for a 2014 completion. Cannon Builders Inc. completed construction of the concrete shaft of Pier #3 on the eastern end of the bridge this week, and has started work on the final in-river pier on the west side of the channel. Pier #2 had previously been completed.  Jackson/Teton County Pathways Coordinator Brian Schilling explains that the several month-long process of constructing each of the in-river piers involves driving sixteen sheet piles approximately 30 feet below the river bed to form a coffer dam that provides a below-ground working area for the pier construction. Schilling says after the coffer dam is excavated, nine steel H-piles are driven to a depth of 80’ below the bottom of the coffer dam and a concrete seal cap is poured at the bottom. Each concrete pour requires several days of heated curing. As soon as the concrete shaft is cured, he says the formwork is removed, the coffer dam is backfilled, the sheet piles are removed, and work begins on the next pier. Schilling says the target for completion of the bridge is sometime in the middle of next summer.

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