Construction - Schedule

Design Phase

The initial design phase began in October 2008 and continued through March 2009. The work during this phase was “behind the scenes” as engineers developed plans and specifications for the new structure as well as acquired permits for the temporary structures necessary to rehabilitate the bridge.

Construction Phase

The construction phase included all of the preparatory work which needed to take place on and off site prior to closing the existing swing span. This phase began in January 2009 with some site preparation and was completed in February 2010. During this phase, crews installed the access trestle and temporary falsework, simultaneously constructed the east and west approach spans adjacent to the old bridge, and erected a replacement swing span off-site.

Closure Phase

The closure phase was an intensive phase with a 24 hour workday schedule. During this phase, crews replaced the east and west approaches, the swing span, approach slabs, and the approach roadway. The new approach spans were pre-fabricated south of the existing structure on temporary bents. During the closure, the existing approach spans were shifted north to temporary bents adjacent to the existing concrete piers, and the new spans were shifted north onto the existing bridge’s reinforced concrete piers.

Demolition Phase

The demolition phase started at the end of February 2010, after the closure phase was completed. During this phase, crews are finalizing construction activities and dismantling the old swing span for removal.