hanna group, engineering firm sacramento, construction management sacramento, project management sacramento, bridge construction sacramento, interchange construction
  • hanna group, engineering firm sacramento, construction management sacramento, project management sacramento, bridge construction sacramento, interchange construction
  • hanna group, engineering firm sacramento, construction management sacramento, project management sacramento, bridge construction sacramento, interchange construction
  • hanna group, engineering firm sacramento, construction management sacramento, project management sacramento, bridge construction sacramento, interchange construction
  • hanna group, engineering firm sacramento, construction management sacramento, project management sacramento, bridge construction sacramento, interchange construction
Clients / City of Petaluma

Project Dates: September 2007 – January 2009
Project Costs: Construction Cost $1,850,000

The Project consisted of removing and replacing the Trunuion Pin and Bearing assemblies for this existing bascule (draw) bridge built in 1933. The entire bridge was also completely blast cleaned and repainted as part of this project.

Caltrans Maintenance and Investigations inspected this bridge in 2003 and determined that the existing bearing and pin assemblies were worn out and needed to be replaced. The Project entailed closing the bridge to all traffic for 40 calendar days while the new assemblies were installed and the bridge was painted. This necessitated an around the clock work schedule. Items of work included removing portions of the existing bridge to facilitate bearing installation, high strength bolting, blasting and painting, methacrylate, concrete shoe repairs, bridge balancing, striping and electrical upgrades.

In addition to the technical items on this project, the project team was tasked with community outreach efforts associated with shutting down vehicle and pedestrian access over this bridge which represents one of only three Petaluma River crossing points and ensuring compliance with all permits associated with the river crossing.

THG dealt with technical challenges including existing bridge members that varied significantly from the as-built drawings and a significant space constraints. In spite of these obstacles, THG brought this project to completion ahead of schedule and within the allotted project budget.

THG’s scope of work consisted of providing full Construction Management services including but not limited to the following:

  • Resident Engineering
  • Inspection
  • Constructability Review
  • CPM Schedule Review
  • Design Changes
  • Coatings Inspection