Saturday, January 20, 2018


Scope of Work
Cianbro is rehabilitating the structural steel, electrical, machinery, control house systems and realignment of the Mystic River Bascule Bridge, originally built in 1922.

Project Details
  • Blasting, cleaning, repairing and painting the structural steel
  • Jacking the counterweights to realign the counterweight truss
  • Replacing the counterweight trunnion bearings
  • Replacing the electrical systems including the main drive motors braking systems, controls, lighting, traffic signals, gates, and installing a stand-by generator
  • Replacing the drive machinery and realigning the main pinion and bull wheel bearings
  • Replacing the control house and the adjoining shed and motor houses
  • Removing and replacing 320 ft of submarine cable
  • Upgrading the fender system and installing scour monitor devices
  • Replacing the bridge railing on the east span and extending to the approaches on the north and south sides of the road
  • Repairing the stone wall and east abutment

Unique Challenge

The bridge is located within a historical downtown vacation destination. The rehabilitation of the bridge is being completed concurrently with and adjacent to a major streetscape expansion project. The bridge rehabilitation is phased over the course of three winters in an effort minimize any disruption to tourist season(s).

Project Information

Connecticut Department of Transportation

Type of Project:

Construction Schedule:
Start: December 2010
Complete: May 2013

Mystic, CT

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