Tuesday, January 23, 2018


Scope of Work
Cianbro constructed new additions to the existing bascule span piers and erected two, 195 ft, 6 inch lift span towers and a 188 ft x 32 ft lift span over the Thames River.

Project Details
  • Installed 4,760 ft of sheet pile coffer dams
  • Installed 8 – 36 inch diameter end bearing pipe pile augured to rock 180 ft below sea level
  • Placed 77.5 tons of reinforcing steel in the pier extensions
  • Placed 2,382 cy of concrete in the pier extensions
  • Erected two, 980 ton, 195 ft, 6 inch lift span towers
  • Erected a 188 ft x 32 ft, 1,400 ton lift span
  • Constructed 1,250 tons of counterweight steel and concrete for the lift span
  • Fabricated and installed 166 tons of platforms and ladders
  • Installed two, 75 hp electric motors to drive the mechanical lift span
  • Installed four, 16 ft diameter sheaves 
  • Installed four, 7 ft, 6 inch diameter operating drums

Project Awards

Awarded the ABC/CT Excellence in Construction Best in Show

Unique Challenge

Cianbro erected a 1,250 ton lift span on a 100 ft x 140 ft assembly barge. During a 96 hour track outage in the spring of 2008, the existing bascule span was removed from the bridge and the new lift span was floated in and installed.

Project Information


Construction Manager:
The Washington Group, Inc.

Type of Project:

Construction Schedule:
Completed September 2008

New London, CT
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