Saturday, January 20, 2018


Scope of Work
Cianbro rehabilitated the water conveyance system for a 91-year old hydroelectric facility on the Hoosic River.  

Project Details
  • Demolished and removed 560 tons of existing steel pipe 
  • Replaced 1,120 lf of 6 ft diameter penstock and 850 lf of 12.5 ft diameter intake pipe—sections weighting up to 36,000 lbs
  • Excavated and backfilled 17,000 cy of fill on a 45 % slope 
  • Installed new pipeline with a ring girder support system
  • Performed 100 % x-ray on all pipe welds with less than 2 % defects
  • Replaced the bottom 16 ft of a 40 ft diameter, 52 ft tall surge tank
  • Rehabilitated intake cones and replaced 6 ft diameter gate valves
  • Selectively demolished and removed two 93 ft spans of truss bridge without impacting the river environment
  • Treated all demolished steel with a lead abatement process 
  • Drilled and installed relief well system to eliminate artesian water
“Cianbro’s riggers, operators, fitters, welders and crafts people were well trained and dedicated. Their ability to safely work as an efficient team in tough conditions was appreciated by Orion from an owner’s viewpoint.”
Joe Viau,  Project Engineer Reliant Energy

Project Awards

2000 Build America Award

Unique Challenge

The Cianbro team successfully managed difficult site access and rigging challenges by conceiving, designing, and constructing a unique highline crane system, with twin 735-ft, 1¾-inch diameter wire ropes and a traveler system, traversing the mountainous river gorge. Cianbro also completed the fast-track project in six months by solving logistical problems and sequencing construction tasks in response to material supply realities

Project Information

Reliant Energy

Type of Project:
Power Generation & Energy

Construction Schedule:
Completed December 1999

Schaghticoke, NY
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