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34.5/12.47 kV Substation

Location:
Maine
Completed:
2019

Scope of Work

Cianbro is constructing a new above and below-grade 34.5 kV/12.47 kV substation, built to 69 kV capacity, with a footprint of 183 feet by 169 feet.     

Project Details

  • Performing site development
  • Installing a perimeter fence
  • Pouring 41 cast-in-place foundations containing 330 cubic yards of concrete
  • Installing eight 150-foot ground wells
  • Pulling and terminating yard and control house cables
  • Fitting out the control house
  • Erecting five 69 kV steel bays and three 15 kV steel bays
  • Installing 10 breakers, two capacitor banks, and a 34.5/12 kV transformer
  • Installing 1,900 feet of welded bus pipe
  • Installing 130 flex tap connections
  • Installing 2,100 feet of conduit and duct bank
  • Demolishing the existing substation after the new station is commissioned and energized

Lean, Innovative, and Unique Project Solutions

Throughout construction, the project team focused on incorporating Lean and innovative project solutions to plan the work and improve the work plan. Due to the small footprint of the project site, Cianbro utilized just-in-time (JIT) delivery for materials and equipment. Additionally, the project team utilized a new GEM material for ground wells, that does not require mixing or pumping, which accelerated the installation of the ground wells.