In the Fall of 2016, Linemen from the Power Group wrapped up a project building a new, 2.1-mile-long, 115kV transmission line segment to feed a second transformer at a nearby substation in Lebanon, New Hampshire.  The line is required to support critical loading for a hospital in the Hanover area.

The transmission line was constructed as a redundant feed to the substation and consisted of weathered steel monopole structures with a fiber optic shield wire and new ACSR conductors. The project took seven months and involved two primary subcontractors.

By The Numbers:

  • 16 directly embedded steel pole davit arm suspension structures
  • 1 directly embedded steel pole davit arm restrained suspension structure
  • 5 steel pole davit arm deadend structures on concrete caisson foundations with anchor bolts
  • 3 steel pole deadend pulloff structures on concrete caisson foundations
  • 1 steel pole H-frame deadend load-break switch structure on concrete caisson foundations
  • Approximately 2.1 circuit miles of 954 kcmil 45/7 ACSR “rail” conductor and associated conductor hardware
  • Approximately 2.1 circuit miles of single Brugg, 48 fiber OPGW and associated hardware
  • 5 OPGW splice boxes