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