Eagle Substation – Merrimack

Eversource Energy - New Hampshire


The G. Greene Civil & Utility Division completed a 345kV substation expansion. Scope of work included drilled caissons, cast in place concrete foundations, conduit grounding, grading, and fencing.


  • Maintained a tight schedule for the owner
  • Considered site soil conditions and proximity to the river throughout the entirety of the project
  • Maintained access to adjacent 115 kV substation throughout construction
  • Temporary access road for rigging of new transformer from nearby rail line


  • Installed 35 foot shafts for new transmission structures due to proximity of the river
  • Installed over 50 foundations
  • Installed drilled Caisson foundation
  • Installation of 19,000 LF of ground grid
  • Installation of 1,300 LF of cable trench
  • 2.5 acres of finish grading and yard stone
  • Excavated and backfilled for new underground duct banks
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Project at a Glance

Merrimack, NH
Design Team
TRC Engineering

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