Planning board approves Unitil West Concord substation rebuild and pole yard relocation with conditions

Unitil, represented by TF Moran, presented plans to replace vintage substation equipment and relocate a pole storage yard at Tax Map 494 Z Lot 44 in the industrial district. The applicant explained the existing substation dates to mid-20th century vintages and that the rebuilt station will incorporate contemporary equipment, a new grounding grid and updated stormwater controls. Engineers said the new substation footprint would be roughly 22,000 square feet of operational yard and electrical equipment enclosures.

Staff recommended determining the application complete and the board granted waivers to permit completeness and hearing in the same meeting. Following public testimony and technical discussion of screening, gate widths, snow storage, the applicant revised screening proposals for outdoor storage and agreed to widen an entry gate to match turning templates. The board granted conditional use permits for utilities and bluff-buffer disturbance and approved architectural design review as presented. The board then voted to grant major site plan approval subject to precedent and subsequent conditions, including final engineering, utility permits and agreed screening elements.

In discussion, board members emphasized the need for sight lines and coordination with the fire department for winter operations and emergency vehicle access. The applicant noted they would use concrete surfacing for pole storage and a modular pole-bunker detail for safe handling of pole butts and materials. The board recorded the approvals and attached standard precedent conditions and staff-requested clarifications to ensure the design meets city engineering and public-safety requirements.