This project consisted of 115-kV Transmission and 13.8-kV Distribution (T&D) infrastructure extending from a proposed substation to be built on Electric Ave. in Brighton, MA.

The 13.8-kV work commenced at the substation and consisted of electrical ductbank and manhole installation. The 115-kV work included HPFF pipe and conductor installation, freeze pit and tie-in connection to NSTAR’s existing HPFF system, and tie-in to the 115-kV Gas Insulated Switchgear (GIS) at the substation, and requisite testing.

The installation included work in the jurisdictions of the City of Boston/Brighton, Massachusetts Department of Conservation and Recreation (DCR), MassDOT, and the City of Watertown.

By the Numbers

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$31M
Project Value

Scope of Work

115-kV Transmission and 13.8-kV Distribution (T&D) infrastructure extending from a proposed substation, totalling 2.2K LF
The 13.8-kV work commences at the substation and consists of electrical ductbank and manhole installation, totalling 21.9K LF
The 13.8-kV infrastructure will be routed along 5 general routes and broken into 4 separate “Zones”
The 115-kV work includes HPFF pipe and conductor installation, freeze pit and tie-in connection to NSTAR’s existing HPFF system, and tie-in to the 115-kV Gas Insulated Switchgear (GIS) at the substation, and requisite testing
Utility relocation and site restoration

Unique Challenges

With four zones, the 115-kV Transmission and 13.8-kV Distribution (T&D) required close collaboration of work
Restricted working hours while working in the Right of Way