Project Overview

The North Quincy Cable Project is the proposed replacement of the 115kV underground electric transmission cables (also known as the 532N and 533N cables) located between National Grid’s North Quincy Substation and National Grid’s Field Street Substation.

In recent years, National Grid has made numerous repairs to this cable system to enable continued delivery of electricity to our customers. The company will also utilize a HDD construction method for cable conduit installation between West Squantum Street and 100 Newport Avenue Extension. Originally installed in 1973, these cables are nearing the end of their service life and need to be replaced.

National Grid is proposing to replace the existing cables with new, modern cables installed within a concrete duct bank, and manhole system. Replacement of these aging cables will improve electric reliability for our area customers, and minimize maintenance and repair costs, providing the capacity to meet growing electric energy needs.

National Grid is committed to actively working with local officials, residents, local businesses in Quincy, the Department of Conservation and Recreation, and the Department of Transportation to solicit feedback and maintain an open dialogue throughout the permitting and route selection process. Permitting began in the spring of 2020. Under our expedited schedule, we expect to begin construction on a small section of the project route during the week of May 24, 2021. The remainder of our work is expected to take place in the summer of 2022. The new cables are expected to go into service by late 2023.

Construction Methods

Horizontal Directional Drilling

Open Trench Excavation

Fact Sheet and FAQs

Project Virtual Open House

Project Map

Project Schedule

Spring 2020


Spring 2020

Stakeholder Outreach

Late-Spring 2021

HDD Construction Start

Summer 2022

Construction Start

Winter 2023

New Cables In-Service