Greater Hartford - Central Connecticut Reliability Project

Eversource is proposing to construct a new 115-kilovolt (kV) transmission line in the Greater Hartford and central Connecticut area. These improvements will strengthen our system and ensure customers have reliable power to meet their energy needs, in keeping with national and regional reliability standards.

The 3.8-mile underground line would be constructed between our Newington Substation in Newington, Connecticut, and our Southwest Hartford Substation in Hartford, passing through portions of Newington, West Hartford and Hartford.

To improve system reliability, cost-effectiveness and the environment, we will also be upgrading our Newington and Southwest Hartford substations with new equipment. The project will also allow power to be redirected - for example north to south - during times of high customer demand.

Greater Hartford - Central Connecticut Reliability Project Map

Project Facts:

  • Route length:  Approximately 3.8 miles
  • Line Location: Newington, West Hartford and Hartford, Connecticut
  • Line voltage:  115,000-volt (115-kV) underground transmission line
  • Substations: Substation upgrades at Newington Substation in Newington, Southwest Hartford Substation in Hartford, and related upgrades at the Berlin Substation in Berlin.
  • Siting review by: The Connecticut Siting Council (CSC)

 Estimated Timetable (Subject to Change):

  • ​​Municipal Consultation Filing (MCF): December 1​8, 2015
  • Public ​open ​house: January 20, 2016
  • Connecticut Siting Council (CSC) Application ​filing: Second Quarter 2017
  • CSC Public Hearing: To be determined (set by the CSC)
  • CSC ​decision: ​Second Quarter 2018
  • If ​approved, ​submit Development & Management Plan to CSC ​for ​approval: ​Second Quarter 2018
  • Start of ​construction (pending all necessary approvals): Second Quarter 2018
  • Estimated ​in-​service ​date: ​Mid-2019

Regional Open House

A regional open house was held on January 20, 2016, at the Elmwood Community Center in West Hartford. The open house gave local residents and business owners an opportunity to learn more about the project, ask questions, and provide comments on the proposed project with subject matter experts from Eversource.

Connecticut Siting Council

Involving the public and municipal leaders is an important part of the project’s planning process. For an electric transmission line project, such as the Greater Hartford - Central Connecticut Reliability Project, the Municipal Consultation and Application Filing phases are part of the regulatory review process, as defined by the Connecticut state statutes.

The statutes require that an applicant for a new electric transmission line provide certain information on the proposed project to municipal officials in communities affected by the proposed transmission route, and to seek input from each municipality before the filing of an application.

To learn more about the siting process, visit the CSC website.

CSC Application

Eversource plans to submit an Application to the CSC in the ​second quarter of 2017, seeking a “Certificate of Environmental Compatibility and Public Need” for this project. 

Municipal Consultation Filing

The Municipal Consultation Filing (MCF) was submitted to the towns of Berlin, Newington and West Hartford, and the city of Hartford, on December 1​8, 2015.  The MCF provides information concerning the Project including the public need, site selection process, maps, analyses of alternate sites/routes, schedule and environmental effects of the proposed project.

In order to facilitate the MCF process, Eversource offers to meet with the chief elected and other officials of each affected municipality to explain the proposed project and provide information on the proposed project route, including the route selection process and the environmental effects, among others.

The filing consists of three volumes. Please note some of the volumes are large and might take some time to load or download.

Contact Information

For more information about the Greater Hartford - Central Connecticut Reliability Project, send an email to or call 800-793-2202.