Skip to Main Content Skip to Sitemap


1810 Transmission Line Upgrade Project

Placed in service in December 2016, the 1810 Transmission Line Upgrade Project strengthens the electric system and is providing reliable power to customers in the Bristol and Southington, Conn., area to meet their energy needs.

Work included replacing 14 structures, reinforcing 10 structures, and re-wiring 3.5 miles of transmission line on existing rights-of-way in Bristol and Southington.  In addition, equipment was upgraded at the Southington substation. While the project was placed into service in December of 2016, restoration efforts will continue into the summer of 2017. 


Click Image to Enlarge.

Project Facts:

  • Route length: Approximately 3.5 miles
  • Location: Bristol and Southington, Connecticut
  • Line voltage: 115,000-volt (115-kV) overhead transmission line
  • Substation: Upgrades at the Southington Substation, Belleview Avenue, Southington, Conn.
  • Siting review by: The Connecticut Siting Council (CSC)


  • Connecticut Siting Council (CSC) Petition filing: November 2015
  • CSC Approval: January 25, 2016
  • Start of construction: June 2016
  • Estimated in-service date: December 2016
  • Completion of restoration: Summer 2017

Public Outreach

Beginning with municipal briefings and community outreach efforts related to the 1810 Transmission Line Upgrade Project, we made a concerted effort to engage town officials, residents, businesses, and other stakeholders to inform, answer questions, and listen to concerns about the project. Outreach will continue until restoration is complete.


For more information about the 1810 Transmission Line Upgrade Project, send an email to or call 800-793-2202.