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Project logoProject Description: Stamford Reliability Cable Project

Stamford Cable Map
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CL&P has completed construction of a new 115-kilovolt (kV) underground transmission line in Stamford, Conn. The Stamford Reliability Cable Project extends approximately 1.5 miles between two existing CL&P substations, the Glenbrook Substation on Lincoln Avenue and the South End Substation on Pacific Street.

This project is now improving the transmission system in the Stamford area so customers will have reliable electric power to meet their growing energy needs. It will also ensure that the area’s electric grid conforms to national and regional reliability standards.

Keeping the lines of communication open is an important part of our work in your community. For information about project construction activities in Stamford , click here.

Stamford Reliability Cable Project Facts

Route Length:Approx. 1.5 miles, underground
Location:Stamford, Conn.
Line voltage:115,000 volts (115-kV)
Regulatory review by: The Connecticut Siting Council (CSC), Connecticut Department of Transportation, Metro-North Railroad, Connecticut Public Utilities Regulatory Authority
  • Municipal Consultation Filing – Third quarter 2012
  • CSC application filing – January 18, 2013
  • CSC Decision and Order approval issued – September 12, 2013
  • Development and Management Plan approved by the CSC - December 12, 2013
  • Construction began – March 2014
  • Construction completed and project energized - November 2014
Connecticut Siting Council issues its Decision and Order

On September 12, 2013, the Connecticut Siting Council (CSC) issued its Decision and Order (D&O) approving CL&P’s application to construct the Stamford Reliability Cable Project.

Read the CSC Decision and Order and the related Opinion. PDF(2466KB)

The CSC conducted a field review of the proposed routes on March 28, 2013, and a local public hearing. Read more about CL&P's Filings to the CSC in the Development and Management (D&M) Plan section, below, and on the Historical Information page.

Development and Management (D&M) Plan – Overview and Background

As the next step in the Connecticut siting process, CL&P prepared the required construction plan, called the Development and Management (D&M) Plan, for the Stamford Reliability Cable Project. The D&M Plan, approved by the CSC on December 12, 2013, is a detailed construction document. It includes, among other information, the location of the underground transmission line; soil handling plan; erosion and sediment control plan; and details of the duct bank and splice vault installation.

Below is the approved Stamford Reliability Cable Project D&M Plan:

Volume I – D&M Plan - Glenbrook and South End Substations

Volume II – D&M Plan – 115-kilovolt (kV) Underground Transmission Line
Volume II – Appendix A - Exhibit 1 – Stamford Site Location Map
Volume II – Appendix A – Exhibit 2 – Stamford Preferred Route Aerial Mapping
Volume II – Appendix A – Exhibit 3 – Stamford Plan and Profile and Detail Drawings
Volume II – Appendix A – Exhibit 4 – Sediment and Erosion Control Figures-Part 1
Volume II – Appendix A – Exhibit 4 – Sediment and Erosion Control Figures-Part 2
Volume II – Appendix A – Exhibit 4 – Sediment and Erosion Control Figures-Part 3
Volume II – Appendix A – Exhibit 4 – Sediment and Erosion Control Figures-Part 4
Volume II – Appendix A – Exhibit 5 – Pavement Restoration Plan

Volume III – D&M Plan – General Appendices
Volume III – Appendix A – Docket No. 435 Decision and Order
Volume III – Appendix B – Northeast Utilities’ Construction and Maintenance Environmental Requirements - Best Management Practices Manual
Volume III – Appendix C – Spill Prevention and Countermeasures Plan
Volume III – Appendix D – Soil Handling and Dewatering Plan
Volume III – Appendix E – Snow Removal and De-Icing Procedures
Volume III – Appendix F – Post-Construction Electric and Magnetic Field Monitoring Plan
Volume III – Appendix G – City of Stamford Comments on D&M Plan

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