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Two workers in safety gear inspect and work around an open manhole on a grassy area beside a pavement.

Brant Hills Cable Injection Pilot

Home Capital Projects Brant Hills Cable Injection Pilot

2387 Sinclair Circle, Burlington, Ontario L7P 3C2 2025

Brant Hills Cable Injection Pilot

Exploring Innovative Ways to Strengthen Underground Cable Reliability

Burlington Hydro completed a cable injection pilot project in the Brant Hills neighbourhood to evaluate an innovative approach to improving the performance of aging underground cables. The pilot focused on extending asset life, strengthening reliability, and informing future infrastructure planning.

Two workers in safety gear inspect and work around an open manhole on a grassy area beside a pavement.

Project Overview

Cable injection is a targeted rehabilitation technique that repairs existing underground cable insulation rather than replacing the cable entirely. Through this pilot, Burlington Hydro assessed whether cable injection could improve reliability and delay the need for full cable replacement in select areas of the Brant Hills subdivision. 

Approximately 4,980 metres of underground cable were treated as part of this pilot, within a defined target area identified through prior condition assessment and testing. The project supports Burlington Hydro’s broader strategy of using data-driven and cost-effective approaches to maintain a safe and resilient electricity system.

Exploring Innovative Ways to Strengthen Underground Cable Reliability

Exploring Innovative Ways to Strengthen Underground Cable Reliability

What Is Cable Injection?

Cable injection is a rehabilitation method that involves injecting a specialized insulating fluid into underground electrical cables. The fluid fills microscopic voids and defects within the cable insulation, helping to reduce the risk of electrical failure and improve overall cable performance. 

This technique allows Burlington Hydro to address deterioration within existing cables while minimizing excavation, surface disruption, and construction impacts to the neighbourhood.

Why Brant Hills?

The Brant Hills neighbourhood includes underground electrical infrastructure that has been in service for several decades. Previous testing and condition assessments identified sections of cable that could benefit from rehabilitation. 

By piloting cable injection in Brant Hills, Burlington Hydro was able to evaluate how this approach performs in a realworld residential setting and determine whether it could be applied more broadly across the system.

What Work Was Completed?

As part of the pilot, Burlington Hydro: 

  • Treated approximately 4,980 metres of underground cable using cable injection techniques 
  • Focused work within a defined target area of the Brant Hills subdivision 
  • Completed all work with minimal surface disruption and localized impacts 
  • Monitored system performance following treatment to evaluate effectiveness 

The findings from this pilot will help guide future decisions about underground cable rehabilitation and replacement programs.

Project Area

Cable injection work was completed within a targeted portion of the Brant Hills subdivision.

A map showing a residential neighbourhood with curving roads, cul-de-sacs, and a major motorway running vertically on the right.

By piloting cable injection in Brant Hills, Burlington Hydro is exploring innovative, responsible ways to maintain underground infrastructure, improve reliability, and make thoughtful investments in the electricity system that supports a growing, electrifying community. This work reflects our commitment to stewardship, reliability, and planning for Burlington’s future.