System hardening initiatives strengthen assets to reduce the chances of them causing ignitions and protecting against extreme weather conditions. Risk modeling determines potential methods of failure; then, repair and replace programs prevent and fix defects. We’re also implementing new technologies to help in the mitigation of risks. While it’s impossible to eliminate every risk, we continue to maintain and upgrade our system and collaborate with other utilities to protect people and property.

Our work in this area includes:

  • Accelerating inspections of assets in the Wildfire Risk Zones, as well as conducting new and enhanced inspections on equipment to determine potential areas of concern.
  • Replacing equipment and poles with identifiable areas of concern, along with replacing equipment known to create sparks with new, safer technology.
  • Analyzing the strength and ability of both transmission and distribution structures to withstand higher than normal wind speeds.
  • Conducting enhanced vegetation management in the areas around company assets.

Read about our accomplishments and planned work in the table below.

Work Completed and Planned

2019-20202021+
Visually inspected 100% (2,900 miles) of transmission line in Wildfire Risk Zone by ground and aerial patrol for higher-voltage lines (over 200 kilovolt)

Inspected 125,000 distribution wood poles

Inspected high-risk distribution feeders
Inspect 100% (2,900 miles) of transmission line in Wildfire Risk Zone annually

Continue intrusive wood pole ground line inspections and assessments of transmission lines

10,000+ distribution pole inspections using drones
 
Continue data collection to analyze pole integrity and necessary vegetation clearance
Replaced 2,300 distribution wood poles in 2019 and 3,700 poles in 2020

Corrected nearly 300 transmission defects

Upgraded fuses and lightning arrestors
Replace 4,500 distribution poles in 2021 and nearly 15,500 distribution poles by 2025

Replace fuses with devices that eliminate sparks during fuse operation

Continue to correct transmission defects as they are identified

Continue design work to support the planned rebuild of 195 miles of transmission line in the next 5 years

Reconductor 300 miles of distribution feeder in Wildfire Risk Zones
Initiated substation relay upgrades

Performed a wind strength analysis of transmission and distribution structures
Ongoing substation relay upgrades that will allow for earlier fault detection

Perform a wind strength analysis of distribution structures
Removed or mitigated hazard trees and vegetation from 20 circuits

Created defensible space around 1,500 distribution poles
Continue hazard tree removal and creation of defensible space around poles

Convert right-of-way vegetation types near transmission lines

Create defensible space around 4,000 distribution poles

Read more about our Wildfire Mitigation Plan.