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
|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.