wildfire mitigation plan - california public utilities commission · 2019-02-13 · wildfire...
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Wildfire
Mitigation PlanBrief to California Public Utilities Commission
13 February 2019
Ismael Bills – Vice President of Operations
Lenneal Gardner – Corporate Counsel
Collin Sullivan – Director of Engineering
• Mission and Commitment
• Objectives
• Overview of TBC Facilities
• Risk Assessment
• Actions & Mitigations
Agenda
To provide a safe and reliable source of electrical transmission for the City of San Francisco while maintaining
the highest ethical standards and providing a rewarding environment for employees, investors, and stakeholders.
TBC’s commitment to safety and reliability reflects our respect for the impact our business has on the Bay Area
community.
TBC Mission & Commitment
Upcoming 2019 Wildfire Season
• Enhance fire awareness, prevention, and training for staff
• Comprehensive assessment of fire monitoring and awareness systems
• Continued planning for seismic hardening projects
Prior to Next Plan Filing
• Implementation of identified system upgrades
• Implementation of mitigants identified in WMP Risk Assessment
Next 5 Years
• All potential fire risks identified fully mitigated
Objectives
•Overall System
•Pittsburg Converter Station
•Potrero Converter Station
Overview of TBC Facilities
Overall System
Potrero Converter
Station
115kV
Pittsburg Converter
Station
230kV
Submarine HVDC
Cable
200kV
Potrero Converter Station
TBC Potrero
Converter Station
115kV
PG&E
115kV
“Substation A”
115kV AC Cable
Duct Bank
115kV AC Cable
in Underground
Duct Bank
200kV DC Cable
in Underground
Duct Bank
200kV DC Cable
Underground
Horizontal
Directional Drilled
Conduit
200kV DC
Submarine
Cable
City of
San Francisco
Overhead ViewInfrastructure Elements
Pittsburg Converter Station
200kV DC
Submarine Cable200kV DC Cable
Underground
Horizontal Directional
Drilled Conduit
200kV DC Cable in
Underground Duct Bank
TBC Pittsburg
Converter Station
230kV
City of Pittsburg
PG&E
115kV
Pittsburg
Substation
230kV AC Cable in
Underground
Duct Bank
Overhead ViewInfrastructure Elements
•Bay Area Wildfire Risk Assessment
•Consequence Rating
•Modalities of Risk Realization
Risk Assessment
Bay Area Wildfire Risk Assessment
Tier 2
Elevated
Tier 3
Extreme
CPUC Bay Area Fire Map
CAL FIRE
Fire Resource Assessment Program
Bay Area Communities
at Risk from Wildfire
Extremely Severe• Catastrophic and wide spread damage to wildlands and bordering communities
• High potential for loss of life
• Significant long-term health effects attributable to fire
• Extensive Destruction of private and public property
• Damage exceeding $100 million
• Extended periods of outage to achieve restoration
Consequence Rating
• Ignition of vegetative fuels proximate to Pittsburg Converter Station
• Seismic events leading to equipment derangement
• Derangement of infrastructure from uncoordinated excavation
Modalities of Risk Realization
Ignition of Proximate Vegetative Fuels
Proximate
Vegetative
Fuels
TBC Pittsburg
Converter Station
Ignition of Proximate Vegetative Fuels
TBC Pittsburg
Converter Station
Main Transformers
Fire Lane
12 ft Concrete Wall
Proximate
Vegetative Fuels TBC Pittsburg
Converter Station Nearby
Residential
Community
Seismic Event Leading to Fire
Derangement from Uncoordinated Excavation
• Continue with program of seismic hardening
• Assess implementation of additional fire suppression systems
• Implement real-time cable monitoring system
• Third-party review of fire prevention measures
Actions & Mitigations
Questions
&
Answers
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