1. Resiliency and Reliability
Electric Transmission & Distribution
Virginia Municipal League 
July 21, 2017
Brett Crable, Director
New Technology & Energy Conservation

2. Dominion Energy Profile Primary Operating Segments
Power Delivery
Group
Gas Infrastructure
Group
Power Generation
Group
Electric Transmission
6,600 miles of transmission lines
Favorable regulatory environment
Electric Distribution
57,600 miles of distribution lines
2.6 million franchise retail customer accounts in VA and NC
Gas Transmission
Together with Gas Distribution, operates one of the largest natural gas storage system in the U.S.
15,000 miles of pipeline in eleven states
Cove Point LNG import facility
Well positioned in Marcellus and Utica Shale regions
Gas Distribution
51,300 miles of distribution pipeline and 2.3 million natural gas customer accounts in five states
Dominion Energy Solutions
Utility Generation
21,500 MW of capacity
Balanced, diverse fuel mix
Favorable regulatory environment
Merchant Generation
4,700 MW of capacity, including nuclear, gas and renewable power
Active hedging program for energy revenue/margins

3. Safe and Reliable Energy

4. Committed to Working Safely
OSHA Recordable Incident Rate
1.69
RD/LD Recordable Incident Rate
* Dominion incidents rate = number of recordables x 200,000/man-hours worked

5. Distribution Reliability Sustained Improvement
Three-year rolling average minutes without service for customers
has declined nearly 20 percent since 2006
Active weather year in 2016 drove increase; weather-related days were up 67 percent over the previous three years
SAIDI – Average Minutes Out per Customer, Excluding Major Events, Three-Year Rolling Average
Source: Dominion Energy Virginia

6. Distribution Reliability Programs Asset Upgrades & Technology
Rebuild circuits to new standards
Replace end of life equipment:
Cable
Poles
Switches
Transformers
Wire
Technology
Automation
Thermal scans
Grid devices

7. Distribution Reliability Strategic Underground Program
Program Benefits:
Decreased outage locations
Significant reduction in restoration times for all customers
Designed to convert ~4,000 miles of most outage prone distribution tap lines to underground to improve reliability and storm resiliency
Accomplishments to date:
Over 550 miles of overhead outage prone lines converted to underground
1,650 tap lines converted

8. Electric Transmission Reliability
Source: Dominion Energy Virginia

9. Electric Transmission Forces Driving Infrastructure Need
Economic Growth
Dominion – fastest growing area in PJM
Government agencies, military installations, data centers, etc.
20,000-30,000 new customers annually
$4 billion assets in service
6,600 transmission miles / 45,000 structures
800+ substations
First 500kV electric transmission loop in North America; built in 1960s
60% of our system was built prior to 1980
Aging Power Grid Assets
Transmission system is always changing – new/retired generation, new/rebuilt transmission lines, new customers, etc.
Transmission load flow is constantly modeled to ensure reliability
New projects essential to resolve issues
Addressing Mandatory NERC Criteria Standards

10. Electric Transmission Major Projects for 2017-2021
Customer Driven
Aging Infrastructure
Yardley Ridge/ Poland Road
Cunningham-Dooms
Cunningham-Elmont
Warrenton-Wheeler-Gainesville
Norris Bridge
Haymarket
NERC Reliability Criteria
Idylwood-Tysons
Glebe-Potomac River
Remington-Gordonsville
Skiffes Creek 1 2 3 5 4 6 7 8 10 9

11. Physical Security Functioning Decision Center
Event and Information Analysis
Threat Management & Countermeasures
24 x 7 Monitoring and Management
Rapid Integrated Response
Common Operating Picture
Time is Mitigation
Interface with State and Local Government Agencies

12. Cyber Security Cyber Mutual Assistance 93 Utilities
Voluntary sharing of equipment, resources and knowledge
Enterprise level
PCs, mainframe, application software
Systems controls in field
Multiple industry associations share

13. Visit our website at www.dominionenergy.com