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The Capital Grid Project: Building Tomorrow’s Energy Grid Today October 2, 2017 Lamond- Riggs Citizens Association
The Capital Grid Project:
Building Tomorrow’s Energy Grid Today
October 2, 2017
Lamond- Riggs Citizens Association
2
Agenda
Welcome
How Safe, Clean, and Affordable Energy is Delivered
Our Current System
The Need: Enhancing Reliability and Resiliency
The Capital Grid Project Overview
• Building a Networked System
• Constructing a New Substation
• Upgrading and Replacing Aging Infrastructure
Capital Grid Project Benefits
Next Steps
3
How Energy is Delivered to You
4
The Current System
Since retiring generation facilities in
the District, we rely on the
transmission system to deliver
energy produced outside of the city
All of the energy supplied to the
District is imported from outside of
the city via radial or point-to-point
transmission lines
Four corridors of transmission lines
are supplying energy to the Capital
area, including Prince George’s and
Montgomery Counties
Entire areas of the Capital area are
currently fed by single pathways of
electric supply, which can lead to
outages if a pathway is temporarily
lost
The loss of any one of these
corridors could take several days to
several weeks to restore
This map animation is for illustration purposes only and does not reflect exact corridor locations or service area.
The Current System
The loss of any one of these four corridors could result in a significant loss of load, and could take as much as several days or even several weeks to repair, depending on the nature of the damage
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The Need: Enhancing Reliability and Resiliency
Reliability and resiliency of the electric system are essential to:
• Prevent service disruptions through infrastructure and equipment
upgrades, underground transmission lines and state-of-the-art substation
designs
• Respond quickly to disruptions when they occur by rerouting power
through integrated, alternate pathways
Disruptions to a power path usually happen due to:
• A storm or other weather-related event
• A failure due to aging infrastructure or underground equipment
• An event related to increased demand from new commercial and mixed-
use development
• Intentional or unintentional physical damage to overhead facilities, such
as vandalism or a vehicle accident
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The Solution: A Forward-Looking Plan
The Capital Grid project will solve a number of current needs with
one integrated solution by:
• Building a networked system of substations by installing approximately
10 miles of new underground transmission cable
• Constructing a new substation to meet increasing demand in
neighborhoods experiencing rapid growth
• Upgrading and replacing aging infrastructure and equipment to
enhance reliability
Building a
Networked
System
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Building a Networked System:
Improving Reliability and Resiliency
The Capital Grid project will create
multiple pathways of power supply to
connect multiple substations in the
Capital area with higher electrical load
capacity
The project proposes a “networked
system” to deliver electricity faster to
areas experiencing an outage and
lessen the impact from severe weather
or other unexpected events
Networking the Capital area electric
system will create a more reliable and
resilient grid to provide capacity
expansion to support demand
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The Capital Grid Project: 10-Mile
Transmission Route
CHAMPLAIN SUBSTATION *
HARVARD SUBSTATION *
MT. VERNON SUBSTATION *
WATERFRONT SUBSTATION *
TAKOMA SUBSTATION *
T STREET NW
4TH
STR
EET
NW
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Ward 4 - Overview
* TAKOMA SUBSTATION
HARVARD SUBSTATION *
Ward 4 – Zoomed In
Ward 4 – Zoomed In (Cont’d)
Ward 4 – Zoomed In (Cont’d)
Ward 4 – Zoomed In (Cont’d)
Ward 4 – Spring/Summer 2018
Spring/Summer 2018 - 1 location
0.45 miles of civil construction
Civil Construction
• Temporary Traffic Control
• Closure of 2 lanes
• Trenching
• Temporary Steel Plates
• Installation of ductbank
• Installation of manholes
• Backfilling
• Temporary Restoration
• Permanent Restoration
* TAKOMA SUBSTATION
HARVARD SUBSTATION *
Ward 4 – Fall 2018/Winter 2019
Fall 2018/Winter 2019 - 2 locations
0.9 miles of civil construction
Civil Construction
• Temporary Traffic Control
• Closure of 2 lanes
• Trenching
• Temporary Steel Plates
• Installation of ductbank
• Installation of manholes
• Backfilling
• Temporary Restoration
• Permanent Restoration
* TAKOMA SUBSTATION
HARVARD SUBSTATION *
Ward 4 – Spring/Summer 2019
Spring/Summer 2019 - 1 location
0.45 miles of civil construction
Civil Construction
• Temporary Traffic Control
• Closure of 2 lanes
• Trenching
• Temporary Steel Plates
• Installation of ductbank
• Installation of manholes
• Backfilling
• Temporary Restoration
• Permanent Restoration
Electrical Construction • Work occurs at manhole locations throughout route
• Temporary Traffic Control at manhole locations
• Pulling and Installation of Cable
• Splicing of Cable
* TAKOMA SUBSTATION
HARVARD SUBSTATION *
Ward 4 – Fall 2019/Winter 2020
Fall 2019/Winter 2020 - 1 location
0.45 miles of civil construction
Civil Construction
• Temporary Traffic Control
• Closure of 2 lanes
• Trenching
• Temporary Steel Plates
• Installation of ductbank
• Installation of manholes
• Backfilling
• Temporary Restoration
• Permanent Restoration
Electrical Construction • Work occurs at manhole locations throughout route
• Temporary Traffic Control at manhole locations
• Pulling and Installation of Cable
• Splicing of Cable
* TAKOMA SUBSTATION
HARVARD SUBSTATION *
Ward 4 – Spring/ Summer 2020
Spring/Summer 2020 - 1 location
0.45 miles of civil construction
Civil Construction
• Temporary Traffic Control
• Closure of 2 lanes
• Trenching
• Temporary Steel Plates
• Installation of ductbank
• Installation of manholes
• Backfilling
• Temporary Restoration
• Permanent Restoration
Electrical Construction • Work occurs at manhole locations throughout route
• Temporary Traffic Control at manhole locations
• Pulling and Installation of Cable
• Splicing of Cable
* TAKOMA SUBSTATION
HARVARD SUBSTATION *
Ward 4 – Completed Construction – Spring 2021
• 2018 - 2 Crews1
• 0.9 miles of construction
• 2019 - 1 Crew1
• 1.1 miles of construction
• 2020 – 1 Crew1
• 0.7 miles of construction
Assumptions: 20 Linear feet per day Two crews mobilized at different
locations along route Sometimes only 1 crew in Ward 4 3-5 members per crew
1 - Assumptions based on preliminary design and previous projects. Actual durations and number of crews subject to change upon award of contract to contractor
* TAKOMA SUBSTATION
HARVARD SUBSTATION *
Upgrading Aging
Infrastructure
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Upgrading Aging Infrastructure
Upgraded equipment and infrastructure will include higher capacity transformers and feeders to relieve other substations, which are expected to reach their maximum capacity within the next few years
Takoma Substation Harvard Substation Champlain Substation
Built in 1932
Planned Work:
Upgrade existing
substation
Built in 1930
Planned Work:
Rebuild and upgrade
existing substation
Built in 1907
Planned Work:
Rebuild and upgrade
on existing
substation site
Addressing
Capacity Needs
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Constructing a New Substation:
Mount Vernon Substation
Mount Vernon Triangle,
Northwest One, Shaw, NoMa and
surrounding areas are
experiencing residential and
commercial growth:
• More than 22,700 residential
units and over 16.6 million
square feet of retail and
office space is completed or
in progress
This growth places increasingly
heavier demands on the electric
grid
Meeting this demand requires
new infrastructure, like the
proposed Mount Vernon
Substation
Project Benefits
The Capital Grid project is supporting the
District of Columbia Renewable Portfolio
Standard Expansion Amendment Act of
2016, which strives to increase the District’s
renewable portfolio by 50% by 2032
The Capital Grid project supports this
initiative by modernizing the system so that
it can accommodate more solar
connections to the grid, ultimately we will
accommodate more customers who want to
sell power back into the grid
By increasing transmission and substation
capacity, the Capital Grid project will
increase the electric system hosting
capacity for accommodating more
customer-generated power by up to 150
MW (about 30,000 home rooftop
installations)
The Capital Grid Project:
Renewable Energy Benefits
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The Capital Grid Project:
Economic Benefits
The proposed Capital Grid project will
support the local economy by:
• Expanding and increasing procurement
opportunities for local minority, women, veteran,
and disabled contractors as well as *CBE
subcontractors for good-paying technical jobs and
contracts
• Supporting economic development and new
residential and business growth by establishing a
strong, dynamic grid
*Certified Business Enterprises in the District
Timeline &
Next Steps
The Review Process
As a regulated company, our proposal must be
reviewed and approved before construction may
begin
The Public Service Commission of the District of
Columbia (DC PSC) will examine our proposed
plan in the form of two formal filings
The DC PSC will provide opportunity for
community feedback and evaluate the safety,
need and reasonableness of our proposal before
making a decision
The District of Columbia Board of Zoning
Adjustment (BZA) will also review the proposed
Capital Grid Project plan
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Stakeholder Outreach
We are committed to:
Creating awareness among our local and federal partners
Maintaining a close working relationship with residents and businesses
through all project phases
Receiving input from affected neighbors through charrettes, community
meetings and presentations
Providing project information and updates regarding the regulatory review
process and construction locations and hours
Sharing information via project website, listservs, etc.
• Online: www.pepco.com/CapitalGrid
• Email: [email protected]
• Social Media: Use #CapGrid on Twitter and Facebook
• Community meetings
