The Capital Grid Project: Building Tomorrow s Energy Grid Today Lamond- Riggs Citizens Association October 2, 2017
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 2
How Energy is Delivered to You 3
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 4
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 This map animation is for illustration purposes only and does not reflect exact corridor locations or service area.
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 mixeduse development Intentional or unintentional physical damage to overhead facilities, such as vandalism or a vehicle accident 6
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 7
Building a Networked System
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 9
4 TH STREET NW The Capital Grid Project: 10-Mile Transmission Route TAKOMA SUBSTATION HARVARD SUBSTATION CHAMPLAIN SUBSTATION T STREET NW MT. VERNON SUBSTATION WATERFRONT SUBSTATION 10
Ward 4 - Overview TAKOMA SUBSTATION HARVARD SUBSTATION 11
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 TAKOMA SUBSTATION 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 HARVARD SUBSTATION
Ward 4 Fall 2018/Winter 2019 TAKOMA SUBSTATION 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 HARVARD SUBSTATION
Ward 4 Spring/Summer 2019 HARVARD SUBSTATION TAKOMA SUBSTATION 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
Ward 4 Fall 2019/Winter 2020 HARVARD SUBSTATION TAKOMA SUBSTATION 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
Ward 4 Spring/ Summer 2020 HARVARD SUBSTATION TAKOMA SUBSTATION 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
Ward 4 Completed Construction Spring 2021 TAKOMA SUBSTATION 2018-2 Crews 1 0.9 miles of construction 2019-1 Crew 1 1.1 miles of construction 2020 1 Crew 1 0.7 miles of construction HARVARD SUBSTATION 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
Upgrading Aging Infrastructure
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 1907 Planned Work: Rebuild and upgrade on existing substation site Built in 1930 Planned Work: Rebuild and upgrade existing substation 23
Addressing Capacity Needs
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 25
Project Benefits
The Capital Grid Project: Renewable Energy 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) 10
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 28
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
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: CapitalGrid@Pepco.com Social Media: Use #CapGrid on Twitter and Facebook Community meetings 31