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Electricity Supply & Demand (ES&D)
Overview
NERC collects, maintains, and annually publishes the Electricity Supply and Demand (ES&D) database, which includes 10-year projections for the North American bulk power system (BPS). Data are validated by the NERC Regions, NERC staff, and the Reliability Assessment Subcommittee (RAS) during NERC’s annual development of the Long-Term Reliability Assessment (LTRA).
 
Data are presented for each NERC Region (and subregions where applicable) for years 1990-2010. For years 2011 to present, data are presented for each NERC Assessment Area. Some information in the ES&D has been aggregated to protect sensitive information. 
 
Category
Data Description
Data Scope
Availability
Electricity Energy & Demand
Net Energy for Load (NEL)
Monthly; Prior Year Actual
1997–2017
Monthly; Reporting Year Forecast
1997–2017
Monthly; Year 1 Forecast
1997–2017
Annual; Prior Year Actual
1990–2017
Annual; Reporting Year Forecast
1990–2017
Annual; Years 1 – 10 Forecast
1990–2017
Peak Hour Demand
Monthly; Prior Year Actual
1997–2017
Monthly; Reporting Year Forecast
1997–2017
Monthly; Year 1 Forecast
1997–2017
Seasonal; Prior Year Actual
1990–2017
Seasonal; Reporting Year Forecast
1990–2017
Seasonal; Years 1 – 10 Forecast
1990–2017
Demand & Resource Projections
Energy Efficiency and Conservation; Behind the Meter Generation; Distributed Generation; Total Internal Demand; Available Demand Response; Net Internal Demand; Other Capacity Adjustments; Retirements; Scheduled Outages; Transmission Limitation; Existing Generation; Planned Generation by Tier; Capacity Transfers(Imports/Exports); Resource Categories; Planning Reserve Margins; Reference Margin Levels
Seasonal; Actual, Reporting Year Forecast, and Years 1-10 Forecast
1990–2017
2017
Transmission Projects
Includes 10-year projections for new transmission line projects, categorized as follows:
Country; Region; Assessment Area; NERC Project ID; Project ID; Project Status; Project Name; Tie Line; Primary Driver; Secondary Driver; Terminal Origin; Terminal End Point; Company Name; Company EIA Code; Entity Type; Ownership (%); Line Length (Circuit Miles); Line Type; Voltage Type; Operating Voltage Class; Voltage Design (kV); Circuits per Structure – Present; Circuits per Structure – Ultimate; Capacity Rating (MVA); In-Service Month-Year – Original; In-Service Month-Year – Expected; Cause of Delay / Other Comments
Years 1-10 Projections
2017
2017 Transformer Projects
Includes 10-year projections for new transformer projects, categorized as follows:
Project ID; Project Name; Project Status; Voltage - Low-Side (kV); Voltage - High-Side (kV); In-Service Month-Year; Description/Status
Years 1-10 Projections
2017
 
2017 ES&D: Released December 2017 (Download Here)
 
Data Questions
Please direct all data inquiries to NERC staff. References to the data and/or findings of the assessment are welcome with appropriate attribution of the source to the NERC 2017 ES&D.