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
|
1997–2024
|
|
Monthly; Reporting Year Forecast
|
1997–2024
|
|
Monthly; Year 1 Forecast
|
1997–2024
|
|
Annual; Prior Year Actual
|
1990–2024
|
|
Annual; Reporting Year Forecast
|
1990–2024
|
|
Annual; Years 1 – 10 Forecast
|
1990–2024
|
|
Peak Hour Demand
|
Monthly; Prior Year Actual
|
1997–2024
|
|
Monthly; Reporting Year Forecast
|
1997–2024
|
|
Monthly; Year 1 Forecast
|
1997–2024
|
|
Seasonal; Prior Year Actual
|
1990–2024
|
|
Seasonal; Reporting Year Forecast
|
1990–2024
|
|
Seasonal; Years 1 – 10 Forecast
|
1990–2024
|
|
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
|
1990–2024
|
|
2024 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
|
2024
|
|
2024 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
|
2024
|
Click here for:
2024 ES&D - Released December 2024
Updated July 2025 with corrected 2024 Reference Margin Levels and 2024 Anticipated Excess/Shortfall Values in MISO. See 2024 LTRA errata for more information.
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 2024 ES&D.
