core_eia860m__changelog_generators
Return to SearchChangelog table tracking changes in generator characteristics reported in EIA-860M.
- Most-recent data:
2026
- Processing:
Data has been cleaned and organized into well-modeled tables that serve as building blocks for downstream wide tables and analyses.
- Source:
EIA Form 860M -- Monthly Update to the Annual Electric Generator Report
- Primary key:
plant_id_eia, generator_id, report_date
Additional Details
EIA-860M includes generator tables with the most up-to-date catalog of EIA generators and their operational status and other generator characteristics. EIA-860M is reported monthly, although for the vast majority of the generators nothing changes month-to-month. This table is a changelog of that monthly reported generator data. There is a record corresponding to the first instance of a generator and associated characteristics with a report_date column and a valid_until_date column. Whenever any of the reported EIA-860M data was changed for a record, there will be a new changelog record with a new report_date.
Columns
Date reported.
The record in the changelog is valid until this date. The record is valid from the report_date up until but not including the valid_until_date.
The unique six-digit facility identification number, also called an ORISPL, assigned by the Energy Information Administration.
Plant name.
The EIA Utility Identification number.
The name of the utility.
Generator ID is usually numeric, but sometimes includes letters. Make sure you treat it as a string!
EIA short code identifying a balancing authority. May include Canadian and Mexican BAs.
Total installed (nameplate) capacity, in megawatts.
County name.
The most recently updated effective date on which the generator is scheduled to start operation
Maturity of the source data published by EIA that is reflected in this record. EIA releases data incrementally over time, including monthly updates, annual year-to-date updates, provisional early releases of annual data, and final annual release data that is not expected to change further. Records sourced from multiple upstream EIA datasets may have no well defined data maturity. Records whose values have been inferred within PUDL will also have no data maturity.
The code representing the most predominant type of energy that fuels the generator.
Energy storage capacity in MWh (e.g. for batteries).
Simplified fuel type code used in PUDL
Date the generator began commercial operation. If harvested values are inconsistent, we default to using the most recently reported date.
Date of the scheduled or effected retirement of the generator.
Latitude of the plant's location, in degrees.
Longitude of the plant's location, in degrees.
Generation capacity in megawatts of direct current that is subject to a net metering agreement. Typically used for behind-the-meter solar PV.
The operating status of the asset. For generators this is based on which tab the generator was listed in in EIA 860.
The operating status of the asset.
Planned effective month that the generator is scheduled to enter operation after the derate modification.
Planned effective date of the scheduled retirement of the generator.
Decrease in summer capacity expected to be realized from the derate modification to the equipment.
Increase in summer capacity expected to be realized from the modification to the equipment.
Planned effective date that the generator is scheduled to enter operation after the uprate modification.
Planned effective date that the generator is scheduled to enter operation after the repowering is complete.
Code for the type of prime mover (e.g. CT, CG)
EIA assigned sector ID, corresponding to high level NAICS sector, designated by the primary purpose, regulatory status and plant-level combined heat and power status
Two letter US state abbreviation.
The net summer capacity.
High level description of the technology used by the generator to produce electricity.
The net winter capacity.