Generator inventory

Every generator at a published plant as Form EIA-860 lists it for the inventory year: its nameplate capacity, technology, energy source, status and dates. Capacity is a rating in MW, not output; a storage unit's energy capacity in MWh is a separate number.

At a glance

Period: 2024
One row is: generator of a published plant, at the inventory year
Built from: 4 sourcesgenerator x report_date (annual); grain not declaredgenerators codes operational status codes energy sources codes prime movers
Edition in this release: PUDL v2026.9.0 (embedded 2026.8.1.dev50) · 4 files · retrieved 2026-09-29
Download: generator_snapshot.parquet ↓1,642 rows · 32 KB

Each source: evidence, method and origin4 sources

Every source this dataset is built from, as each declares itself. Nothing here is summarized across sources.
Source	One source row is	Evidence and method
U.S. EIA Form 860 (mix of EIA forms, harvested) ↗Notice and licenceLicence: CC-BY-4.0	generator x report_date (annual)	reported · derived
EIA operational status code dictionaryNotice and licenceLicence: CC-BY-4.0	Not declared	Not declared · not declared
EIA energy source code dictionaryNotice and licenceLicence: CC-BY-4.0	Not declared	Not declared · not declared
EIA prime mover code dictionaryNotice and licenceLicence: CC-BY-4.0	Not declared	Not declared · not declared

Measures

Column	Unit	What it measures
`capacity_mw`	MW	Nameplate capacity of the generator as reported on Form EIA-860. A rating at one instant; summed across generators, never across years.
`energy_storage_capacity_mwh`	MWh	Nameplate energy capacity of a storage generator as reported on Form EIA-860. Applies to storage units only, and is never added to capacity in MW.

Coverage at 2024

1,642 generators

One inventory year, so there is no range. Counts are generators, not quantities.
Measure	With a value	Without a value	Not applicable
capacityMW	1,640	2	0
storage energyMWh	45	12	1,585

By status_category4 values

status_category	generators	capacity: with a value	storage energy: with a value
existing	1,354	1,3540 without · 0 not applicable	106 without · 1,338 not applicable
proposed	128	1280 without · 0 not applicable	326 without · 90 not applicable
retired	158	1580 without · 0 not applicable	30 without · 155 not applicable
unknown	2	02 without · 0 not applicable	00 without · 2 not applicable

By maturity1 values

maturity	generators	capacity: with a value	storage energy: with a value
final	1,642	1,6402 without · 0 not applicable	4512 without · 1,585 not applicable

What is missing, and why

Listed without a reported value · capacityRows with no value for this measure; published as null, never zero
2 generators
Listed without a reported value · storage energyRows with no value for this measure; published as null, never zero
12 generators
Not applicable · storage energyRows where is_storage is false and that carry no value; the measure does not apply to them
1,585 generators
Outside the atlas frameSource rows for the snapshot year left out of the table: outside the frame authorities and the core states
33,229 generators

How often it changes

Checked 2026-09-21

Publisher: Form EIA-860 is EIA's Annual Electric Generator Report. Its page lists releases of two kinds: early release data and final data.www.eia.gov/electricity/data/eia860/ ↗
Delay: On the checked date EIA's latest release, dated September 10, 2026, carried final 2025 data; the next release was listed as June 2027 for early release 2026 data.www.eia.gov/electricity/data/eia860/ ↗
This atlas: The atlas reads EIA-860 through PUDL, which Catalyst Cooperative publishes as quarterly versioned releases. Each atlas release pins one PUDL version, named under edition; the table changes only when that pin moves. No timed refresh.docs.catalyst.coop/pudl/en/v2026.9.0/data_access.html ↗

Checks and corrections

keys.generator_unique{"distinct":1642,"rows":1642}
Passed
fk.generator_plant{"orphans":0}
Passed
maturity.generators{"final":1642}
Passed
storage.group_from_prime_mover{"mismatched_generators":0}
Passed
reconcile.raw_workbook_spot_checks{"matched":86,"mismatches":[],"plants":[6163,3845,55103,6076,3921],"total":86}
Passed

No corrections apply to this dataset in this release. Earlier editions: not available (earlier releases did not retain per-dataset edition comparisons).

Release 20260929T050546Z-51ae0f7d3c78