Who owns what fraction of each generator at a published plant in the inventory year: from Form EIA-860 Schedule 4 where the schedule lists owners, and by the single-owner default (the operator owns all of a generator coded single-owner) where it does not. A share is a fraction of one generator and owned MW is that fraction of its nameplate; the table does not add MW across owners, and a generator with no share row has an unknown owner, not none.
At a glance
Period
2024
One row is
generator x owner, at the inventory year, with the basis (reported_schedule or eia860_schedule4_default) on every row
The owner's share of the generator between 0 and 1: as reported on Schedule 4, or 1.0 by the single-owner default, with the basis stated on the row.
owned_mw
MW
Nameplate capacity times the fraction: a rating of one owner's part of one generator. Null where the fraction is out of range. Not summed across the owners of a generator here.
Population
What the rows are counted against
Generatorsgenerators of published plants in the inventory year; each share is a fraction of one generator and owned MW is that fraction of its nameplate, never added across owners here
1,642 generators
Single-owner defaulteia860_schedule4_default
1,422 generators
Reported in Schedule 4reported_schedule
113 generators
Owner unknownunknown
107 generators
Coverage at 2024
1,609 shares
One inventory year, so there is no range. Counts are shares, not quantities.
Measure
With a value
Without a value
Not applicable
fractionfraction
1,609
0
0
owned mwMW
1,609
0
0
By basis2 values
basis
shares
fraction: with a value
owned mw: with a value
eia860 schedule4 default
1,422
1,4220 without · 0 not applicable
1,4220 without · 0 not applicable
reported schedule
187
1870 without · 0 not applicable
1870 without · 0 not applicable
By is_operating2 values
is_operating
shares
fraction: with a value
owned mw: with a value
false
314
3140 without · 0 not applicable
3140 without · 0 not applicable
true
1,295
1,2950 without · 0 not applicable
1,2950 without · 0 not applicable
What is missing, and why
Listed without a reported value · fractionRows with no value for this measure; published as null, never zero
0 shares
Listed without a reported value · owned mwRows with no value for this measure; published as null, never zero
0 shares
No row in the sourceGenerators whose EIA-860 ownership code says jointly (J) or third-party (W) owned, with no Schedule 4 row in the edition; the default applies to single owners only
0 generators
Listed without a reported valueGenerators whose inventory row lacks the ownership code or the operator, so neither a schedule row nor the single-owner default names an owner
2 generators
Not applicableProposed generators: the single-owner default covers existing and retired generators only, and Schedule 4 lists no owner for them
105 generators
Not derivedSingle-owner generators without a schedule row in a build whose Schedule 4 edition was not complete and final; the default rule waits for one
0 generators
Shares do not reconcileGenerators whose shares are out of range or sum above one: kept as reported and marked invalid, their owned MW left null; nothing is scaled
0 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 ↗
No corrections apply to this dataset in this release. Earlier editions: not available (earlier releases did not retain per-dataset edition comparisons).