Roosevelt County, MT. Reports to the Southwest Power Pool balancing authorityThe organization that balances electricity supply and demand in a reporting area.Definition ↗.
2024 inventory / 2024 calendar year
Sum of generator nameplate MW with operational status code OP in the inventory year; one row per generator; unscaled by ownership
2024 inventory · reported · derived · valid · final
1 of 1 operating generators included.
out_eia__yearly_generators.parquet; report_date=2024-01-01; plant_id_eia=56606
Publisher & attribution ↗ Cite this released fact ↗Sum of EIA-923 annual net generation over the plant's unique prime-mover x energy-source rows; negative values (pumping, station use) retained
2024 calendar year · reported · derived · valid · final
1 of 1 plant x prime-mover x fuel rows included.
out_eia923__yearly_generation_fuel_combined.parquet; report_date=2024-01-01; plant_id_eia=56606
Publisher & attribution ↗ Cite this released fact ↗Net generation MWh / (operating nameplate MW x hours in year); only when every operating generator was operating before the year began and none retired during it
2024 calendar year · reported · derived · valid · final
derived: net_generation_mwh@2024 / (nameplate_mw_op x 8784 h)
Publisher & attribution ↗ Cite this released fact ↗Annual net generation · MWh. Bars below zero are negative net generation; a hollow mark means not reported. Missing years are not filled.
| Calendar year | Net generation · MWh | Evidence |
|---|---|---|
| 2015 | 104,141MWh | reported · final |
| 2016 | 95,987MWh | reported · final |
| 2017 | 45,079MWh | reported · final |
| 2018 | 110,554MWh | reported · final |
| 2019 | 116,337MWh | reported · final |
| 2020 | 48,207MWh | reported · final |
| 2021 | 117,554MWh | reported · final |
| 2022 | 179,031MWh | reported · final |
| 2023 | 316,611MWh | reported · final |
| 2024 | 251,232MWh | reported · final |
Sum of unique plant x prime-mover x fuel rows per year; negative values retained; missing years absent, not zero; no monthly curve inferred
Operating nameplate MW x ownership fraction, once per generator; reported schedule or EIA-860 schedule-4 default. Ownership source & rules ↗
| Generator | Technology / statusWhether a generator or project is operating, planned, on standby or retired, as its source reports it.Definition ↗ | NameplateA generator’s rated maximum power, in MW. Capacity is a rating, not how much electricity it produced.Definition ↗ · MW | Ownership basisHow a generator's owners were established: from EIA-860's ownership schedule (reported), from EIA's rule that a unit absent from a complete schedule is wholly owned by its operator (derived), or unknown.Definition ↗ |
|---|---|---|---|
| 1 | Natural Gas Fired Combustion Turbineoperating (OP) | 108.2MW | EIA schedule default · derivedGenerator absent from a complete Schedule 4 with ownership code S and known operator: wholly owned by the operator per EIA instructions (derived) Basin Electric Power Cooperative · 1 fraction · 108.2MW owned · reported, derived |
1 monitored unit covering 1 of 1 combustion generators, 108.2 of 108.2 MW. 82.5% of operating unit-hours carry EPA’s measured flag; the rest are substitute dataHours a unit filled under Part 75 missing-data procedures instead of a monitor reading; EPA flags each hour Measured, Substitute or Measured and Substitute. Substitute values are designed to err high. The atlas counts these hours, and a plant's CO2 fact is metered only when at least 99 percent of its operating unit-hours were measured.Definition ↗.
Sum of hourly CO2 mass reported under 40 CFR Part 75 by the plant's EPA-monitored units over the reporting year, short tons x 0.90718474. Stack total of those units including any share attributable to steam sold; the plant's total only where every combustion generator is monitored
2024 calendar year · estimated · derived · valid · final
1 of 1 combustion generators included.
82.5% of operating unit-hours were flagged Measured; the rest follow Part 75 missing-data procedures, which are designed to err high
core_epacems__hourly_emissions.parquet; year=2024; plant_id_eia=56606
Publisher & attribution ↗ Cite this released fact ↗Monitored-unit CO2 (tonnes) divided by the plant's EIA-923 net generation for the same year. Only where every combustion generator is monitored, so numerator and denominator cover the same plant; comparable across such plants
2024 calendar year · estimated · derived · valid · final
derived: co2_mass_tonnes@2024 / net_generation_mwh@2024 (pudl-output)
Publisher & attribution ↗ Cite this released fact ↗Monitored-unit CO2 (tonnes) divided by the same units' reported gross load. Only where every combustion generator is monitored and the gross load is not below EIA net generation; gross, so lower than the net figure, and not comparable with it
2024 calendar year · estimated · derived · valid · final
derived: co2_mass_tonnes@2024 / cems_gross_load_mwh@2024
Publisher & attribution ↗ Cite this released fact ↗| Year | CO2t CO2 | Evidence | Measured shareof operating unit-hours | Net intensityt CO2/MWh |
|---|---|---|---|---|
| 2023 | 137,815 | metered1 unit, 1 of 1 generators | 100.0% | 0.435 |
| 2024 | 122,921 | estimated1 unit, 1 of 1 generators | 82.5% | 0.489 |
| Figure | Value | Basis |
|---|---|---|
| CO2 mass, monitored units | 122,921 t CO2 | Sum of hourly CO2 mass reported under 40 CFR Part 75 by the plant's EPA-monitored units over the reporting year, short tons x 0.90718474. Stack total of those units including any share attributable to steam sold; the plant's total only where every combustion generator is monitored |
| CO2 mass, monitored units, as filed | 135,497 short tons CO2 | The same sum in the unit EPA's files use (short tons); shown beside the metric figure so the conversion is visible |
| Gross load of monitored units | 259,384 MWh | Sum over the year of each monitored unit's reported hourly gross load (MW) x operating time (h). A unit-reported quantity: a combined-cycle unit need not include its steam turbine, so this can be below EIA net generation |
| Heat input of monitored units | 2,280,060 mmBtu | Sum over the year of each monitored unit's reported hourly heat input |
| Unit operating hours, monitored units | 4,356.2 h | Sum of reported operating time over the plant's monitored units: unit-hours, so it can exceed the hours in the year when several units ran |
| Hours in which a monitored unit ran | 4,498 count | Calendar hours of the reporting year in which at least one monitored unit reported operating time; never above the hours in the year |
| EPA emissions units with CEMS rows | 1 count | Distinct EPA emissions units at the plant with rows in the reporting year; an EPA unit is a combustor or stack, not an EIA generator |
| Combustion generators linked to a monitored unit | 1 count | Existing coal, gas, oil or waste generators of the plant (EIA-860 inventory year) that the EPA-EIA crosswalk links to a unit with CEMS rows; a steam turbine linked to several combustion turbines counts once |
| Combustion generators at the plant | 1 count | Existing (operating, standby or out of service) generators whose resource group is coal, gas, oil or waste in the EIA-860 inventory year: the units that could be monitored |
| Share of operating unit-hours with measured CO2 | 0.8255 fraction | Operating unit-hours EPA flagged Measured divided by all operating unit-hours of the plant's monitored units; the rest were Substitute, Measured and Substitute, or another method code |
| CO2 per MWh of net generation | 0.489 t CO2/MWh | Monitored-unit CO2 (tonnes) divided by the plant's EIA-923 net generation for the same year. Only where every combustion generator is monitored, so numerator and denominator cover the same plant; comparable across such plants |
| CO2 per MWh of gross load (unit-reported) | 0.474 t CO2/MWh | Monitored-unit CO2 (tonnes) divided by the same units' reported gross load. Only where every combustion generator is monitored and the gross load is not below EIA net generation; gross, so lower than the net figure, and not comparable with it |
CO2 reported hourly under 40 CFR Part 75 by this plant's EPA-monitored units and summed over the reporting year, as filed (short tons) and in tonnes. It is a stack total of those units, includes any share attributable to steam sold, and is not CO2-equivalent, lifecycle or consumption-based. EPA-monitored units are one program's population: the figure is not a regional total and an unmonitored plant is not zero. Evidence rule: metered where at least 99% of the plant's operating unit-hours carry EPA's Measured flag, estimated where more were Substitute, Measured and Substitute or another method code. Source and notice· matched through EPA’s crosswalk.
No confirmed status or capacity changes among comparable units. Missing monthly assertions and units outside the baseline have no like-for-like comparison.
Sum of nameplate MW over generators whose current-valid EIA-860M workbook assertion has status OP; dated by the complete inventory edition; never added to the baseline aggregate
2026-08-01 · reported · derived · valid · provisional
1 of 1 current and historical generators included.
Preliminary Monthly Electric Generator Inventory, August 2026; plant_id_eia=56606; report_date=2026-08-01
Publisher & attribution ↗ Cite this released fact ↗Sum of nameplate MW over generators whose current-valid EIA-860M workbook assertion is a proposal or construction stage (P, L, T, U, V, OT, TS); a proposal is not a commitment and its date is a forecast
2026-08-01 · reported · derived · not_applicable · provisional
1 of 1 current and historical generators included.
Preliminary Monthly Electric Generator Inventory, August 2026; plant_id_eia=56606; report_date=2026-08-01
Publisher & attribution ↗ Cite this released fact ↗Sum of nameplate MW over generators whose current-valid EIA-860M workbook assertion is retired, cancelled or indefinitely postponed (RE, CN, IP); retired is not demolished
2026-08-01 · reported · derived · not_applicable · provisional
1 of 1 current and historical generators included.
Preliminary Monthly Electric Generator Inventory, August 2026; plant_id_eia=56606; report_date=2026-08-01
Publisher & attribution ↗ Cite this released fact ↗Each unit's operating span from its reported operating date to its retirement date or to the August 2026 inventory (the vertical line). Dashed spans start at a planned operating date, a forecast; a short bar marks a planned retirement. Standby and out-of-service units are hatched.
| Unit | State | Operating since | Planned | Retired | MW |
|---|---|---|---|---|---|
| 1 | Operating | December 2010 | — | — | 108.2MW |
Independently dated by EIA-860M; the baseline facts above stay the validated edition. Planned dates are forecasts; retired is not demolished.
Balancing authority: Southwest Power Pool
Approximate service areasAn approximate utility service area. The boundary cannot identify the supplier for a particular address.Definition ↗ containing the plant’s location. A geographic candidate, not a supply relationship.
Within 3 km of the reported plant point, nearest first. BPA’s published lines, HIFLD-compiled lines of other owners and HIFLD 2022 substations; nearness does not establish an electrical connection.
Generator rows for the plant in the inventory year, any status
2024 inventory · reported · derived · valid · final
out_eia__yearly_generators.parquet; report_date=2024-01-01; plant_id_eia=56606
Publisher & attribution ↗ Cite this released fact ↗Generator rows with status code OP
2024 inventory · reported · derived · valid · final
out_eia__yearly_generators.parquet; report_date=2024-01-01; plant_id_eia=56606
Publisher & attribution ↗ Cite this released fact ↗Catalyst Cooperative, PUDL v2026.9.0, derived from U.S. EIA Forms 860/923
Data transformed by PUDL from U.S. EIA forms; selected fields republished; EIA data is public with dated acknowledgment (https://www.eia.gov/about/copyrights_reuse.php)
Catalyst Cooperative, PUDL v2026.9.0, derived from U.S. EIA Forms 860/923
Data transformed by PUDL from U.S. EIA forms; selected fields republished; EIA data is public with dated acknowledgment (https://www.eia.gov/about/copyrights_reuse.php)
Catalyst Cooperative, PUDL v2026.9.0, derived from U.S. EIA Forms 860/923
Data transformed by PUDL from U.S. EIA forms; selected fields republished; EIA data is public with dated acknowledgment (https://www.eia.gov/about/copyrights_reuse.php)
Catalyst Cooperative, PUDL v2026.9.0, derived from U.S. EIA Forms 860/923
Data transformed by PUDL from U.S. EIA forms; selected fields republished; EIA data is public with dated acknowledgment (https://www.eia.gov/about/copyrights_reuse.php)
Catalyst Cooperative, PUDL v2026.9.0, derived from U.S. EPA CAMD Power Sector Emissions Data
Data transformed by PUDL from U.S. EPA Clean Air Markets Division hourly emissions files; selected fields for two reporting years and four states republished; EPA data is public (https://www.epa.gov/power-sector/power-sector-data)
Catalyst Cooperative, PUDL v2026.9.0, derived from the U.S. EPA-EIA Power Sector Data Crosswalk
Data transformed by PUDL from EPA's camd-eia-crosswalk (https://github.com/USEPA/camd-eia-crosswalk); selected fields republished
Release 20260929T050546Z-51ae0f7d3c78 · Record JSON