Battery storageOR

Constable BESS

About this record

Washington County, OR. Reports to the Portland General Electric balancing authorityThe organization that balances electricity supply and demand in a reporting area.Definition ↗.

2024 inventory / 2024 calendar year

Nameplate capacity, operating generatorsFull nameplate rating of the operating generators, before ownership shares. MW measures rated power; annual output is energy in MWh.Definition ↗
75MW
Source & method

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=67712

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Net generationEnergy produced over the stated period after the plant’s own use, including signed storage output. Plant output is not allocated to owners or buyers.Definition ↗
-129MWh
2024
Source & method

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=67712

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Capacity factor
Not supported for this scope
2024
Source & method

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 · unsupported · final

Operating capacity changed during the year (unit started, retired, or has no operating date); no fixed denominator

derived: net_generation_mwh@2024 / (nameplate_mw_op x 8784 h)

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Output over time

Net generation · MWhElectricity produced after the plant’s own use. A negative value means it used more electricity than it produced.Definition ↗

Annual net generation · MWh. Bars below zero are negative net generation; a hollow mark means not reported. Missing years are not filled.

Annual values as a table · MWh
Reported annual net generation. Missing years are not filled.
Calendar yearNet generation · MWhEvidence
2024-129MWhreported · 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

Why capacity and output differ: field note ↗

Ownership & operation

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 ↗

Operating nameplate MW x ownership fraction, once per generator; reported schedule or EIA-860 schedule-4 default. Ownership source & rules ↗

Generators at this plant

Unscaled nameplateA generator’s rated maximum power, in MW. Capacity is a rating, not how much electricity it produced.Definition ↗
1 generators, including non-operating units where reported. Status is the inventory-year status.
GeneratorTechnology / 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 ↗ · MWOwnership 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 ↗
CSTB1 BatteriesBattery storage· Lithium-ion Battery· arbitrage, system peak shaving, voltage or reactive power supportoperating (OP)75MW
EIA schedule default · derived

Generator absent from a complete Schedule 4 with ownership code S and known operator: wholly owned by the operator per EIA instructions (derived)

Portland General Electric · 1 fraction · 75MW owned · reported, derived

CO2 filed by EPA-monitored units

2024

This plant has no coal, gas, oil or waste generator, so it has no combustion unit for EPA to monitor and no CEMS data exists. That is not a claim of zero emissions: the atlas reports only what EPA-monitored units filed. Source

StorageBatteries, pumped hydro and other systems that store electricity for later use.Definition ↗ · Battery storage

Standalone

1 operating storage unit. Stores electricity; does not generate. Net output is net of chargingEnergy taken in to charge, energy returned, and their difference. Charging can make net generation negative.Definition ↗.

Storage discharge capacity, operating storage units
75MW
Source & method

Sum of nameplate MW over operating generators whose prime mover is a storage technology (BA, PS, FW, CE, CP, ES); a discharge rating, counted as its own resource row, never merged with generation MW

2024 inventory · reported · derived · valid · final

1 of 1 storage units included.

out_eia__yearly_generators.parquet; report_date=2024-01-01; plant_id_eia=67712

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Storage charge capacity, operating storage units
75MW
Source & method

Sum of reported maximum charge rate MW (EIA-860 Schedule 3 Part B) over operating storage units that report it; batteries, flywheels and compressed air only

2024 inventory · reported · derived · valid · final

1 of 1 operating storage units included.

core_eia860__scd_generators_energy_storage.parquet; report_date=2024-01-01; plant_id_eia=67712

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Storage energy capacity, operating storage units
300MWh
Source & method

Sum of reported nameplate energy capacity MWh over operating storage units (EIA-860 line 34: batteries, flywheels, compressed air; null for pumped and thermal storage); unknown stays unknown

2024 inventory · reported · derived · valid · final

1 of 1 operating storage units included.

out_eia__yearly_generators.parquet; report_date=2024-01-01; plant_id_eia=67712

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Storage duration at full discharge
4h
Source & method

Nameplate energy MWh divided by nameplate MW, only when every unit has energy capacity and a positive reported discharge rate agreeing with nameplate within 0.05 MW; a nameplate ratio, not usable state of charge

2024 inventory · reported · derived · valid · final

1 of 1 operating storage units with verified duration included.

derived: validated per-unit ratings; plant_id_eia=67712

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Charged, discharged and net energy of the storage units by calendar year (EIA-923). Net is signed; a round-trip ratio needs twelve reported months.
YearCharged · MWhDischarged · MWhNet · MWhRound tripDischarged energy divided by charged energy over a full reported year. A description, not an efficiency rating.Definition ↗Months
20241,534MWh1,405MWh-129MWhNot supported for this scope1

A co-located plant's deliverable capacity is not the sum of its components (EIA-860 carries no interconnection limit). Net storage output is signed and is never added to generation shares.

Latest inventoryThe newest complete monthly inventory, with dated status and capacity changes beside the annual baseline totals.Definition ↗ · August 2026

Operating

No confirmed status or capacity changes among comparable units. Missing monthly assertions and units outside the baseline have no like-for-like comparison.

Operating nameplate capacity, latest inventoryOperating nameplate MW in this monthly inventory. Compare it with the annual baseline; do not add the two inventories together.Definition ↗
75MW
· provisional
Source & method

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=67712; report_date=2026-08-01

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Planned nameplate capacity, latest inventoryNameplate MW proposed or under construction in this monthly inventory, separate from operating MW. Planned dates are forecasts.Definition ↗
Not applicable
· provisional
Source & method

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=67712; report_date=2026-08-01

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Retired or cancelled nameplate capacity, latest inventory
Not applicable
· provisional
Source & method

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=67712; report_date=2026-08-01

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Lifecycle of the units

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.

Units as a table
Unit lifecycle from EIA-860M, August 2026.
UnitStateOperating sincePlannedRetiredMW
CSTB1OperatingDecember 2024——75MW

Independently dated by EIA-860M; the baseline facts above stay the validated edition. Planned dates are forecasts; retired is not demolished.

Geographic & reporting context

Balancing authority: Portland General Electric

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.

Nearby transmission Context, not a connection

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.

Additional inventory facts

Generators listed
1count
Source & method

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=67712

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Operating generators
1count
Source & method

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=67712

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Storage discharge capacity, operating storage units
75MW
Source & method

Sum of nameplate MW over operating generators whose prime mover is a storage technology (BA, PS, FW, CE, CP, ES); a discharge rating, counted as its own resource row, never merged with generation MW

2024 inventory · reported · derived · valid · final

1 of 1 storage units included.

out_eia__yearly_generators.parquet; report_date=2024-01-01; plant_id_eia=67712

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Sources for this record

Frozen citation page ↗

PUDL v2026.9.0, out_eia__yearly_plants

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)

PUDL v2026.9.0, out_eia__yearly_generators

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)

PUDL v2026.9.0, out_eia860__yearly_ownership

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)

PUDL v2026.9.0, out_eia923__yearly_generation_fuel_combined

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)

Release 20260929T050546Z-51ae0f7d3c78 · Record JSON