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Atlas / Plants / Bonneville Lock and Dam
Hydro plantOR

Bonneville Lock and Dam

Listed by EIA as “Bonneville”.

About this record

Multnomah County, OR. Reports to the Bonneville Power Administration balancing authorityThe organization that balances electricity supply and demand in a reporting area.Definition ↗.

2024 inventory / 2024 calendar year

Show on the map ↗

Nameplate capacity, operating generatorsFull nameplate rating of the operating generators, before ownership shares. MW measures rated power; annual output is energy in MWh.Definition ↗
656.3MW
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

11 of 11 operating generators included.

out_eia__yearly_generators.parquet; report_date=2024-01-01; plant_id_eia=3075

Publisher & attribution ↗ Cite this released fact ↗
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 ↗
3,492,864MWh
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=3075

Publisher & attribution ↗ Cite this released fact ↗
Capacity factor
0.606fraction
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 · valid · final

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

Publisher & attribution ↗ Cite this released fact ↗

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
20154,127,097MWhreported · final
20164,625,436MWhreported · final
20174,834,674MWhreported · final
20184,859,814MWhreported · final
20194,207,101MWhreported · final
20204,669,766MWhreported · final
20214,010,436MWhreported · final
20224,681,188MWhreported · final
20233,631,018MWhreported · final
20243,492,864MWhreported · 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 ↗
20 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 ↗
1 Conventional Hydroelectricoperating (OP)53.5MW
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)

U.S. Army Corps of Engineers, Northwestern Division · 1 fraction · 53.5MW owned · reported, derived

10 Conventional Hydroelectricout_of_service_short_term (OA)62.1MW
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)

U.S. Army Corps of Engineers, Northwestern Division · 1 fraction · 62.1MW owned · reported, derived

11 Conventional Hydroelectricoperating (OP)66.5MW
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)

U.S. Army Corps of Engineers, Northwestern Division · 1 fraction · 66.5MW owned · reported, derived

12 Conventional Hydroelectricoperating (OP)66.5MW
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)

U.S. Army Corps of Engineers, Northwestern Division · 1 fraction · 66.5MW owned · reported, derived

13 Conventional Hydroelectricoperating (OP)66.5MW
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)

U.S. Army Corps of Engineers, Northwestern Division · 1 fraction · 66.5MW owned · reported, derived

14 Conventional Hydroelectricoperating (OP)66.5MW
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)

U.S. Army Corps of Engineers, Northwestern Division · 1 fraction · 66.5MW owned · reported, derived

15 Conventional Hydroelectricoperating (OP)66.5MW
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)

U.S. Army Corps of Engineers, Northwestern Division · 1 fraction · 66.5MW owned · reported, derived

16 Conventional Hydroelectricoperating (OP)66.5MW
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)

U.S. Army Corps of Engineers, Northwestern Division · 1 fraction · 66.5MW owned · reported, derived

17 Conventional Hydroelectricoperating (OP)66.5MW
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)

U.S. Army Corps of Engineers, Northwestern Division · 1 fraction · 66.5MW owned · reported, derived

18 Conventional Hydroelectricout_of_service_short_term (OA)66.5MW
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)

U.S. Army Corps of Engineers, Northwestern Division · 1 fraction · 66.5MW owned · reported, derived

2 Conventional Hydroelectricout_of_service_short_term (OA)53.5MW
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)

U.S. Army Corps of Engineers, Northwestern Division · 1 fraction · 53.5MW owned · reported, derived

3 Conventional Hydroelectricoperating (OP)62.1MW
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)

U.S. Army Corps of Engineers, Northwestern Division · 1 fraction · 62.1MW owned · reported, derived

4 Conventional Hydroelectricoperating (OP)62.1MW
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)

U.S. Army Corps of Engineers, Northwestern Division · 1 fraction · 62.1MW owned · reported, derived

5 Conventional Hydroelectricout_of_service_short_term (OA)62.1MW
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)

U.S. Army Corps of Engineers, Northwestern Division · 1 fraction · 62.1MW owned · reported, derived

6 Conventional Hydroelectricout_of_service_short_term (OA)62.1MW
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)

U.S. Army Corps of Engineers, Northwestern Division · 1 fraction · 62.1MW owned · reported, derived

7 Conventional Hydroelectricout_of_service_short_term (OA)62.1MW
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)

U.S. Army Corps of Engineers, Northwestern Division · 1 fraction · 62.1MW owned · reported, derived

8 Conventional Hydroelectricout_of_service_short_term (OA)62.1MW
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)

U.S. Army Corps of Engineers, Northwestern Division · 1 fraction · 62.1MW owned · reported, derived

9 Conventional Hydroelectricout_of_service_short_term (OA)62.1MW
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)

U.S. Army Corps of Engineers, Northwestern Division · 1 fraction · 62.1MW owned · reported, derived

F1 Conventional Hydroelectricoperating (OP)13.1MW
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)

U.S. Army Corps of Engineers, Northwestern Division · 1 fraction · 13.1MW owned · reported, derived

F2 Conventional Hydroelectricout_of_service_short_term (OA)13.1MW
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)

U.S. Army Corps of Engineers, Northwestern Division · 1 fraction · 13.1MW owned · reported, derived

Dam and river

Reviewed identity · 2026-09-21
  • Bonneville Locks and DamNational Inventory of Dams OR00001· Hydropower is a reported purpose in the NID. Associated power plant is included in the EHA.; NHDPlusV2
    usace-nid
  • Bonneville Lock and DamUSACE CWMS location NWDP BON · USACE's NIDID agency-alias group maps NID OR00001 (this plant's reviewed dam) to NWDP location BON; CWMS location 'Bonneville Lock and Dam' is a PROJECT in OR, 0.25 km from the EIA plant point; its name shares 'bonneville' with the NID dam name
    usace-cwms-history
  • BonnevilleColumbia River
    EHA hc0208_p01ornl-eha-2026
  • HUC-12 watershed
    170800010801ornl-hilarri-v4
  • NHDPlus reach
    23736161ornl-hilarri-v4

EHA 2026 EIA_PtID 3075 = EIA plant; state OR; EHA point 0.06 km from EIA point; names share a token; HILARRI v4 links EHA id to NID OR00001 (Bonneville Locks and Dam, Columbia River), NID point 0.02 km from EIA point; NID purposes: Navigation;Other;Recreation;Hydroelectric. These rows identify the same structures across inventories; they carry no generation, storage or flow figures.Link evidence ↗

River and reservoir · January 2024 cold spell

USACE CWMS · revised series

USACE's revised (CBT-REV) river and reservoir series at the project this plant belongs to, as the CWMS Data API served them. Water quantities, not generation: the API serves no generation series for this project, and the plant's generation on this page is EIA-923's. 2024-01-10 09:00 UTC to 2024-01-20 08:00 UTC: 240 hours, hour ending, UTC, the same hours as January 2024 cold spell.

OutflowcfsOutflow: The mean over the hour ending at the stamp, the same hour-ending convention as the episode.
050k100k150kJan 11Jan 12Jan 13Jan 14Jan 15Jan 16Jan 17Jan 18Jan 19Jan 20
Tailwater elevationft NGVD29Tailwater elevation: The reading at the stamp: the end of each hour shown. The axis spans this window’s range, not zero.
11.211.411.611.81212.212.4Jan 11Jan 12Jan 13Jan 14Jan 15Jan 16Jan 17Jan 18Jan 19Jan 20

Point at a chart, or move the slider, to read one hour.

  • Outflow · cfsThe mean over the hour ending at the stamp, the same hour-ending convention as the episode. 240 of 240 hours with a value.BON.Flow-Out.Ave.1Hour.1Hour.CBT-REV
    CDA query ↗retrieved 2026-09-29 05:01:09 UTC
  • Tailwater elevation · ft NGVD29The reading at the stamp: the end of each hour shown. 240 of 240 hours with a value.BON.Elev-Tailwater.Inst.1Hour.0.CBT-REV
    CDA query ↗retrieved 2026-09-29 05:01:11 UTC

The API serves these series unversioned: USACE revises values in place, so a later retrieval can differ. These are the publisher's revised series as served at the retrieval time recorded with each query. Each value keeps the CWMS quality code it was served with; code 0 is CWMS's code for an unscreened value. A value served with CDA's missing-value placeholder, or with a code that marks it missing or rejected, is shown as missing. Codes served here: 0. Keyed by USACE’s own alias: USACE's NIDID agency-alias group maps NID OR00001 (this plant's reviewed dam) to NWDP location BON; CWMS location 'Bonneville Lock and Dam' is a PROJECT in OR, 0.25 km from the EIA plant point; its name shares 'bonneville' with the NID dam name. NIDID alias group ↗ · Location record ↗ · Source record. U.S. Army Corps of Engineers, Northwestern Division, CWMS Data API (revised CBT series, as served at retrieval). Checks: water.units_match_declared passed · water.missing_stays_null passed · water.location_key_verified passed · water.series_complete passed.

Every hour as a table
Hourly values at the hour-ending UTC stamp; a daily value sits on the row of the local midnight that ends its day. Blank cells were not served.
Hour ending (UTC)Local timeOutflow · cfsTailwater elevation · ft NGVD29
2024-01-10 09:00Jan 10, 1:00 AM PST98,80011.6
2024-01-10 10:00Jan 10, 2:00 AM PST98,30011.6
2024-01-10 11:00Jan 10, 3:00 AM PST104,00011.5
2024-01-10 12:00Jan 10, 4:00 AM PST105,10011.5
2024-01-10 13:00Jan 10, 5:00 AM PST105,40011.6
2024-01-10 14:00Jan 10, 6:00 AM PST107,00011.6
2024-01-10 15:00Jan 10, 7:00 AM PST106,90011.7
2024-01-10 16:00Jan 10, 8:00 AM PST104,20011.7
2024-01-10 17:00Jan 10, 9:00 AM PST100,50011.5
2024-01-10 18:00Jan 10, 10:00 AM PST97,60011.3
2024-01-10 19:00Jan 10, 11:00 AM PST98,30011.3
2024-01-10 20:00Jan 10, 12:00 PM PST98,70011.3
2024-01-10 21:00Jan 10, 1:00 PM PST101,30011.3
2024-01-10 22:00Jan 10, 2:00 PM PST103,20011.4
2024-01-10 23:00Jan 10, 3:00 PM PST105,30011.5
2024-01-11 00:00Jan 10, 4:00 PM PST105,10011.6
2024-01-11 01:00Jan 10, 5:00 PM PST97,60011.6
2024-01-11 02:00Jan 10, 6:00 PM PST83,50011.6
2024-01-11 03:00Jan 10, 7:00 PM PST73,30011.4
2024-01-11 04:00Jan 10, 8:00 PM PST77,40011.4
2024-01-11 05:00Jan 10, 9:00 PM PST80,40011.4
2024-01-11 06:00Jan 10, 10:00 PM PST86,70011.4
2024-01-11 07:00Jan 10, 11:00 PM PST95,50011.6
2024-01-11 08:00Jan 11, 12:00 AM PST102,30011.7
2024-01-11 09:00Jan 11, 1:00 AM PST99,10011.5
2024-01-11 10:00Jan 11, 2:00 AM PST101,90011.5
2024-01-11 11:00Jan 11, 3:00 AM PST104,90011.6
2024-01-11 12:00Jan 11, 4:00 AM PST109,90011.8
2024-01-11 13:00Jan 11, 5:00 AM PST110,40011.6
2024-01-11 14:00Jan 11, 6:00 AM PST110,80011.6
2024-01-11 15:00Jan 11, 7:00 AM PST106,80011.6
2024-01-11 16:00Jan 11, 8:00 AM PST104,60011.6
2024-01-11 17:00Jan 11, 9:00 AM PST104,40011.7
2024-01-11 18:00Jan 11, 10:00 AM PST103,40011.7
2024-01-11 19:00Jan 11, 11:00 AM PST101,50011.7
2024-01-11 20:00Jan 11, 12:00 PM PST102,00011.6
2024-01-11 21:00Jan 11, 1:00 PM PST101,60011.6
2024-01-11 22:00Jan 11, 2:00 PM PST99,80011.4
2024-01-11 23:00Jan 11, 3:00 PM PST100,50011.6
2024-01-12 00:00Jan 11, 4:00 PM PST102,50011.7
2024-01-12 01:00Jan 11, 5:00 PM PST102,30011.9
2024-01-12 02:00Jan 11, 6:00 PM PST97,60012.3
2024-01-12 03:00Jan 11, 7:00 PM PST83,30012.3
2024-01-12 04:00Jan 11, 8:00 PM PST72,70011.9
2024-01-12 05:00Jan 11, 9:00 PM PST70,50011.6
2024-01-12 06:00Jan 11, 10:00 PM PST73,90011.6
2024-01-12 07:00Jan 11, 11:00 PM PST79,90011.5
2024-01-12 08:00Jan 12, 12:00 AM PST85,30011.6
2024-01-12 09:00Jan 12, 1:00 AM PST88,50011.6
2024-01-12 10:00Jan 12, 2:00 AM PST93,10011.5
2024-01-12 11:00Jan 12, 3:00 AM PST96,60011.5
2024-01-12 12:00Jan 12, 4:00 AM PST98,40011.5
2024-01-12 13:00Jan 12, 5:00 AM PST104,60011.6
2024-01-12 14:00Jan 12, 6:00 AM PST106,30011.6
2024-01-12 15:00Jan 12, 7:00 AM PST106,20011.7
2024-01-12 16:00Jan 12, 8:00 AM PST105,20011.6
2024-01-12 17:00Jan 12, 9:00 AM PST103,40011.6
2024-01-12 18:00Jan 12, 10:00 AM PST101,40011.5
2024-01-12 19:00Jan 12, 11:00 AM PST100,90011.4
2024-01-12 20:00Jan 12, 12:00 PM PST103,20011.5
2024-01-12 21:00Jan 12, 1:00 PM PST104,00011.3
2024-01-12 22:00Jan 12, 2:00 PM PST108,40011.5
2024-01-12 23:00Jan 12, 3:00 PM PST108,80011.3
2024-01-13 00:00Jan 12, 4:00 PM PST113,00011.4
2024-01-13 01:00Jan 12, 5:00 PM PST114,50011.5
2024-01-13 02:00Jan 12, 6:00 PM PST115,40011.6
2024-01-13 03:00Jan 12, 7:00 PM PST114,30011.7
2024-01-13 04:00Jan 12, 8:00 PM PST116,70012
2024-01-13 05:00Jan 12, 9:00 PM PST114,30012.1
2024-01-13 06:00Jan 12, 10:00 PM PST110,60011.7
2024-01-13 07:00Jan 12, 11:00 PM PST106,80011.6
2024-01-13 08:00Jan 13, 12:00 AM PST108,10011.5
2024-01-13 09:00Jan 13, 1:00 AM PST116,70011.8
2024-01-13 10:00Jan 13, 2:00 AM PST119,30011.7
2024-01-13 11:00Jan 13, 3:00 AM PST123,60011.8
2024-01-13 12:00Jan 13, 4:00 AM PST123,80011.7
2024-01-13 13:00Jan 13, 5:00 AM PST127,30011.8
2024-01-13 14:00Jan 13, 6:00 AM PST129,80011.8
2024-01-13 15:00Jan 13, 7:00 AM PST131,50011.9
2024-01-13 16:00Jan 13, 8:00 AM PST134,90011.9
2024-01-13 17:00Jan 13, 9:00 AM PST131,60011.7
2024-01-13 18:00Jan 13, 10:00 AM PST128,90011.8
2024-01-13 19:00Jan 13, 11:00 AM PST129,80011.8
2024-01-13 20:00Jan 13, 12:00 PM PST129,00011.7
2024-01-13 21:00Jan 13, 1:00 PM PST128,30011.6
2024-01-13 22:00Jan 13, 2:00 PM PST132,40011.8
2024-01-13 23:00Jan 13, 3:00 PM PST133,70011.7
2024-01-14 00:00Jan 13, 4:00 PM PST136,70011.9
2024-01-14 01:00Jan 13, 5:00 PM PST136,20011.9
2024-01-14 02:00Jan 13, 6:00 PM PST135,90011.9
2024-01-14 03:00Jan 13, 7:00 PM PST134,50011.9
2024-01-14 04:00Jan 13, 8:00 PM PST134,00012.1
2024-01-14 05:00Jan 13, 9:00 PM PST134,30012.2
2024-01-14 06:00Jan 13, 10:00 PM PST132,80012.2
2024-01-14 07:00Jan 13, 11:00 PM PST128,50012.1
2024-01-14 08:00Jan 14, 12:00 AM PST123,90011.9
2024-01-14 09:00Jan 14, 1:00 AM PST126,00012
2024-01-14 10:00Jan 14, 2:00 AM PST127,60012
2024-01-14 11:00Jan 14, 3:00 AM PST125,90011.8
2024-01-14 12:00Jan 14, 4:00 AM PST125,60011.8
2024-01-14 13:00Jan 14, 5:00 AM PST127,80011.8
2024-01-14 14:00Jan 14, 6:00 AM PST133,00012
2024-01-14 15:00Jan 14, 7:00 AM PST129,40011.9
2024-01-14 16:00Jan 14, 8:00 AM PST129,60011.9
2024-01-14 17:00Jan 14, 9:00 AM PST130,70012
2024-01-14 18:00Jan 14, 10:00 AM PST130,30012.2
2024-01-14 19:00Jan 14, 11:00 AM PST125,80012
2024-01-14 20:00Jan 14, 12:00 PM PST122,60012
2024-01-14 21:00Jan 14, 1:00 PM PST121,60011.9
2024-01-14 22:00Jan 14, 2:00 PM PST120,60011.9
2024-01-14 23:00Jan 14, 3:00 PM PST121,60011.8
2024-01-15 00:00Jan 14, 4:00 PM PST122,40011.8
2024-01-15 01:00Jan 14, 5:00 PM PST124,10011.9
2024-01-15 02:00Jan 14, 6:00 PM PST122,80011.6
2024-01-15 03:00Jan 14, 7:00 PM PST126,00011.8
2024-01-15 04:00Jan 14, 8:00 PM PST127,40012
2024-01-15 05:00Jan 14, 9:00 PM PST127,10012
2024-01-15 06:00Jan 14, 10:00 PM PST126,70012.1
2024-01-15 07:00Jan 14, 11:00 PM PST125,80012
2024-01-15 08:00Jan 15, 12:00 AM PST123,60012
2024-01-15 09:00Jan 15, 1:00 AM PST124,40011.9
2024-01-15 10:00Jan 15, 2:00 AM PST123,60011.9
2024-01-15 11:00Jan 15, 3:00 AM PST123,90011.8
2024-01-15 12:00Jan 15, 4:00 AM PST125,60011.7
2024-01-15 13:00Jan 15, 5:00 AM PST126,30011.7
2024-01-15 14:00Jan 15, 6:00 AM PST128,20011.6
2024-01-15 15:00Jan 15, 7:00 AM PST134,50012
2024-01-15 16:00Jan 15, 8:00 AM PST137,40012
2024-01-15 17:00Jan 15, 9:00 AM PST135,00012
2024-01-15 18:00Jan 15, 10:00 AM PST136,90012.1
2024-01-15 19:00Jan 15, 11:00 AM PST137,40012.3
2024-01-15 20:00Jan 15, 12:00 PM PST134,60012.1
2024-01-15 21:00Jan 15, 1:00 PM PST132,80012.1
2024-01-15 22:00Jan 15, 2:00 PM PST130,50012.1
2024-01-15 23:00Jan 15, 3:00 PM PST129,60012.1
2024-01-16 00:00Jan 15, 4:00 PM PST135,60012.3
2024-01-16 01:00Jan 15, 5:00 PM PST130,20011.8
2024-01-16 02:00Jan 15, 6:00 PM PST131,50011.9
2024-01-16 03:00Jan 15, 7:00 PM PST131,10011.8
2024-01-16 04:00Jan 15, 8:00 PM PST131,50011.8
2024-01-16 05:00Jan 15, 9:00 PM PST132,70011.8
2024-01-16 06:00Jan 15, 10:00 PM PST132,60011.8
2024-01-16 07:00Jan 15, 11:00 PM PST134,30012
2024-01-16 08:00Jan 16, 12:00 AM PST134,90012.1
2024-01-16 09:00Jan 16, 1:00 AM PST130,60011.9
2024-01-16 10:00Jan 16, 2:00 AM PST130,50011.9
2024-01-16 11:00Jan 16, 3:00 AM PST129,20011.8
2024-01-16 12:00Jan 16, 4:00 AM PST129,00011.7
2024-01-16 13:00Jan 16, 5:00 AM PST128,80011.7
2024-01-16 14:00Jan 16, 6:00 AM PST129,00011.6
2024-01-16 15:00Jan 16, 7:00 AM PST132,90011.8
2024-01-16 16:00Jan 16, 8:00 AM PST136,00011.8
2024-01-16 17:00Jan 16, 9:00 AM PST136,50012
2024-01-16 18:00Jan 16, 10:00 AM PST137,70012
2024-01-16 19:00Jan 16, 11:00 AM PST137,90012.1
2024-01-16 20:00Jan 16, 12:00 PM PST134,10012
2024-01-16 21:00Jan 16, 1:00 PM PST134,60012.1
2024-01-16 22:00Jan 16, 2:00 PM PST133,90012
2024-01-16 23:00Jan 16, 3:00 PM PST133,20012
2024-01-17 00:00Jan 16, 4:00 PM PST131,60011.8
2024-01-17 01:00Jan 16, 5:00 PM PST130,20011.9
2024-01-17 02:00Jan 16, 6:00 PM PST132,10011.9
2024-01-17 03:00Jan 16, 7:00 PM PST130,60011.7
2024-01-17 04:00Jan 16, 8:00 PM PST131,10011.8
2024-01-17 05:00Jan 16, 9:00 PM PST132,40011.7
2024-01-17 06:00Jan 16, 10:00 PM PST133,60011.8
2024-01-17 07:00Jan 16, 11:00 PM PST131,70011.8
2024-01-17 08:00Jan 17, 12:00 AM PST131,60011.9
2024-01-17 09:00Jan 17, 1:00 AM PST121,90011.4
2024-01-17 10:00Jan 17, 2:00 AM PST121,80011.4
2024-01-17 11:00Jan 17, 3:00 AM PST120,90011.5
2024-01-17 12:00Jan 17, 4:00 AM PST123,70011.5
2024-01-17 13:00Jan 17, 5:00 AM PST122,80011.4
2024-01-17 14:00Jan 17, 6:00 AM PST123,10011.4
2024-01-17 15:00Jan 17, 7:00 AM PST125,50011.5
2024-01-17 16:00Jan 17, 8:00 AM PST124,90011.7
2024-01-17 17:00Jan 17, 9:00 AM PST133,90011.8
2024-01-17 18:00Jan 17, 10:00 AM PST126,40011.5
2024-01-17 19:00Jan 17, 11:00 AM PST123,60011.8
2024-01-17 20:00Jan 17, 12:00 PM PST120,90011.9
2024-01-17 21:00Jan 17, 1:00 PM PST114,50011.9
2024-01-17 22:00Jan 17, 2:00 PM PST101,50011.3
2024-01-17 23:00Jan 17, 3:00 PM PST101,80011.5
2024-01-18 00:00Jan 17, 4:00 PM PST102,20011.4
2024-01-18 01:00Jan 17, 5:00 PM PST105,40011.5
2024-01-18 02:00Jan 17, 6:00 PM PST105,40011.4
2024-01-18 03:00Jan 17, 7:00 PM PST108,30011.5
2024-01-18 04:00Jan 17, 8:00 PM PST110,30011.4
2024-01-18 05:00Jan 17, 9:00 PM PST111,80011.4
2024-01-18 06:00Jan 17, 10:00 PM PST114,30011.5
2024-01-18 07:00Jan 17, 11:00 PM PST116,10011.6
2024-01-18 08:00Jan 18, 12:00 AM PST115,10011.6
2024-01-18 09:00Jan 18, 1:00 AM PST113,60011.6
2024-01-18 10:00Jan 18, 2:00 AM PST111,50011.5
2024-01-18 11:00Jan 18, 3:00 AM PST111,00011.4
2024-01-18 12:00Jan 18, 4:00 AM PST111,30011.3
2024-01-18 13:00Jan 18, 5:00 AM PST113,80011.3
2024-01-18 14:00Jan 18, 6:00 AM PST116,20011.3
2024-01-18 15:00Jan 18, 7:00 AM PST118,30011.3
2024-01-18 16:00Jan 18, 8:00 AM PST124,60011.5
2024-01-18 17:00Jan 18, 9:00 AM PST125,40011.5
2024-01-18 18:00Jan 18, 10:00 AM PST125,90011.6
2024-01-18 19:00Jan 18, 11:00 AM PST126,30011.6
2024-01-18 20:00Jan 18, 12:00 PM PST120,90011.5
2024-01-18 21:00Jan 18, 1:00 PM PST120,60011.7
2024-01-18 22:00Jan 18, 2:00 PM PST115,70011.6
2024-01-18 23:00Jan 18, 3:00 PM PST115,90011.5
2024-01-19 00:00Jan 18, 4:00 PM PST115,50011.5
2024-01-19 01:00Jan 18, 5:00 PM PST117,50011.6
2024-01-19 02:00Jan 18, 6:00 PM PST112,30011.3
2024-01-19 03:00Jan 18, 7:00 PM PST116,30011.4
2024-01-19 04:00Jan 18, 8:00 PM PST118,90011.4
2024-01-19 05:00Jan 18, 9:00 PM PST119,60011.4
2024-01-19 06:00Jan 18, 10:00 PM PST120,60011.4
2024-01-19 07:00Jan 18, 11:00 PM PST121,70011.4
2024-01-19 08:00Jan 19, 12:00 AM PST122,60011.4
2024-01-19 09:00Jan 19, 1:00 AM PST122,70011.4
2024-01-19 10:00Jan 19, 2:00 AM PST124,80011.4
2024-01-19 11:00Jan 19, 3:00 AM PST126,40011.6
2024-01-19 12:00Jan 19, 4:00 AM PST126,00011.5
2024-01-19 13:00Jan 19, 5:00 AM PST124,70011.5
2024-01-19 14:00Jan 19, 6:00 AM PST124,40011.4
2024-01-19 15:00Jan 19, 7:00 AM PST123,50011.4
2024-01-19 16:00Jan 19, 8:00 AM PST128,10011.6
2024-01-19 17:00Jan 19, 9:00 AM PST128,30011.6
2024-01-19 18:00Jan 19, 10:00 AM PST128,40011.6
2024-01-19 19:00Jan 19, 11:00 AM PST127,80011.7
2024-01-19 20:00Jan 19, 12:00 PM PST127,30011.7
2024-01-19 21:00Jan 19, 1:00 PM PST122,50011.6
2024-01-19 22:00Jan 19, 2:00 PM PST119,70011.6
2024-01-19 23:00Jan 19, 3:00 PM PST114,20011.5
2024-01-20 00:00Jan 19, 4:00 PM PST113,20011.6
2024-01-20 01:00Jan 19, 5:00 PM PST112,80011.6
2024-01-20 02:00Jan 19, 6:00 PM PST110,80011.3
2024-01-20 03:00Jan 19, 7:00 PM PST111,00011.4
2024-01-20 04:00Jan 19, 8:00 PM PST118,60011.7
2024-01-20 05:00Jan 19, 9:00 PM PST117,80011.5
2024-01-20 06:00Jan 19, 10:00 PM PST117,30011.5
2024-01-20 07:00Jan 19, 11:00 PM PST119,20011.5
2024-01-20 08:00Jan 20, 12:00 AM PST119,60011.5

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

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

Operating

7 of 20 units changed since the baseline inventory: 1 status changed (August 2026); 10 entered service (August 2026); 18 entered service (August 2026); 5 entered service (August 2026); and 3 more.

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 ↗
979.8MW
· 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

20 of 20 current and historical generators included.

Preliminary Monthly Electric Generator Inventory, August 2026; plant_id_eia=3075; report_date=2026-08-01

Publisher & attribution ↗ Cite this released fact ↗
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

20 of 20 current and historical generators included.

Preliminary Monthly Electric Generator Inventory, August 2026; plant_id_eia=3075; report_date=2026-08-01

Publisher & attribution ↗ Cite this released fact ↗
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

20 of 20 current and historical generators included.

Preliminary Monthly Electric Generator Inventory, August 2026; plant_id_eia=3075; report_date=2026-08-01

Publisher & attribution ↗ Cite this released fact ↗
Units whose current EIA-860M assertion differs from the baseline inventory year.
UnitChangeAs ofBaseline → latest statusNameplate · MW
1status changedAugust 2026OP → OA53.5MW → 53.5MW
10entered serviceAugust 2026OA → OP62.1MW → 62.1MW
18entered serviceAugust 2026OA → OP66.5MW → 66.5MW
5entered serviceAugust 2026OA → OP62.1MW → 62.1MW
6entered serviceAugust 2026OA → OP62.1MW → 62.1MW
7entered serviceAugust 2026OA → OP62.1MW → 62.1MW
8entered serviceAugust 2026OA → OP62.1MW → 62.1MW

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
1Standby or out of serviceJuly 1938——53.5MW
10OperatingJanuary 1944——62.1MW
11OperatingOctober 1982——66.5MW
12OperatingOctober 1982——66.5MW
13OperatingOctober 1982——66.5MW
14OperatingJune 1982——66.5MW
15OperatingMarch 1982——66.5MW
16OperatingDecember 1981——66.5MW
17OperatingSeptember 1981——66.5MW
18OperatingMay 1981——66.5MW
2Standby or out of serviceAugust 1938——53.5MW
3OperatingJanuary 1941——62.1MW
4OperatingFebruary 1941——62.1MW
5OperatingOctober 1941——62.1MW
6OperatingJune 1942——62.1MW
7OperatingApril 1943——62.1MW
8OperatingJuly 1943——62.1MW
9Standby or out of serviceOctober 1943——62.1MW
F1OperatingJanuary 1982——13.1MW
F2Standby or out of serviceNovember 1981——13.1MW

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: Bonneville Power Administration

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
20count
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=3075

Publisher & attribution ↗ Cite this released fact ↗
Operating generators
11count
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=3075

Publisher & attribution ↗ Cite this released fact ↗
Nameplate capacity, existing but not operating (standby / out of service)
505.7MW
Source & method

Sum of generator nameplate MW with status category existing and code other than OP (SB, OS, OA)

2024 inventory · reported · derived · valid · final

out_eia__yearly_generators.parquet; report_date=2024-01-01; plant_id_eia=3075

Publisher & attribution ↗ Cite this released fact ↗

Sources for this record

Frozen citation page ↗

Existing Hydropower Assets (EHA) Plant Database, 2026 (published 2026-07-06, revised 2026-07-16; DOI 10.21951/EHA_FY2026/3374497)

Megan M. Johnson, Shih-Chieh Kao and Rocio Uría-Martínez. 2026. Existing Hydropower Assets (EHA) Plant Database, 2026. HydroSource. Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA. DOI: 10.21951/EHA_FY2026/3374497

Only the EHA plant identifier, plant name and water body of reviewed rows are republished, as identity beside the EIA plant; EHA capacity and generation are not loaded and never enter any total. An EHA record without an EIA plant id has no entity here.

Original source ↗Method & license

Hydropower Infrastructure – LAkes, Reservoirs, and RIvers (HILARRI), Version 4 (2026-05-05; DOI 10.21951/HILARRI/3362570; links EHA 2025 plants to NID dams of 2025-08-18, GRanD v1.3, NHDPlusV2 and HUC12)

Hansen, C. H., Matson, P. G., Bozeman, B. B., Turner, S. W. D. 2026. Hydropower Infrastructure – LAkes, Reservoirs, and RIvers (HILARRI) v4. HydroSource. Oak Ridge National Laboratory, Oak Ridge, Tennessee, USA. DOI: 10.21951/HILARRI/3362570

A crosswalk of identifiers, not attributes: the HILARRI row id and its GRanD, NHDPlusV2 flowline and HUC12 ids are republished for reviewed rows only. HILARRI's own quality flags are kept on each row; a link is not a reservoir volume, a flow or a generation series.

Original source ↗Method & license

National Inventory of Dams, national export dated 2026-09-11 (dam id, name, river, purposes and coordinates used to verify each HILARRI dam link)

U.S. Army Corps of Engineers, National Inventory of Dams (export of 2026-09-11)

The NID id and dam name identify the structure the plant sits at, as HILARRI links it and the 2026-09-11 export confirms it. NID purposes are recorded on the row as the inventory states them (Grand Coulee's NID record lists no hydroelectric purpose). Dam height, storage and hazard fields are not loaded.

Original source ↗Method & license

Display names and aliases (pipeline/config/crosswalks/aliases.csv)

Display names verified against each organization's own website; EIA legal names retained as aliases

A display name is the name an organization uses for itself; the EIA name stays searchable and on the record. Each row cites the page that shows the name.

Original source ↗Method & license

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)

Original source ↗Method & license

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)

Original source ↗Method & license

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)

Original source ↗Method & license

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)

Original source ↗Method & license

CWMS Data API revised (CBT-REV) series for the January 2024 episode window at Grand Coulee (office NWDP, location GCL: hourly forebay elevation, hourly outflow, daily inflow), Lower Granite (LWG: hourly outflow and spill) and Bonneville (BON: hourly outflow and tailwater elevation), the location records that key the four Lower Snake dams (LWG, LGS, LMN, IHR) and every reviewed dam USACE's NIDID alias group names

U.S. Army Corps of Engineers, Northwestern Division, CWMS Data API (revised CBT series, as served at retrieval)

USACE's revised hourly and daily series for three projects over one episode window, and the keys of six, as the CWMS Data API served them at the retrieval time recorded in the manifest. The API serves them unversioned and USACE revises values in place, so a later retrieval can differ; each value keeps the CWMS quality code it was served with. Elevation is feet above the location's own vertical datum; flows are cubic feet per second. The Lower Snake series this API served nothing for come from USACE's Dataquery (usace-dataquery-history), never mixed with these. Water quantities, not generation. Grand Coulee storage is not shown until its capacity-table basis is settled.

Original source ↗Method & license

Release 20260929T050546Z-51ae0f7d3c78 · Record JSON