Data last collected:
PowerPlantFactsEvidence report · prepared 19 October 2026https://powerplantfacts.com/entity/3084
EIA plant 3084
Umatilla · Umatilla · OR
McNary
Operated by USACE Northwestern Division
Published location
Where is McNary?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
45.940200, -119.298800
Open the interactive map ↗Map data © OpenStreetMap contributors
Capacity is not generation. Nameplate MW describes equipment; annual MWh describes recorded output. Proposed and retired units are not added to operating capacity.
Equipment mix
Operating capacity by technology
Grouped from this plant’s represented generator records. Use the OR plant index for regional peers.
See the evidence
Electricity output across the year
Monthly net generation shows the seasonal shape of this plant's represented output. A negative value is retained when the source reports net consumption.
1373,446
2359,717
3427,502
4252,858
5193,351
6209,170
7219,223
8318,646
9263,242
10255,144
11364,258
12431,725
MWh net generation · 2024 final edition · EIA 923 represented operating rows. 12 of 12 supplied rows shown; 0 missing values omitted. Months with no reported numeric value are omitted, not treated as zero.
Read the chart as a table
| Record | MWh net generation |
|---|---|
| 1 | 373,446 |
| 2 | 359,717 |
| 3 | 427,502 |
| 4 | 252,858 |
| 5 | 193,351 |
| 6 | 209,170 |
| 7 | 219,223 |
| 8 | 318,646 |
| 9 | 263,242 |
| 10 | 255,144 |
| 11 | 364,258 |
| 12 | 431,725 |
2024 monthly net generation
| Month | Net generation |
|---|---|
| 1 | 373,446 MWh |
| 2 | 359,717 MWh |
| 3 | 427,502 MWh |
| 4 | 252,858 MWh |
| 5 | 193,351 MWh |
| 6 | 209,170 MWh |
| 7 | 219,223 MWh |
| 8 | 318,646 MWh |
| 9 | 263,242 MWh |
| 10 | 255,144 MWh |
| 11 | 364,258 MWh |
| 12 | 431,725 MWh |
Operating generators
| ID | Technology | Fuel | MW | Status |
|---|---|---|---|---|
| 14 | Conventional Hydroelectric | WAT | 80.5 | OP |
| 1 | Conventional Hydroelectric | WAT | 70 | OP |
| 10 | Conventional Hydroelectric | WAT | 70 | OP |
| 11 | Conventional Hydroelectric | WAT | 70 | OP |
| 12 | Conventional Hydroelectric | WAT | 70 | OP |
| 13 | Conventional Hydroelectric | WAT | 70 | OP |
| 2 | Conventional Hydroelectric | WAT | 70 | OP |
| 3 | Conventional Hydroelectric | WAT | 70 | OA |
| 4 | Conventional Hydroelectric | WAT | 70 | OA |
| 5 | Conventional Hydroelectric | WAT | 70 | OP |
| 6 | Conventional Hydroelectric | WAT | 70 | OP |
| 7 | Conventional Hydroelectric | WAT | 70 | OP |
| 8 | Conventional Hydroelectric | WAT | 70 | OP |
| 9 | Conventional Hydroelectric | WAT | 70 | OP |
Continue exploring
Similar-capacity plants in the same state
Identity, technology and limitations
EIA plant ID
3084
Sector
Electric Utility
Water source
Columbia And Snake Rivers
Data edition
2024-final
Use this record
Questions this evidence can answer
01What exactly is this record?
Use the name, place, date and identifiers above to confirm that you have the right McNary power plant: capacity and generation | PowerPlantFacts record.
02What does the evidence establish?
Read the reported values with their units, coverage dates and source notes. Keep observed facts separate from estimates or interpretation.
03What should I verify next?
Follow the primary-source links and check the limitations before using this evidence for a decision, comparison or citation.
A closer look at McNary
Variation in the published months
Across 12 numeric monthly generation entries, 12 has the highest recorded value (431,725 MWh) and 5 the lowest (193,351 MWh). Their difference is 238,374 MWh. Missing months have not been treated as zero.
Reading the MW column
In the 14 numeric rows displayed in this table, MW ranges from 70 (1, 10, 11) to 80.5 (14). The difference is 10.5 in the column's stated units. This summary covers the displayed rows and retains the table's period and scope.
Generator capacity in different operating conditions
| Generator ID | Technology | Nameplate MW | Summer MW | Winter MW | Minimum load MW |
|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | 70.0 | 70.0 | 70.0 | 23.8 |
| 10 | Conventional Hydroelectric | 70.0 | 70.0 | 70.0 | 23.8 |
| 11 | Conventional Hydroelectric | 70.0 | 70.0 | 70.0 | 23.8 |
| 12 | Conventional Hydroelectric | 70.0 | 70.0 | 70.0 | 23.8 |
| 13 | Conventional Hydroelectric | 70.0 | 70.0 | 70.0 | 23.8 |
| 14 | Conventional Hydroelectric | 80.5 | 80.5 | 80.5 | 23.8 |
| 2 | Conventional Hydroelectric | 70.0 | 70.0 | 70.0 | 23.8 |
| 3 | Conventional Hydroelectric | 70.0 | 70.0 | 70.0 | 23.8 |
| 4 | Conventional Hydroelectric | 70.0 | 70.0 | 70.0 | 23.8 |
| 5 | Conventional Hydroelectric | 70.0 | 58.0 | 58.0 | 23.8 |
| 6 | Conventional Hydroelectric | 70.0 | 58.0 | 58.0 | 23.8 |
| 7 | Conventional Hydroelectric | 70.0 | 70.0 | 70.0 | 23.8 |
| 8 | Conventional Hydroelectric | 70.0 | 70.0 | 70.0 | 23.8 |
| 9 | Conventional Hydroelectric | 70.0 | 70.0 | 70.0 | 23.8 |
EIA-860 2024 final source. Ratings describe capacity, not actual generation or availability. Missing ratings are not zero.
Source: US Energy Information Administration Form EIA-860 2024 plant and operable-generator workbooks; archive 2024. US EIA-authored information is generally public domain; cite EIA, preserve third-party exceptions, changes and no-endorsement context. Source-specific derived data.