Data last collected:
PowerPlantFactsEvidence report · prepared 19 October 2026https://powerplantfacts.com/entity/6175
EIA plant 6175
Pomeroy · Whitman · WA
Lower Granite
Operated by USACE Northwestern Division
Published location
Where is Lower Granite?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
46.659503, -117.429385
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 WA 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.
1115,773
2161,029
3192,364
471,557
578,464
6104,712
790,424
894,960
993,934
1076,806
1187,356
12106,142
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 | 115,773 |
| 2 | 161,029 |
| 3 | 192,364 |
| 4 | 71,557 |
| 5 | 78,464 |
| 6 | 104,712 |
| 7 | 90,424 |
| 8 | 94,960 |
| 9 | 93,934 |
| 10 | 76,806 |
| 11 | 87,356 |
| 12 | 106,142 |
2024 monthly net generation
| Month | Net generation |
|---|---|
| 1 | 115,773 MWh |
| 2 | 161,029 MWh |
| 3 | 192,364 MWh |
| 4 | 71,557 MWh |
| 5 | 78,464 MWh |
| 6 | 104,712 MWh |
| 7 | 90,424 MWh |
| 8 | 94,960 MWh |
| 9 | 93,934 MWh |
| 10 | 76,806 MWh |
| 11 | 87,356 MWh |
| 12 | 106,142 MWh |
Operating generators
| ID | Technology | Fuel | MW | Status |
|---|---|---|---|---|
| 1 | Conventional Hydroelectric | WAT | 135 | OP |
| 2 | Conventional Hydroelectric | WAT | 135 | OP |
| 3 | Conventional Hydroelectric | WAT | 135 | OP |
| 4 | Conventional Hydroelectric | WAT | 135 | OP |
| 5 | Conventional Hydroelectric | WAT | 135 | OP |
| 6 | Conventional Hydroelectric | WAT | 135 | OP |
Continue exploring
Similar-capacity plants in the same state
Identity, technology and limitations
EIA plant ID
6175
Sector
Electric Utility
Water source
Snake And Columbia 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 Lower Granite 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 Lower Granite
Variation in the published months
Across 12 numeric monthly generation entries, 3 has the highest recorded value (192,364 MWh) and 4 the lowest (71,557 MWh). Their difference is 120,807 MWh. Missing months have not been treated as zero.
Generator capacity in different operating conditions
| Generator ID | Technology | Nameplate MW | Summer MW | Winter MW | Minimum load MW |
|---|---|---|---|---|---|
| 1 | Conventional Hydroelectric | 135.0 | 135.0 | 135.0 | 110.0 |
| 2 | Conventional Hydroelectric | 135.0 | 127.0 | 127.0 | 46.4 |
| 3 | Conventional Hydroelectric | 135.0 | 135.0 | 135.0 | 46.4 |
| 4 | Conventional Hydroelectric | 135.0 | 135.0 | 135.0 | 57.5 |
| 5 | Conventional Hydroelectric | 135.0 | 135.0 | 135.0 | 57.5 |
| 6 | Conventional Hydroelectric | 135.0 | 135.0 | 135.0 | 57.5 |
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.