Lower Monumental
5520 Devils Canyon Road, Kahlotus, WA 99335Plant Summary Information
Lower Monumental is ranked #33 out of 1,369 hydroelectric power plants nationwide in terms of total annual net electricity generation.
Lower Monumental is comprised of 6 generators and generated 349.5 GWh during the 3-month period between October 2024 to January 2025.
| Plant Name | Lower Monumental |
|---|---|
| Utility Name | USACE Northwestern Division |
| Location | Walla Walla County, WA |
| Initial Operation Date | June 1969 |
| Last Update | Jan 2025 |
| Annual Generation | 1.3 TWh |
| Annual Consumption | 4.9 M MMBtu |
| Ranked #633 out of 11,979 Power Plants Nationwide | |
| Ranked #33 out of 1,369 Water Power Plants Nationwide | |
| Ranked #21 out of 135 Washington Power Plants | |
| Ranked #12 out of 70 Washington Water Power Plants | |
| Fuel Types | Water |
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Monthly Net Generation for Lower Monumental
Lower Monumental Details
| Summary Information | |
|---|---|
| Plant Name | Lower Monumental (3927) |
| Plant Address | 5520 Devils Canyon Road, Kahlotus, WA 99335 |
| Utility | USACE Northwestern Division (19400) |
| Latitude, Longitude | 46.5635, -118.5397 |
| Generation Dates on File | Jan 2001 to Jan 2025 |
| Initial Operation Date | June 1969 |
| Annual Generation | 1.3 TWh |
| Fuel Types | Water |
| Federal Energy Regulatory Commission (FERC) Information | |
| FERC Cogeneration Status | No |
| FERC Small Power Producer Status | No |
| FERC Exempt Wholesale Generator Status | No |
| Regulatory Information | |
|---|---|
| Regulatory Status | Regulated |
| NERC Region | WECC |
| Balancing Authority | Bonneville Power Administration (BPAT) |
| NAICS Code | Utilities (22) |
| Sector | Electric Utility (1) |
| Water Source | Snake River |
| Ash Impoundment | No |
| Transmission / Distribution Owner | Bonneville Power Administration (1738) WA |
| Grid Voltage | 500.00 kV |
| Energy Storage | No |
Generator 2 Details Operating October 1969
| Technology | Conventional Hydroelectric |
|---|---|
| Prime Mover | Hydroelectric Turbine |
| Ownership | Single Owner |
| Nameplate Capacity | 135 MW |
| Nameplate Power Factor | 0.95 |
| Summer Capacity | 135 MW |
| Winter Capacity | 135 MW |
| Minimum Load | 53.8 MW |
| Uprate/Derate Completed | No |
| Status | Operating |
|---|---|
| First Operation Date | October 1969 |
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Water |
| Time From Cold Shutdown To Full Load | 10M |
| Other Planned Modifications | No |
| Multiple Fuels | No |
Generator 1 Details Operating June 1969
| Technology | Conventional Hydroelectric |
|---|---|
| Prime Mover | Hydroelectric Turbine |
| Ownership | Single Owner |
| Nameplate Capacity | 135 MW |
| Nameplate Power Factor | 0.95 |
| Summer Capacity | 135 MW |
| Winter Capacity | 135 MW |
| Minimum Load | 53.8 MW |
| Uprate/Derate Completed | No |
| Status | Operating |
|---|---|
| First Operation Date | June 1969 |
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Water |
| Time From Cold Shutdown To Full Load | 10M |
| Other Planned Modifications | No |
| Multiple Fuels | No |
Generator 3 Details Operating February 1970
| Technology | Conventional Hydroelectric |
|---|---|
| Prime Mover | Hydroelectric Turbine |
| Ownership | Single Owner |
| Nameplate Capacity | 135 MW |
| Nameplate Power Factor | 0.95 |
| Summer Capacity | 135 MW |
| Winter Capacity | 135 MW |
| Minimum Load | 53.8 MW |
| Uprate/Derate Completed | No |
| Status | Operating |
|---|---|
| First Operation Date | February 1970 |
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Water |
| Time From Cold Shutdown To Full Load | 10M |
| Other Planned Modifications | No |
| Multiple Fuels | No |
Generator 4 Details Operating March 1979
| Technology | Conventional Hydroelectric |
|---|---|
| Prime Mover | Hydroelectric Turbine |
| Ownership | Single Owner |
| Nameplate Capacity | 135 MW |
| Nameplate Power Factor | 0.95 |
| Summer Capacity | 135 MW |
| Winter Capacity | 135 MW |
| Minimum Load | 63.3 MW |
| Uprate/Derate Completed | No |
| Status | Operating |
|---|---|
| First Operation Date | March 1979 |
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Water |
| Time From Cold Shutdown To Full Load | 10M |
| Other Planned Modifications | No |
| Multiple Fuels | No |
Generator 5 Details Operating April 1979
| Technology | Conventional Hydroelectric |
|---|---|
| Prime Mover | Hydroelectric Turbine |
| Ownership | Single Owner |
| Nameplate Capacity | 135 MW |
| Nameplate Power Factor | 0.95 |
| Summer Capacity | 135 MW |
| Winter Capacity | 135 MW |
| Minimum Load | 63.3 MW |
| Uprate/Derate Completed | Yes |
| Uprate Or Derate Completed | April 2023 |
|---|---|
| Status | Operating |
| First Operation Date | April 1979 |
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Water |
| Time From Cold Shutdown To Full Load | 10M |
| Other Planned Modifications | No |
| Multiple Fuels | No |
Generator 6 Details Operating July 1979
| Technology | Conventional Hydroelectric |
|---|---|
| Prime Mover | Hydroelectric Turbine |
| Ownership | Single Owner |
| Nameplate Capacity | 135 MW |
| Nameplate Power Factor | 0.95 |
| Summer Capacity | 135 MW |
| Winter Capacity | 135 MW |
| Minimum Load | 63.3 MW |
| Uprate/Derate Completed | No |
| Status | Operating |
|---|---|
| First Operation Date | July 1979 |
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Water |
| Time From Cold Shutdown To Full Load | 10M |
| Other Planned Modifications | No |
| Multiple Fuels | No |
Lower Monumental Plant Owners
| Owner Name | Address | Generator | Ownership |
|---|---|---|---|
| We couldn't locate any owners for this plant | |||
Power Plants with Similar Net Generation
Power plants with a similar annual net generation from Water.
| Rank | Plant Name | Plant Location | Annual Generation |
|---|---|---|---|
| #23 | Conowingo | Darlington, MD | 1.6 TWh |
| #24 | Hoover Dam (NV) | Boulder City, NV | 1.6 TWh |
| #25 | Libby | Libby, MT | 1.6 TWh |
| #26 | Little Goose | Dayton, WA | 1.5 TWh |
| #27 | Fort Randall | Pickstown, SD | 1.5 TWh |
| #28 | Dworshak | Ahsahka, ID | 1.4 TWh |
| #29 | Hoover Dam (AZ) | Boulder City, AZ | 1.4 TWh |
| #30 | Ice Harbor | Burbank, WA | 1.4 TWh |
| #31 | Lower Granite | Pomeroy, WA | 1.3 TWh |
| #32 | Noxon Rapids | Noxon, MT | 1.3 TWh |
| #34 | Colgate | Dobbins, CA | 1.3 TWh |
| #35 | Kentucky Dam | Grand Rivers, KY | 1.2 TWh |
| #36 | Pickwick Landing Dam | Pickwick Dam, TN | 1.1 TWh |
| #37 | Wheeler Dam | Town Creek, AL | 1.1 TWh |
| #38 | Safe Harbor | Conestoga, PA | 989.2 GWh |
| #39 | Holtwood | Holtwood, PA | 949.8 GWh |
| #40 | Davis Dam | Kingman, AZ | 908.9 GWh |
| #41 | Oxbow (OR) | Oxbow, OR | 900.1 GWh |
| #42 | Yellowtail | Hardin, MT | 846.0 GWh |
| #43 | Keokuk | Keokuk, IA | 834.9 GWh |
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|---|---|---|---|
| Adams Nielson Solar | Lind, WA | 41.4 GWh | 27.3 mi |
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| FPL Energy Vansycle LLC (OR) | Touchet, OR | 230.3 GWh | 40.3 mi |
| FPL Energy Vansycle LLC (WA) | Touchet, WA | 331.4 GWh | 39.2 mi |
| Hopkins Ridge Wind | Dayton, WA | 398.1 GWh | 35 mi |
| Horn Rapids Solar, Storage and Training | Richland, WA | 6.6 GWh | 40 mi |
| Ice Harbor | Burbank, WA | 1.4 TWh | 27.1 mi |
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| Lower Snake River Wind Energy Project | Pomeroy, WA | 848.3 GWh | 34.2 mi |
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| Nine Canyon | Kennewick, WA | 194.7 GWh | 41.8 mi |
| Potholes East Canal 66.0 | Pasco, WA | 7.3 GWh | 36.3 mi |
| Rattlesnake Flat | Ritzville, WA | 403.9 GWh | 26.1 mi |
| Russell D Smith | Othello, WA | 17.0 GWh | 29.7 mi |
| Tucannon River Wind Farm | Dayton, WA | 678.5 GWh | 26.3 mi |
| Twin Reservoirs | Walla Walla, WA | 8.1 GWh | 35.5 mi |
| Vansycle | Touchet, OR | 61.7 GWh | 43.7 mi |