Alder
46502 Mountain Highway East, La Grande, WA 98348Plant Summary Information
Alder is ranked #31 out of 70 hydroelectric power plants in Washington in terms of total annual net electricity generation.
Alder is comprised of 2 generators and generated 48.5 GWh during the 3-month period between September 2025 to December 2025.
| Plant Name | Alder |
|---|---|
| Utility Name | City of Tacoma - (WA) |
| Location | Pierce County, WA |
| Initial Operation Date | December 1945 |
| Last Update | Dec 2025 |
| Annual Generation | 187.0 GWh |
| Annual Consumption | 720.7 k MMBtu |
| Ranked #2,629 out of 13,081 Power Plants Nationwide | |
| Ranked #223 out of 1,311 Water Power Plants Nationwide | |
| Ranked #64 out of 131 Washington Power Plants | |
| Ranked #31 out of 70 Washington Water Power Plants | |
| Fuel Types | Water |
| Previous Operator |
City of Tacoma - (WA) (2013 to 2015) City of Tacoma - (WA) (2016 to 2025) |
Map of Alder
Full Screen MapRegister Now for Comprehensive Access
Subscribe now to access all power plant data, utility information, FERC EQR data, and more for Alder.
Monthly Net Generation for Alder
Monthly Plant Fuel Consumption for Alder
Alder Details
| Summary Information | |
|---|---|
| Plant Name | Alder (3913) |
| Plant Address | 46502 Mountain Highway East, La Grande, WA 98348 |
| Utility | City of Tacoma - (WA) (18429) |
| Latitude, Longitude | 46.8016, -122.3102 |
| Generation Dates on File | Jan 2001 to Dec 2025 |
| Initial Operation Date | December 1945 |
| Annual Generation | 187.0 GWh |
| 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 | City of Tacoma, Department of Public Utilities, Light Division (TPWR) |
| NAICS Code | Utilities (22) |
| Sector | Electric Utility (1) |
| Water Source | Nisqually River |
| Ash Impoundment | No |
| Transmission / Distribution Owner | City of Tacoma - (WA) (18429) WA |
| Grid Voltage | 110.00 kV |
| Energy Storage | No |
Generator 12 Details Operating December 1945
| Technology | Conventional Hydroelectric |
|---|---|
| Prime Mover | Hydroelectric Turbine |
| Ownership | Single Owner |
| Nameplate Capacity | 25 MW |
| Nameplate Power Factor | 1 |
| Summer Capacity | 25.2 MW |
| Winter Capacity | 21 MW |
| Minimum Load | 4 MW |
| Uprate/Derate Completed | No |
|---|---|
| Status | Operating |
| First Operation Date | December 1945 |
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Water |
| Time From Cold Shutdown To Full Load | 1H |
Generator 11 Details Operating May 1947
| Technology | Conventional Hydroelectric |
|---|---|
| Prime Mover | Hydroelectric Turbine |
| Ownership | Single Owner |
| Nameplate Capacity | 26 MW |
| Nameplate Power Factor | 0.95 |
| Summer Capacity | 25.8 MW |
| Winter Capacity | 21 MW |
| Minimum Load | 4 MW |
| Uprate/Derate Completed | No |
|---|---|
| Status | Operating |
| First Operation Date | May 1947 |
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Water |
| Time From Cold Shutdown To Full Load | 1H |
Alder 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 |
|---|---|---|---|
| #213 | Bucks Creek | Storrie, CA | 192.0 GWh |
| #214 | Denison | Denison, TX | 191.9 GWh |
| #215 | Cheatham | Ashland City, TN | 191.4 GWh |
| #216 | Thurlow Dam | Tallassee, AL | 191.0 GWh |
| #217 | Racine | Racine, OH | 190.0 GWh |
| #218 | Little Falls (WA) | Ford, WA | 188.8 GWh |
| #219 | Nantahala | Topton, NC | 188.4 GWh |
| #220 | Norfork | Salesville, AR | 187.6 GWh |
| #221 | Weiss Dam | Leesburg, AL | 187.6 GWh |
| #222 | Roanoke Rapids | Roanoke Rapids, NC | 187.2 GWh |
| #224 | Richard B Russell | Elberton, GA | 183.2 GWh |
| #225 | Narrows 2 | Browns Valley, CA | 181.2 GWh |
| #226 | H Neely Henry Dam | Ohatchee, AL | 180.9 GWh |
| #227 | Edison Sault | Sault Ste. Marie, MI | 180.8 GWh |
| #228 | Prospect 2 | Prospect, OR | 180.1 GWh |
| #229 | Albeni Falls | Oldtown, ID | 177.0 GWh |
| #230 | Kern River 1 | Bakersfield, CA | 175.7 GWh |
| #231 | Webbers Falls | Webbers Falls, OK | 174.3 GWh |
| #232 | Hudson Falls Hydroelectric Project | South Glens Falls, NY | 170.4 GWh |
| #233 | Carmen Smith | McKenzie Bridge, OR | 167.9 GWh |
Nearby Power Plants
Below are closest 20 power plants surrounding Alder.
| Plant Name | Plant Location | Annual Generation | Distance |
|---|---|---|---|
| Cedar Falls (WA) | North Bend, WA | 53.6 GWh | 49.4 mi |
| Cedar Hills | Maple Valley, WA | 53.0 MWh | 46.9 mi |
| Chehalis Generating Facility | Chehalis, WA | 2.3 TWh | 31.1 mi |
| Cowlitz Falls | Randle, WA | 195.6 GWh | 25.1 mi |
| Crystal Mountain | Greenwater, WA | 775.0 MWh | 40.8 mi |
| Frederickson | Tacoma, WA | 20.8 GWh | 19.4 mi |
| Frederickson Power LP | Tacoma, WA | 1.6 TWh | 19.8 mi |
| LaGrande | La Grande, WA | 291.2 GWh | 2.2 mi |
| LRI LFGTE Facility | Graham, WA | 33.2 GWh | 12.1 mi |
| Mayfield | Silver Creek, WA | 602.5 GWh | 24.5 mi |
| Mossyrock | Silver Creek, WA | 1.0 TWh | 19.2 mi |
| Packwood | Packwood, WA | 73.8 GWh | 37.9 mi |
| Skookumchuck | Tenino, WA | 1.8 GWh | 19.4 mi |
| Skookumchuck Wind Facility | Rainier, WA | 411.3 GWh | 17.1 mi |
| Snoqualmie | Snoqualmie, WA | 59.2 GWh | 55.7 mi |
| Swift 1 | Cougar, WA | 508.0 GWh | 51.4 mi |
| Transalta Centralia Generation | Centralia, WA | 3.2 TWh | 26.2 mi |
| Twin Falls Hydro | North Bend, WA | 59.3 GWh | 53.2 mi |
| Weeks Falls | North Bend, WA | 10.7 GWh | 53.6 mi |
| Yelm | Yelm, WA | 32.2 GWh | 19.5 mi |