Union Power Station
6434 Calion Hwy, El Dorado, AR 71730Plant Summary Information
Union Power Station is ranked #16 out of 2,221 natural gas power plants nationwide in terms of total annual net electricity generation.
Union Power Station is comprised of 12 generators and generated 1.1 TWh during the 3-month period between January 2025 to April 2025.
| Plant Name | Union Power Station |
|---|---|
| Utility Name | Entergy Arkansas LLC |
| Location | Union County, AR |
| Initial Operation Date | January 2003 |
| Last Update | Apr 2025 |
| Annual Generation | 9.3 TWh |
| Annual Consumption | 71.6 M MMBtu |
| Ranked #78 out of 12,299 Power Plants Nationwide | |
| Ranked #16 out of 2,221 Natural Gas Power Plants Nationwide | |
| Ranked #2 out of 97 Arkansas Power Plants | |
| Ranked #1 out of 22 Arkansas Natural Gas Power Plants | |
| Fuel Types | Natural Gas |
| Previous Operators |
Union Power Partners LP (2013 to 2015) Entergy Arkansas Inc (2016 to 2017) Entergy Arkansas LLC (2018 to 2024) |
Map of Union Power Station
Full Screen MapRegister Now for Comprehensive Access
Subscribe now to access all power plant data, utility information, FERC EQR data, and more for Union Power Station.
Monthly Net Generation for Union Power Station
Union Power Station Details
| Summary Information | |
|---|---|
| Plant Name | Union Power Station (55380) |
| Plant Address | 6434 Calion Hwy, El Dorado, AR 71730 |
| Utility | Entergy Arkansas LLC (814) |
| Latitude, Longitude | 33.29615, -92.58936 |
| Generation Dates on File | Jan 2004 to Apr 2025 |
| Initial Operation Date | January 2003 |
| Annual Generation | 9.3 TWh |
| Fuel Types | Natural Gas |
| Federal Energy Regulatory Commission (FERC) Information | |
| FERC Cogeneration Status | No |
| FERC Small Power Producer Status | No |
| FERC Exempt Wholesale Generator Status | Yes |
| FERC Exempt Wholesale Generator Docket Number | 99-56-000 |
| Regulatory Information | |
|---|---|
| Regulatory Status | Regulated |
| NERC Region | SERC |
| Balancing Authority | Midcontinent Independent Transmission System Operator, Inc.. (MISO) |
| NAICS Code | Utilities (22) |
| Sector | Electric Utility (1) |
| Water Source | Ouachita River |
| Ash Impoundment | No |
| Transmission / Distribution Owner | Entergy Arkansas Inc (814) AR |
| Grid Voltage | 500.00 kV |
| Energy Storage | No |
| Natural Gas Information | |
| Pipeline Name | Other - Please explain in pipeline notes below. |
| Pipeline Notes | Republic Midstream |
| Natural Gas Storage | No |
Generator CTG1 Details Operating January 2003
| Technology | Natural Gas Fired Combined Cycle |
|---|---|
| Prime Mover | Combined Cycle Combustion Turbine Part |
| Unit Code | BL01 |
| Ownership | Wholly Owned by Other Entity |
| Can Bypass Heat Recovery Steam Generator | No |
| RTO ISO LMP Node Designation | EAI.PUPP1_CT1 |
| RTO ISO Location Designation For Reporting Wholesale Sales Data | EAI.PUPP1_CT1 |
| Nameplate Capacity | 176 MW |
| Nameplate Power Factor | 0.85 |
| Minimum Load | 90 MW |
| Uprate/Derate Completed | No |
|---|---|
| Status | Operating |
| First Operation Date | January 2003 |
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Natural Gas |
| Time From Cold Shutdown To Full Load | OVER |
| Multiple Fuels | No |
| Cofire Fuels | No |
Generator CTG2 Details Operating January 2003
| Technology | Natural Gas Fired Combined Cycle |
|---|---|
| Prime Mover | Combined Cycle Combustion Turbine Part |
| Unit Code | BL01 |
| Ownership | Wholly Owned by Other Entity |
| Can Bypass Heat Recovery Steam Generator | No |
| RTO ISO LMP Node Designation | EAI.PUPP1_CT2 |
| RTO ISO Location Designation For Reporting Wholesale Sales Data | EAI.PUPP1_CT2 |
| Nameplate Capacity | 176 MW |
| Nameplate Power Factor | 0.85 |
| Minimum Load | 90 MW |
| Uprate/Derate Completed | No |
|---|---|
| Status | Operating |
| First Operation Date | January 2003 |
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Natural Gas |
| Time From Cold Shutdown To Full Load | OVER |
| Multiple Fuels | No |
| Cofire Fuels | No |
Generator STG1 Details Operating January 2003
| Technology | Natural Gas Fired Combined Cycle |
|---|---|
| Prime Mover | Combined Cycle Steam Part |
| Unit Code | BL01 |
| Ownership | Wholly Owned by Other Entity |
| Duct Burners | No |
| RTO ISO LMP Node Designation | EAI.PUPP1_ST |
| RTO ISO Location Designation For Reporting Wholesale Sales Data | EAI.PUPP1_ST |
| Nameplate Capacity | 255 MW |
| Nameplate Power Factor | 0.85 |
| Summer Capacity | 505 MW |
| Winter Capacity | 581.7 MW |
| Minimum Load | 140 MW |
|---|---|
| Uprate/Derate Completed | No |
| Status | Operating |
| First Operation Date | January 2003 |
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Natural Gas |
| Time From Cold Shutdown To Full Load | OVER |
| Multiple Fuels | No |
| Cofire Fuels | No |
Generator CTG3 Details Operating April 2003
| Technology | Natural Gas Fired Combined Cycle |
|---|---|
| Prime Mover | Combined Cycle Combustion Turbine Part |
| Unit Code | BL02 |
| Ownership | Single Owner |
| Can Bypass Heat Recovery Steam Generator | No |
| RTO ISO LMP Node Designation | EAI.PUPP_2A |
| RTO ISO Location Designation For Reporting Wholesale Sales Data | EAI.PUPP_2A |
| Nameplate Capacity | 176 MW |
| Nameplate Power Factor | 0.85 |
| Minimum Load | 90 MW |
| Uprate/Derate Completed | No |
|---|---|
| Status | Operating |
| First Operation Date | April 2003 |
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Natural Gas |
| Time From Cold Shutdown To Full Load | OVER |
| Multiple Fuels | No |
| Cofire Fuels | No |
Generator CTG4 Details Operating April 2003
| Technology | Natural Gas Fired Combined Cycle |
|---|---|
| Prime Mover | Combined Cycle Combustion Turbine Part |
| Unit Code | BL02 |
| Ownership | Single Owner |
| Can Bypass Heat Recovery Steam Generator | No |
| RTO ISO LMP Node Designation | EAI.PUPP_2B |
| RTO ISO Location Designation For Reporting Wholesale Sales Data | EAI.PUPP_2B |
| Nameplate Capacity | 176 MW |
| Nameplate Power Factor | 0.85 |
| Minimum Load | 90 MW |
| Uprate/Derate Completed | No |
|---|---|
| Status | Operating |
| First Operation Date | April 2003 |
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Natural Gas |
| Time From Cold Shutdown To Full Load | OVER |
| Multiple Fuels | No |
| Cofire Fuels | No |
Generator STG2 Details Operating April 2003
| Technology | Natural Gas Fired Combined Cycle |
|---|---|
| Prime Mover | Combined Cycle Steam Part |
| Unit Code | BL02 |
| Ownership | Single Owner |
| Duct Burners | No |
| RTO ISO LMP Node Designation | EAI_PUPP_2C |
| RTO ISO Location Designation For Reporting Wholesale Sales Data | EAI_PUPP_2C |
| Nameplate Capacity | 255 MW |
| Nameplate Power Factor | 0.85 |
| Summer Capacity | 507 MW |
| Winter Capacity | 571.6 MW |
| Minimum Load | 140 MW |
|---|---|
| Uprate/Derate Completed | No |
| Status | Operating |
| First Operation Date | April 2003 |
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Natural Gas |
| Time From Cold Shutdown To Full Load | OVER |
| Multiple Fuels | No |
| Cofire Fuels | No |
Generator CTG5 Details Operating May 2003
| Technology | Natural Gas Fired Combined Cycle |
|---|---|
| Prime Mover | Combined Cycle Combustion Turbine Part |
| Unit Code | BL03 |
| Ownership | Wholly Owned by Other Entity |
| Can Bypass Heat Recovery Steam Generator | No |
| RTO ISO LMP Node Designation | EAI.PUPP_3A |
| RTO ISO Location Designation For Reporting Wholesale Sales Data | EAI.PUPP_3A |
| Nameplate Capacity | 176 MW |
| Nameplate Power Factor | 0.85 |
| Minimum Load | 90 MW |
| Uprate/Derate Completed | No |
|---|---|
| Status | Operating |
| First Operation Date | May 2003 |
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Natural Gas |
| Time From Cold Shutdown To Full Load | OVER |
| Multiple Fuels | No |
| Cofire Fuels | No |
Generator CTG6 Details Operating May 2003
| Technology | Natural Gas Fired Combined Cycle |
|---|---|
| Prime Mover | Combined Cycle Combustion Turbine Part |
| Unit Code | BL03 |
| Ownership | Wholly Owned by Other Entity |
| Can Bypass Heat Recovery Steam Generator | No |
| RTO ISO LMP Node Designation | EAI.PUPP_3B |
| RTO ISO Location Designation For Reporting Wholesale Sales Data | EAI.PUPP_3B |
| Nameplate Capacity | 176 MW |
| Nameplate Power Factor | 0.85 |
| Minimum Load | 90 MW |
| Uprate/Derate Completed | No |
|---|---|
| Status | Operating |
| First Operation Date | May 2003 |
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Natural Gas |
| Time From Cold Shutdown To Full Load | OVER |
| Multiple Fuels | No |
| Cofire Fuels | No |
Generator STG3 Details Operating May 2003
| Technology | Natural Gas Fired Combined Cycle |
|---|---|
| Prime Mover | Combined Cycle Steam Part |
| Unit Code | BL03 |
| Ownership | Wholly Owned by Other Entity |
| Duct Burners | No |
| RTO ISO LMP Node Designation | EAI_PUPP_3C |
| RTO ISO Location Designation For Reporting Wholesale Sales Data | EAI_PUPP_3C |
| Nameplate Capacity | 255 MW |
| Nameplate Power Factor | 0.85 |
| Summer Capacity | 512 MW |
| Winter Capacity | 582.2 MW |
| Minimum Load | 140 MW |
|---|---|
| Uprate/Derate Completed | No |
| Status | Operating |
| First Operation Date | May 2003 |
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Natural Gas |
| Time From Cold Shutdown To Full Load | OVER |
| Multiple Fuels | No |
| Cofire Fuels | No |
Generator CTG7 Details Operating June 2003
| Technology | Natural Gas Fired Combined Cycle |
|---|---|
| Prime Mover | Combined Cycle Combustion Turbine Part |
| Unit Code | BL04 |
| Ownership | Wholly Owned by Other Entity |
| Can Bypass Heat Recovery Steam Generator | No |
| RTO ISO LMP Node Designation | EAI.PUPP_4A |
| RTO ISO Location Designation For Reporting Wholesale Sales Data | EAI.PUPP_4A |
| Nameplate Capacity | 176 MW |
| Nameplate Power Factor | 0.85 |
| Minimum Load | 90 MW |
| Uprate/Derate Completed | No |
|---|---|
| Status | Operating |
| First Operation Date | June 2003 |
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Natural Gas |
| Time From Cold Shutdown To Full Load | OVER |
| Multiple Fuels | No |
| Cofire Fuels | No |
Generator CTG8 Details Operating June 2003
| Technology | Natural Gas Fired Combined Cycle |
|---|---|
| Prime Mover | Combined Cycle Combustion Turbine Part |
| Unit Code | BL04 |
| Ownership | Wholly Owned by Other Entity |
| Can Bypass Heat Recovery Steam Generator | No |
| RTO ISO LMP Node Designation | EAI.PUPP_4B |
| RTO ISO Location Designation For Reporting Wholesale Sales Data | EAI.PUPP_4B |
| Nameplate Capacity | 176 MW |
| Nameplate Power Factor | 0.85 |
| Minimum Load | 90 MW |
| Uprate/Derate Completed | No |
|---|---|
| Status | Operating |
| First Operation Date | June 2003 |
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Natural Gas |
| Time From Cold Shutdown To Full Load | OVER |
| Multiple Fuels | No |
| Cofire Fuels | No |
Generator STG4 Details Operating June 2003
| Technology | Natural Gas Fired Combined Cycle |
|---|---|
| Prime Mover | Combined Cycle Steam Part |
| Unit Code | BL04 |
| Ownership | Wholly Owned by Other Entity |
| Duct Burners | No |
| RTO ISO LMP Node Designation | EAI_PUPP_4C |
| RTO ISO Location Designation For Reporting Wholesale Sales Data | EAI_PUPP_4C |
| Nameplate Capacity | 255 MW |
| Nameplate Power Factor | 0.85 |
| Summer Capacity | 513 MW |
| Winter Capacity | 582.6 MW |
| Minimum Load | 140 MW |
|---|---|
| Uprate/Derate Completed | No |
| Status | Operating |
| First Operation Date | June 2003 |
| Combined Heat & Power | No |
| Sector Name | Electric Utility (1) |
| Energy Source | Natural Gas |
| Time From Cold Shutdown To Full Load | OVER |
| Multiple Fuels | No |
| Cofire Fuels | No |
Union Power Station Plant Owners
| Owner Name | Address | Generator | Ownership |
|---|---|---|---|
| Entergy New Orleans, LLC | 1600 Perdido Street, New Orleans, LA 70112 | Generator CTG1 | 100.00% |
| Entergy New Orleans, LLC | 1600 Perdido Street, New Orleans, LA 70112 | Generator CTG2 | 100.00% |
| Entergy Louisiana LLC | 4809 Jefferson Highway, Jefferson, LA 70121 | Generator CTG5 | 100.00% |
| Entergy Louisiana LLC | 4809 Jefferson Highway, Jefferson, LA 70121 | Generator CTG6 | 100.00% |
| Entergy Louisiana LLC | 4809 Jefferson Highway, Jefferson, LA 70121 | Generator CTG7 | 100.00% |
| Entergy Louisiana LLC | 4809 Jefferson Highway, Jefferson, LA 70121 | Generator CTG8 | 100.00% |
| Entergy New Orleans, LLC | 1600 Perdido Street, New Orleans, LA 70112 | Generator STG1 | 100.00% |
| Entergy Louisiana LLC | 4809 Jefferson Highway, Jefferson, LA 70121 | Generator STG3 | 100.00% |
| Entergy Louisiana LLC | 4809 Jefferson Highway, Jefferson, LA 70121 | Generator STG4 | 100.00% |
Power Plants with Similar Net Generation
Power plants with a similar annual net generation from Natural Gas.
| Rank | Plant Name | Plant Location | Annual Generation |
|---|---|---|---|
| #6 | H Allen Franklin Combined Cycle | Smiths, AL | 12.1 TWh |
| #7 | Greensville County Power Station | Emporia, VA | 11.5 TWh |
| #8 | Guernsey Power Station | Byesville, OH | 11.5 TWh |
| #9 | Okeechobee Clean Energy Center | Okeechobee, FL | 11.2 TWh |
| #10 | Sherwood H Smith Jr Energy Complex | Hamlet, NC | 10.4 TWh |
| #11 | Midland Cogeneration Venture | Midland, MI | 10.1 TWh |
| #12 | Fort Myers | Ft. Myers, FL | 9.9 TWh |
| #13 | Lackawanna Energy Center | Jessup, PA | 9.7 TWh |
| #14 | Forney Energy Center | Forney, TX | 9.6 TWh |
| #15 | Warren County | Front Royal, VA | 9.3 TWh |
| #17 | Brunswick County Power Station | Freeman, VA | 9.2 TWh |
| #18 | Nine Mile Point | Westwego, LA | 9.0 TWh |
| #19 | York Energy Center | Delta, PA | 8.9 TWh |
| #20 | Sanford | DeBary, FL | 8.8 TWh |
| #21 | Hanging Rock Energy Facility | Ironton, OH | 8.4 TWh |
| #22 | Lawrenceburg Power, LLC | Lawrenceburg, IN | 8.4 TWh |
| #23 | Paradise | Drakesboro, KY | 8.3 TWh |
| #24 | Martin | Indiantown, FL | 8.2 TWh |
| #25 | Blue Water Energy Center | East China, MI | 8.2 TWh |
| #26 | Odessa-Ector Power Plant | Odessa, TX | 8.0 TWh |
Nearby Power Plants
Below are closest 20 power plants surrounding Union Power Station.
| Plant Name | Plant Location | Annual Generation | Distance |
|---|---|---|---|
| Ashley-Chicot Solar | Hamburg, AR | 2.2 GWh | 38.7 mi |
| Bayou Galion Solar Project | Mer Rouge, LA | 90.5 GWh | 58 mi |
| C&L | Star City, AR | 1.9 GWh | 69.4 mi |
| Crossett Solar | Crossett, AR | 112.6 GWh | 39.6 mi |
| Degray | Arkadelphia, AR | 189.7 GWh | 70 mi |
| General Dynamics | Hampton, AR | 3.6 GWh | 21.3 mi |
| Georgia-Pacific Crossett LLC | Crossett, AR | 4.4 GWh | 37.1 mi |
| Louisiana Tech University Power Plant | Ruston, LA | 42.3 GWh | 53.4 mi |
| McClellan (AR) | Camden, AR | 43.3 GWh | 21.9 mi |
| Oak Ridge Solar | Oak Ridge, LA | 451.0 GWh | 68.1 mi |
| Ouachita | Sterlington, LA | 4.0 TWh | 50.7 mi |
| Perryville Power Station | Sterlington, LA | 4.1 TWh | 53.3 mi |
| Plant 31 Paper Mill | West Monroe, LA | 523.0 GWh | 61.5 mi |
| Prairie Mist Solar | Montrose, AR | 105.9 GWh | 53.2 mi |
| SAU Tech | Bearden, AR | 1.9 GWh | 34.1 mi |
| South Central Electric Cooperative | Arkadelphia, AR | 2.1 GWh | 66.4 mi |
| SR Camden | Camden, AR | 23.3 GWh | 24.1 mi |
| Star City School District | Star City, AR | 2.8 GWh | 64.2 mi |
| Veolia (Gum Springs) | Arkadelphia, AR | 2.7 GWh | 60.1 mi |
| Westrock Hodge (LA) | Hodge, LA | 466.5 GWh | 71 mi |