Union Power Station
6434 Calion Hwy, El Dorado, AR 71730Plant Summary Information
Union Power Station is ranked #15 out of 2,187 natural gas power plants nationwide in terms of total annual net electricity generation.
Union Power Station is comprised of 12 generators and generated 1.3 TWh during the 3-month period between December 2024 to March 2025.
| Plant Name | Union Power Station |
|---|---|
| Utility Name | Entergy Arkansas LLC |
| Location | Union County, AR |
| Initial Operation Date | January 2003 |
| Last Update | Mar 2025 |
| Annual Generation | 9.4 TWh |
| Annual Consumption | 74.0 M MMBtu |
| Ranked #72 out of 11,623 Power Plants Nationwide | |
| Ranked #15 out of 2,187 Natural Gas Power Plants Nationwide | |
| Ranked #2 out of 78 Arkansas Power Plants | |
| Ranked #1 out of 21 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 2023) |
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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 Mar 2025 |
| Initial Operation Date | January 2003 |
| Annual Generation | 9.4 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 | 506 MW |
| Winter Capacity | 574 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 | 504 MW |
| Winter Capacity | 570 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 | 511 MW |
| Winter Capacity | 570 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 | 510 MW |
| Winter Capacity | 580 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 |
|---|---|---|---|
| #5 | Hines Energy Complex | Bartow, FL | 12.3 TWh |
| #6 | H Allen Franklin Combined Cycle | Smiths, AL | 12.0 TWh |
| #7 | Guernsey Power Station | Byesville, OH | 11.5 TWh |
| #8 | Greensville County Power Station | Emporia, VA | 11.4 TWh |
| #9 | Okeechobee Clean Energy Center | Okeechobee, FL | 11.0 TWh |
| #10 | Sherwood H Smith Jr Energy Complex | Hamlet, NC | 10.4 TWh |
| #11 | Midland Cogeneration Venture | Midland, MI | 10.3 TWh |
| #12 | Forney Energy Center | Forney, TX | 10.0 TWh |
| #13 | Lackawanna Energy Center | Jessup, PA | 9.6 TWh |
| #14 | Fort Myers | Ft. Myers, FL | 9.6 TWh |
| #16 | Warren County | Front Royal, VA | 9.4 TWh |
| #17 | Brunswick County Power Station | Freeman, VA | 9.3 TWh |
| #18 | Nine Mile Point | Westwego, LA | 9.0 TWh |
| #19 | Sanford | DeBary, FL | 9.0 TWh |
| #20 | York Energy Center | Delta, PA | 9.0 TWh |
| #21 | Lawrenceburg Power, LLC | Lawrenceburg, IN | 8.4 TWh |
| #22 | Paradise | Drakesboro, KY | 8.4 TWh |
| #23 | South Field Energy | Wellsville, OH | 8.4 TWh |
| #24 | Seminole (FL) | Palatka, FL | 10.6 TWh |
| #25 | Hanging Rock Energy Facility | Ironton, OH | 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 | 69.6 GWh | 58 mi |
| C&L | Star City, AR | 2.2 GWh | 69.4 mi |
| Chicot Solar | Lake Village, AR | 214.4 GWh | 72.7 mi |
| Crossett Solar | AR | 92.6 GWh | 39.6 mi |
| Degray | Arkadelphia, AR | 157.6 GWh | 70 mi |
| Fulton (AR) | Fulton, AR | 148.8 GWh | 72.7 mi |
| General Dynamics | Hampton, AR | 3.4 GWh | 21.3 mi |
| Georgia-Pacific Crossett LLC | Crossett, AR | 4.4 GWh | 37.1 mi |
| Hot Spring Generating Facility | Malvern, AR | 2.1 TWh | 71 mi |
| John W Turk Jr Power Plant | Fulton, AR | 2.8 TWh | 74.6 mi |
| Louisiana Tech University Power Plant | Ruston, LA | 46.6 GWh | 53.4 mi |
| McClellan (AR) | Camden, AR | 41.1 GWh | 21.9 mi |
| Oak Ridge Solar | Oak Ridge, LA | 451.3 GWh | 68.1 mi |
| Ouachita | Sterlington, LA | 4.4 TWh | 50.7 mi |
| Perryville Power Station | Sterlington, LA | 4.3 TWh | 53.3 mi |
| Plant 31 Paper Mill | West Monroe, LA | 490.9 GWh | 61.5 mi |
| Prairie Mist Solar | Montrose, AR | 92.3 GWh | 53.2 mi |
| SR Camden | Camden, AR | 22.4 GWh | 24.1 mi |
| Westrock Hodge (LA) | Hodge, LA | 412.2 GWh | 71 mi |