TNSG North Plant
Natural gas power plant in North Slope, Alaska. 25.4 MW of nameplate capacity across 4 generators, operated by TDX North Slope Generating Inc..
Also known as EIA plant 58278
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 25.4 MWNameplate
- Generators
- 4 operatingEIA-860M, August 2026
- Operating since
- January 2008First generator online
- Operator
- TDX North Slope Generating Inc.EIA operator ID 57494
- Grid
- Not reported
- Price nodes
- None linkedNo verified ISO node
- Location
- North Slope, AK70.2353, −148.3836
- EIA plant ID
- 58278EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power TNSG North Plant produces
Free · EIA-923Net generation, 2025
54.5 GWh
54,539 MWh, final
Capacity factor, 2025
24.2%
2024: 22.7%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
49.4–79.9
GWh a year. Low 2022, high 2015
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | Not reported | Not reported | 0 of 12 |
| 2002 | Not reported | Not reported | 0 of 12 |
| 2003 | Not reported | Not reported | 0 of 12 |
| 2004 | Not reported | Not reported | 0 of 12 |
| 2005 | Not reported | Not reported | 0 of 12 |
| 2006 | Not reported | Not reported | 0 of 12 |
| 2007 | Not reported | Not reported | 0 of 12 |
| 2008 | Not reported | Not reported | 0 of 12 |
| 2009 | Not reported | Not reported | 0 of 12 |
| 2010 | Not reported | Not reported | 0 of 12 |
| 2011 | Not reported | Not reported | 0 of 12 |
| 2012 | 35,559 | 37.8% | 12 of 12 |
| 2013 | 60,500 | Not reported | 12 of 12 |
| 2014 | 66,104 | Not reported | 12 of 12 |
| 2015 | 79,920 | 35.5% | 12 of 12 |
| 2016 | 72,702 | 32.2% | 12 of 12 |
| 2017 | 65,312 | 29.0% | 12 of 12 |
| 2018 | 61,008 | 27.1% | 12 of 12 |
| 2019 | 56,413 | 25.1% | 12 of 12 |
| 2020 | 55,955 | 24.8% | 12 of 12 |
| 2021 | 49,695 | 22.1% | 12 of 12 |
| 2022 | 49,378 | 21.9% | 12 of 12 |
| 2023 | 50,476 | 22.4% | 12 of 12 |
| 2024 | 51,316 | 22.7% | 12 of 12 |
| 2025 | 54,539 | 24.2% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free accountNo verified ISO price node is linked to this plant, or its price history could not load.
Emissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| CT1 | Natural Gas Fired Combustion Turbine | 5.2 | January 2008 |
| CT2 | Natural Gas Fired Combustion Turbine | 5.2 | December 2009 |
| CT3 | Natural Gas Fired Combustion Turbine | 7.5 | November 2014 |
| CT4 | Natural Gas Fired Combustion Turbine | 7.5 | November 2014 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists TDX North Slope Generating Inc. as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Power plants near TNSG North Plant
More plants operated by TDX North Slope Generating Inc.
Questions about TNSG North Plant
How much power does TNSG North Plant produce?
TNSG North Plant reported 54,539 MWh (54.5 GWh) of net generation in 2025, a 24.2% capacity factor on 25.4 MW of nameplate capacity.
Where is TNSG North Plant?
TNSG North Plant is in North Slope, Alaska, at 70.2353, −148.3836.
Who operates TNSG North Plant?
EIA-860M for August 2026 lists TDX North Slope Generating Inc. as the operator (EIA operator ID 57494). The operator is not always the owner.
When did TNSG North Plant start operating?
Its first generator began operating in January 2008, according to EIA-860M.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page