TNSG North Plant
North Slope County, Alaska · EIA plant ID 58278 · Operator: TDX North Slope Generating Inc.
Nameplate26MWSummer 23 MW
Generators5in service
Net generation55GWh12 mo to Dec 2025
Capacity factor27%gas/coal/oil units, summer MW
Heat rate12,573Btu/kWhfossil units, electric fuel, HHV
First online2008Runs as intermediate
Monthly net generation
EIA-923, all units at the plant. Net of station use; storage can go negative.
FinalPreliminary
Capacity factor by year
Net MWh ÷ (summer MW × hours), gas/coal/oil units. Each year uses that year's EIA-860 ratings; the hollow dot is the latest 12 months.
Heat rate by year
Electric fuel MMBtu × 1000 ÷ net MWh (Btu/kWh, HHV), fossil units only; CT + CA counted as one combined-cycle block.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2012 | 35.6 | 37.8% | 11,653 |
| 2013 | 60.5 | 64.5% | 13,471 |
| 2014 | 66.1 | 69.8% | 15,896 |
| 2015 | 79.9 | 49.9% | 16,326 |
| 2016 | 72.7 | 45.2% | 13,146 |
| 2017 | 65.3 | 40.7% | 12,441 |
| 2018 | 61 | 38.1% | 12,594 |
| 2019 | 56.4 | 27.9% | 13,284 |
| 2020 | 56 | 27.6% | 12,613 |
| 2021 | 49.7 | 24.6% | 13,008 |
| 2022 | 49.4 | 24.4% | 13,461 |
| 2023 | 50.5 | 24.9% | 13,558 |
| 2024 | 51.3 | 25.3% | 13,044 |
| 2025 | 54.5 | 27.0% | 12,573 |
Generators
EIA-860 (annual) with EIA-860M updates through Sep 2026. EIA-923 reports generation by plant, prime mover and fuel, not by unit, so unit-level output isn't shown.
| Gen ID | Technology | Prime mover | Nameplate MW | Summer MW | Online | Status | Planned retirement | OEM / model |
|---|---|---|---|---|---|---|---|---|
| 13 | Petroleum Liquids | IC | 0.3 | 0.3 | Oct 2010 | Operating (Standby / backup) | — | coming soon |
| CT1 | Natural Gas Fired Combustion Turbine | GT | 5.2 | 4.5 | Jan 2008 | Operating | — | coming soon |
| CT2 | Natural Gas Fired Combustion Turbine | GT | 5.2 | 4.5 | Dec 2009 | Operating | — | coming soon |
| CT3 | Natural Gas Fired Combustion Turbine | GT | 7.5 | 6.9 | Nov 2014 | Operating | — | coming soon |
| CT4 | Natural Gas Fired Combustion Turbine | GT | 7.5 | 6.9 | Nov 2014 | Operating | — | coming soon |
Owner / operator
Operator: TDX North Slope Generating Inc.. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| TDX North Slope Generating Inc. | 100.0% | 26 MW |
Nearby plants
Within 80 km.
| TNSG South Plant | 8 MW | 5 km |