NSB Wainwright Utility
North Slope County, Alaska · EIA plant ID 7488 · Operator: North Slope Borough Power & Light
Nameplate3MWSummer 3 MW
Generators5in service
Net generation7GWh12 mo to Dec 2025
Capacity factor26%gas/coal/oil units, summer MW
Heat rate11,027Btu/kWhfossil units, electric fuel, HHV
First online1988Runs 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) |
|---|---|---|---|
| 2002 | 6 | 22.8% | 10,767 |
| 2003 | 5.4 | 20.6% | 10,127 |
| 2004 | 4.8 | 18.3% | 10,663 |
| 2005 | 4.7 | 17.7% | 11,217 |
| 2006 | 4.9 | 18.6% | 9,056 |
| 2007 | 5 | 19.0% | 9,066 |
| 2008 | 5.7 | 21.6% | 11,909 |
| 2009 | 5.8 | 22.1% | 11,958 |
| 2010 | 5.3 | 20.2% | 12,722 |
| 2011 | 6.3 | 23.8% | 10,907 |
| 2012 | 6.4 | 24.1% | 10,482 |
| 2013 | 6.3 | 24.1% | 10,483 |
| 2014 | 6.4 | 24.2% | 10,789 |
| 2015 | 6.8 | 25.9% | 11,062 |
| 2016 | 6.8 | 25.8% | 11,171 |
| 2017 | 6.9 | 26.2% | 10,985 |
| 2018 | 6.9 | 26.4% | 11,008 |
| 2019 | 7 | 26.5% | 11,246 |
| 2020 | 7.1 | 26.9% | 11,309 |
| 2021 | 6.9 | 26.3% | 11,222 |
| 2022 | 7 | 26.5% | 10,872 |
| 2023 | 6.8 | 26.0% | 11,220 |
| 2024 | 7 | 26.7% | 11,138 |
| 2025 | 6.8 | 25.9% | 11,027 |
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 |
|---|---|---|---|---|---|---|---|---|
| PG1 | Petroleum Liquids | IC | 0.4 | 0.4 | Aug 1988 | Operating | — | coming soon |
| PG2 | Petroleum Liquids | IC | 0.4 | 0.4 | Aug 1988 | Operating | — | coming soon |
| PG3 | Petroleum Liquids | IC | 0.4 | 0.4 | Aug 1989 | Operating | — | coming soon |
| PG4A | Petroleum Liquids | IC | 0.9 | 0.9 | Oct 2001 | Operating | — | coming soon |
| PG5 | Petroleum Liquids | IC | 0.9 | 0.9 | Oct 2001 | Operating | — | coming soon |
| PG4 | Petroleum Liquids | IC | 0.3 | 0.3 | — | Retired Jan 2003 | — | coming soon |
Owner / operator
Operator: North Slope Borough Power & Light. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| North Slope Borough Power & Light | 100.0% | 3 MW |
Nearby plants
Within 80 km.
No other plants within 80 km.