Tyee Lake Hydroelectric Facility
Wrangell County, Alaska · EIA plant ID 61166 · Operator: Southeast Alaska Power Agency
Nameplate23MWSummer 23 MW
Generators2in service
Net generation103GWh12 mo to Dec 2025
Capacity factor52%hydro units, summer MW
Heat rate—thermal plants only
First online1983
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), hydro 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.
Heat rate applies to fuel-burning (thermal) units only.
Annual data table
| Year | Net GWh | Capacity factor | Heat rate (Btu/kWh) |
|---|---|---|---|
| 2016 | 96.9 | 48.8% | — |
| 2017 | 111.6 | 56.4% | — |
| 2018 | 117.2 | 59.2% | — |
| 2019 | 76 | 38.4% | — |
| 2020 | 89.7 | 45.2% | — |
| 2021 | 88.1 | 44.5% | — |
| 2022 | 107.5 | 54.3% | — |
| 2023 | 119.1 | 60.2% | — |
| 2024 | 126 | 63.5% | — |
| 2025 | 103.4 | 52.2% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| UNIT1 | Conventional Hydroelectric | HY | 11.3 | 11.3 | Jul 1983 | Operating | — | coming soon |
| UNIT2 | Conventional Hydroelectric | HY | 11.3 | 11.3 | Jul 1983 | Operating | — | coming soon |