Silver Sage Windpower
Laramie County, Wyoming · EIA plant ID 57091 · Operator: Duke Energy Renewables Services
Nameplate42MWSummer 42 MW
Generators1in service
Net generation104GWh12 mo to Aug 2026
Capacity factor28%wind units, summer MW
Heat rate—thermal plants only
First online2009
The 12-month figures include preliminary EIA-923 months, which EIA revises. Final data runs through Dec 2025.
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), wind 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) |
|---|---|---|---|
| 2009 | 33.3 | 35.9% | — |
| 2010 | 126.8 | 34.5% | — |
| 2011 | 139.6 | 38.0% | — |
| 2012 | 128.9 | 34.9% | — |
| 2013 | 131.5 | 35.8% | — |
| 2014 | 132.2 | 35.9% | — |
| 2015 | 111.6 | 30.3% | — |
| 2016 | 129.8 | 35.2% | — |
| 2017 | 123.8 | 33.6% | — |
| 2018 | 123.7 | 33.6% | — |
| 2019 | 120 | 32.6% | — |
| 2020 | 125.8 | 34.1% | — |
| 2021 | 102.9 | 28.0% | — |
| 2022 | 123.6 | 33.6% | — |
| 2023 | 109.5 | 29.8% | — |
| 2024 | 108.8 | 29.5% | — |
| 2025 | 100.2 | 27.3% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| SSW01 | Onshore Wind Turbine | WT | 42 | 42 | Oct 2009 | Operating | — | suzlon S88-2100 |
Owner / operator
Operator: Duke Energy Renewables Services. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Duke Energy Renewables Services | 100.0% | 42 MW |
Nearby plants
Within 80 km.
| Happy Jack Windpower Project | 29 MW | 2.5 km |
| Corriedale Wind Energy | 53 MW | 3.8 km |
| Roundhouse Wind Energy Project | 226 MW | 8 km |
| Roundhouse Renewable Energy II | 106 MW | 8.7 km |
| South Cheyenne Solar | 150 MW | 23.7 km |
| Cheyenne Prairie Generating Station | 140 MW | 25.5 km |