Adams Nielson Solar
Adams County, Washington · EIA plant ID 61933 · Operator: strata manager, llc
Nameplate19MWSummer 19 MW
Generators1in service
Net generation38GWh12 mo to Aug 2026
Capacity factor23%solar units, summer MW
Heat rate—thermal plants only
First online2018
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), solar 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) |
|---|---|---|---|
| 2018 | 1.2 | 4.3% | — |
| 2019 | 43.3 | 25.8% | — |
| 2020 | 45.4 | 26.9% | — |
| 2021 | 43.4 | 25.8% | — |
| 2022 | 34.9 | 20.8% | — |
| 2023 | 37.1 | 22.0% | — |
| 2024 | 40.8 | 24.2% | — |
| 2025 | 44.6 | 26.5% | — |
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 |
|---|---|---|---|---|---|---|---|---|
| ADAMS | Solar Photovoltaic | PV | 19.2 | 19.2 | Nov 2018 | Operating | — | coming soon |
Owner / operator
Operator: strata manager, llc. Ownership shares by in-service nameplate MW (EIA-860 Schedule 4; units not listed there are wholly owned by the operator).
| Adams Nielson Solar, LLC | 100.0% | 19 MW |
Nearby plants
Within 80 km.
| Rattlesnake Flat | 144 MW | 4.4 km |
| Lower Monumental | 810 MW | 44 km |
| Russell D Smith | 6 MW | 44.4 km |
| Quincy Chute | retired | 48.4 km |
| Saddle Mountain East Wind Farm | — | 58.1 km |
| Little Goose | 810 MW | 61.3 km |