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144 MW Wind operating in Adams, WA — Avista Corporation
144 MW
Nameplate Capacity
1
Generators
unit
Onshore Wind Turbine
Technology
2020
Operating Since
Owner data does not fully agree across sources.
EIA typically reports the operating utility, while GEM resolves to the financial owner or parent corporation. Both can be correct.
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Rattlesnake Flat, LLC | Clearway Energy Group LLC | — |
| Owner(s) | Rattlesnake Flat, LLC | Clearway Energy | — |
| Status | Operating | operating | — |
Rattlesnake Flat is a 144 MW wind power plant located in Adams County, Washington. The facility began operating in 2020 and is owned by Clearway Energy and operated by Rattlesnake Flat, LLC. It utilizes a single generator comprised of onshore wind turbine technology. The plant uses Siemens Gamesa Renewable Energy SG-2.3-108 turbines, with a rotor diameter of 108 meters and a hub height of 80 meters. Rattlesnake Flat ranks as the 11th largest wind farm in Washington state out of 17, and 548th nationally out of 734.
The plant's latest annual generation was 414,699 MWh, resulting in a capacity factor of 32.8%. Rattlesnake Flat operates within the Avista Corporation balancing authority and the Western Electricity Coordinating Council (WECC) NERC region. Financial data indicates a power purchase agreement (PPA) price of $30.1 per MWh.
Generated from EIA, GEM, and public data sources
Grid Region
Pacific Northwest
Market
WEIM Participant
NERC Region
WECC — Western Electricity Coordinating Council
Balancing Authority
48.0K MWh
Latest Month
414.7K MWh
Annual Generation
32.8%
Capacity Factor
Rattlesnake Flat, LLC · Data from 2020–2025
$30.1/MWh
PPA Price
This plant's balancing authority participates in CAISO's Western Energy Imbalance Market (WEIM). Direct nodal pricing data is not yet available.
Last updated 2026-03-26
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ask pi about Rattlesnake FlatAvista Corporation (AVA)
Grid Voltage
115.0 kV
Regulatory Status
NR — Non-Regulated
Entity Type
Independent Power Producer
Sector
IPP Non-CHP