24.6 MW Natural Gas operating in Spokane, WA — Avista Corporation
24.6 MW
Nameplate Capacity
6
Generators
units
Natural Gas Internal Combustion Engine
Technology
2002
Operating Since
Coordinates
47.6972, -117.1472
County
Spokane, WA
Nearby Plants
| Field | EIA | GEM | Wikidata |
|---|---|---|---|
| Operator | Avista Corp | Avista | — |
| Owner(s) | Avista Corp | Avista | — |
| Status | Operating | — | — |
Boulder Park is a 24.6 MW natural gas-fired power plant located in Spokane County, Washington. The plant began operating in 2002 and consists of six natural gas internal combustion engine generators. It is owned and operated by Avista Corp. Boulder Park is located within the Western Electricity Coordinating Council (WECC) NERC region, and its balancing authority is Avista Corporation.
In the most recent year of record, Boulder Park generated 99,023 MWh of electricity, resulting in a capacity factor of 45.9%. According to available data, the installed cost of the plant was $1,336.12 per kW. Boulder Park is ranked as the 16th largest power plant out of 17 in Washington state, and 1276th out of 1963 nationally. Financial data for the plant is sourced from FERC filings.
Generated from EIA, GEM, and public data sources
NERC Region
WECC
Balancing Authority
Avista Corporation
Grid Voltage
115 kV
Regulatory Status
RE
Entity Type
Investor-Owned Utility
Sector
Electric Utility
8.7K MWh
Latest Month
99.0K MWh
Annual Generation
45.9%
Capacity Factor
$1,412/kW
Installed Cost
$36.2/MWh
Operating Cost
Avista Corporation
Reporting Utility
Annual Capital & Operating Expenses
Cumulative Installed Cost
Per-Unit Cost Trends
This plant is outside organized wholesale electricity markets (ISOs/RTOs). Nodal pricing data is not available.
Last updated 2026-03-26
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