Public Resources Code section 25120

“Thermal powerplant” means any stationary or floating electrical generating facility using any source of thermal energy, with a generating capacity of 50 megawatts or more, and any facilities appurtenant thereto. Exploratory, development, and production wells, resource transmission lines, and other related facilities used in connection with a geothermal exploratory project or a geothermal field development project are not appurtenant facilities for the purposes of this division.
“Thermal powerplant” does not include any wind, hydroelectric, or solar photovoltaic electrical generating facility.

Source: Section 25120, https://leginfo.­legislature.­ca.­gov/faces/codes_displaySection.­xhtml?lawCode=PRC§ionNum=25120.­ (updated Sep. 19, 1988; accessed Jun. 25, 2025).

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Verified:
Jun. 25, 2025

§ 25120's source at ca​.gov