In Wrangell Petersburg County, Alaska (AK). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.

How big is Petersburg?

15 MW of nameplate capacity across 8 units, as of the EIA-860M release for 2026-07.

EIA-860M names Petersburg Borough - (AK) as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.

Is this the same as Petersburg LLC?

Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Petersburg Borough - (AK) here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "Petersburg LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.

Is Petersburg still running?

EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.

Petersburg

Petersburg is a 15 MW oil-fired power plant in Wrangell Petersburg County, Alaska, operated by Petersburg Borough - (AK). EIA-860M lists 8 generating units here. Its units entered service between 1965 and 2023.

As of 2026-07 (inventory dated 2026-07-31) · EIA-860M Preliminary Monthly Electric Generator Inventory · eia.gov/…/july_generator2026.xlsx · eia.gov/…/eia860m

Nameplate capacity: 14.7 MW; 12.6 MW net summer
Generating units: 8
In service: 1965–2023
EIA plant ID: 91

Where it is

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County: Wrangell Petersburg County, Alaska
Coordinates: 56.811, -132.9571
Balancing authority: Not reported
Sector: Electric Utility

Units, technology and status

Operator of record: Petersburg Borough - (AK)
Primary energy source: Petroleum
Technologies: Conventional Hydroelectric, Petroleum Liquids
Status: Operating

This site runs on more than one energy source. EIA-860M capacity splits: Petroleum 13 MW, Hydro 2 MW. It is filed here under Petroleum, the source with the most capacity.

Every plant Petersburg Borough - (AK) reports to EIA →

Petersburg: FAQ

Where is Petersburg?: In Wrangell Petersburg County, Alaska (AK). The map on this page is placed at the coordinates EIA files for the plant, which locate the site rather than any individual unit.
How big is Petersburg?: 15 MW of nameplate capacity across 8 units, as of the EIA-860M release for 2026-07.
Who owns Petersburg?: EIA-860M names Petersburg Borough - (AK) as the reporting entity. That is the operator of record on the survey, which is not always the ultimate owner.
Is this the same as Petersburg LLC?: Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Petersburg Borough - (AK) here — not the project company that holds the asset. Project companies are commonly registered as an LLC carrying the plant's name, so a search for "Petersburg LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is Petersburg still running?: EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.