Where is TNSG South Plant?

In North Slope 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 TNSG South Plant?

8 MW of nameplate capacity across 5 units, as of the EIA-860M release for 2026-07.

Who owns TNSG South Plant?

EIA-860M names TDX North Slope Generating Inc. 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 TNSG South Plant LLC?

Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — TDX North Slope Generating Inc. 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 "TNSG South Plant LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.

Is TNSG South Plant still running?

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

TNSG South Plant

TNSG South Plant is a 8 MW natural gas power plant in North Slope County, Alaska, operated by TDX North Slope Generating Inc.. EIA-860M lists 5 generating units here. Its units entered service between 1992 and 2006.

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: 7.8 MW; 7.2 MW net summer
Generating units: 5
In service: 1992–2006
EIA plant ID: 58117

Where it is

Loading map…

County: North Slope County, Alaska
Coordinates: 70.2, -148.4667
Balancing authority: Not reported
Sector: Electric Utility

Units, technology and status

Operator of record: TDX North Slope Generating Inc.
Primary energy source: Natural gas
Technologies: Natural Gas Internal Combustion Engine
Status: Operating

Every plant TDX North Slope Generating Inc. reports to EIA →

TNSG South Plant: FAQ

Where is TNSG South Plant?: In North Slope 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 TNSG South Plant?: 8 MW of nameplate capacity across 5 units, as of the EIA-860M release for 2026-07.
Who owns TNSG South Plant?: EIA-860M names TDX North Slope Generating Inc. 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 TNSG South Plant LLC?: Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — TDX North Slope Generating Inc. 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 "TNSG South Plant LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is TNSG South Plant still running?: EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.