In Pima County, Arizona (AZ). 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 North Loop?

108 MW of nameplate capacity across 4 units, as of the EIA-860M release for 2026-07.

EIA-860M names Tucson Electric Power Co 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 North Loop LLC?

Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Tucson Electric Power Co 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 "North Loop LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.

Is North Loop still running?

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

North Loop

North Loop is a 108 MW natural gas power plant in Pima County, Arizona, operated by Tucson Electric Power Co. EIA-860M lists 4 generating units here. Its units entered service between 1972 and 2001.

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: 107.8 MW; 95 MW net summer
Generating units: 4
In service: 1972–2001
EIA plant ID: 6088

Where it is

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County: Pima County, Arizona
Coordinates: 32.401, -111.1262
Balancing authority: TEPC
Sector: Electric Utility

Units, technology and status

Operator of record: Tucson Electric Power Co
Primary energy source: Natural gas
Technologies: Natural Gas Fired Combustion Turbine
Status: Operating

Every plant Tucson Electric Power Co reports to EIA →

North Loop: FAQ

Where is North Loop?: In Pima County, Arizona (AZ). 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 North Loop?: 108 MW of nameplate capacity across 4 units, as of the EIA-860M release for 2026-07.
Who owns North Loop?: EIA-860M names Tucson Electric Power Co 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 North Loop LLC?: Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Tucson Electric Power Co 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 "North Loop LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is North Loop still running?: EIA-860M files it as "Operating" for 2026-07. Statuses change monthly, and this page follows the monthly release.