Where is South Main Street?

In Ogle County, Illinois (IL). 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 South Main Street?

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

Who owns South Main Street?

EIA-860M names Rochelle Municipal Utilities - (IL) 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 South Main Street LLC?

Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Rochelle Municipal Utilities - (IL) 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 "South Main Street LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.

Is South Main Street still running?

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

South Main Street

South Main Street is a 16 MW oil-fired power plant in Ogle County, Illinois, operated by Rochelle Municipal Utilities - (IL). EIA-860M lists 8 generating units here, inside PJM. Its units entered service between 1967 and 2016.

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: 15.8 MW; 14.4 MW net summer
Generating units: 8
In service: 1967–2016
EIA plant ID: 961

Where it is

Loading map…

County: Ogle County, Illinois
Coordinates: 41.9092, -89.0504
Balancing authority: PJM
Sector: Electric Utility

Units, technology and status

Operator of record: Rochelle Municipal Utilities - (IL)
Primary energy source: Petroleum
Technologies: Natural Gas Internal Combustion Engine, Petroleum Liquids
Status: Standby/Backup (5) · Operating (3)

This site runs on more than one energy source. EIA-860M capacity splits: Petroleum 11 MW, Natural gas 5 MW. It is filed here under Petroleum, the source with the most capacity.

Every plant Rochelle Municipal Utilities - (IL) reports to EIA →

South Main Street: FAQ

Where is South Main Street?: In Ogle County, Illinois (IL). 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 South Main Street?: 16 MW of nameplate capacity across 8 units, as of the EIA-860M release for 2026-07.
Who owns South Main Street?: EIA-860M names Rochelle Municipal Utilities - (IL) 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 South Main Street LLC?: Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Rochelle Municipal Utilities - (IL) 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 "South Main Street LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is South Main Street still running?: EIA-860M files it as "Standby/Backup" for 2026-07. Statuses change monthly, and this page follows the monthly release.