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

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

EIA-860M names Cascade Municipal Utilities - (IA) 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 Cascade LLC?

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

Is Cascade still running?

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

Cascade

Cascade is a 7 MW oil-fired power plant in Dubuque County, Iowa, operated by Cascade Municipal Utilities - (IA). EIA-860M lists 5 generating units here, inside MISO. Its units entered service between 1951 and 2020.

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: 7.2 MW; 6.8 MW net summer
Generating units: 5
In service: 1951–2020
EIA plant ID: 1129

Where it is

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County: Dubuque County, Iowa
Coordinates: 42.2982, -91.012
Balancing authority: MISO
Sector: Electric Utility

Units, technology and status

Operator of record: Cascade Municipal Utilities - (IA)
Primary energy source: Petroleum
Technologies: Petroleum Liquids
Status: Standby/Backup

Every plant Cascade Municipal Utilities - (IA) reports to EIA →

Cascade: FAQ

Where is Cascade?: In Dubuque County, Iowa (IA). 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 Cascade?: 7 MW of nameplate capacity across 5 units, as of the EIA-860M release for 2026-07.
Who owns Cascade?: EIA-860M names Cascade Municipal Utilities - (IA) 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 Cascade LLC?: Probably, but EIA-860M does not say. The survey records a plant name and a reporting entity — Cascade Municipal Utilities - (IA) 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 "Cascade LLC" usually means this site. This page shows only what EIA files, and does not assert a corporate structure it cannot see.
Is Cascade still running?: EIA-860M files it as "Standby/Backup" for 2026-07. Statuses change monthly, and this page follows the monthly release.