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United States › Power plants › Oil-fired power plants › Florida

OIL-FIRED POWER PLANTS

Marathon Generating Plant

Marathon Generating Plant is a 25.0 MW retired oil-fired power plant in Monroe County, Florida, operated by Florida Keys El Coop Assn, Inc.

Plant statusClosed
  1. Planning (completed)
  2. Consented (completed)
  3. Construction (completed)
  4. OperatingJan 1958 (completed)
  5. ClosedMay 2025 (current stage)

Open in Google MapsMore oil-fired power plants in Florida

Generators

Each generating unit EIA lists at this plant.

UnitTechnologyCapacityStatusOnlineRetired / planned retirement
10Petroleum Liquids3.5 MW RetiredJan 1998May 2025
11Petroleum Liquids3.5 MW RetiredJan 2001May 2025
3Petroleum Liquids3.0 MW RetiredJan 1958Nov 2018
4Petroleum Liquids3.0 MW RetiredJan 1959Nov 2018
5Petroleum Liquids3.0 MW RetiredJan 1959Jan 2007
6Petroleum Liquids2.5 MW RetiredMay 1973Nov 2018
7Petroleum Liquids2.5 MW RetiredJan 1973Nov 2018
8Petroleum Liquids2.0 MW RetiredMay 1989May 2025
9Petroleum Liquids2.0 MW RetiredMay 1989May 2025

Plant details

Operator
Florida Keys El Coop Assn, Inc
Location
Monroe County, Florida
Balancing authority
FPL
Sector
Electric Utility
Capacity
Retired: 25.0 MW
First unit online
Jan 1958
EIA plant ID
696

Location

24.7108, -81.0927

Nearby power plants

Source: U.S. Energy Information Administration, Form EIA-860M, September 2026. Planned dates are targets reported by the developer and often change. Report a problem