Marathon Generating Plant
BrownfieldMarathon, Monroe, Florida · Florida Keys El Coop Assn, Inc
Marathon Generating Plant is a oil plant in Marathon, Monroe, Florida, retired 2018-11-01. Retired generation sites are among the most attractive datacenter redevelopment targets: the existing interconnection was sized for roughly 14 MW of generation, so the grid hookup, transmission rights, and often cooling-water access are already in place — collapsing the speed-to-power timeline versus a greenfield build.
Former use & capacity
Grid hookup & remediation
Nearby datacenter candidate sites
Scored candidate sites near Marathon Generating Plant, ranked by DC Readiness.
| Site | Type | State | County | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|---|---|
| MARATHON | Substation-Adjacent | FL | Monroe County | 138 kV | 100 MW | 3.6 yrs | 57.9 |
| UNKNOWN108501 | Substation-Adjacent | FL | Monroe County | 138 kV | 100 MW | 3.6 yrs | 57.3 |
| MARATHON GENERATING PLANT | Substation-Adjacent | FL | Monroe County | 138 kV | 100 MW | 3.6 yrs | 56.2 |
| UNKNOWN150796 | Substation-Adjacent | FL | Monroe County | 138 kV | 100 MW | 3.6 yrs | 55.7 |
| Marathon Generating Plant | Brownfield | FL | Monroe | — | 14 MW | — | 54.9 |
| UNKNOWN120079 | Substation-Adjacent | FL | Monroe County | 138 kV | 100 MW | 3.6 yrs | 54.8 |
| Greenfield (TAP141792 - ISLAMORADA) | Greenfield | FL | Monroe County | 138 kV | 100 MW | 3.6 yrs | 53.4 |
| Greenfield (TAP141792 - ISLAMORADA) | Greenfield | FL | Monroe County | 138 kV | 100 MW | 3.6 yrs | 52.5 |
See all datacenter sites in Florida →
Dataset updated . Screening estimates derived from public data sources.
Brownfield attributes are derived from EIA retired-generator and EPA public data. Existing capacity reflects the retired plant's historical nameplate, not deliverable interconnection for a new load. Confirm reusable interconnection rights, remediation status, and site availability with the utility, ISO, and current owner.
Go deeper than the public screen
This page shows a public slice of the GridCensus dataset for Marathon Generating Plant, Marathon, Monroe, Florida. Pro and Enterprise plans unlock the full 164,098-site catalog, raw sub-scores, parcel ownership, interconnection-queue detail, saved searches, and programmatic API access.