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Stock Island

Other power plant · Monroe County, Florida

Nameplate capacity
127 MW
Rank in Florida
#65
of 346 plants
In service since
1978
November 1978

Details

Primary fuel
Other
Technology
Petroleum Liquids
Operator
Utility Board of Key West City
County
Monroe County
Generating units
7
Share of state capacity
0.16%
Rank among other plants in Florida
#6 of 41
EIA plant code
6584

Generating units

Individual generating units at Stock Island
UnitTechnologyNameplateSummerOnlineStatus
GT4Petroleum Liquids42 MW44 MW2006Operating
GT1Petroleum Liquids23 MW19 MW1978Operating
GT2Petroleum Liquids20 MW17 MW1999Operating
GT3Petroleum Liquids20 MW17 MW1999Operating
MSD1Petroleum Liquids9.6 MW7.5 MW1991Operating
MSD2Petroleum Liquids9.6 MW7.5 MW1991Operating
EP2Petroleum Liquids2.5 MW2.5 MW2012Operating

Nameplate is the maximum rated output; summer capacity is what the unit can reliably deliver on a hot day, which is typically lower.

Similarly sized plants in Florida

About this data

From EIA’s inventory of operable generators, May 2026 release. Capacity is nameplate — the maximum rated output of the equipment, not what the plant actually generates over a year, which depends on how often it runs. A 127 MW solar plant and a 127 MW nuclear plant have the same entry here and produce very different amounts of electricity.

“In service since” is the earliest in-service date among the units still listed, so a site rebuilt around newer equipment can read as younger than the site itself. All Florida power plants · What Florida actually generates