ISLAMORADA
SubstationFlorida · FLORIDA POWER & LIGHT CO
At a glance
ISLAMORADA is an electric transmission substation in Florida, on FLORIDA POWER & LIGHT CO's transmission network. It is classified as sub-transmission (138 kv) and connects 2 transmission lines. Substation proximity is one of the strongest speed-to-power signals for siting a datacenter — interconnection distance to an energized, high-voltage bus is often the binding constraint on time-to-energization.
Voltage & classification
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #147916 | 138 kV | FLORIDA POWER & LIGHT CO | IN SERVICE | 11.1 mi |
| #161191 | 138 kV | FLORIDA POWER & LIGHT CO | IN SERVICE | 24.1 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of ISLAMORADA, ranked by DC Readiness. Sites this close to an energized substation carry a strong speed-to-power advantage.
| Site | Type | State | County | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|---|---|
| JEWFISH CREEK | Substation-Adjacent | FL | Miami-Dade County | 138 kV | 100 MW | 3.7 yrs | 56.5 |
| ISLAMORADA | Substation-Adjacent | FL | Miami-Dade County | 138 kV | 100 MW | 3.7 yrs | 54.8 |
| KEY LARGO | Substation-Adjacent | FL | Miami-Dade County | 138 kV | 100 MW | 3.7 yrs | 54.8 |
| TAVERNIER | Substation-Adjacent | FL | Miami-Dade County | 138 kV | 100 MW | 3.7 yrs | 54.8 |
| UNKNOWN108501 | Substation-Adjacent | FL | Monroe County | 138 kV | 100 MW | 3.7 yrs | 53.1 |
| EC Near Marathon Generating Plant | Greenfield | FL | Monroe | — | — | 3.7 yrs | 49.9 |
| EC Near Marathon Generating Plant | Greenfield | FL | Monroe | — | — | 3.7 yrs | 48.1 |
| EC Near Marathon Generating Plant | Greenfield | FL | Monroe | — | — | 3.7 yrs | 47.3 |
How does ISLAMORADA compare with other substations in Florida?
Florida has 2,533 substation records in HIFLD, of which 943 carry a station name; the rest are unnamed tap points, risers and line ends. 359 named substations in the state are in ISLAMORADA's 115–229 kV band (38% of named stations). 269 sit in a higher band. 15 named substations in Florida operate at 345 kV or above. The highest voltage recorded in the state is 500 kV, and the state median is 138 kV.
Who owns the transmission lines at ISLAMORADA?
The 2 connected lines listed above are owned by FLORIDA POWER & LIGHT CO. Line voltages range from 138 kV to 138 kV. Their combined recorded length is about 35.2 miles.
How do candidate sites near ISLAMORADA score?
The 8 highest-scoring candidate sites within about 25 miles range from 47 to 57 on the 0–100 DC Readiness scale. They fall in Miami-Dade County, Monroe County, Monroe. The Florida average across 4,344 scored sites is 56. 1,539 of those Florida sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
What voltage is ISLAMORADA substation?
ISLAMORADA has a maximum voltage of 138 kV. That places it in the 115–229 kV band. The median named US substation in this dataset is 115 kV, so ISLAMORADA is above the national midpoint.
How many transmission lines connect to ISLAMORADA substation?
2 transmission lines terminate at or pass through ISLAMORADA in the HIFLD line data. The connected lines listed here run at 138 kV. Together the listed lines cover about 35.2 miles.
Who owns ISLAMORADA substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at ISLAMORADA belong to FLORIDA POWER & LIGHT CO. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is ISLAMORADA substation located?
ISLAMORADA is in Florida at 24.9056, -80.6482. The datacenter candidate sites closest to it are in Miami-Dade County, Monroe County, Monroe.
Are there datacenter candidate sites near ISLAMORADA substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of ISLAMORADA. The highest-scoring is JEWFISH CREEK at 57/100. Across Florida, the average DC Readiness score is 56.
Other 138 kV substations in Florida
About this data
Source: HIFLD Electric Substations and Transmission Lines (U.S. Department of Homeland Security), as published June 29, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: GridCensus, “ISLAMORADA substation, Florida”, https://gridcensus.com/substations/florida/islamorada-151ea7a5 (data as of June 29, 2026).
Dataset updated . Screening estimates derived from public data sources.
Substation attributes are derived from public HIFLD / EIA infrastructure data and may lag real-world upgrades or retirements. Voltage and connected-line counts are screening figures — confirm available capacity and interconnection terms directly with the operating utility and ISO.
Go deeper than the public screen
Every site and score for ISLAMORADA substation, Florida is free to browse. Pro adds Watchtower on 25 sites, alerts when new candidate sites, datacenters or interconnection-queue requests appear in your markets, score and capacity history, and CSV export. Enterprise adds team seats, weekly data files for all 147,272 sites, the REST API and an MCP server for AI tools.