PUTNAM
SubstationFlorida · FLORIDA POWER & LIGHT CO
At a glance
PUTNAM is an electric transmission substation in Florida, on FLORIDA POWER & LIGHT CO's transmission network. It is classified as high-voltage (230 kv) and connects 9 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 |
|---|---|---|---|---|
| #147823 | 230 kV | FLORIDA POWER & LIGHT CO | IN SERVICE | 33.8 mi |
| #132604 | 230 kV | FLORIDA POWER & LIGHT CO | IN SERVICE | 0.4 mi |
| #143754 | 230 kV | FLORIDA POWER & LIGHT CO | IN SERVICE | 9.9 mi |
| #101984 | 230 kV | FLORIDA POWER & LIGHT CO | IN SERVICE | 18.5 mi |
| #114048 | 230 kV | FLORIDA POWER & LIGHT CO | IN SERVICE | 15.6 mi |
| #117354 | 230 kV | FLORIDA POWER & LIGHT CO | IN SERVICE | 27.2 mi |
| #128502 | 230 kV | FLORIDA POWER & LIGHT CO | — | 0.2 mi |
| #109943 | 115 kV | FLORIDA POWER & LIGHT CO | IN SERVICE | 0.1 mi |
| #125341 | 115 kV | FLORIDA POWER & LIGHT CO | IN SERVICE | 0.3 mi |
| #136478 | 115 kV | FLORIDA POWER & LIGHT CO | IN SERVICE | 0.3 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of PUTNAM, 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 |
|---|---|---|---|---|---|---|---|
| UNKNOWN150864 | Substation-Adjacent | FL | Putnam County | 500 kV | 1,000 MW | 3.7 yrs | 66.7 |
| UNKNOWN108281 | Substation-Adjacent | FL | St. Johns County | 230 kV | 300 MW | 3.7 yrs | 63.7 |
| RICE | Substation-Adjacent | FL | Putnam County | 500 kV | 1,000 MW | 3.7 yrs | 63.7 |
| SPRINGBANK | Substation-Adjacent | FL | Clay County | 230 kV | 300 MW | 3.7 yrs | 63.5 |
| UNKNOWN120491 | Substation-Adjacent | FL | Clay County | 230 kV | 300 MW | 3.7 yrs | 63.4 |
| UNKNOWN120492 | Substation-Adjacent | FL | Clay County | 230 kV | 300 MW | 3.7 yrs | 63.1 |
| ST. JOHNS | Substation-Adjacent | FL | St. Johns County | 230 kV | 300 MW | 3.7 yrs | 63.0 |
| TOCOI | Substation-Adjacent | FL | St. Johns County | 230 kV | 300 MW | 3.7 yrs | 63.0 |
How does PUTNAM 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. 254 named substations in the state are in PUTNAM's 230–344 kV band (27% of named stations). 15 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 PUTNAM?
The 10 connected lines listed above are owned by FLORIDA POWER & LIGHT CO. Line voltages range from 115 kV to 230 kV. Their combined recorded length is about 106.2 miles.
How do candidate sites near PUTNAM score?
The 8 highest-scoring candidate sites within about 25 miles range from 63 to 67 on the 0–100 DC Readiness scale. They fall in Putnam County, St. Johns County, Clay County. 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 PUTNAM substation?
PUTNAM has a maximum voltage of 230 kV. That places it in the 230–344 kV band. The median named US substation in this dataset is 115 kV, so PUTNAM is above the national midpoint.
How many transmission lines connect to PUTNAM substation?
9 transmission lines terminate at or pass through PUTNAM in the HIFLD line data. The connected lines listed here run at 230 kV, 115 kV. Together the listed lines cover about 106.2 miles.
Who owns PUTNAM substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at PUTNAM belong to FLORIDA POWER & LIGHT CO. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is PUTNAM substation located?
PUTNAM is in Florida at 29.6299, -81.5858. The datacenter candidate sites closest to it are in Putnam County, St. Johns County, Clay County.
Are there datacenter candidate sites near PUTNAM substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of PUTNAM. The highest-scoring is UNKNOWN150864 at 67/100. Across Florida, the average DC Readiness score is 56.
Other 230 kV substations in Florida
- LAUDERDALE· 24 lines
- DAVIS· 18 lines
- SANFORD· 17 lines
- STANTON· 16 lines
- FORT MYERS SWITCHYARD· 15 lines
- RANCH· 15 lines
- BREVARD· 14 lines
- BROWARD· 13 lines
- All named substations in Florida· 943 stations
- Datacenter candidate sites in Florida· 4,344 sites
- Brownfield and retired plant sites in Florida
- Substations by state
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, “PUTNAM substation, Florida”, https://gridcensus.com/substations/florida/putnam-aa3f4d4b (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 PUTNAM 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.