CARROLLTON
SubstationKentucky · KENTUCKY UTILITIES CO
At a glance
CARROLLTON is an electric transmission substation in Kentucky, on KENTUCKY UTILITIES CO's transmission network. It is classified as sub-transmission (138 kv) and connects 7 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 |
|---|---|---|---|---|
| #157820 | 138 kV | KENTUCKY UTILITIES CO | IN SERVICE | 4.4 mi |
| #156367 | 138 kV | — | IN SERVICE | 17.1 mi |
| #116047 | 138 kV | KENTUCKY UTILITIES CO | IN SERVICE | 38.6 mi |
| #157829 | 138 kV | — | IN SERVICE | 17.1 mi |
| #130983 | 69 kV | — | IN SERVICE | 8.6 mi |
| #167435 | 69 kV | KENTUCKY UTILITIES CO | IN SERVICE | 7.1 mi |
| #163558 | 69 kV | KENTUCKY UTILITIES CO | IN SERVICE | 5.0 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of CARROLLTON, 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 |
|---|---|---|---|---|---|---|---|
| UNKNOWN125223 | Substation-Adjacent | KY | Oldham County | 345 kV | 600 MW | 3.9 yrs | 69.7 |
| GHENT STATION | Substation-Adjacent | KY | Switzerland County | 345 kV | 600 MW | 3.9 yrs | 67.0 |
| UNKNOWN130552 | Substation-Adjacent | KY | Ohio County | 345 kV | 600 MW | 4.7 yrs | 66.2 |
| JEFFERSON | Substation-Adjacent | IN | Jefferson County | 765 kV | 1,000 MW | 3.0 yrs | 65.6 |
| UNKNOWN130644 | Substation-Adjacent | KY | Oldham County | 138 kV | 100 MW | 3.9 yrs | 65.4 |
| GALLATIN | Substation-Adjacent | KY | Switzerland County | 345 kV | 600 MW | 4.7 yrs | 65.1 |
| UNKNOWN125278 | Substation-Adjacent | KY | Carroll County | 345 kV | 600 MW | 3.9 yrs | 64.4 |
| UNKNOWN125224 | Substation-Adjacent | KY | Oldham County | 138 kV | 100 MW | 3.9 yrs | 63.8 |
How does CARROLLTON compare with other substations in Kentucky?
Kentucky has 2,070 substation records in HIFLD, of which 190 carry a station name; the rest are unnamed tap points, risers and line ends. 102 named substations in the state are in CARROLLTON's 115–229 kV band (54% of named stations). 19 sit in a higher band. 19 named substations in Kentucky operate at 345 kV or above. The highest voltage recorded in the state is 765 kV, and the state median is 138 kV.
Who owns the transmission lines at CARROLLTON?
The 7 connected lines listed above are owned by KENTUCKY UTILITIES CO. Line voltages range from 69 kV to 138 kV. Their combined recorded length is about 97.9 miles.
How do candidate sites near CARROLLTON score?
The 8 highest-scoring candidate sites within about 25 miles range from 64 to 70 on the 0–100 DC Readiness scale. They fall in Oldham County, Switzerland County, Ohio County, Jefferson County. The Kentucky average across 7,741 scored sites is 52.8. 1,261 of those Kentucky sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
What voltage is CARROLLTON substation?
CARROLLTON has a maximum voltage of 138 kV and a minimum of 69 kV. That places it in the 115–229 kV band. The median named US substation in this dataset is 115 kV, so CARROLLTON is above the national midpoint.
How many transmission lines connect to CARROLLTON substation?
7 transmission lines terminate at or pass through CARROLLTON in the HIFLD line data. The connected lines listed here run at 138 kV, 69 kV. Together the listed lines cover about 97.9 miles.
Who owns CARROLLTON substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at CARROLLTON belong to KENTUCKY UTILITIES CO. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is CARROLLTON substation located?
CARROLLTON is in Kentucky at 38.6681, -85.1729. The datacenter candidate sites closest to it are in Oldham County, Switzerland County, Ohio County.
Are there datacenter candidate sites near CARROLLTON substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of CARROLLTON. The highest-scoring is UNKNOWN125223 at 70/100. Across Kentucky, the average DC Readiness score is 52.8.
Other 138 kV substations in Kentucky
- MIDDLETOWN· 11 lines
- PADDY'S RUN· 11 lines
- BEAVER CREEK· 10 lines
- BELLEFONTE· 9 lines
- HAEFLING· 9 lines
- ASHBOTTOM· 8 lines
- BIG SANDY· 8 lines
- FAWKES SWITCHING STATION· 8 lines
- All named substations in Kentucky· 190 stations
- Datacenter candidate sites in Kentucky· 7,741 sites
- Brownfield and retired plant sites in Kentucky
- 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, “CARROLLTON substation, Kentucky”, https://gridcensus.com/substations/kentucky/carrollton-5f2c37e6 (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 CARROLLTON substation, Kentucky 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.