TAP146641
SubstationSouth Carolina · PROGRESS ENERGY CAROLINAS INC
At a glance
TAP146641 is an electric transmission substation in South Carolina, on PROGRESS ENERGY CAROLINAS INC's transmission network. It is classified as sub-transmission (115 kv) and connects 3 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
Ownership
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #101968 | 115 kV | PROGRESS ENERGY CAROLINAS INC | IN SERVICE | 0.1 mi |
| #104032 | 115 kV | PROGRESS ENERGY CAROLINAS INC | IN SERVICE | 21.3 mi |
| #120727 | 115 kV | PROGRESS ENERGY CAROLINAS INC | IN SERVICE | 0.2 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP146641, 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 |
|---|---|---|---|---|---|---|---|
| SOCIETY HILL | Substation-Adjacent | SC | Marlboro County | 230 kV | 300 MW | 3.9 yrs | 63.1 |
| TAP147736 | Substation-Adjacent | SC | Marlboro County | 230 kV | 300 MW | 3.9 yrs | 62.2 |
| UNKNOWN121497 | Substation-Adjacent | SC | Florence County | 230 kV | 300 MW | 3.9 yrs | 61.4 |
| UNKNOWN121224 | Substation-Adjacent | SC | Florence County | 230 kV | 300 MW | 3.9 yrs | 61.4 |
| TAP155690 | Substation-Adjacent | SC | Marion County | 230 kV | 300 MW | 3.9 yrs | 61.2 |
| UNKNOWN121220 | Substation-Adjacent | SC | Florence County | 230 kV | 300 MW | 3.9 yrs | 61.2 |
| UNKNOWN121206 | Substation-Adjacent | SC | Marion County | 230 kV | 300 MW | 3.9 yrs | 60.9 |
| TAP146637 | Substation-Adjacent | SC | Dillon County | 230 kV | 300 MW | 3.9 yrs | 60.9 |
Who owns the transmission lines at TAP146641?
The 3 connected lines listed above are owned by PROGRESS ENERGY CAROLINAS INC. Line voltages range from 115 kV to 115 kV. Their combined recorded length is about 21.5 miles.
How do candidate sites near TAP146641 score?
The 8 highest-scoring candidate sites within about 25 miles range from 61 to 63 on the 0–100 DC Readiness scale. They fall in Marlboro County, Florence County, Marion County, Dillon County. The South Carolina average across 2,061 scored sites is 57.1. 1,124 of those South Carolina sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
What voltage is TAP146641 substation?
TAP146641 has a maximum voltage of 115 kV. That places it in the 115–229 kV band. The median named US substation in this dataset is 115 kV, so TAP146641 is at the national midpoint.
How many transmission lines connect to TAP146641 substation?
3 transmission lines terminate at or pass through TAP146641 in the HIFLD line data. The connected lines listed here run at 115 kV. Together the listed lines cover about 21.5 miles.
Who owns TAP146641 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TAP146641 belong to PROGRESS ENERGY CAROLINAS INC. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TAP146641 substation located?
TAP146641 is in South Carolina at 34.1498, -79.7360. The datacenter candidate sites closest to it are in Marlboro County, Florence County, Marion County.
Are there datacenter candidate sites near TAP146641 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP146641. The highest-scoring is SOCIETY HILL at 63/100. Across South Carolina, the average DC Readiness score is 57.1.
More in South Carolina
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, “TAP146641 substation, South Carolina”, https://gridcensus.com/substations/south-carolina/tap146641-81029927 (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 TAP146641 substation, South Carolina 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.