TAP146890
SubstationSouth Carolina · PROGRESS ENERGY CAROLINAS INC
At a glance
TAP146890 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 |
|---|---|---|---|---|
| #127745 | 115 kV | PROGRESS ENERGY CAROLINAS INC | IN SERVICE | 0.0 mi |
| #128414 | 115 kV | PROGRESS ENERGY CAROLINAS INC | IN SERVICE | 4.8 mi |
| #139440 | 115 kV | PROGRESS ENERGY CAROLINAS INC | IN SERVICE | 11.2 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP146890, 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 |
|---|---|---|---|---|---|---|---|
| JEFFERIES STATION | Substation-Adjacent | SC | Berkeley County | 230 kV | 300 MW | 3.9 yrs | 67.7 |
| UNKNOWN117353 | Substation-Adjacent | SC | Berkeley County | 230 kV | 300 MW | 3.9 yrs | 63.5 |
| UNKNOWN121331 | Substation-Adjacent | SC | Williamsburg County | 230 kV | 300 MW | 3.9 yrs | 63.4 |
| UNKNOWN121218 | Substation-Adjacent | SC | Williamsburg County | 230 kV | 300 MW | 3.9 yrs | 62.5 |
| TAP146839 | Substation-Adjacent | SC | Williamsburg County | 230 kV | 300 MW | 3.9 yrs | 62.5 |
| KINGSTREE | Substation-Adjacent | SC | Williamsburg County | 230 kV | 300 MW | 3.9 yrs | 62.4 |
| UNKNOWN121497 | Substation-Adjacent | SC | Florence County | 230 kV | 300 MW | 3.9 yrs | 61.4 |
| UNKNOWN121220 | Substation-Adjacent | SC | Florence County | 230 kV | 300 MW | 3.9 yrs | 61.2 |
Who owns the transmission lines at TAP146890?
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 16 miles.
How do candidate sites near TAP146890 score?
The 8 highest-scoring candidate sites within about 25 miles range from 61 to 68 on the 0–100 DC Readiness scale. They fall in Berkeley County, Williamsburg County, Florence 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 TAP146890 substation?
TAP146890 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 TAP146890 is at the national midpoint.
How many transmission lines connect to TAP146890 substation?
3 transmission lines terminate at or pass through TAP146890 in the HIFLD line data. The connected lines listed here run at 115 kV. Together the listed lines cover about 16 miles.
Who owns TAP146890 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TAP146890 belong to PROGRESS ENERGY CAROLINAS INC. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TAP146890 substation located?
TAP146890 is in South Carolina at 33.6111, -79.7854. The datacenter candidate sites closest to it are in Berkeley County, Williamsburg County, Florence County.
Are there datacenter candidate sites near TAP146890 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP146890. The highest-scoring is JEFFERIES STATION at 68/100. 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, “TAP146890 substation, South Carolina”, https://gridcensus.com/substations/south-carolina/tap146890-8feeb80c (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 TAP146890 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.