ROCKINGHAM
SubstationNorth Carolina · PROGRESS ENERGY CAROLINAS INC
At a glance
ROCKINGHAM is an electric transmission substation in North Carolina, on PROGRESS ENERGY CAROLINAS INC's transmission network. It is classified as high-voltage (230 kv) and connects 13 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 |
|---|---|---|---|---|
| #104836 | 230 kV | PROGRESS ENERGY CAROLINAS INC | IN SERVICE | 4.7 mi |
| #107347 | 230 kV | PROGRESS ENERGY CAROLINAS INC | IN SERVICE | 5.2 mi |
| #110122 | 230 kV | DUKE ENERGY PROGRESS - (NC) | IN SERVICE | 32.1 mi |
| #140267 | 230 kV | PROGRESS ENERGY CAROLINAS INC | IN SERVICE | 20.5 mi |
| #146667 | 230 kV | PROGRESS ENERGY CAROLINAS INC | IN SERVICE | 6.1 mi |
| #149246 | 230 kV | PROGRESS ENERGY CAROLINAS INC | IN SERVICE | 8.0 mi |
| #121268 | 230 kV | PROGRESS ENERGY CAROLINAS INC | IN SERVICE | 8.0 mi |
| #135302 | 230 kV | PROGRESS ENERGY CAROLINAS INC | IN SERVICE | 3.0 mi |
| #137827 | 230 kV | DUKE ENERGY PROGRESS - (NC) | IN SERVICE | 10.4 mi |
| #139655 | 230 kV | DUKE ENERGY PROGRESS - (NC) | IN SERVICE | 10.4 mi |
| #110873 | 115 kV | DUKE ENERGY PROGRESS - (NC) | IN SERVICE | 9.3 mi |
| #179301 | 115 kV | DUKE ENERGY PROGRESS - (NC) | IN SERVICE | 17.1 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of ROCKINGHAM, 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 |
|---|---|---|---|---|---|---|---|
| UNKNOWN114385 | Substation-Adjacent | NC | Richmond County | 500 kV | 1,000 MW | 5.3 yrs | 64.6 |
| CHERAW CASH ROAD | Substation-Adjacent | SC | Marlboro County | 230 kV | 300 MW | 3.9 yrs | 63.1 |
| SOCIETY HILL | Substation-Adjacent | SC | Marlboro County | 230 kV | 300 MW | 3.9 yrs | 63.1 |
| TAP148314 | Substation-Adjacent | SC | Marlboro County | 230 kV | 300 MW | 3.9 yrs | 63.0 |
| TAP148313 | Substation-Adjacent | SC | Marlboro County | 230 kV | 300 MW | 3.9 yrs | 62.9 |
| CHERAW REID PARK | Substation-Adjacent | SC | Chesterfield County | 230 kV | 300 MW | 3.9 yrs | 62.9 |
| UNKNOWN120928 | Substation-Adjacent | SC | Marlboro County | 230 kV | 300 MW | 3.9 yrs | 62.2 |
| UNKNOWN122328 | Substation-Adjacent | SC | Marlboro County | 230 kV | 300 MW | 3.9 yrs | 62.2 |
How does ROCKINGHAM compare with other substations in North Carolina?
North Carolina has 3,209 substation records in HIFLD, of which 106 carry a station name; the rest are unnamed tap points, risers and line ends. 54 named substations in the state are in ROCKINGHAM's 230–344 kV band (51% of named stations). 10 sit in a higher band. 10 named substations in North Carolina operate at 345 kV or above. The highest voltage recorded in the state is 500 kV, and the state median is 230 kV.
Who owns the transmission lines at ROCKINGHAM?
The 12 connected lines listed above are owned by PROGRESS ENERGY CAROLINAS INC, DUKE ENERGY PROGRESS - (NC). Line voltages range from 115 kV to 230 kV. Their combined recorded length is about 134.6 miles.
How do candidate sites near ROCKINGHAM score?
The 8 highest-scoring candidate sites within about 25 miles range from 62 to 65 on the 0–100 DC Readiness scale. They fall in Richmond County, Marlboro County, Chesterfield County. The North Carolina average across 2,778 scored sites is 55.1. 1,087 of those North Carolina sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
What voltage is ROCKINGHAM substation?
ROCKINGHAM 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 ROCKINGHAM is above the national midpoint.
How many transmission lines connect to ROCKINGHAM substation?
13 transmission lines terminate at or pass through ROCKINGHAM in the HIFLD line data. The connected lines listed here run at 230 kV, 115 kV. Together the listed lines cover about 134.6 miles.
Who owns ROCKINGHAM substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at ROCKINGHAM belong to PROGRESS ENERGY CAROLINAS INC, and others to DUKE ENERGY PROGRESS - (NC). GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is ROCKINGHAM substation located?
ROCKINGHAM is in North Carolina at 34.9038, -79.7583. The datacenter candidate sites closest to it are in Richmond County, Marlboro County, Chesterfield County.
Are there datacenter candidate sites near ROCKINGHAM substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of ROCKINGHAM. The highest-scoring is UNKNOWN114385 at 65/100. Across North Carolina, the average DC Readiness score is 55.1.
Other 230 kV substations in North Carolina
- LONGVIEW· 21 lines
- CLIFFSIDE· 18 lines
- PLEASANT GARDEN· 18 lines
- LEE· 17 lines
- MITCHELL RIVER· 17 lines
- ENO· 16 lines
- HARRISBURG· 16 lines
- MARSHALL STEAM STATION· 16 lines
- All named substations in North Carolina· 106 stations
- Datacenter candidate sites in North Carolina· 2,778 sites
- Brownfield and retired plant sites in North Carolina
- 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, “ROCKINGHAM substation, North Carolina”, https://gridcensus.com/substations/north-carolina/rockingham-062029c9 (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 ROCKINGHAM substation, North 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.