ROCKCASTLE
SubstationVirginia · SOUTHSIDE ELECTRIC COOP, INC
ROCKCASTLE is an electric transmission substation in Virginia, operated by SOUTHSIDE ELECTRIC COOP, INC. It is classified as sub-transmission (138 kv) and connects 4 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 |
|---|---|---|---|---|
| #23849 | 138 kV | — | IN SERVICE | 1.3 mi |
| #38051 | 138 kV | — | IN SERVICE | 5.1 mi |
| #42620 | 138 kV | SOUTHSIDE ELECTRIC COOP, INC | IN SERVICE | 8.7 mi |
| #47431 | 138 kV | — | IN SERVICE | 7.1 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of ROCKCASTLE, 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 |
|---|---|---|---|---|---|---|---|
| CLOVERDALE EAST | Substation-Adjacent | VA | Botetourt County | 500 kV | 1,000 MW | 3.0 yrs | 75.6 |
| CLOVERDALE | Substation-Adjacent | VA | Roanoke city | 345 kV | 600 MW | 3.0 yrs | 74.5 |
| Greenfield (CLOVERDALE 765KV - JOSHUA FALL) | Greenfield | VA | Bedford County | 765 kV | 1,000 MW | 3.0 yrs | 71.0 |
| Multitrade of Pittsylvania LP | Brownfield | VA | Campbell | — | 90 MW | — | 70.8 |
| Greenfield (CLOVERDALE 765KV - JOSHUA FALL) | Greenfield | VA | Bedford County | 765 kV | 1,000 MW | 3.0 yrs | 70.5 |
| REUSENS | Substation-Adjacent | VA | Lynchburg city | 138 kV | 100 MW | 3.0 yrs | 69.6 |
| UNKNOWN171704 | Substation-Adjacent | VA | Roanoke city | 138 kV | 100 MW | 3.0 yrs | 69.5 |
| SMITH MOUNTAIN | Substation-Adjacent | VA | Lynchburg city | 138 kV | 100 MW | 3.0 yrs | 69.3 |
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
This page shows a public slice of the GridCensus dataset for ROCKCASTLE substation, Virginia. Pro and Enterprise plans unlock the full 164,098-site catalog, raw sub-scores, parcel ownership, interconnection-queue detail, saved searches, and programmatic API access.