SOUTHWEST
SubstationVirginia · POTOMAC ELECTRIC POWER CO
SOUTHWEST is an electric transmission substation in Virginia, operated by POTOMAC ELECTRIC POWER CO. It is classified as high-voltage (230 kv) and connects 10 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 & operation
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #1480 | 230 kV | VIRGINIA ELECTRIC & POWER CO | IN SERVICE | 4.0 mi |
| #2089 | 230 kV | VIRGINIA ELECTRIC & POWER CO | IN SERVICE | 6.0 mi |
| #41668 | 230 kV | VIRGINIA ELECTRIC & POWER CO | IN SERVICE | 9.7 mi |
| #50435 | 230 kV | VIRGINIA ELECTRIC & POWER CO | IN SERVICE | 7.1 mi |
| #14523 | 138 kV | POTOMAC ELECTRIC POWER CO | IN SERVICE | 0.9 mi |
| #38279 | 138 kV | POTOMAC ELECTRIC POWER CO | — | 2.4 mi |
| #38280 | 138 kV | POTOMAC ELECTRIC POWER CO | IN SERVICE | 3.4 mi |
| #11394 | 138 kV | POTOMAC ELECTRIC POWER CO | IN SERVICE | 0.9 mi |
| #27753 | 115 kV | VIRGINIA ELECTRIC & POWER CO | IN SERVICE | 1.9 mi |
| #13422 | 115 kV | VIRGINIA ELECTRIC & POWER CO | IN SERVICE | 10.4 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of SOUTHWEST, 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 |
|---|---|---|---|---|---|---|---|
| ELMONT | Substation-Adjacent | VA | Hanover County | 500 kV | 1,000 MW | 3.1 yrs | 79.3 |
| CHANCELLOR | Substation-Adjacent | VA | Fredericksburg city | 500 kV | 1,000 MW | 3.1 yrs | 76.0 |
| SHORT PUMP | Substation-Adjacent | VA | Hanover County | 230 kV | 300 MW | 3.0 yrs | 74.6 |
| MORGANTOWN GENERATING PLANT | Substation-Adjacent | MD | Charles County | 230 kV | 300 MW | 3.1 yrs | 73.7 |
| FOUR RIVERS | Substation-Adjacent | VA | Hanover County | 230 kV | 300 MW | 3.1 yrs | 73.7 |
| MOUNTAIN ROAD | Substation-Adjacent | VA | Hanover County | 230 kV | 300 MW | 3.1 yrs | 73.5 |
| FREDERICKSBURG | Substation-Adjacent | VA | Fredericksburg city | 230 kV | 300 MW | 3.1 yrs | 72.9 |
| BEAR ISLAND | Substation-Adjacent | VA | Hanover County | 230 kV | 300 MW | 3.1 yrs | 72.6 |
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 SOUTHWEST 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.