MOUNT ZION
SubstationVirginia · POTOMAC ELECTRIC POWER CO
MOUNT ZION is an electric transmission substation in Virginia, operated by POTOMAC ELECTRIC POWER CO. It is classified as high-voltage (230 kv) and connects 12 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 |
|---|---|---|---|---|
| #1399 | 230 kV | — | IN SERVICE | 3.7 mi |
| #3632 | 230 kV | POTOMAC ELECTRIC POWER CO | IN SERVICE | 11.5 mi |
| #6750 | 230 kV | POTOMAC ELECTRIC POWER CO | IN SERVICE | 11.4 mi |
| #10171 | 230 kV | POTOMAC ELECTRIC POWER CO | IN SERVICE | 4.4 mi |
| #18606 | 230 kV | — | IN SERVICE | 3.7 mi |
| #22179 | 230 kV | POTOMAC ELECTRIC POWER CO | IN SERVICE | 4.4 mi |
| #24027 | 230 kV | — | IN SERVICE | 3.7 mi |
| #33285 | 230 kV | — | IN SERVICE | 3.7 mi |
| #33592 | 230 kV | POTOMAC ELECTRIC POWER CO | IN SERVICE | 4.4 mi |
| #46606 | 230 kV | POTOMAC ELECTRIC POWER CO | IN SERVICE | 11.5 mi |
| #47075 | 230 kV | POTOMAC ELECTRIC POWER CO | IN SERVICE | 4.4 mi |
| #48843 | 230 kV | POTOMAC ELECTRIC POWER CO | IN SERVICE | 11.5 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of MOUNT ZION, 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 |
|---|---|---|---|---|---|---|---|
| WAUGH CHAPEL | Substation-Adjacent | MD | Anne Arundel County | 500 kV | 1,000 MW | 3.1 yrs | 77.7 |
| CONASTONE | Substation-Adjacent | MD | Baltimore County | 500 kV | 1,000 MW | 3.1 yrs | 77.1 |
| JOHNSON DP | Substation-Adjacent | VA | Manassas Park city | 230 kV | 300 MW | 3.1 yrs | 77.0 |
| WALNEY | Substation-Adjacent | VA | Fairfax city | 230 kV | 300 MW | 3.1 yrs | 76.8 |
| UNKNOWN162231 | Substation-Adjacent | VA | Loudoun County | 230 kV | 300 MW | 3.1 yrs | 76.6 |
| UNKNOWN116835 | Substation-Adjacent | VA | Manassas Park city | 230 kV | 300 MW | 3.1 yrs | 76.4 |
| RESTON | Substation-Adjacent | VA | Fairfax city | 230 kV | 300 MW | 3.1 yrs | 75.9 |
| SANDY SPRING | Substation-Adjacent | MD | Howard County | 230 kV | 300 MW | 3.1 yrs | 75.8 |
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 MOUNT ZION 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.