ANTIETAM
SubstationMaryland · THE POTOMAC EDISON COMPANY
ANTIETAM is an electric transmission substation in Maryland, operated by THE POTOMAC EDISON COMPANY. It is classified as sub-transmission (138 kv) and connects 2 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 |
|---|---|---|---|---|
| #30378 | 138 kV | THE POTOMAC EDISON COMPANY | IN SERVICE | 6.8 mi |
| #31867 | 138 kV | THE POTOMAC EDISON COMPANY | IN SERVICE | 9.9 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of ANTIETAM, 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 |
|---|---|---|---|---|---|---|---|
| DOUBS | Substation-Adjacent | MD | Frederick County | 500 kV | 1,000 MW | 3.1 yrs | 74.2 |
| BEDINGTON | Substation-Adjacent | WV | Berkeley County | 500 kV | 1,000 MW | 3.0 yrs | 71.8 |
| UNKNOWN122882 | Substation-Adjacent | MD | Washington County | 230 kV | 300 MW | 3.5 yrs | 71.1 |
| RINGGOLD | Substation-Adjacent | MD | Washington County | 230 kV | 300 MW | 3.1 yrs | 71.0 |
| MCCAIN | Substation-Adjacent | MD | Frederick County | 230 kV | 300 MW | 3.1 yrs | 70.9 |
| MONOCACY | Substation-Adjacent | MD | Frederick County | 230 kV | 300 MW | 3.1 yrs | 70.7 |
| UNKNOWN122897 | Substation-Adjacent | MD | Frederick County | 230 kV | 300 MW | 3.1 yrs | 70.2 |
| UNKNOWN122878 | Substation-Adjacent | MD | Washington County | 138 kV | 100 MW | 3.0 yrs | 69.6 |
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 ANTIETAM substation, Maryland. 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.