CATOCTIN
SubstationMaryland · THE POTOMAC EDISON CO
CATOCTIN is an electric transmission substation in Maryland, operated by THE POTOMAC EDISON CO. It is classified as sub-transmission (138 kv) and connects 3 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 |
|---|---|---|---|---|
| #22469 | 138 kV | THE POTOMAC EDISON COMPANY | IN SERVICE | 10.9 mi |
| #36131 | 138 kV | THE POTOMAC EDISON CO | IN SERVICE | 12.7 mi |
| #46433 | 138 kV | THE POTOMAC EDISON COMPANY | IN SERVICE | 9.8 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of CATOCTIN, 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 |
|---|---|---|---|---|---|---|---|
| TAP139321 | Substation-Adjacent | MD | Montgomery County | 500 kV | 1,000 MW | 3.1 yrs | 75.6 |
| CLARKSBURG | Substation-Adjacent | MD | Montgomery County | 230 kV | 300 MW | 3.1 yrs | 74.8 |
| DOUBS | Substation-Adjacent | MD | Frederick County | 500 kV | 1,000 MW | 3.1 yrs | 74.2 |
| HUNTERSTOWN POWER PLANT | Substation-Adjacent | PA | Adams County | 500 kV | 1,000 MW | 3.0 yrs | 73.7 |
| UNKNOWN123462 | Substation-Adjacent | PA | Adams County | 500 kV | 1,000 MW | 3.0 yrs | 73.7 |
| UNKNOWN122905 | Substation-Adjacent | MD | Montgomery County | 230 kV | 300 MW | 3.1 yrs | 73.6 |
| 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 |
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 CATOCTIN 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.