TAP139365
SubstationMaryland · DELMARVA POWER
At a glance
TAP139365 is an electric transmission substation in Maryland, operated by DELMARVA POWER. It is classified as distribution (69–115 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
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #114349 | 69 kV | DELMARVA POWER | IN SERVICE | 0.1 mi |
| #121984 | 69 kV | DELMARVA POWER | IN SERVICE | 10.8 mi |
| #146606 | 69 kV | DELMARVA POWER | IN SERVICE | 4.6 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP139365, 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 |
|---|---|---|---|---|---|---|---|
| UNKNOWN128197 | Substation-Adjacent | DE | Sussex County | 230 kV | 300 MW | 1.5 yrs | 60.3 |
| EC Near Seaford Delaware Plant | Greenfield | DE | Sussex | — | — | 1.5 yrs | 57.9 |
| EC Near Seaford Delaware Plant | Greenfield | DE | Sussex | — | — | 1.5 yrs | 57.6 |
| EC Near Seaford Delaware Plant | Greenfield | DE | Sussex | — | — | 1.5 yrs | 57.2 |
| OZ Sussex | Greenfield | DE | Sussex | — | — | 1.5 yrs | 57.1 |
| EC Near Seaford Delaware Plant | Greenfield | DE | Sussex | — | — | 1.5 yrs | 57.1 |
| UNKNOWN170941 | Substation-Adjacent | DE | Kent County | 138 kV | 100 MW | 1.5 yrs | 56.9 |
| UNKNOWN128214 | Substation-Adjacent | DE | Wicomico County | 138 kV | 100 MW | 1.5 yrs | 56.8 |
Who owns the transmission lines at TAP139365?
The 3 connected lines listed above are owned by DELMARVA POWER. Line voltages range from 69 kV to 69 kV. Their combined recorded length is about 15.4 miles.
How do candidate sites near TAP139365 score?
The 8 highest-scoring candidate sites within about 25 miles range from 57 to 60 on the 0–100 DC Readiness scale. They fall in Sussex County, Sussex, Kent County, Wicomico County. The Maryland average across 1,031 scored sites is 52.9. 314 of those Maryland sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
What voltage is TAP139365 substation?
TAP139365 has a maximum voltage of 69 kV. That places it in the 69–114 kV band. The median named US substation in this dataset is 115 kV, so TAP139365 is below the national midpoint.
How many transmission lines connect to TAP139365 substation?
3 transmission lines terminate at or pass through TAP139365 in the HIFLD line data. The connected lines listed here run at 69 kV. Together the listed lines cover about 15.4 miles.
Who owns TAP139365 substation?
HIFLD lists DELMARVA POWER as the operator of TAP139365.
Where is TAP139365 substation located?
TAP139365 is in Maryland at 38.4913, -75.7508. The datacenter candidate sites closest to it are in Sussex County, Sussex, Kent County.
Are there datacenter candidate sites near TAP139365 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP139365. The highest-scoring is UNKNOWN128197 at 60/100. Across Maryland, the average DC Readiness score is 52.9.
More in Maryland
About this data
Source: HIFLD Electric Substations and Transmission Lines (U.S. Department of Homeland Security), as published June 29, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: GridCensus, “TAP139365 substation, Maryland”, https://gridcensus.com/substations/maryland/tap139365-c3a73f6a (data as of June 29, 2026).
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
Every site and score for TAP139365 substation, Maryland is free to browse. Pro adds Watchtower on 25 sites, alerts when new candidate sites, datacenters or interconnection-queue requests appear in your markets, score and capacity history, and CSV export. Enterprise adds team seats, weekly data files for all 147,272 sites, the REST API and an MCP server for AI tools.