TAP139359
SubstationMaryland · DELMARVA POWER
At a glance
TAP139359 is an electric transmission substation in Maryland, on DELMARVA POWER's transmission network. 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 |
|---|---|---|---|---|
| #111190 | 69 kV | DELMARVA POWER | IN SERVICE | 0.0 mi |
| #121165 | 69 kV | DELMARVA POWER | IN SERVICE | 6.1 mi |
| #135813 | 69 kV | DELMARVA POWER | IN SERVICE | 3.6 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP139359, 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 |
|---|---|---|---|---|---|---|---|
| EC Near McKee Run | Greenfield | DE | Kent | — | — | 1.5 yrs | 59.4 |
| OZ Kent | Greenfield | MD | Kent | — | — | 5.3 yrs | 57.8 |
| UNKNOWN123228 | Substation-Adjacent | MD | Caroline County | 230 kV | 300 MW | 5.3 yrs | 57.5 |
| EC Near Seaford Delaware Plant | Greenfield | DE | Sussex | — | — | 1.5 yrs | 57.1 |
| EC Near Seaford Delaware Plant | Greenfield | DE | Sussex | — | — | 1.5 yrs | 56.6 |
| UNKNOWN123242 | Substation-Adjacent | MD | Dorchester County | 230 kV | 300 MW | 5.3 yrs | 56.6 |
| EC Near Seaford Delaware Plant | Greenfield | DE | Sussex | — | — | 1.5 yrs | 55.8 |
| Easton | Brownfield | MD | Talbot County | — | 3 MW | 5.3 yrs | 55.6 |
Who owns the transmission lines at TAP139359?
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 9.7 miles.
How do candidate sites near TAP139359 score?
The 8 highest-scoring candidate sites within about 25 miles range from 56 to 59 on the 0–100 DC Readiness scale. They fall in Kent, Caroline County, Sussex, Dorchester 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 TAP139359 substation?
TAP139359 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 TAP139359 is below the national midpoint.
How many transmission lines connect to TAP139359 substation?
3 transmission lines terminate at or pass through TAP139359 in the HIFLD line data. The connected lines listed here run at 69 kV. Together the listed lines cover about 9.7 miles.
Who owns TAP139359 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TAP139359 belong to DELMARVA POWER. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TAP139359 substation located?
TAP139359 is in Maryland at 38.8605, -76.0623. The datacenter candidate sites closest to it are in Kent, Caroline County, Sussex.
Are there datacenter candidate sites near TAP139359 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP139359. The highest-scoring is EC Near McKee Run at 59/100. 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, “TAP139359 substation, Maryland”, https://gridcensus.com/substations/maryland/tap139359-f77066b5 (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 TAP139359 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.