TAP139170
SubstationMaryland
At a glance
TAP139170 is an electric transmission substation in Maryland. It is classified as sub-transmission (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
Ownership
No owner is recorded for the lines that connect here.
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP139170, 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 | 5.3 yrs | 67.5 |
| BURCHES HILL | Substation-Adjacent | MD | Prince George's County | 500 kV | 1,000 MW | 5.3 yrs | 66.9 |
| BRIGHTON | Substation-Adjacent | MD | Howard County | 500 kV | 1,000 MW | 5.3 yrs | 66.8 |
| CIA | Substation-Adjacent | VA | Falls Church city | 230 kV | 300 MW | 5.1 yrs | 65.6 |
| TAP139314 | Substation-Adjacent | VA | Alexandria city | 230 kV | 300 MW | 5.1 yrs | 65.6 |
| POTOMAC YARD | Substation-Adjacent | VA | Alexandria city | 230 kV | 300 MW | 5.1 yrs | 65.5 |
| NORTH ALEXANDRIA | Substation-Adjacent | VA | Alexandria city | 230 kV | 300 MW | 5.1 yrs | 65.4 |
| FALLS CHURCH | Substation-Adjacent | VA | Falls Church city | 230 kV | 300 MW | 5.1 yrs | 65.3 |
How do candidate sites near TAP139170 score?
The 8 highest-scoring candidate sites within about 25 miles range from 65 to 68 on the 0–100 DC Readiness scale. They fall in Anne Arundel County, Prince George's County, Howard County, Falls Church city. 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 TAP139170 substation?
TAP139170 has a maximum voltage of 115 kV. That places it in the 115–229 kV band. The median named US substation in this dataset is 115 kV, so TAP139170 is at the national midpoint.
How many transmission lines connect to TAP139170 substation?
3 transmission lines terminate at or pass through TAP139170 in the HIFLD line data.
Where is TAP139170 substation located?
TAP139170 is in Maryland at 39.1036, -76.7684. The datacenter candidate sites closest to it are in Anne Arundel County, Prince George's County, Howard County.
Are there datacenter candidate sites near TAP139170 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP139170. The highest-scoring is WAUGH CHAPEL at 68/100. 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, “TAP139170 substation, Maryland”, https://gridcensus.com/substations/maryland/tap139170-f49fb19b (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 TAP139170 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.