TAP139075
SubstationMaryland · BALTIMORE GAS & ELECTRIC CO
At a glance
TAP139075 is an electric transmission substation in Maryland, on BALTIMORE GAS & ELECTRIC CO's transmission network. 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
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #103442 | 115 kV | BALTIMORE GAS & ELECTRIC CO | IN SERVICE | 3.0 mi |
| #132368 | 115 kV | BALTIMORE GAS & ELECTRIC CO | IN SERVICE | 8.6 mi |
| #144150 | 115 kV | BALTIMORE GAS & ELECTRIC CO | IN SERVICE | 0.1 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP139075, 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 |
| BRIGHTON | Substation-Adjacent | MD | Howard County | 500 kV | 1,000 MW | 5.3 yrs | 66.8 |
| SWINKS MILL | Substation-Adjacent | VA | Falls Church city | 230 kV | 300 MW | 5.1 yrs | 66.3 |
| CIA | Substation-Adjacent | VA | Falls Church city | 230 kV | 300 MW | 5.1 yrs | 65.6 |
| UNKNOWN123195 | Substation-Adjacent | MD | Baltimore city | 230 kV | 300 MW | 5.3 yrs | 64.9 |
| TOKOMA | Substation-Adjacent | MD | District of Columbia | 230 kV | 300 MW | 5.3 yrs | 64.9 |
| CONASTONE | Substation-Adjacent | MD | Harford County | 500 kV | 1,000 MW | 5.3 yrs | 64.7 |
| BELLS MILL | Substation-Adjacent | MD | Montgomery County | 230 kV | 300 MW | 5.3 yrs | 64.4 |
Who owns the transmission lines at TAP139075?
The 3 connected lines listed above are owned by BALTIMORE GAS & ELECTRIC CO. Line voltages range from 115 kV to 115 kV. Their combined recorded length is about 11.8 miles.
How do candidate sites near TAP139075 score?
The 8 highest-scoring candidate sites within about 25 miles range from 64 to 68 on the 0–100 DC Readiness scale. They fall in Anne Arundel County, Howard County, Falls Church city, Baltimore 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 TAP139075 substation?
TAP139075 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 TAP139075 is at the national midpoint.
How many transmission lines connect to TAP139075 substation?
3 transmission lines terminate at or pass through TAP139075 in the HIFLD line data. The connected lines listed here run at 115 kV. Together the listed lines cover about 11.8 miles.
Who owns TAP139075 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TAP139075 belong to BALTIMORE GAS & ELECTRIC CO. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TAP139075 substation located?
TAP139075 is in Maryland at 39.3380, -76.8368. The datacenter candidate sites closest to it are in Anne Arundel County, Howard County, Falls Church city.
Are there datacenter candidate sites near TAP139075 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP139075. 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, “TAP139075 substation, Maryland”, https://gridcensus.com/substations/maryland/tap139075-d38b92a8 (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 TAP139075 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.