QUINCE ORCHARD
SubstationMaryland · POTOMAC ELECTRIC POWER CO
At a glance
QUINCE ORCHARD is an electric transmission substation in Maryland, on POTOMAC ELECTRIC POWER CO's transmission network. It is classified as high-voltage (230 kv) and connects 12 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 |
|---|---|---|---|---|
| #104245 | 230 kV | POTOMAC ELECTRIC POWER CO | IN SERVICE | 11.6 mi |
| #113497 | 230 kV | — | IN SERVICE | 10.7 mi |
| #113913 | 230 kV | POTOMAC ELECTRIC POWER CO | IN SERVICE | 11.6 mi |
| #119712 | 230 kV | POTOMAC ELECTRIC POWER CO | IN SERVICE | 11.5 mi |
| #126359 | 230 kV | — | IN SERVICE | 10.2 mi |
| #126489 | 230 kV | — | IN SERVICE | 10.8 mi |
| #135752 | 230 kV | POTOMAC ELECTRIC POWER CO | IN SERVICE | 11.5 mi |
| #138418 | 230 kV | POTOMAC ELECTRIC POWER CO | IN SERVICE | 11.5 mi |
| #145265 | 230 kV | POTOMAC ELECTRIC POWER CO | IN SERVICE | 11.5 mi |
| #145361 | 230 kV | POTOMAC ELECTRIC POWER CO | IN SERVICE | 11.5 mi |
| #149487 | 230 kV | POTOMAC ELECTRIC POWER CO | IN SERVICE | 11.5 mi |
| #151088 | 230 kV | — | IN SERVICE | 10.2 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of QUINCE ORCHARD, 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 |
|---|---|---|---|---|---|---|---|
| BRAMBLETON | Substation-Adjacent | VA | Loudoun County | 500 kV | 1,000 MW | 5.1 yrs | 70.3 |
| GOOSE CREEK | Substation-Adjacent | VA | Loudoun County | 500 kV | 1,000 MW | 5.1 yrs | 69.9 |
| CLIFTON | Substation-Adjacent | VA | Manassas Park city | 500 kV | 1,000 MW | 5.1 yrs | 69.6 |
| MOSBY | Substation-Adjacent | VA | Manassas Park city | 500 kV | 1,000 MW | 5.1 yrs | 69.3 |
| CANNON BRANCH | Substation-Adjacent | VA | Manassas city | 230 kV | 300 MW | 5.1 yrs | 67.1 |
| DULLES | Substation-Adjacent | VA | Fairfax city | 230 kV | 300 MW | 5.1 yrs | 66.8 |
| BATTERY HEIGHTS DP | Substation-Adjacent | VA | Manassas city | 230 kV | 300 MW | 5.1 yrs | 66.8 |
| BRIGHTON | Substation-Adjacent | MD | Howard County | 500 kV | 1,000 MW | 5.3 yrs | 66.8 |
How does QUINCE ORCHARD compare with other substations in Maryland?
Maryland has 716 substation records in HIFLD, of which 186 carry a station name; the rest are unnamed tap points, risers and line ends. 44 named substations in the state are in QUINCE ORCHARD's 230–344 kV band (24% of named stations). 9 sit in a higher band. 9 named substations in Maryland operate at 345 kV or above. The highest voltage recorded in the state is 500 kV, and the state median is 138 kV.
Who owns the transmission lines at QUINCE ORCHARD?
The 12 connected lines listed above are owned by POTOMAC ELECTRIC POWER CO. Line voltages range from 230 kV to 230 kV. Their combined recorded length is about 134 miles.
How do candidate sites near QUINCE ORCHARD score?
The 8 highest-scoring candidate sites within about 25 miles range from 67 to 70 on the 0–100 DC Readiness scale. They fall in Loudoun County, Manassas Park city, Manassas city, Fairfax 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 QUINCE ORCHARD substation?
QUINCE ORCHARD has a maximum voltage of 230 kV. That places it in the 230–344 kV band. The median named US substation in this dataset is 115 kV, so QUINCE ORCHARD is above the national midpoint.
How many transmission lines connect to QUINCE ORCHARD substation?
12 transmission lines terminate at or pass through QUINCE ORCHARD in the HIFLD line data. The connected lines listed here run at 230 kV. Together the listed lines cover about 134 miles.
Who owns QUINCE ORCHARD substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at QUINCE ORCHARD belong to POTOMAC ELECTRIC POWER CO. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is QUINCE ORCHARD substation located?
QUINCE ORCHARD is in Maryland at 39.1367, -77.2933. The datacenter candidate sites closest to it are in Loudoun County, Manassas Park city, Manassas city.
Are there datacenter candidate sites near QUINCE ORCHARD substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of QUINCE ORCHARD. The highest-scoring is BRAMBLETON at 70/100. Across Maryland, the average DC Readiness score is 52.9.
Other 230 kV substations in Maryland
- OAK GROVE· 16 lines
- BURTONSVILLE· 15 lines
- PUMPHREY· 15 lines
- BRANDON SHORES· 14 lines
- BOWIE· 13 lines
- HAWKINS GATE· 13 lines
- MORGANTOWN· 12 lines
- MOUNT ZION· 12 lines
- All named substations in Maryland· 186 stations
- Datacenter candidate sites in Maryland· 1,031 sites
- Brownfield and retired plant sites in Maryland
- Substations by state
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, “QUINCE ORCHARD substation, Maryland”, https://gridcensus.com/substations/maryland/quince-orchard-bbca3187 (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 QUINCE ORCHARD 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.