Substation-Adjacent Datacenter Sites in Maryland
At a glance
Parcels sited next to existing transmission substations. Co-location with a substation is the single strongest speed-to-power signal — interconnection distance is measured in feet, not miles.
Top substation-adjacent sites in Maryland
| Site | Type | County | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|---|
| ROCK SPRINGS | Substation-Adjacent | Harford County | 500 kV | 1,000 MW | 5.3 yrs | 68.8 |
| WAUGH CHAPEL | Substation-Adjacent | Anne Arundel County | 500 kV | 1,000 MW | 5.3 yrs | 67.5 |
| BURCHES HILL | Substation-Adjacent | Prince George's County | 500 kV | 1,000 MW | 5.3 yrs | 66.9 |
| BRIGHTON | Substation-Adjacent | Howard County | 500 kV | 1,000 MW | 5.3 yrs | 66.8 |
| UNKNOWN162182 | Substation-Adjacent | Prince George's County | 500 kV | 1,000 MW | 5.3 yrs | 66.7 |
| UNKNOWN123195 | Substation-Adjacent | Baltimore city | 230 kV | 300 MW | 5.3 yrs | 64.9 |
| TOKOMA | Substation-Adjacent | District of Columbia | 230 kV | 300 MW | 5.3 yrs | 64.9 |
| CONASTONE | Substation-Adjacent | Harford County | 500 kV | 1,000 MW | 5.3 yrs | 64.7 |
| DOUBS | Substation-Adjacent | Frederick County | 500 kV | 1,000 MW | 5.3 yrs | 64.6 |
| BELLS MILL | Substation-Adjacent | Montgomery County | 230 kV | 300 MW | 5.3 yrs | 64.4 |
| TAP139171 | Substation-Adjacent | Howard County | 230 kV | 300 MW | 5.3 yrs | 64.3 |
| HIGH RIDGE | Substation-Adjacent | Howard County | 230 kV | 300 MW | 5.3 yrs | 64.3 |
| TAP139322 | Substation-Adjacent | Frederick County | 500 kV | 1,000 MW | 5.3 yrs | 64.3 |
| BRANDON SHORES | Substation-Adjacent | Baltimore city | 230 kV | 300 MW | 5.3 yrs | 64.1 |
| METZEROTT ROAD | Substation-Adjacent | District of Columbia | 230 kV | 300 MW | 5.3 yrs | 63.9 |
| DICKERSON | Substation-Adjacent | Loudoun County | 230 kV | 300 MW | 5.3 yrs | 63.5 |
| HOWARD | Substation-Adjacent | Howard County | 230 kV | 300 MW | 5.3 yrs | 63.5 |
| UNKNOWN122985 | Substation-Adjacent | Howard County | 230 kV | 300 MW | 5.3 yrs | 63.4 |
| TAP139174 | Substation-Adjacent | Anne Arundel County | 230 kV | 300 MW | 5.3 yrs | 63.3 |
| TAP139085 | Substation-Adjacent | Howard County | 230 kV | 300 MW | 5.3 yrs | 63.3 |
| GRANITE | Substation-Adjacent | Howard County | 230 kV | 300 MW | 5.3 yrs | 63.3 |
| RITCHIE | Substation-Adjacent | Prince George's County | 230 kV | 300 MW | 5.3 yrs | 63.1 |
| BUENA VISTA | Substation-Adjacent | Prince George's County | 230 kV | 300 MW | 5.3 yrs | 63.1 |
| QUINCE ORCHARD | Substation-Adjacent | Montgomery County | 230 kV | 300 MW | 5.3 yrs | 63.0 |
| NORBECK | Substation-Adjacent | Montgomery County | 230 kV | 300 MW | 5.3 yrs | 63.0 |
How does Maryland compare with other states for substation-adjacent sites?
With 314 sites, Maryland ranks 39th of the 52 states that have any substation-adjacent candidate sites. Texas leads with 3,635. Nationally, substation-adjacent sites average 57.5/100 DC Readiness, above the 53.2 average across all site types. Across every site type, Maryland averages 52.9, the 35th-highest of 52 states, and its candidate sites face an average interconnection-queue wait of 5.2 years.
Where are the highest-scoring substation-adjacent sites in Maryland?
The top 25 range from 68.8 to 63.0 on the 0–100 DC Readiness Score. They are concentrated in Howard County (7), Prince George's County (4), Montgomery County (3) and Harford County (2). By grid region, 25 are in PJM.
County pages: Howard County · Prince George's County · Montgomery County · Harford County
What power, fiber and flood exposure do these substation-adjacent sites have?
Of the top 25 substation-adjacent sites in Maryland, 25 have a recorded nearest-substation voltage, with a median of 230 kV; for 25 that substation is rated 230 kV or higher. Their counties have a median of 9 fixed fiber broadband providers in FCC data. The median distance to the nearest internet exchange facility is 11 km. The median interconnection-queue wait in their markets is 5.3 years. None of the 6 with a mapped FEMA flood zone sits in a high-risk (A or V) zone. 5 lie within 25 km of a binding transmission constraint.
Frequently asked questions
How many substation-adjacent datacenter sites are in Maryland?
GridCensus catalogs 314 substation-adjacent datacenter candidate sites in Maryland, 0.8% of the national total for this type (39th of 52 states).
What is a substation-adjacent datacenter site?
Parcels sited next to existing transmission substations. Co-location with a substation is the single strongest speed-to-power signal — interconnection distance is measured in feet, not miles.
What is the best substation-adjacent datacenter site in Maryland?
By DC Readiness Score, ROCK SPRINGS in Harford County ranks first at 68.8/100, followed by WAUGH CHAPEL in Anne Arundel County at 67.5.
Which Maryland counties have the best substation-adjacent sites?
The top 25 substation-adjacent sites in Maryland are concentrated in Howard County (7), Prince George's County (4), Montgomery County (3) and Harford County (2).
How does Maryland score for datacenters overall?
All 1,031 scored sites in Maryland average 52.9/100 DC Readiness, the 35th-highest of 52 states, against a national average of 53.2.
More on substation-adjacent sites and Maryland
- All datacenter sites in Maryland· 1,031 sites
- Substation-Adjacent datacenter sites nationwide· 38,820 sites
- Greenfield sites in Maryland· 256 sites
- Industrial sites in Maryland· 242 sites
- Former Mine sites in Maryland· 149 sites
- Federal Excess sites in Maryland· 60 sites
- Brownfield sites in Maryland· 10 sites
Substation-Adjacent sites in other states
- Substation-Adjacent sites in Texas· 3,635 sites
- Substation-Adjacent sites in California· 1,573 sites
- Substation-Adjacent sites in Florida· 1,539 sites
- Substation-Adjacent sites in Georgia· 1,530 sites
- Substation-Adjacent sites in Oklahoma· 1,344 sites
- Substation-Adjacent sites in Washington· 1,343 sites
- Substation-Adjacent sites in Minnesota· 1,270 sites
- Substation-Adjacent sites in Kentucky· 1,261 sites
Dataset updated . Screening estimates derived from public data sources.
About this data
Source: GridCensus composite of HIFLD transmission and substation data, EIA, FEMA National Risk Index, FCC broadband data, PeeringDB and ISO interconnection queues, as published October 10, 2026 — GridCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.
Cite as: GridCensus, “Substation-Adjacent datacenter sites in Maryland”, https://gridcensus.com/site-types/substation/maryland (data as of October 10, 2026).
Go deeper than the public screen
Every site and score for Substation-Adjacent sites in 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.