Former Mine Datacenter Sites in Maryland
At a glance
Decommissioned or active mining land. Mine sites often retain heavy electrical service and water rights from prior operations, and many sit near coal-plant substations now freeing up grid capacity.
Top former mine sites in Maryland
| Site | Type | County | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|---|
| Mine Site | Former Mine | Anne Arundel County | — | — | 5.3 yrs | 54.2 |
| Mine Site | Former Mine | Prince George's County | — | — | 5.3 yrs | 54.1 |
| Mine Site | Former Mine | Baltimore County | — | — | 5.3 yrs | 53.3 |
| Mine Site | Former Mine | Montgomery County | — | — | 5.3 yrs | 53.2 |
| Mine Site | Former Mine | Baltimore County | — | — | 5.3 yrs | 53.0 |
| Mine Site | Former Mine | Baltimore County | — | — | 5.3 yrs | 53.0 |
| Mine Site | Former Mine | Baltimore County | — | — | 5.3 yrs | 53.0 |
| Mine Site | Former Mine | Anne Arundel County | — | — | 5.3 yrs | 53.0 |
| Mine Site | Former Mine | Baltimore County | — | — | 5.3 yrs | 53.0 |
| Mine Site | Former Mine | Anne Arundel County | — | — | 5.3 yrs | 53.0 |
| Mine Site | Former Mine | Anne Arundel County | — | — | 5.3 yrs | 52.9 |
| Mine Site | Former Mine | Anne Arundel County | — | — | 5.3 yrs | 52.9 |
| Mine Site | Former Mine | Anne Arundel County | — | — | 5.3 yrs | 52.6 |
| Mine Site | Former Mine | Baltimore County | — | — | 5.3 yrs | 52.5 |
| Mine Site | Former Mine | Anne Arundel County | — | — | 5.3 yrs | 52.4 |
| Mine Site | Former Mine | Anne Arundel County | — | — | 5.3 yrs | 52.4 |
| Mine Site | Former Mine | Baltimore County | — | — | 5.3 yrs | 52.4 |
| Mine Site | Former Mine | Baltimore County | — | — | 5.3 yrs | 52.3 |
| Mine Site | Former Mine | Baltimore County | — | — | 5.3 yrs | 52.3 |
| Mine Site | Former Mine | Prince George's County | — | — | 5.3 yrs | 52.2 |
| Mine Site | Former Mine | Prince George's County | — | — | 5.3 yrs | 51.8 |
| Mine Site | Former Mine | Harford County | — | — | 5.3 yrs | 51.8 |
| Mine Site | Former Mine | Cecil County | — | — | 5.3 yrs | 51.2 |
| Mine Site | Former Mine | Baltimore County | — | — | 5.3 yrs | 50.6 |
| Mine Site | Former Mine | Prince George's County | — | — | 5.3 yrs | 50.6 |
How does Maryland compare with other states for former mine sites?
With 149 sites, Maryland ranks 39th of the 50 states that have any former mine candidate sites. Kentucky leads with 5,049. Nationally, former mine sites average 50.2/100 DC Readiness, below 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 former mine sites in Maryland?
The top 25 range from 54.2 to 50.6 on the 0–100 DC Readiness Score. They are concentrated in Baltimore County (10), Anne Arundel County (8) and Prince George's County (4). By grid region, 25 are in PJM.
County pages: Baltimore County · Anne Arundel County · Prince George's County · Montgomery County
What power, fiber and flood exposure do these former mine sites have?
Their counties have a median of 10 fixed fiber broadband providers in FCC data. The median distance to the nearest internet exchange facility is 14 km. The median interconnection-queue wait in their markets is 5.3 years. None of the 4 with a mapped FEMA flood zone sits in a high-risk (A or V) zone. 2 lie within 25 km of a binding transmission constraint.
Frequently asked questions
How many former mine datacenter sites are in Maryland?
GridCensus catalogs 149 former mine datacenter candidate sites in Maryland, 0.6% of the national total for this type (39th of 50 states).
What is a former mine datacenter site?
Decommissioned or active mining land. Mine sites often retain heavy electrical service and water rights from prior operations, and many sit near coal-plant substations now freeing up grid capacity.
What is the best former mine datacenter site in Maryland?
By DC Readiness Score, Mine Site in Anne Arundel County ranks first at 54.2/100, followed by Mine Site in Prince George's County at 54.1.
Which Maryland counties have the best former mine sites?
The top 25 former mine sites in Maryland are concentrated in Baltimore County (10), Anne Arundel County (8) and Prince George's County (4).
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 former mine sites and Maryland
- All datacenter sites in Maryland· 1,031 sites
- Former Mine datacenter sites nationwide· 26,205 sites
- Substation-Adjacent sites in Maryland· 314 sites
- Greenfield sites in Maryland· 256 sites
- Industrial sites in Maryland· 242 sites
- Federal Excess sites in Maryland· 60 sites
- Brownfield sites in Maryland· 10 sites
Former Mine sites in other states
- Former Mine sites in Kentucky· 5,049 sites
- Former Mine sites in Pennsylvania· 3,356 sites
- Former Mine sites in West Virginia· 2,495 sites
- Former Mine sites in Virginia· 1,614 sites
- Former Mine sites in Alabama· 1,069 sites
- Former Mine sites in Texas· 935 sites
- Former Mine sites in Ohio· 925 sites
- Former Mine sites in Tennessee· 661 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, “Former Mine datacenter sites in Maryland”, https://gridcensus.com/site-types/mine/maryland (data as of October 10, 2026).
Go deeper than the public screen
Every site and score for Former Mine 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.