Brownfield & Retired Power Plant Sites in Maryland
31 catalogued brownfield and retired-generation sites in Maryland, listed by former capacity. Each carries an existing utility-scale grid interconnection that a new datacenter load may be able to re-use.
At a glance
What kinds of former sites are in Maryland?
By former use, the list includes 9 landfill, 8 natural gas, 5 coal, 5 oil, 4 Superfund. Recorded retirement dates run from September 2000 to June 2024, with 16 retirements in 2015 or later. 26 of 27 sites with a measured distance sit within 2 miles of a transmission substation.
How does Maryland compare with other states?
Maryland ranks 24th of 50 states and DC by number of brownfield and retired-generation sites, out of 2,085 nationally. By recorded capacity (4,310 MW) it ranks 23rd, against 289,280 MW across all states. The state also has 1,031 scored datacenter candidate sites, 10 of them classed as brownfield sites, averaging 52.9 on the 0–100 DC Readiness scale.
Where in Maryland are these sites?
- Montgomery County · 3
- Baltimore City County · 3
- Baltimore County · 2
- Anne Arundel County · 2
- Charles County · 1
- Prince Georges County · 1
- Cecil County · 1
- Allegany County · 1
- Harford County · 1
- Worcester County · 1
- Talbot County · 1
- Somerset County · 1
All brownfield and retired plant sites in Maryland
| Site | Former use | Capacity | Retired | County |
|---|---|---|---|---|
| Morgantown Generating Plant | coal | 1,418 MW | 2024-06-01 | Charles |
| Chalk Point Steam | coal | 728 MW | 2021-06-01 | Prince Georges |
| Dickerson | coal | 588 MW | 2020-08-01 | Montgomery |
| Essential Power Rock Springs LLC | gas | 390 MW | — | Cecil |
| Riverside (MD) | gas | 257 MW | 2019-12-01 | Baltimore |
| AES Warrior Run Cogeneration Facility | coal | 229 MW | 2024-06-01 | Allegany |
| Notch Cliff | gas | 144 MW | 2020-06-01 | Baltimore |
| Herbert A Wagner | coal | 136 MW | 2020-06-01 | Anne Arundel |
| Westport | gas | 122 MW | 2020-06-01 | Baltimore City |
| Gould Street | gas | 104 MW | 2019-06-01 | Baltimore City |
| Perryman | oil | 53 MW | 2016-02-01 | Harford |
| NIH Cogeneration Facility | gas | 22 MW | 2018-10-01 | Montgomery |
| Dickerson Power | oil | 19 MW | 2022-10-01 | Montgomery |
| Fort Detrick (Solar) | superfund | 19 MW | — | — |
| Berlin | oil | 18 MW | 2020-05-01 | Worcester |
| Annapolis Renewable Energy Park | landfill | 17 MW | — | — |
| Fort George G. Meade | superfund | 14 MW | — | — |
| Panorama Landfill Solar | landfill | 7 MW | — | — |
| Fort Detrick Area B Ground Water (Battery) | superfund | 6 MW | — | — |
| Easton | oil | 3 MW | 2023-10-01 | Talbot |
| Domino Sugar Baltimore | gas | 3 MW | 2000-09-01 | Baltimore City |
| Washington County Rubble Landfill #1 | landfill | 3 MW | — | — |
| Resh Road Landfill (Resh S1) | landfill | 3 MW | — | — |
| Washington County Rubble Landfill #2 | landfill | 3 MW | — | — |
| Forty West Landfill | landfill | 2 MW | — | — |
| Frederick County Landfill Solar | landfill | 2 MW | — | — |
| Green Machine | gas | 2 MW | 2016-09-01 | Anne Arundel |
| Smith Island | oil | 1 MW | 2021-05-01 | Somerset |
| Former Ellicott City Landfill | landfill | 1 MW | — | — |
| Hood's Mill Landfill | landfill | 0 MW | — | — |
| Beltsville Agricultural Research Center (USDA) | superfund | — | — | — |
Frequently asked questions
How many retired power plants are in Maryland?
GridCensus lists 18 retired power plant sites in Maryland from EIA-860 retirement records. 17 have a recorded retirement date, 16 of them in 2015 or later.
What is the largest retired power plant or brownfield site in Maryland?
Morgantown Generating Plant in Newburg is the largest by recorded capacity, at 1,418 MW. It is followed by Chalk Point Steam (728 MW) and Dickerson (588 MW).
Which power plant in Maryland retired most recently?
Morgantown Generating Plant has the latest recorded retirement date in the state, June 2024, with 1,418 MW of capacity.
Which county in Maryland has the most brownfield and retired plant sites?
Montgomery County has the most, with 3, followed by Baltimore City County with 3.
How many EPA brownfield sites in Maryland have completed cleanup?
13 of the 13 EPA-tracked sites listed for Maryland are recorded as cleanup complete.
Looking for a specific record? The directory lists every brownfield site, A to Z.
More on Maryland, and states with similar counts
- Datacenter candidate sites in Maryland· 1,031 sites
- Electric substations in Maryland· 186 named
- Brownfield candidate sites nationwide
- Brownfield sites by state
- Brownfield sites in Alaska· 31 sites
- Brownfield sites in Vermont· 27 sites
- Brownfield sites in Colorado· 33 sites
- Brownfield sites in Nevada· 27 sites
About this data
Source: EIA-860 retired generating units and EPA RE-Powering America's Land contaminated-site records, as published March 6, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: GridCensus, “Brownfield and retired power plant sites in Maryland”, https://gridcensus.com/brownfield-sites/maryland (data as of March 6, 2026).
Dataset updated . Screening estimates derived from public data sources.
Go deeper than the public screen
Every site and score for brownfield 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.