Brownfield & Retired Power Plant Sites in Maine
25 catalogued brownfield and retired-generation sites in Maine, 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 Maine?
By former use, the list includes 13 landfill, 4 natural gas, 3 hydroelectric, 2 Superfund, 2 brownfield, 1 biomass. Recorded retirement dates run from June 1999 to January 2022, with 5 retirements in 2015 or later. 11 of 12 sites with a measured distance sit within 2 miles of a transmission substation.
How does Maine compare with other states?
Maine ranks 28th of 50 states and DC by number of brownfield and retired-generation sites, out of 2,085 nationally. By recorded capacity (183 MW) it ranks 48th, against 289,280 MW across all states. The state also has 1,183 scored datacenter candidate sites, 8 of them classed as brownfield sites, averaging 53.5 on the 0–100 DC Readiness scale.
Where in Maine are these sites?
- Androscoggin County · 2
- Hancock County · 1
- Penobscot County · 1
- Oxford County · 1
- Cumberland County · 1
- York County · 1
- Somerset County · 1
All brownfield and retired plant sites in Maine
Frequently asked questions
How many retired power plants are in Maine?
GridCensus lists 8 retired power plant sites in Maine from EIA-860 retirement records. 8 have a recorded retirement date, 5 of them in 2015 or later.
What is the largest retired power plant or brownfield site in Maine?
Bucksport Generation LLC in Bucksport is the largest by recorded capacity, at 111.6 MW. It is followed by Red Shield Envir Old Town Facility (16 MW) and Mead Rumford Cogen (12.5 MW).
Which power plant in Maine retired most recently?
Mead Rumford Cogen has the latest recorded retirement date in the state, January 2022, with 12.5 MW of capacity.
Which county in Maine has the most brownfield and retired plant sites?
Androscoggin County has the most, with 2, followed by Hancock County with 1.
How many EPA brownfield sites in Maine have completed cleanup?
17 of the 17 EPA-tracked sites listed for Maine are recorded as cleanup complete.
Looking for a specific record? The directory lists every brownfield site, A to Z.
More on Maine, and states with similar counts
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 Maine”, https://gridcensus.com/brownfield-sites/maine (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 Maine 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.