Brownfield & Retired Power Plant Sites in Delaware
9 catalogued brownfield and retired-generation sites in Delaware, 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 Delaware?
By former use, the list includes 3 natural gas, 2 landfill, 2 Superfund, 1 coal, 1 manufacturing. Recorded retirement dates run from October 1997 to May 2021, with 1 retirements in 2015 or later. 9 of 9 sites with a measured distance sit within 2 miles of a transmission substation.
How does Delaware compare with other states?
Delaware ranks 45th of 50 states and DC by number of brownfield and retired-generation sites, out of 2,085 nationally. By recorded capacity (526 MW) it ranks 41st, against 289,280 MW across all states. The state also has 288 scored datacenter candidate sites, 2 of them classed as brownfield sites, averaging 57.1 on the 0–100 DC Readiness scale.
Where in Delaware are these sites?
- Sussex County · 2
- Kent County · 1
- New Castle County · 1
All brownfield and retired plant sites in Delaware
| Site | Former use | Capacity | Retired | County |
|---|---|---|---|---|
| Indian River Generating Station | coal | 340 MW | 2014-01-01 | Sussex |
| McKee Run | gas | 151 MW | 2021-05-01 | Kent |
| Seaford Delaware Plant | gas | 30 MW | 2010-01-01 | Sussex |
| North and South Peninsula | manufacturing | 2 MW | — | — |
| Delaware City Plant | gas | 1 MW | 1997-10-01 | New Castle |
| Ashland Solar Carports | landfill | 1 MW | — | — |
| DuPont Newport | superfund | 1 MW | — | — |
| McKees Solar Park | landfill | 0 MW | — | — |
| Dover Air Force Base | superfund | — | — | — |
Frequently asked questions
How many retired power plants are in Delaware?
GridCensus lists 4 retired power plant sites in Delaware from EIA-860 retirement records. 4 have a recorded retirement date, 1 of them in 2015 or later.
What is the largest retired power plant or brownfield site in Delaware?
Indian River Generating Station in Dagsboro is the largest by recorded capacity, at 340 MW. It is followed by McKee Run (151.2 MW) and Seaford Delaware Plant (30 MW).
Which power plant in Delaware retired most recently?
McKee Run has the latest recorded retirement date in the state, May 2021, with 151.2 MW of capacity.
Which county in Delaware has the most brownfield and retired plant sites?
Sussex County has the most, with 2, followed by Kent County with 1.
How many EPA brownfield sites in Delaware have completed cleanup?
5 of the 5 EPA-tracked sites listed for Delaware are recorded as cleanup complete.
Looking for a specific record? The directory lists every brownfield site, A to Z.
More on Delaware, and states with similar counts
- Datacenter candidate sites in Delaware· 288 sites
- Electric substations in Delaware· 39 named
- Brownfield candidate sites nationwide
- Brownfield sites by state
- Brownfield sites in South Dakota· 10 sites
- Brownfield sites in West Virginia· 9 sites
- Brownfield sites in Wyoming· 11 sites
- Brownfield sites in North Dakota· 8 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 Delaware”, https://gridcensus.com/brownfield-sites/delaware (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 Delaware 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.