Greenfield Light Plant
BrownfieldGreenfield, Adair, Iowa · City of Greenfield - (IA)
Greenfield Light Plant is a oil plant in Greenfield, Adair, Iowa, retired 2018-12-01. Retired generation sites are among the most attractive datacenter redevelopment targets: the existing interconnection was sized for roughly 6 MW of generation, so the grid hookup, transmission rights, and often cooling-water access are already in place — collapsing the speed-to-power timeline versus a greenfield build.
Former use & capacity
Grid hookup & remediation
Nearby datacenter candidate sites
Scored candidate sites near Greenfield Light Plant, ranked by DC Readiness.
| Site | Type | State | County | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|---|---|
| ROLLING HILLS | Substation-Adjacent | IA | Adams County | 345 kV | 600 MW | 1.4 yrs | 72.7 |
| GUTHRIE CENTER | Substation-Adjacent | IA | Guthrie County | 161 kV | 100 MW | 1.4 yrs | 68.7 |
| UNKNOWN131419 | Substation-Adjacent | IA | Madison County | 161 kV | 100 MW | 1.4 yrs | 67.9 |
| UNKNOWN137682 | Substation-Adjacent | IA | Guthrie County | 161 kV | 100 MW | 1.4 yrs | 67.0 |
| Greenfield (ROLLING HILLS - MADISON COUNTY) | Greenfield | IA | Union County | 345 kV | 600 MW | 1.4 yrs | 66.3 |
| Greenfield (ROLLING HILLS - MADISON COUNTY) | Greenfield | IA | Madison County | 345 kV | 600 MW | 1.4 yrs | 66.3 |
| UNKNOWN131000 | Substation-Adjacent | IA | Cass County | 161 kV | 100 MW | 1.4 yrs | 66.3 |
| Greenfield (ATCHISON - BOONEVILLE) | Greenfield | IA | Madison County | 345 kV | 600 MW | 3.5 yrs | 66.1 |
See all datacenter sites in Iowa →
Dataset updated . Screening estimates derived from public data sources.
Brownfield attributes are derived from EIA retired-generator and EPA public data. Existing capacity reflects the retired plant's historical nameplate, not deliverable interconnection for a new load. Confirm reusable interconnection rights, remediation status, and site availability with the utility, ISO, and current owner.
Go deeper than the public screen
This page shows a public slice of the GridCensus dataset for Greenfield Light Plant, Greenfield, Adair, Iowa. Pro and Enterprise plans unlock the full 164,098-site catalog, raw sub-scores, parcel ownership, interconnection-queue detail, saved searches, and programmatic API access.