Hennepin Power Station
BrownfieldHennepin, Putnam, Illinois · Dynegy Midwest Generation Inc
Hennepin Power Station is a coal plant in Hennepin, Putnam, Illinois, retired 2019-11-01. Retired generation sites are among the most attractive datacenter redevelopment targets: the existing interconnection was sized for roughly 306 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 Hennepin Power Station, ranked by DC Readiness.
| Site | Type | State | County | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|---|---|
| EC Coal Marshall County | Greenfield | IL | Marshall County | — | — | 4.6 yrs | 61.2 |
| OZ Marshall | Greenfield | IL | Marshall | — | — | 4.6 yrs | 59.9 |
| UNKNOWN123090 | Substation-Adjacent | IL | Marshall County | 138 kV | 100 MW | 3.8 yrs | 59.8 |
| Hennepin Power Station | Brownfield | IL | Putnam County | 138 kV | 306 MW | 3.8 yrs | 59.5 |
| EC Coal Putnam County | Greenfield | IL | Putnam County | — | — | 4.6 yrs | 59.4 |
| EC Coal Marshall County | Greenfield | IL | Marshall County | — | — | 4.6 yrs | 59.4 |
| EC Coal Putnam County | Greenfield | IL | Putnam County | — | — | 4.6 yrs | 59.3 |
| EC Coal Marshall County | Greenfield | IL | Marshall County | — | — | 4.6 yrs | 58.9 |
Nearby internet exchanges
- SFN IL-PeoriaPeoria, IL · 5 networks
See all datacenter sites in Illinois →
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 Hennepin Power Station, Hennepin, Putnam, Illinois. 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.