Key City
BrownfieldMankato, Blue Earth, Minnesota · Northern States Power Co - Minnesota
Key City is a natural gas plant in Mankato, Blue Earth, Minnesota, retired 2015-04-01. Retired generation sites are among the most attractive datacenter redevelopment targets: the existing interconnection was sized for roughly 72 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 Key City, ranked by DC Readiness.
| Site | Type | State | County | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|---|---|
| UNKNOWN132021 | Substation-Adjacent | MN | Le Sueur County | 345 kV | 600 MW | 1.4 yrs | 75.1 |
| WILMARTH | Substation-Adjacent | MN | Blue Earth County | 345 kV | 600 MW | 1.4 yrs | 74.9 |
| UNKNOWN132584 | Substation-Adjacent | MN | Blue Earth County | 345 kV | 600 MW | 1.4 yrs | 72.6 |
| Greenfield (HELENA - CEDAR MOUNTAIN) | Greenfield | MN | Scott County | 345 kV | 600 MW | 1.4 yrs | 71.4 |
| UNKNOWN129662 | Substation-Adjacent | MN | Blue Earth County | 115 kV | 100 MW | 1.4 yrs | 69.6 |
| Greenfield (HELENA - CEDAR MOUNTAIN) | Greenfield | MN | Sibley County | 345 kV | 600 MW | 1.4 yrs | 69.1 |
| Greenfield (UNKNOWN132021 - WILMARTH) | Greenfield | MN | Le Sueur County | 345 kV | 600 MW | 1.4 yrs | 69.0 |
| TAP138573 | Substation-Adjacent | MN | Blue Earth County | 115 kV | 100 MW | 1.4 yrs | 68.5 |
Nearby internet exchanges
- NP Belle Plaine (MSP1)Belle Plaine, MN · 4 networks
- Centersquare Minneapolis (MSP1)Shakopee, MN · 2 networks
See all datacenter sites in Minnesota →
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 Key City, Mankato, Blue Earth, Minnesota. 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.