Johnsonville
BrownfieldNew Johnsonville, Humphreys, Tennessee · Tennessee Valley Authority
Johnsonville is a coal plant in New Johnsonville, Humphreys, Tennessee, retired 2017-12-01. Retired generation sites are among the most attractive datacenter redevelopment targets: the existing interconnection was sized for roughly 1,485 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 Johnsonville, ranked by DC Readiness.
| Site | Type | State | County | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|---|---|
| JOHNSONVILLE | Substation-Adjacent | TN | Benton County | 500 kV | 1,000 MW | 3.7 yrs | 73.0 |
| Greenfield (JOHNSONVILLE - CUMBERLAND 500K) | Greenfield | TN | Houston County | 500 kV | 1,000 MW | 3.7 yrs | 71.8 |
| UNKNOWN120769 | Substation-Adjacent | TN | Houston County | 161 kV | 100 MW | 3.7 yrs | 71.0 |
| Greenfield (DAVIDSON - JOHNSONVILLE) | Greenfield | TN | Humphreys County | 500 kV | 1,000 MW | 3.7 yrs | 70.6 |
| Greenfield (JOHNSONVILLE - GLEASON) | Greenfield | TN | Benton County | 500 kV | 1,000 MW | 3.7 yrs | 69.9 |
| Greenfield (DAVIDSON - JOHNSONVILLE) | Greenfield | TN | Humphreys County | 500 kV | 1,000 MW | 3.7 yrs | 69.3 |
| UNKNOWN159910 | Substation-Adjacent | TN | Benton County | 161 kV | 100 MW | 3.7 yrs | 69.0 |
| Greenfield (JOHNSONVILLE - CUMBERLAND 500K) | Greenfield | TN | Houston County | 500 kV | 1,000 MW | 3.7 yrs | 68.8 |
See all datacenter sites in Tennessee →
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 Johnsonville, New Johnsonville, Humphreys, Tennessee. 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.