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
Site conditions & market — Humphreys County
County-level intelligence for this site's location — the power economics, water, hazard, connectivity, and workforce a developer screens before ever visiting. Assembled from FEMA NRI, BLS QCEW, FCC BDC, USGS water-use, and EIA.
Market & workforce
Power economics & interconnection
Water & cooling
Hazard, flood & connectivity
County-level context — address-level utility offerings and flood zoning vary within the county. Confirm site-specific service with the utility and a Phase I ESA.
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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 | 1.0 yrs | 73.5 |
| CUMBERLAND 500KV | Substation-Adjacent | TN | Houston County | 500 kV | 1,000 MW | 1.0 yrs | 71.6 |
| Greenfield (JOHNSONVILLE - GLEASON) | Greenfield | TN | Benton County | 500 kV | 1,000 MW | 1.0 yrs | 64.8 |
| UNKNOWN120769 | Substation-Adjacent | TN | Houston County | 161 kV | 100 MW | 1.0 yrs | 63.7 |
| TAP170452 | Substation-Adjacent | TN | Humphreys County | 161 kV | 100 MW | 1.0 yrs | 63.7 |
| TAP152198 | Substation-Adjacent | TN | Humphreys County | 161 kV | 100 MW | 1.0 yrs | 63.7 |
| Greenfield (JOHNSONVILLE - GLEASON) | Greenfield | TN | Carroll County | 500 kV | 1,000 MW | 1.0 yrs | 63.7 |
| TAP152133 | Substation-Adjacent | TN | Henry County | 161 kV | 100 MW | 1.0 yrs | 63.5 |
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 147,272-site catalog, raw sub-scores, parcel ownership, interconnection-queue detail, saved searches, and programmatic API access.