TENNOLL
SubstationTennessee · TENNESSEE VALLEY AUTHORITY
At a glance
TENNOLL is an electric transmission substation in Tennessee, on TENNESSEE VALLEY AUTHORITY's transmission network. It is classified as unclassified and connects 1 transmission line. Substation proximity is one of the strongest speed-to-power signals for siting a datacenter — interconnection distance to an energized, high-voltage bus is often the binding constraint on time-to-energization.
Voltage & classification
Ownership
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #179238 | 161 kV | TENNESSEE VALLEY AUTHORITY | — | 3.4 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TENNOLL, ranked by DC Readiness. Sites this close to an energized substation carry a strong speed-to-power advantage.
| Site | Type | State | County | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|---|---|
| WIDOWS CREEK 500KV | Substation-Adjacent | AL | Dade County | 500 kV | 1,000 MW | 3.9 yrs | 73.0 |
| RACCOON MOUNTAIN | Substation-Adjacent | TN | Hamilton County | 500 kV | 1,000 MW | 3.9 yrs | 72.0 |
| BELLEFONTE | Substation-Adjacent | AL | Jackson County | 500 kV | 1,000 MW | 3.9 yrs | 68.3 |
| TAP152961 | Substation-Adjacent | AL | Jackson County | 500 kV | 1,000 MW | 3.9 yrs | 68.0 |
| OZ Hamilton | Greenfield | TN | Hamilton | — | — | 3.9 yrs | 67.8 |
| TAP153404 | Substation-Adjacent | AL | Jackson County | 500 kV | 1,000 MW | 3.9 yrs | 67.6 |
| OZ Hamilton | Greenfield | TN | Hamilton | — | — | 3.9 yrs | 67.3 |
| OZ Hamilton | Greenfield | TN | Hamilton | — | — | 3.9 yrs | 67.1 |
Who owns the transmission lines at TENNOLL?
The 1 connected line listed above is owned by TENNESSEE VALLEY AUTHORITY. Line voltages range from 161 kV to 161 kV. Their combined recorded length is about 3.4 miles.
How do candidate sites near TENNOLL score?
The 8 highest-scoring candidate sites within about 25 miles range from 67 to 73 on the 0–100 DC Readiness scale. They fall in Dade County, Hamilton County, Jackson County, Hamilton. The Tennessee average across 2,190 scored sites is 57. 886 of those Tennessee sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
How many transmission lines connect to TENNOLL substation?
1 transmission line terminate at or pass through TENNOLL in the HIFLD line data. The connected lines listed here run at 161 kV. Together the listed lines cover about 3.4 miles.
Who owns TENNOLL substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TENNOLL belong to TENNESSEE VALLEY AUTHORITY. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TENNOLL substation located?
TENNOLL is in Tennessee at 35.0501, -85.6418. The datacenter candidate sites closest to it are in Dade County, Hamilton County, Jackson County.
Are there datacenter candidate sites near TENNOLL substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TENNOLL. The highest-scoring is WIDOWS CREEK 500KV at 73/100. Across Tennessee, the average DC Readiness score is 57.
More in Tennessee
About this data
Source: HIFLD Electric Substations and Transmission Lines (U.S. Department of Homeland Security), as published June 29, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: GridCensus, “TENNOLL substation, Tennessee”, https://gridcensus.com/substations/tennessee/tennoll-4d4a0fc4 (data as of June 29, 2026).
Dataset updated . Screening estimates derived from public data sources.
Substation attributes are derived from public HIFLD / EIA infrastructure data and may lag real-world upgrades or retirements. Voltage and connected-line counts are screening figures — confirm available capacity and interconnection terms directly with the operating utility and ISO.
Go deeper than the public screen
Every site and score for TENNOLL substation, Tennessee is free to browse. Pro adds Watchtower on 25 sites, alerts when new candidate sites, datacenters or interconnection-queue requests appear in your markets, score and capacity history, and CSV export. Enterprise adds team seats, weekly data files for all 147,272 sites, the REST API and an MCP server for AI tools.