DUNN
SubstationAlabama · TENNESSEE VALLEY AUTHORITY
DUNN is an electric transmission substation in Alabama, operated by TENNESSEE VALLEY AUTHORITY. It is classified as sub-transmission (138 kv) 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
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #8749 | 161 kV | TENNESSEE VALLEY AUTHORITY | IN SERVICE | 17.4 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of DUNN, 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 |
|---|---|---|---|---|---|---|---|
| BROWNS FERRY | Substation-Adjacent | AL | Limestone County | 500 kV | 1,000 MW | 3.7 yrs | 75.7 |
| HOHENWALD | Substation-Adjacent | TN | Lewis County | 161 kV | 100 MW | 3.7 yrs | 70.8 |
| LAWRENCEBURG | Substation-Adjacent | TN | Lewis County | 161 kV | 100 MW | 3.7 yrs | 69.9 |
| TAP153056 | Substation-Adjacent | TN | Maury County | 161 kV | 100 MW | 3.7 yrs | 69.8 |
| DUNN | Substation-Adjacent | TN | Lawrence County | 161 kV | 100 MW | 3.7 yrs | 69.8 |
| DUNN | Substation-Adjacent | TN | Maury County | 161 kV | 100 MW | 3.7 yrs | 69.7 |
| PULASKI | Substation-Adjacent | TN | Giles County | 161 kV | 100 MW | 3.7 yrs | 69.2 |
| FIVE POINTS | Substation-Adjacent | TN | Lawrence County | 161 kV | 100 MW | 3.7 yrs | 69.1 |
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
This page shows a public slice of the GridCensus dataset for DUNN substation, Alabama. 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.