TUNICA
SubstationArkansas · ENTERGY MISSISSIPPI INC
TUNICA is an electric transmission substation in Arkansas, operated by ENTERGY MISSISSIPPI INC. It is classified as high-voltage (230 kv) and connects 5 transmission lines. 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 |
|---|---|---|---|---|
| #19428 | 230 kV | — | IN SERVICE | 22.4 mi |
| #46068 | 230 kV | ENTERGY MISSISSIPPI INC | IN SERVICE | 16.0 mi |
| #28742 | 115 kV | ENTERGY MISSISSIPPI INC | IN SERVICE | 0.7 mi |
| #56525 | 115 kV | ENTERGY MISSISSIPPI INC | IN SERVICE | 16.7 mi |
| #56532 | 115 kV | ENTERGY MISSISSIPPI INC | IN SERVICE | 14.2 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TUNICA, 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 |
|---|---|---|---|---|---|---|---|
| FREEPORT | Substation-Adjacent | MS | DeSoto County | 500 kV | 1,000 MW | 1.4 yrs | 78.6 |
| SOUTHAVEN | Substation-Adjacent | MS | DeSoto County | 500 kV | 1,000 MW | 1.4 yrs | 75.9 |
| HORN LAKE | Substation-Adjacent | MS | DeSoto County | 230 kV | 300 MW | 1.4 yrs | 74.3 |
| TWINKLETOWN | Substation-Adjacent | MS | DeSoto County | 230 kV | 300 MW | 1.4 yrs | 70.0 |
| CHURCH ROAD | Substation-Adjacent | MS | DeSoto County | 230 kV | 300 MW | 1.4 yrs | 70.0 |
| Greenfield (WEST MEMPHIS SUBSTATION - KEO ) | Greenfield | AR | St. Francis County | 500 kV | 1,000 MW | 1.4 yrs | 69.1 |
| Greenfield (UNKNOWN115609 - FREEPORT) | Greenfield | MS | DeSoto County | 500 kV | 1,000 MW | 1.4 yrs | 69.1 |
| Greenfield (WEST MEMPHIS SUBSTATION - KEO ) | Greenfield | AR | St. Francis County | 500 kV | 1,000 MW | 1.4 yrs | 68.3 |
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.
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This page shows a public slice of the GridCensus dataset for TUNICA substation, Arkansas. 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.