MCADAMS
SubstationArkansas · ENTERGY MISSISSIPPI INC
MCADAMS is an electric transmission substation in Arkansas, operated by ENTERGY MISSISSIPPI INC. It is classified as extra-high-voltage (500 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 |
|---|---|---|---|---|
| #18647 | 500 kV | ENTERGY MISSISSIPPI INC | IN SERVICE | 24.4 mi |
| #19389 | 500 kV | ENTERGY MISSISSIPPI INC | IN SERVICE | 0.4 mi |
| #24082 | 500 kV | ENTERGY MISSISSIPPI INC | IN SERVICE | 57.8 mi |
| #22703 | 230 kV | ENTERGY MISSISSIPPI INC | IN SERVICE | 67.9 mi |
| #35036 | 230 kV | ENTERGY MISSISSIPPI INC | IN SERVICE | 16.4 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of MCADAMS, 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 |
|---|---|---|---|---|---|---|---|
| FRENCH CAMP | Substation-Adjacent | MS | Choctaw County | 500 kV | 1,000 MW | 1.4 yrs | 76.4 |
| WOLF CREEK | Substation-Adjacent | MS | Choctaw County | 500 kV | 1,000 MW | 1.4 yrs | 73.4 |
| ATTALA | Substation-Adjacent | MS | Attala County | 500 kV | 1,000 MW | 1.4 yrs | 70.9 |
| Greenfield (MCADAMS - LAKEOVER) | Greenfield | MS | Madison County | 500 kV | 1,000 MW | 1.4 yrs | 70.3 |
| MCADAMS | Substation-Adjacent | MS | Attala County | 500 kV | 1,000 MW | 1.4 yrs | 69.5 |
| Greenfield (MCADAMS - LAKEOVER) | Greenfield | MS | Madison County | 500 kV | 1,000 MW | 1.4 yrs | 68.9 |
| Greenfield (MCADAMS - LAKEOVER) | Greenfield | MS | Madison County | 500 kV | 1,000 MW | 1.4 yrs | 67.1 |
| Greenfield (WOLF CREEK - MCADAMS) | Greenfield | MS | Attala County | 500 kV | 1,000 MW | 1.4 yrs | 65.9 |
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 MCADAMS 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.