MILLER
SubstationMississippi · ENTERGY MISSISSIPPI INC
At a glance
MILLER is an electric transmission substation in Mississippi, on ENTERGY MISSISSIPPI INC's transmission network. It is classified as sub-transmission (138 kv) and connects 3 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 |
|---|---|---|---|---|
| #103860 | 161 kV | ENTERGY MISSISSIPPI INC | IN SERVICE | 4.1 mi |
| #120304 | 161 kV | ENTERGY MISSISSIPPI INC | IN SERVICE | 1.1 mi |
| #137619 | 161 kV | ENTERGY MISSISSIPPI INC | IN SERVICE | 9.5 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of MILLER, 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 | TN | DeSoto County | 500 kV | 1,000 MW | 3.9 yrs | 71.8 |
| CORDOVA | Substation-Adjacent | TN | Shelby County | 500 kV | 1,000 MW | 3.9 yrs | 71.2 |
| HORN LAKE | Substation-Adjacent | MS | DeSoto County | 230 kV | 300 MW | 4.3 yrs | 66.0 |
| UNKNOWN110942 | Substation-Adjacent | MS | DeSoto County | 230 kV | 300 MW | 4.3 yrs | 66.0 |
| OZ Shelby | Greenfield | TN | Shelby | — | — | 3.9 yrs | 66.0 |
| Greenfield (CORDOVA - AURORA) | Greenfield | FL | Fayette County | 500 kV | 1,000 MW | 3.7 yrs | 65.9 |
| EC Near Allen | Greenfield | TN | Shelby | — | — | 3.9 yrs | 65.2 |
| OZ Shelby | Greenfield | TN | Shelby | — | — | 3.9 yrs | 65.1 |
How does MILLER compare with other substations in Mississippi?
Mississippi has 1,204 substation records in HIFLD, of which 163 carry a station name; the rest are unnamed tap points, risers and line ends. 109 named substations in the state are in MILLER's 115–229 kV band (67% of named stations). 42 sit in a higher band. 18 named substations in Mississippi operate at 345 kV or above. The highest voltage recorded in the state is 500 kV, and the state median is 161 kV.
Who owns the transmission lines at MILLER?
The 3 connected lines listed above are owned by ENTERGY MISSISSIPPI INC. Line voltages range from 161 kV to 161 kV. Their combined recorded length is about 14.6 miles.
How do candidate sites near MILLER score?
The 8 highest-scoring candidate sites within about 25 miles range from 65 to 72 on the 0–100 DC Readiness scale. They fall in DeSoto County, Shelby County, Shelby, Fayette County. The Mississippi average across 3,104 scored sites is 53. 694 of those Mississippi sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
What voltage is MILLER substation?
MILLER has a maximum voltage of 161 kV. That places it in the 115–229 kV band. The median named US substation in this dataset is 115 kV, so MILLER is above the national midpoint.
How many transmission lines connect to MILLER substation?
3 transmission lines terminate at or pass through MILLER in the HIFLD line data. The connected lines listed here run at 161 kV. Together the listed lines cover about 14.6 miles.
Who owns MILLER substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at MILLER belong to ENTERGY MISSISSIPPI INC. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is MILLER substation located?
MILLER is in Mississippi at 34.9488, -89.7404. The datacenter candidate sites closest to it are in DeSoto County, Shelby County, Shelby.
Are there datacenter candidate sites near MILLER substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of MILLER. The highest-scoring is FREEPORT at 72/100. Across Mississippi, the average DC Readiness score is 53.
Other 161 kV substations in Mississippi
- TUPELO· 10 lines
- STURGIS· 7 lines
- DE KALB· 6 lines
- PHILADELPHIA· 6 lines
- STATELINE· 6 lines
- BOONEVILLE· 5 lines
- LEAKE· 5 lines
- NEW ALBANY· 5 lines
- All named substations in Mississippi· 163 stations
- Datacenter candidate sites in Mississippi· 3,104 sites
- Brownfield and retired plant sites in Mississippi
- Substations by state
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, “MILLER substation, Mississippi”, https://gridcensus.com/substations/mississippi/miller-b7e1707e (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 MILLER substation, Mississippi 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.