ZION HILL
SubstationArkansas · ENTERGY ARKANSAS INC
At a glance
ZION HILL is an electric transmission substation in Arkansas, on ENTERGY ARKANSAS INC'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
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #120925 | — | ENTERGY ARKANSAS INC | IN SERVICE | 6.4 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of ZION HILL, 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 |
|---|---|---|---|---|---|---|---|
| MABELVALE SUBSTATION | Substation-Adjacent | AR | Pulaski County | 500 kV | 1,000 MW | 4.3 yrs | 68.6 |
| MAYFLOWER | Substation-Adjacent | AR | Pulaski County | 500 kV | 1,000 MW | 4.3 yrs | 67.5 |
| WRIGHTSVILLE | Substation-Adjacent | AR | Pulaski County | 500 kV | 1,000 MW | 4.3 yrs | 67.5 |
| KEO SUBSTATION | Substation-Adjacent | AR | Lonoke County | 500 kV | 1,000 MW | 4.3 yrs | 67.2 |
| UNKNOWN117348 | Substation-Adjacent | AR | Lonoke County | 500 kV | 1,000 MW | 4.3 yrs | 65.6 |
| OZ Pulaski | Greenfield | AR | Pulaski | — | — | 4.3 yrs | 64.5 |
| EC Near Cecil Lynch | Greenfield | AR | Pulaski | — | — | 4.3 yrs | 62.4 |
| Greenfield (MABELVALE SUBSTATION - MAYFLOW) | Greenfield | AR | Saline County | 500 kV | 1,000 MW | 4.3 yrs | 61.6 |
Who owns the transmission lines at ZION HILL?
The 1 connected line listed above is owned by ENTERGY ARKANSAS INC. Their combined recorded length is about 6.4 miles.
How do candidate sites near ZION HILL score?
The 8 highest-scoring candidate sites within about 25 miles range from 62 to 69 on the 0–100 DC Readiness scale. They fall in Pulaski County, Lonoke County, Pulaski, Saline County. The Arkansas average across 1,651 scored sites is 53.6. 758 of those Arkansas sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
How many transmission lines connect to ZION HILL substation?
1 transmission line terminate at or pass through ZION HILL in the HIFLD line data. Together the listed lines cover about 6.4 miles.
Who owns ZION HILL substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at ZION HILL belong to ENTERGY ARKANSAS INC. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is ZION HILL substation located?
ZION HILL is in Arkansas at 34.9740, -92.1396. The datacenter candidate sites closest to it are in Pulaski County, Lonoke County, Pulaski.
Are there datacenter candidate sites near ZION HILL substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of ZION HILL. The highest-scoring is MABELVALE SUBSTATION at 69/100. Across Arkansas, the average DC Readiness score is 53.6.
More in Arkansas
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, “ZION HILL substation, Arkansas”, https://gridcensus.com/substations/arkansas/zion-hill-407b2ca4 (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 ZION HILL substation, Arkansas 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.