HILLJE
SubstationTexas · AEP TEXAS CENTRAL COMPANY
At a glance
HILLJE is an electric transmission substation in Texas, on AEP TEXAS CENTRAL COMPANY's transmission network. It is classified as high-voltage (345 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
Ownership
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #303873 | 345 kV | CENTERPOINT ENERGY | IN SERVICE | 49.1 mi |
| #305061 | 345 kV | AEP TEXAS CENTRAL COMPANY | IN SERVICE | 19.6 mi |
| #312953 | 345 kV | AEP TEXAS CENTRAL COMPANY | IN SERVICE | 19.6 mi |
| #313072 | 345 kV | CENTERPOINT ENERGY | IN SERVICE | 49.0 mi |
| #305558 | 138 kV | — | IN SERVICE | 74.7 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of HILLJE, 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 |
|---|---|---|---|---|---|---|---|
| SOTEX5 | Substation-Adjacent | TX | Matagorda County | 345 kV | 600 MW | 3.5 yrs | 63.0 |
| BLESSING | Substation-Adjacent | TX | Matagorda County | 345 kV | 600 MW | 3.5 yrs | 63.0 |
| HILLJE | Substation-Adjacent | TX | Wharton County | 345 kV | 600 MW | 3.5 yrs | 62.1 |
| EC Near Newgulf Cogen | Greenfield | TX | Wharton | — | — | 3.5 yrs | 60.6 |
| EC Near Newgulf Cogen | Greenfield | TX | Wharton | — | — | 3.5 yrs | 60.6 |
| EC Near Newgulf Cogen | Greenfield | TX | Wharton | — | — | 3.5 yrs | 60.3 |
| EC FFE Wharton County | Greenfield | TX | Wharton County | — | — | 3.5 yrs | 60.3 |
| OZ Wharton | Greenfield | TX | Wharton | — | — | 3.5 yrs | 60.2 |
How does HILLJE compare with other substations in Texas?
Texas has 4,939 substation records in HIFLD, of which 1,426 carry a station name; the rest are unnamed tap points, risers and line ends. 198 named substations in the state are in HILLJE's 345–499 kV band (14% of named stations). 2 sit in a higher band. 200 named substations in Texas operate at 345 kV or above. The highest voltage recorded in the state is 500 kV, and the state median is 138 kV.
Who owns the transmission lines at HILLJE?
The 5 connected lines listed above are owned by CENTERPOINT ENERGY, AEP TEXAS CENTRAL COMPANY. Line voltages range from 138 kV to 345 kV. Their combined recorded length is about 211.9 miles.
How do candidate sites near HILLJE score?
The 8 highest-scoring candidate sites within about 25 miles range from 60 to 63 on the 0–100 DC Readiness scale. They fall in Matagorda County, Wharton County, Wharton. The Texas average across 6,839 scored sites is 56.4. 3,635 of those Texas sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
What voltage is HILLJE substation?
HILLJE has a maximum voltage of 345 kV and a minimum of 69 kV. That places it in the 345–499 kV band. The median named US substation in this dataset is 115 kV, so HILLJE is above the national midpoint.
How many transmission lines connect to HILLJE substation?
5 transmission lines terminate at or pass through HILLJE in the HIFLD line data. The connected lines listed here run at 345 kV, 138 kV. Together the listed lines cover about 211.9 miles.
Who owns HILLJE substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at HILLJE belong to AEP TEXAS CENTRAL COMPANY, and others to CENTERPOINT ENERGY. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is HILLJE substation located?
HILLJE is in Texas at 29.0295, -96.2360. The datacenter candidate sites closest to it are in Matagorda County, Wharton County, Wharton.
Are there datacenter candidate sites near HILLJE substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of HILLJE. The highest-scoring is SOTEX5 at 63/100. Across Texas, the average DC Readiness score is 56.4.
Other 345 kV substations in Texas
- GREENS BAYOU 345· 21 lines
- ROYSE· 17 lines
- CEDAR BAYOU PLANT· 16 lines
- PH ROBINSON· 16 lines
- VENUS· 16 lines
- SKYLINE· 15 lines
- SOTEX5· 15 lines
- PARISH· 14 lines
- All named substations in Texas· 1,426 stations
- Datacenter candidate sites in Texas· 6,839 sites
- Brownfield and retired plant sites in Texas
- 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, “HILLJE substation, Texas”, https://gridcensus.com/substations/texas/hillje-d55ec237 (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 HILLJE substation, Texas 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.