FREEPORT
SubstationTexas · CENTERPOINT ENERGY HOUSTON ELECTRIC, LLC
At a glance
FREEPORT is an electric transmission substation in Texas, on CENTERPOINT ENERGY HOUSTON ELECTRIC, LLC's transmission network. It is classified as distribution (69–115 kv) and connects 4 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 |
|---|---|---|---|---|
| #301905 | 69 kV | CENTERPOINT ENERGY HOUSTON ELECTRIC, LLC | IN SERVICE | 4.0 mi |
| #303581 | 69 kV | CENTERPOINT ENERGY HOUSTON ELECTRIC, LLC | IN SERVICE | 4.5 mi |
| #304726 | 69 kV | CENTERPOINT ENERGY HOUSTON ELECTRIC, LLC | — | 2.1 mi |
| #309050 | 69 kV | CENTERPOINT ENERGY HOUSTON ELECTRIC, LLC | IN SERVICE | 2.3 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of FREEPORT, 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 Energy | Brownfield | TX | Brazoria County | 138 kV | 776 MW | 3.5 yrs | 69.9 |
| DOW VELASCO | Substation-Adjacent | TX | Brazoria County | 345 kV | 600 MW | 3.5 yrs | 64.3 |
| CAVERN | Substation-Adjacent | TX | Brazoria County | 345 kV | 600 MW | 3.5 yrs | 64.2 |
| UNKNOWN307821 | Substation-Adjacent | TX | Brazoria County | 345 kV | 600 MW | 3.5 yrs | 64.1 |
| Ascend Performance Materials Texas Inc. | Brownfield | TX | Brazoria | 138 kV | 3 MW | 3.5 yrs | 62.4 |
| EC Near Ascend Performance Materials Texas Inc. | Greenfield | TX | Brazoria | — | — | 3.5 yrs | 61.1 |
| EC Near Freeport Energy Center | Greenfield | TX | Brazoria | — | — | 3.5 yrs | 60.4 |
| EC Near Freeport Energy Center | Greenfield | TX | Brazoria | — | — | 3.5 yrs | 60.0 |
How does FREEPORT 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. 165 named substations in the state are in FREEPORT's 69–114 kV band (12% of named stations). 1,256 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 FREEPORT?
The 4 connected lines listed above are owned by CENTERPOINT ENERGY HOUSTON ELECTRIC, LLC. Line voltages range from 69 kV to 69 kV. Their combined recorded length is about 13 miles.
How do candidate sites near FREEPORT score?
The 8 highest-scoring candidate sites within about 25 miles range from 60 to 70 on the 0–100 DC Readiness scale. They fall in Brazoria County, Brazoria. 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 FREEPORT substation?
FREEPORT has a maximum voltage of 69 kV. That places it in the 69–114 kV band. The median named US substation in this dataset is 115 kV, so FREEPORT is below the national midpoint.
How many transmission lines connect to FREEPORT substation?
4 transmission lines terminate at or pass through FREEPORT in the HIFLD line data. The connected lines listed here run at 69 kV. Together the listed lines cover about 13 miles.
Who owns FREEPORT substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at FREEPORT belong to CENTERPOINT ENERGY HOUSTON ELECTRIC, LLC. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is FREEPORT substation located?
FREEPORT is in Texas at 28.9402, -95.3485. The datacenter candidate sites closest to it are in Brazoria County, Brazoria.
Are there datacenter candidate sites near FREEPORT substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of FREEPORT. The highest-scoring is Freeport Energy at 70/100. Across Texas, the average DC Readiness score is 56.4.
Other 69 kV substations in Texas
- GREENS BAYOU 69· 9 lines
- ELGIN SWITCHING· 6 lines
- TAYLOR· 5 lines
- DEVINE· 4 lines
- DEVINE· 4 lines
- FISH CREEK 69· 4 lines
- LEACH· 4 lines
- MCKINNEY· 4 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, “FREEPORT substation, Texas”, https://gridcensus.com/substations/texas/freeport-eb9cba4b (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 FREEPORT 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.