CASTAIC
SubstationCalifornia
At a glance
CASTAIC is an electric transmission substation in California. It is classified as distribution (<69 kv) 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
Ownership & operation
Operator not catalogued for this substation.
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of CASTAIC, 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 |
|---|---|---|---|---|---|---|---|
| WARNE | Substation-Adjacent | CA | Ventura County | 230 kV | 300 MW | 7.6 yrs | 54.2 |
| WARNE TAP | Substation-Adjacent | CA | Ventura County | 230 kV | 300 MW | 7.6 yrs | 53.9 |
| CASTAIC | Substation-Adjacent | CA | Ventura County | 230 kV | 300 MW | 7.6 yrs | 53.8 |
| BAILEY | Substation-Adjacent | CA | Ventura County | 230 kV | 300 MW | 7.6 yrs | 53.5 |
| UNKNOWN303962 | Substation-Adjacent | CA | Kern County | 230 kV | 300 MW | 7.6 yrs | 52.5 |
| WIND GAP | Substation-Adjacent | CA | Kern County | 230 kV | 300 MW | 7.6 yrs | 52.5 |
| WHEELER | Substation-Adjacent | CA | Kern County | 230 kV | 300 MW | 7.6 yrs | 52.4 |
| WHEELER RIDGE | Substation-Adjacent | CA | Kern County | 230 kV | 300 MW | 7.6 yrs | 52.4 |
How does CASTAIC compare with other substations in California?
California has 4,260 substation records in HIFLD, of which 3,003 carry a station name; the rest are unnamed tap points, risers and line ends. 1,439 named substations in the state are in CASTAIC's below 69 kV band (48% of named stations). 1,504 sit in a higher band. 44 named substations in California operate at 345 kV or above. The highest voltage recorded in the state is 500 kV, and the state median is 69 kV.
How do candidate sites near CASTAIC score?
The 8 highest-scoring candidate sites within about 25 miles range from 52 to 54 on the 0–100 DC Readiness scale. They fall in Ventura County, Kern County. The California average across 8,490 scored sites is 45.4. 1,573 of those California sites are classed as substation sites (candidate locations generated at an existing substation).
Frequently asked questions
What voltage is CASTAIC substation?
CASTAIC has a maximum voltage of 66 kV and a minimum of 70 kV. That places it in the below 69 kV band. The median named US substation in this dataset is 115 kV, so CASTAIC is below the national midpoint.
How many transmission lines connect to CASTAIC substation?
1 transmission line terminate at or pass through CASTAIC in the HIFLD line data.
Where is CASTAIC substation located?
CASTAIC is in California at 34.8806, -118.9010. The datacenter candidate sites closest to it are in Ventura County, Kern County.
Are there datacenter candidate sites near CASTAIC substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of CASTAIC. The highest-scoring is WARNE at 54/100. Across California, the average DC Readiness score is 45.4.
Other 66 kV substations in California
- SATICOY· 7 lines
- BRIGGSMORE· 5 lines
- CAROLINA· 5 lines
- DELSUR· 5 lines
- FEDERALGEN TAP· 5 lines
- GANESHA· 5 lines
- HAMILTON· 5 lines
- JERSEY· 5 lines
- All named substations in California· 3,003 stations
- Datacenter candidate sites in California· 8,490 sites
- Brownfield and retired plant sites in California
- 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, “CASTAIC substation, California”, https://gridcensus.com/substations/california/castaic-52329e25 (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 CASTAIC substation, California 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.