TAP305222
SubstationCalifornia · SAN DIEGO GAS & ELECTRIC
At a glance
TAP305222 is an electric transmission substation in California, operated by SAN DIEGO GAS & ELECTRIC. 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 |
|---|---|---|---|---|
| #306035 | 138 kV | SAN DIEGO GAS & ELECTRIC | IN SERVICE | 0.3 mi |
| #307809 | 138 kV | SAN DIEGO GAS & ELECTRIC | IN SERVICE | 3.5 mi |
| #311181 | 138 kV | SAN DIEGO GAS & ELECTRIC | IN SERVICE | 2.7 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP305222, 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 |
|---|---|---|---|---|---|---|---|
| HUNTINGTON BEACH | Substation-Adjacent | CA | Orange County | 230 kV | 300 MW | 7.6 yrs | 61.0 |
| SERRANO | Substation-Adjacent | CA | Orange County | 500 kV | 1,000 MW | 7.6 yrs | 60.8 |
| Anaheim GT | Brownfield | CA | Orange County | 66 kV | 49 MW | 7.6 yrs | 59.0 |
| SAN ONOFRE | Substation-Adjacent | CA | Orange County | 230 kV | 300 MW | 7.6 yrs | 58.4 |
| JOHANNA | Substation-Adjacent | CA | Orange County | 230 kV | 300 MW | 7.6 yrs | 58.0 |
| BARRE | Substation-Adjacent | CA | Orange County | 230 kV | 300 MW | 7.6 yrs | 57.8 |
| SANTIAGO | Substation-Adjacent | CA | Orange County | 230 kV | 300 MW | 7.6 yrs | 56.8 |
| ENCINA | Substation-Adjacent | CA | San Diego County | 230 kV | 300 MW | 7.6 yrs | 56.8 |
Who owns the transmission lines at TAP305222?
The 3 connected lines listed above are owned by SAN DIEGO GAS & ELECTRIC. Line voltages range from 138 kV to 138 kV. Their combined recorded length is about 6.4 miles.
How do candidate sites near TAP305222 score?
The 8 highest-scoring candidate sites within about 25 miles range from 57 to 61 on the 0–100 DC Readiness scale. They fall in Orange County, San Diego 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 TAP305222 substation?
TAP305222 has a maximum voltage of 138 kV. That places it in the 115–229 kV band. The median named US substation in this dataset is 115 kV, so TAP305222 is above the national midpoint.
How many transmission lines connect to TAP305222 substation?
3 transmission lines terminate at or pass through TAP305222 in the HIFLD line data. The connected lines listed here run at 138 kV. Together the listed lines cover about 6.4 miles.
Who owns TAP305222 substation?
HIFLD lists SAN DIEGO GAS & ELECTRIC as the operator of TAP305222.
Where is TAP305222 substation located?
TAP305222 is in California at 33.5141, -117.6686. The datacenter candidate sites closest to it are in Orange County, San Diego County.
Are there datacenter candidate sites near TAP305222 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP305222. The highest-scoring is HUNTINGTON BEACH at 61/100. Across California, the average DC Readiness score is 45.4.
More in California
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, “TAP305222 substation, California”, https://gridcensus.com/substations/california/tap305222-ea2f5bc5 (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 TAP305222 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.