TAP305242
SubstationCalifornia · PACIFIC GAS & ELECTRIC COMPANY
At a glance
TAP305242 is an electric transmission substation in California, on PACIFIC GAS & ELECTRIC COMPANY's transmission network. It is classified as high-voltage (230 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
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #301564 | 230 kV | PACIFIC GAS & ELECTRIC COMPANY | IN SERVICE | 19.0 mi |
| #308205 | 230 kV | PACIFIC GAS & ELECTRIC COMPANY | IN SERVICE | 1.1 mi |
| #309409 | 230 kV | PACIFIC GAS & ELECTRIC COMPANY | IN SERVICE | 39.7 mi |
| #311704 | 230 kV | PACIFIC GAS & ELECTRIC COMPANY | IN SERVICE | 1.7 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TAP305242, 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 |
|---|---|---|---|---|---|---|---|
| OAKMONT SOUTH | Substation-Adjacent | CA | Napa County | 230 kV | 300 MW | 7.6 yrs | 55.0 |
| OAKMONT NORTH | Substation-Adjacent | CA | Napa County | 230 kV | 300 MW | 7.6 yrs | 54.9 |
| FULTON | Substation-Adjacent | CA | Sonoma County | 230 kV | 300 MW | 7.6 yrs | 54.3 |
| SOCRATES 19 | Substation-Adjacent | CA | Sonoma County | 230 kV | 300 MW | 7.6 yrs | 53.3 |
| WEST FORD FLAT | Substation-Adjacent | CA | Sonoma County | 230 kV | 300 MW | 7.6 yrs | 52.9 |
| BEAR CANYON | Substation-Adjacent | CA | Sonoma County | 230 kV | 300 MW | 7.6 yrs | 52.6 |
| BIG GEYSERS | Substation-Adjacent | CA | Sonoma County | 230 kV | 300 MW | 7.6 yrs | 51.9 |
| QUICKSILVER | Substation-Adjacent | CA | Sonoma County | 230 kV | 300 MW | 7.6 yrs | 51.9 |
Who owns the transmission lines at TAP305242?
The 4 connected lines listed above are owned by PACIFIC GAS & ELECTRIC COMPANY. Line voltages range from 230 kV to 230 kV. Their combined recorded length is about 61.6 miles.
How do candidate sites near TAP305242 score?
The 8 highest-scoring candidate sites within about 25 miles range from 52 to 55 on the 0–100 DC Readiness scale. They fall in Napa County, Sonoma 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 TAP305242 substation?
TAP305242 has a maximum voltage of 230 kV. That places it in the 230–344 kV band. The median named US substation in this dataset is 115 kV, so TAP305242 is above the national midpoint.
How many transmission lines connect to TAP305242 substation?
1 transmission line terminate at or pass through TAP305242 in the HIFLD line data. The connected lines listed here run at 230 kV. Together the listed lines cover about 61.6 miles.
Who owns TAP305242 substation?
HIFLD does not publish substation owners directly. Most of the transmission lines that end at TAP305242 belong to PACIFIC GAS & ELECTRIC COMPANY. GridCensus derives this from the line data, so confirm ownership with the utility for anything contractual.
Where is TAP305242 substation located?
TAP305242 is in California at 38.7543, -122.7545. The datacenter candidate sites closest to it are in Napa County, Sonoma County.
Are there datacenter candidate sites near TAP305242 substation?
GridCensus lists at least 8 scored candidate sites within roughly 25 miles of TAP305242. The highest-scoring is OAKMONT SOUTH at 55/100. 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, “TAP305242 substation, California”, https://gridcensus.com/substations/california/tap305242-50577fd7 (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 TAP305242 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.