SONOMA
SubstationCalifornia · PACIFIC GAS & ELECTRIC COMPANY
SONOMA is an electric transmission substation in California, operated by PACIFIC GAS & ELECTRIC COMPANY. It is classified as sub-transmission (115 kv) and connects 2 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 & operation
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #83228 | 115 kV | PACIFIC GAS & ELECTRIC COMPANY | IN SERVICE | 7.2 mi |
| #92927 | 115 kV | PACIFIC GAS & ELECTRIC COMPANY | IN SERVICE | 12.5 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of SONOMA, 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 |
|---|---|---|---|---|---|---|---|
| LAKEVILLE | Substation-Adjacent | CA | Marin County | 230 kV | 300 MW | 5.7 yrs | 61.6 |
| BAHIA | Substation-Adjacent | CA | Contra Costa County | 230 kV | 300 MW | 5.7 yrs | 60.4 |
| PARKWAY | Substation-Adjacent | CA | Solano County | 230 kV | 300 MW | 5.7 yrs | 60.1 |
| DEADEND310155 | Substation-Adjacent | CA | Solano County | 230 kV | 300 MW | 5.7 yrs | 58.6 |
| CARQUINEZ | Substation-Adjacent | CA | Contra Costa County | 115 kV | 100 MW | 5.7 yrs | 58.3 |
| IGNACIO | Substation-Adjacent | CA | Marin County | 230 kV | 300 MW | 5.7 yrs | 58.3 |
| Richmond Cogen | Brownfield | CA | Marin | — | 43 MW | — | 58.3 |
| SONOMA | Substation-Adjacent | CA | Napa County | 115 kV | 100 MW | 5.7 yrs | 57.7 |
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
This page shows a public slice of the GridCensus dataset for SONOMA substation, California. Pro and Enterprise plans unlock the full 164,098-site catalog, raw sub-scores, parcel ownership, interconnection-queue detail, saved searches, and programmatic API access.