UNION VALLEY
SubstationCalifornia · PACIFIC GAS & ELECTRIC COMPANY
UNION VALLEY is an electric transmission substation in California, operated by PACIFIC GAS & ELECTRIC COMPANY. It is classified as high-voltage (230 kv) and connects 5 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 |
|---|---|---|---|---|
| #84972 | 230 kV | PACIFIC GAS & ELECTRIC COMPANY | IN SERVICE | 11.8 mi |
| #86605 | 230 kV | PACIFIC GAS & ELECTRIC COMPANY | IN SERVICE | 12.3 mi |
| #87812 | 230 kV | PACIFIC GAS & ELECTRIC COMPANY | IN SERVICE | 6.8 mi |
| #87960 | 230 kV | PACIFIC GAS & ELECTRIC COMPANY | IN SERVICE | 3.7 mi |
| #91895 | 230 kV | PACIFIC GAS & ELECTRIC COMPANY | IN SERVICE | 5.7 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of UNION VALLEY, 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 |
|---|---|---|---|---|---|---|---|
| JONES FORK | Substation-Adjacent | CA | El Dorado County | 230 kV | 300 MW | 5.7 yrs | 54.6 |
| RALSTON | Substation-Adjacent | CA | Placer County | 230 kV | 300 MW | 5.7 yrs | 54.2 |
| UNION VALLEY | Substation-Adjacent | CA | El Dorado County | 230 kV | 300 MW | 5.7 yrs | 54.1 |
| ROBBS PEAK | Substation-Adjacent | CA | El Dorado County | 230 kV | 300 MW | 5.7 yrs | 53.6 |
| UNKNOWN307690 | Substation-Adjacent | CA | El Dorado County | 115 kV | 100 MW | 5.7 yrs | 53.6 |
| PLACERVILLE | Substation-Adjacent | CA | El Dorado County | 115 kV | 100 MW | 5.7 yrs | 53.0 |
| JAYBIRD | Substation-Adjacent | CA | El Dorado County | 230 kV | 300 MW | 5.7 yrs | 52.3 |
| LOON LAKE | Substation-Adjacent | CA | El Dorado County | 230 kV | 300 MW | 5.7 yrs | 51.5 |
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 UNION VALLEY 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.