TELEGRAPH CANYON
SubstationCalifornia · SAN DIEGO GAS & ELECTRIC
TELEGRAPH CANYON is an electric transmission substation in California, operated by SAN DIEGO GAS & ELECTRIC. It is classified as sub-transmission (138 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
Connected transmission lines
Lines terminating at or passing through this substation, by HIFLD line ID, highest voltage first.
| Line ID | Voltage | Owner | Status | Length |
|---|---|---|---|---|
| #89154 | 138 kV | SAN DIEGO GAS & ELECTRIC | IN SERVICE | 6.6 mi |
| #92513 | 138 kV | SAN DIEGO GAS & ELECTRIC | IN SERVICE | 2.6 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of TELEGRAPH CANYON, 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 |
|---|---|---|---|---|---|---|---|
| MIGUEL | Substation-Adjacent | CA | San Diego County | 500 kV | 1,000 MW | 5.7 yrs | 66.3 |
| OLD TOWN | Substation-Adjacent | CA | San Diego County | 230 kV | 300 MW | 5.7 yrs | 64.0 |
| SUNCREST | Substation-Adjacent | CA | San Diego County | 500 kV | 1,000 MW | 5.7 yrs | 63.4 |
| PENASQUITOS | Substation-Adjacent | CA | San Diego County | 230 kV | 300 MW | 5.7 yrs | 63.4 |
| LOS COCHES | Substation-Adjacent | CA | San Diego County | 230 kV | 300 MW | 5.7 yrs | 62.0 |
| OTAY MESA | Substation-Adjacent | CA | San Diego County | 230 kV | 300 MW | 5.7 yrs | 60.7 |
| SYCAMORE CANYON | Substation-Adjacent | CA | San Diego County | 230 kV | 300 MW | 5.7 yrs | 60.5 |
| CHICARITA | Substation-Adjacent | CA | San Diego County | 138 kV | 100 MW | 5.7 yrs | 59.7 |
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 TELEGRAPH CANYON 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.