COSO 8-9
SubstationNevada · AZUSA LIGHT & POWER
COSO 8-9 is an electric transmission substation in Nevada, operated by AZUSA LIGHT & POWER. It is classified as sub-transmission (115 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 |
|---|---|---|---|---|
| #80649 | 115 kV | AZUSA LIGHT & POWER | IN SERVICE | 1.5 mi |
| #87185 | 115 kV | AZUSA LIGHT & POWER | IN SERVICE | 1.3 mi |
| #91261 | 115 kV | AZUSA LIGHT & POWER | — | 0.1 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of COSO 8-9, 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 |
|---|---|---|---|---|---|---|---|
| Greenfield (CELILO - SYLMAR EAST) | Greenfield | CA | Tulare County | 1000 kV | 1,000 MW | 5.8 yrs | 55.8 |
| DOWNS | Substation-Adjacent | CA | Kern County | 115 kV | 100 MW | 5.8 yrs | 55.7 |
| COSO 7 | Substation-Adjacent | CA | Inyo County | 230 kV | 300 MW | 5.8 yrs | 55.3 |
| Greenfield (CELILO - SYLMAR EAST) | Greenfield | CA | Inyo County | 1000 kV | 1,000 MW | 5.8 yrs | 55.1 |
| SEARLES | Substation-Adjacent | CA | Inyo County | 115 kV | 100 MW | 5.8 yrs | 54.8 |
| Greenfield (CELILO - SYLMAR EAST) | Greenfield | CA | Inyo County | 1000 kV | 1,000 MW | 5.8 yrs | 54.7 |
| Greenfield (CELILO - SYLMAR EAST) | Greenfield | CA | Kern County | 1000 kV | 1,000 MW | 5.8 yrs | 54.6 |
| Greenfield (CELILO - SYLMAR EAST) | Greenfield | CA | Inyo County | 1000 kV | 1,000 MW | 5.8 yrs | 54.5 |
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 COSO 8-9 substation, Nevada. 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.