KNOB
SubstationArizona · IMPERIAL IRRIGATION DISTRICT
KNOB is an electric transmission substation in Arizona, operated by IMPERIAL IRRIGATION DISTRICT. It is classified as high-voltage (230 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 |
|---|---|---|---|---|
| #84245 | 230 kV | IMPERIAL IRRIGATION DISTRICT | IN SERVICE | 21.7 mi |
| #91459 | 161 kV | — | IN SERVICE | 20.3 mi |
| #92836 | 161 kV | IMPERIAL IRRIGATION DISTRICT | IN SERVICE | 3.2 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of KNOB, 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 |
|---|---|---|---|---|---|---|---|
| NORTH GILA | Substation-Adjacent | AZ | Yuma County | 500 kV | 1,000 MW | 5.7 yrs | 62.0 |
| GILA | Substation-Adjacent | AZ | Yuma County | 161 kV | 100 MW | 5.7 yrs | 61.5 |
| Greenfield (NORTH GILA - IMPERIAL VALLEY) | Greenfield | AZ | Yuma County | 500 kV | 1,000 MW | 5.7 yrs | 59.9 |
| Greenfield (HOODOO WASH - NORTH GILA) | Greenfield | AZ | Yuma County | 500 kV | 1,000 MW | 5.7 yrs | 59.8 |
| Greenfield (HOODOO WASH - NORTH GILA) | Greenfield | AZ | Yuma County | 500 kV | 1,000 MW | 5.7 yrs | 56.6 |
| Greenfield (NORTH GILA - IMPERIAL VALLEY) | Greenfield | CA | Imperial County | 500 kV | 1,000 MW | 5.7 yrs | 56.5 |
| KNOB | Substation-Adjacent | CA | Imperial County | 230 kV | 300 MW | 5.7 yrs | 56.1 |
| Greenfield (NORTH GILA - IMPERIAL VALLEY) | Greenfield | CA | Imperial County | 500 kV | 1,000 MW | 5.7 yrs | 55.9 |
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 KNOB substation, Arizona. 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.