SUGARLOAF
SubstationArizona · ARIZONA PUBLIC SERVICE COMPANY
SUGARLOAF is an electric transmission substation in Arizona, operated by ARIZONA PUBLIC SERVICE COMPANY. It is classified as extra-high-voltage (500 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 |
|---|---|---|---|---|
| #82110 | 500 kV | ARIZONA PUBLIC SERVICE COMPANY | IN SERVICE | 24.0 mi |
| #91678 | 500 kV | — | IN SERVICE | 49.8 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of SUGARLOAF, 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 |
|---|---|---|---|---|---|---|---|
| CHOLLA | Substation-Adjacent | AZ | Navajo County | 500 kV | 1,000 MW | 5.7 yrs | 68.4 |
| SUGARLOAF | Substation-Adjacent | AZ | Navajo County | 500 kV | 1,000 MW | 5.7 yrs | 66.5 |
| UNKNOWN300020 | Substation-Adjacent | AZ | Navajo County | 345 kV | 600 MW | 3.5 yrs | 64.7 |
| Greenfield (FOUR CORNERS - UNKNOWN307401) | Greenfield | AZ | Navajo County | 345 kV | 600 MW | 3.5 yrs | 59.9 |
| Greenfield (SUGARLOAF - CHOLLA) | Greenfield | AZ | Navajo County | 500 kV | 1,000 MW | 5.7 yrs | 59.0 |
| Greenfield (SILVER KING - CORONADO) | Greenfield | AZ | Navajo County | 500 kV | 1,000 MW | 5.7 yrs | 58.9 |
| Greenfield (SILVER KING - CORONADO) | Greenfield | AZ | Navajo County | 500 kV | 1,000 MW | 5.7 yrs | 57.9 |
| Greenfield (PINAL CENTRAL - CHOLLA) | Greenfield | AZ | Navajo County | 500 kV | 1,000 MW | 5.7 yrs | 57.8 |
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 SUGARLOAF 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.