LONGHOUSE VALLEY
SubstationArizona · NAVAJO TRIBAL UTILITY AUTHORITY
LONGHOUSE VALLEY is an electric transmission substation in Arizona, operated by NAVAJO TRIBAL UTILITY AUTHORITY. It is classified as high-voltage (230 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 |
|---|---|---|---|---|
| #83722 | 230 kV | NAVAJO TRIBAL UTILITY AUTHORITY | IN SERVICE | 19.9 mi |
| #91594 | 230 kV | NAVAJO TRIBAL UTILITY AUTHORITY | IN SERVICE | 56.9 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of LONGHOUSE 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 |
|---|---|---|---|---|---|---|---|
| KAYENTA | Substation-Adjacent | UT | San Juan County | 230 kV | 300 MW | 3.5 yrs | 65.8 |
| LONGHOUSE VALLEY | Substation-Adjacent | UT | San Juan County | 230 kV | 300 MW | 5.7 yrs | 62.6 |
| Greenfield (SHIPROCK - KAYENTA) | Greenfield | UT | San Juan County | 230 kV | 300 MW | 3.5 yrs | 60.0 |
| Greenfield (LONGHOUSE VALLEY - NAVAJO) | Greenfield | UT | Kane County | 230 kV | 300 MW | 5.7 yrs | 58.4 |
| Greenfield (KAYENTA - LONGHOUSE VALLEY) | Greenfield | UT | San Juan County | 230 kV | 300 MW | 5.7 yrs | 58.2 |
| Greenfield (LONGHOUSE VALLEY - NAVAJO) | Greenfield | UT | Kane County | 230 kV | 300 MW | 5.7 yrs | 57.4 |
| Greenfield (KAYENTA - LONGHOUSE VALLEY) | Greenfield | UT | San Juan County | 230 kV | 300 MW | 5.7 yrs | 57.3 |
| Greenfield (LONGHOUSE VALLEY - NAVAJO) | Greenfield | UT | Kane County | 230 kV | 300 MW | 5.7 yrs | 55.0 |
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 LONGHOUSE VALLEY 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.