STILL MILL
SubstationUtah · PACIFICORP
STILL MILL is an electric transmission substation in Utah, operated by PACIFICORP. It is classified as high-voltage (345 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 |
|---|---|---|---|---|
| #67294 | 345 kV | PACIFICORP | — | 20.7 mi |
| #67295 | 345 kV | PACIFICORP | — | 14.5 mi |
| #67296 | 345 kV | PACIFICORP | — | 0.3 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of STILL MILL, 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 |
|---|---|---|---|---|---|---|---|
| CAMP WILLIAMS | Substation-Adjacent | UT | Salt Lake County | 345 kV | 600 MW | 1.7 yrs | 76.2 |
| 90TH SOUTH | Substation-Adjacent | UT | Salt Lake County | 345 kV | 600 MW | 1.7 yrs | 75.0 |
| STILL MILL | Substation-Adjacent | UT | Utah County | 345 kV | 600 MW | 1.7 yrs | 74.8 |
| OQUIRRH | Substation-Adjacent | UT | Salt Lake County | 345 kV | 600 MW | 1.7 yrs | 74.1 |
| UNKNOWN201528 | Substation-Adjacent | UT | Salt Lake County | 138 kV | 100 MW | 1.7 yrs | 73.3 |
| UNKNOWN206167 | Substation-Adjacent | UT | Salt Lake County | 275 kV | 300 MW | 1.7 yrs | 72.5 |
| SPANISH FORK | Substation-Adjacent | UT | Utah County | 345 kV | 600 MW | 1.7 yrs | 71.8 |
| MIDVALLEY | Substation-Adjacent | UT | Salt Lake County | 345 kV | 600 MW | 1.7 yrs | 70.4 |
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 STILL MILL substation, Utah. 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.