MILL CREEK
SubstationOregon · PACIFICORP
MILL CREEK is an electric transmission substation in Oregon, operated by PACIFICORP. 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 |
|---|---|---|---|---|
| #75659 | 115 kV | PACIFICORP | — | 5.5 mi |
| #75845 | 115 kV | PACIFICORP | — | 3.2 mi |
| #75846 | 115 kV | PACIFICORP | — | 19.4 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of MILL CREEK, 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 |
|---|---|---|---|---|---|---|---|
| UNKNOWN202431 | Substation-Adjacent | OR | Umatilla County | 230 kV | 300 MW | 1.7 yrs | 69.1 |
| Greenfield (TAP203128 - LOWER MONUMENTAL) | Greenfield | WA | Walla Walla County | 500 kV | 1,000 MW | 1.7 yrs | 65.7 |
| UNKNOWN202741 | Substation-Adjacent | OR | Umatilla County | 115 kV | 100 MW | 1.7 yrs | 65.1 |
| UNKNOWN202654 | Substation-Adjacent | OR | Umatilla County | 115 kV | 100 MW | 1.7 yrs | 64.7 |
| WALLA WALLA | Substation-Adjacent | WA | Walla Walla County | 115 kV | 100 MW | 1.7 yrs | 64.6 |
| TAP203433 | Substation-Adjacent | WA | Walla Walla County | 115 kV | 100 MW | 1.7 yrs | 64.2 |
| UNKNOWN202432 | Substation-Adjacent | WA | Walla Walla County | 115 kV | 100 MW | 1.7 yrs | 63.7 |
| TAP205690 | Substation-Adjacent | WA | Walla Walla County | 115 kV | 100 MW | 1.7 yrs | 63.6 |
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 MILL CREEK substation, Oregon. 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.