BIG CLIFF
SubstationOregon · BONNEVILLE POWER ADMINISTRATION
BIG CLIFF is an electric transmission substation in Oregon, operated by BONNEVILLE POWER ADMINISTRATION. It is classified as high-voltage (230 kv) and connects 1 transmission line. 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 |
|---|---|---|---|---|
| #73315 | 230 kV | BONNEVILLE POWER ADMINISTRATION | — | 2.8 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of BIG CLIFF, 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 |
|---|---|---|---|---|---|---|---|
| SANTIAM | Substation-Adjacent | OR | Marion County | 500 kV | 1,000 MW | 1.7 yrs | 72.2 |
| Greenfield (MARION - ASHE) | Greenfield | OR | Marion County | 500 kV | 1,000 MW | 1.7 yrs | 66.9 |
| Greenfield (JOHN DAY 2 - MARION) | Greenfield | OR | Marion County | 500 kV | 1,000 MW | 1.7 yrs | 66.4 |
| MOLALLA | Substation-Adjacent | OR | Marion County | 115 kV | 100 MW | 1.7 yrs | 65.9 |
| Greenfield (MARION - ASHE) | Greenfield | OR | Marion County | 500 kV | 1,000 MW | 1.7 yrs | 65.7 |
| TAP203156 | Substation-Adjacent | OR | Marion County | 230 kV | 300 MW | 1.7 yrs | 65.7 |
| NEW LYONS | Substation-Adjacent | OR | Marion County | 115 kV | 100 MW | 1.7 yrs | 64.9 |
| Greenfield (JOHN DAY 2 - MARION) | Greenfield | OR | Marion County | 500 kV | 1,000 MW | 1.7 yrs | 64.6 |
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 BIG CLIFF 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.