ROUND BUTTE
SubstationOregon · PORTLAND GENERAL ELECTRIC CO
ROUND BUTTE is an electric transmission substation in Oregon, operated by PORTLAND GENERAL ELECTRIC CO. It is classified as extra-high-voltage (500 kv) and connects 7 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 |
|---|---|---|---|---|
| #67155 | 500 kV | PORTLAND GENERAL ELECTRIC CO | IN SERVICE | 15.6 mi |
| #67378 | 230 kV | PORTLAND GENERAL ELECTRIC CO | — | 23.9 mi |
| #67379 | 230 kV | PORTLAND GENERAL ELECTRIC CO | — | 8.0 mi |
| #67380 | 230 kV | PORTLAND GENERAL ELECTRIC CO | — | 98.6 mi |
| #73241 | 230 kV | PORTLAND GENERAL ELECTRIC CO | — | 0.6 mi |
| #73242 | 230 kV | PORTLAND GENERAL ELECTRIC CO | — | 0.6 mi |
| #73243 | 230 kV | PORTLAND GENERAL ELECTRIC CO | — | 0.6 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of ROUND BUTTE, 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 |
|---|---|---|---|---|---|---|---|
| REDMOND | Substation-Adjacent | OR | Deschutes County | 230 kV | 300 MW | 1.7 yrs | 71.4 |
| ROUND BUTTE | Substation-Adjacent | OR | Jefferson County | 500 kV | 1,000 MW | 1.7 yrs | 70.2 |
| PONDEROSA | Substation-Adjacent | OR | Deschutes County | 500 kV | 1,000 MW | 1.7 yrs | 69.3 |
| GRIZZLY | Substation-Adjacent | OR | Jefferson County | 500 kV | 1,000 MW | 1.7 yrs | 68.4 |
| Greenfield (GRIZZLY - BUCKLEY) | Greenfield | OR | Jefferson County | 500 kV | 1,000 MW | 1.7 yrs | 67.9 |
| Greenfield (JOHN DAY 2 - GRIZZLY) | Greenfield | OR | Jefferson County | 500 kV | 1,000 MW | 1.7 yrs | 67.8 |
| Greenfield (CELILO - SYLMAR EAST) | Greenfield | OR | Jefferson County | 1000 kV | 1,000 MW | 5.8 yrs | 67.7 |
| Greenfield (PONDEROSA - GRIZZLY) | Greenfield | OR | Jefferson County | 500 kV | 1,000 MW | 1.7 yrs | 67.6 |
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.
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This page shows a public slice of the GridCensus dataset for ROUND BUTTE 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.