SOUTHWEST
SubstationWashington · CITY OF TACOMA - (WA)
SOUTHWEST is an electric transmission substation in Washington, operated by CITY OF TACOMA - (WA). It is classified as high-voltage (230 kv) and connects 11 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 |
|---|---|---|---|---|
| #72398 | 230 kV | CITY OF TACOMA - (WA) | — | 6.7 mi |
| #72399 | 230 kV | CITY OF TACOMA - (WA) | — | 6.7 mi |
| #71996 | 115 kV | CITY OF TACOMA - (WA) | — | 2.5 mi |
| #72005 | 115 kV | CITY OF TACOMA - (WA) | — | 2.5 mi |
| #72009 | 115 kV | CITY OF TACOMA - (WA) | — | 1.3 mi |
| #71994 | 115 kV | LAKEVIEW LIGHT & POWER | — | 2.4 mi |
| #72014 | 115 kV | CITY OF TACOMA - (WA) | — | 1.7 mi |
| #72015 | 115 kV | CITY OF TACOMA - (WA) | IN SERVICE | 7.2 mi |
| #72016 | 115 kV | CITY OF TACOMA - (WA) | — | 1.4 mi |
| #72013 | 115 kV | CITY OF TACOMA - (WA) | — | 7.0 mi |
| #71995 | 115 kV | PUGET SOUND ENERGY INC | — | 5.7 mi |
Nearby datacenter candidate sites
Scored candidate sites within roughly 25 miles of SOUTHWEST, 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 |
|---|---|---|---|---|---|---|---|
| MAPLE VALLEY | Substation-Adjacent | WA | King County | 500 kV | 1,000 MW | 1.7 yrs | 76.0 |
| TACOMA | Substation-Adjacent | WA | Pierce County | 500 kV | 1,000 MW | 1.7 yrs | 75.6 |
| BERRYDALE | Substation-Adjacent | WA | King County | 230 kV | 300 MW | 1.7 yrs | 73.1 |
| SOUTHWEST | Substation-Adjacent | WA | Pierce County | 230 kV | 300 MW | 1.7 yrs | 72.4 |
| TAP206441 | Substation-Adjacent | WA | Pierce County | 230 kV | 300 MW | 1.7 yrs | 72.3 |
| SOUTH | Substation-Adjacent | WA | Kitsap County | 230 kV | 300 MW | 1.7 yrs | 72.1 |
| UNKNOWN205981 | Substation-Adjacent | WA | Kitsap County | 230 kV | 300 MW | 1.7 yrs | 71.9 |
| COVINGTON | Substation-Adjacent | WA | King County | 500 kV | 1,000 MW | 1.7 yrs | 71.8 |
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 SOUTHWEST substation, Washington. 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.