SOUTHWEST
Substation-AdjacentPierce County, Washington · WECC
SOUTHWEST is a substation-adjacent datacenter candidate site in Pierce County, Washington, interconnecting through WECC. It screens at 62.0/100 DC Readiness with a catalogued 300 MW of candidate capacity and a 6.9 yrs average interconnection-queue wait.
Power & interconnection
Connectivity
Site characteristics
Risk & environment
Location context
Incentive detail: Sales tax exemption on DC equipment and construction for eligible facilities; no state income tax.
Site location
Full DC Readiness breakdown
All 13 weighted sub-scores (0–100) behind the composite DC Readiness score.
Nearby comparable sites
Other scored datacenter candidate sites in Pierce County, ranked by DC Readiness.
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| OZ Pierce | Greenfield | — | — | 1.7 yrs | 64.2 |
| OZ Pierce | Greenfield | — | — | 1.7 yrs | 63.9 |
| TAP203448 | Substation-Adjacent | 230 kV | 300 MW | 6.9 yrs | 62.4 |
| PEARL | Substation-Adjacent | 230 kV | 300 MW | 6.9 yrs | 62.2 |
| COWLITZ | Substation-Adjacent | 230 kV | 300 MW | 6.9 yrs | 62.1 |
| UNKNOWN200891 | Substation-Adjacent | 230 kV | 300 MW | 6.9 yrs | 61.8 |
| WHITE RIVER | Substation-Adjacent | 230 kV | 300 MW | 6.9 yrs | 61.7 |
| TAP206441 | Substation-Adjacent | 230 kV | 300 MW | 6.9 yrs | 61.5 |
Dataset updated . Screening estimates derived from public data sources.
Figures are screening estimates derived from public infrastructure data. Catalogued capacity reflects theoretical candidate capacity, not deliverable or committed interconnection. Confirm all values with the utility, ISO, and on-the-ground due diligence.
Go deeper than the public screen
This page shows a public slice of the GridCensus dataset for SOUTHWEST, Pierce County. 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.