PORTSMOUTH
Substation-AdjacentMultnomah County, Oregon · WECC
At a glance
PORTSMOUTH is a substation-adjacent datacenter candidate site in Multnomah County, Oregon, scoring 60.9/100 DC Readiness — 60th of 234 scored sites in the county. Its nearest substation is PORTSMOUTH (0 mi, 115 kV). It sits in the WECC grid region and the PORTLAND GENERAL ELECTRIC CO service territory, where interconnection has averaged 3.5 years from request to operation. GridCensus catalogs 100 MW of candidate capacity here.
Power & interconnection
Speed to power
Deep queue and long historical waits — plan for a multi-year interconnection timeline and engage the utility early.
Connectivity
Site characteristics
Risk & environment
Location context
Regulatory climate
No notable statewide DC restriction on record; confirm local zoning and utility tariffs.
Incentive detail: Enterprise Zone property tax exemption for 3-15 years; no sales tax in Oregon.
Site location
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How does PORTSMOUTH compare with other sites in Multnomah County?
PORTSMOUTH ranks 60th of 234 scored candidate sites in Multnomah County. Its 60.9/100 is roughly in line with the county average of 58.5. It is about 15% above the Oregon average of 53.1 and about 14% above the national average of 53.2.
Against the Oregon average, its strongest sub-score is fiber connectivity (94 vs 66) and its weakest is speed to power (50 vs 50). Power and speed to power each carry 20% of the composite score, fiber 12%, water 7% and hazard 6%.
How close is PORTSMOUTH to power, fiber and other datacenters?
The nearest mapped substation, PORTSMOUTH, is about 0 miles away and operates at 115 kV. For connectivity, the nearest internet exchange facility is Lumen Portland at 4.7 miles. 10 fiber providers report service at the location in FCC broadband data. The closest operating datacenter on record is H5 Data Centers Portland (OR01), 4.7 miles away.
What are the flood, water and hazard risks at PORTSMOUTH?
At the county level, FEMA's National Risk Index rates Multnomah County "Relatively Low".
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 Multnomah County, ranked by DC Readiness.
| Site | Type | Voltage | Capacity | Queue wait | Score |
|---|---|---|---|---|---|
| BPA TROUTDALE | Substation-Adjacent | 500 kV | 1,000 MW | 3.5 yrs | 69.7 |
| OSTRANDER | Substation-Adjacent | 500 kV | 1,000 MW | 3.5 yrs | 68.7 |
| CARVER | Substation-Adjacent | 230 kV | 300 MW | 3.5 yrs | 66.3 |
| BLUE LAKE | Substation-Adjacent | 230 kV | 300 MW | 3.5 yrs | 66.2 |
| GRESHAM | Substation-Adjacent | 230 kV | 300 MW | 3.5 yrs | 66.1 |
| MCLOUGHLIN | Substation-Adjacent | 230 kV | 300 MW | 3.5 yrs | 64.9 |
| TAP203170 | Substation-Adjacent | 230 kV | 300 MW | 3.5 yrs | 64.6 |
| OZ Multnomah | Greenfield | — | — | 3.5 yrs | 64.4 |
PORTSMOUTH: common questions
What is the DC Readiness score of PORTSMOUTH?
PORTSMOUTH scores 60.9/100 on the GridCensus DC Readiness scale, rated good. It ranks 60th of 234 scored sites in Multnomah County. The Multnomah County average is 58.5 and the Oregon average is 53.1.
What is the nearest substation to PORTSMOUTH?
The nearest mapped substation is PORTSMOUTH, about 0 miles away, at 115 kV. GridCensus catalogs 100 MW of candidate capacity for the site.
Which electric utility serves PORTSMOUTH?
PORTLAND GENERAL ELECTRIC CO (investor owned) holds the retail service territory that contains the site.
What grid region is PORTSMOUTH in?
PORTSMOUTH is in the WECC region. Projects interconnecting there have averaged a 3.5-year wait from queue request to operation.
How far is PORTSMOUTH from an internet exchange?
The nearest internet exchange facility is Lumen Portland, about 4.7 miles away; 10 fiber providers report service at the location.
Related pages
About this data
Source: GridCensus composite of HIFLD transmission and substation data, EIA, FEMA National Risk Index, FCC broadband data, PeeringDB and ISO interconnection queues, as published October 10, 2026 — GridCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.
Cite as: GridCensus, “PORTSMOUTH, Multnomah County, OR”, https://gridcensus.com/datacenter-sites/oregon/multnomah-county/portsmouth-4882118a (data as of October 10, 2026).
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.
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