Comment deadline removed
Amazon Wallula Gap Data Center Campus (Attalia / Advance Phase LLC)
Amazon Data Services (filed as Advance Phase LLC). Filed
The Port of Walla Walla agreed in late 2024 to sell more than 550 acres in the Wallula Gap Business Park, about 10 miles east of Pasco, to a then unnamed developer called Advance Phase LLC, later confirmed to be Amazon Data Services, for a roughly 4.8 to 5 billion dollar cluster of up to 16 data center buildings totaling more than 3.4 million square feet. Walla Walla County's 30 day public comment period on whether the first phase, three roughly 215,000 square foot buildings, needs a full environmental impact statement closed October 12, 2026 with more than 700 comments submitted, many from Earthjustice and other critics disputing the county's no-EIS determination, while county commissioners said on September 14, 2026 they would not pursue a countywide moratorium. The county must now issue a SEPA threshold determination and will open a further comment period once that decision is made; opponents continue to cite Amazon's 20.5 million dollar settlement earlier in 2026 over nitrate groundwater contamination tied to its Oregon data centers, and hundreds of protesters have turned out across the state calling for a statewide moratorium.
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- Status
- Filed
- Operator
- Amazon Data Services
- Applicant on record
- Advance Phase LLC
- Location
- Wallula, Walla Walla County, WA (approximate, city center)
- Size
- MW not reported, 553 acres, 3,400,000 sq ft
- Cooling
- Not reported
- Utility
- Not reported
- First reported
- 2024-11
- Last updated
- October 19, 2026
What happens next
Still to come: public hearings, a rezoning or permit vote, and a utility interconnection agreement.
Sources
- Amazon's proposed data center application deemed complete by Walla Walla County, Elkhorn Media Group, 2026-09
- 'Transformative' $5 billion data center campus planned for Wallula, Tri-Cities Area Journal of Business
- It's official. Amazon is $5B mystery data center developer near Tri-Cities, Yahoo / Tri-City Herald
- Amazon's Walla Walla data center plan sparks tension between protesters, local officials, Washington State Standard, 2026-10-06
- Amazon to pay $20.5 million settlement over northeast Oregon nitrate pollution, Oregon Capital Chronicle, 2026-03-31
- Walla Walla County publishes residents' comments on Amazon data center, Walla Walla Union-Bulletin
- Walla Walla County commissioners won't consider data center moratorium, Walla Walla Union-Bulletin
History
Comment deadline: October 12, 2026
Added as filed
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Common questions
Where is the Amazon Wallula Gap data center?
It is in Wallula, Walla Walla County, WA.
Has the Amazon Wallula Gap data center been approved?
Not yet. An application has been filed and has not been decided.
How big is the Amazon Wallula Gap data center?
Reported size: 553 acres, 3,400,000 square feet.
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