Amazon data center campus at Wallula Gap Business Park
Also called: Advance Phase LLC, Amazon Attalia Data Center Campus
Amazon bought about 554 acres from the Port of Walla Walla for a data center campus of up to 16 buildings, said to cost about $4.8 billion. The buyer's name was first kept secret. The county said on Sept. 1, 2026 that Amazon's application for a first phase of three buildings was complete. Days later Amazon said it had paused work, so the plan's future is unclear.
Where things stand: County found Amazon's first application complete on Sept 1, 2026, but days later Amazon said it paused work and has no timeline.
🕒 Latest update (Sept 1, 2026): Walla Walla County found Amazon's land-use application complete for a first phase: three 220,000-square-foot buildings on 134 acres off Sundance Road.
What we know
- 📍 WhereWallula Gap Business Park, off U.S. Highway 12 and Attalia East Road, near Wallula and Burbank, Walla Walla County
- 🏢 CompanyAmazon Data Services, Inc. (bought as successor to Advance Phase LLC)
- 🏛️ Owned byAmazon
- 👤 Built forAmazon (AWS)
- 🌳 Size554 acres
- 💵 Cost$4.8 billion
- 🤐 Secret deal (NDA)Yes. The port said in 2024 it signed a secret deal (NDA) that kept the buyer's name hidden.
❓ Still unanswered
Nobody has answered these in public yet. Can you help find out?
- Will Amazon go ahead with the Wallula Gap campus, and when? 🙋 I'll find out
- How much power will it use, and which utility will supply it? 🙋 I'll find out
- How much water will it use per day, and from where? 🙋 I'll find out
- Is Amazon's county application for the first three buildings still active, or withdrawn? 🙋 I'll find out
- How many diesel backup generators will it have? 🙋 I'll find out
What happened so far
- Oct 24, 2024Port of Walla Walla commissioners voted to sign a letter of intent to sell 500 acres to Advance Phase LLC for $32.5 million.
- Feb 12, 2026Port commissioners approved selling about 554 acres to Amazon Data Services for about $36 million.
- Aug 11, 2026Amazon held an open house in Burbank about the plan.
- Sept 2026Amazon said it paused work on the project and has no set timeline.
- Sept 1, 2026Walla Walla County found Amazon's land-use application complete for a first phase: three 220,000-square-foot buildings on 134 acres off Sundance Road.
An aerial photo of the area.
Where this comes from
- Port of Walla Walla to move forward with proposed data centers · Elkhorn Media Group · Oct 25, 2024
- 'Transformative' $5 billion data center campus planned for Wallula · Tri-Cities Area Journal of Business · Nov 14, 2024
- Port of Walla Walla approves $36M land sale to Amazon for data center campus · Elkhorn Media Group · Feb 13, 2026
- What to know about 4 major data center proposals for Tri-Cities area (Tri-City Herald reporting) · Yahoo News / Tri-City Herald · May 12, 2026
- Amazon's proposed data center application deemed complete by Walla Walla County · Elkhorn Media Group · Sept 1, 2026
- Amazon works to stem data center fears at Burbank open house · Tri-Cities Area Journal of Business · Sept 10, 2026
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