KEY POINTS
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Two of four developers have pulled back from plans to add large data centers to Seattle’s grid, and three City Council leaders now want a one-year moratorium on new facilities, the Seattle Times reported May 1, 2026.
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The original five projects would have drawn up to 369 megawatts, about one-third of the city’s typical daily load, forcing public utility Seattle City Light to warn that serving both new data centers and existing customers would require new terms, possibly including self-supplied power for large users.
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Seattle’s pivot is an example of the collision of grid capacity, regulatory posture, and community sentiment that sit alongside land and power as decisive factors for data center siting and construction.
The Seattle Times reported May 1, 2026, two developers have withdrawn plans to connect large-scale data centers to Seattle’s electric grid after a wave of public opposition, just as three City Council members prepared legislation for a one-year ban on new data centers inside the city.
The projects were part of a cluster of five proposed facilities from four companies that approached Seattle City Light with a combined maximum demand of 369 megawatts, roughly one-third of the city’s average daily electricity use.
Within a week of that earlier disclosure around the electric-power grab, one unnamed developer dropped out. By late April, Sabey, a regional data center developer, told the Times it was also pulling its request, which sought 68 megawatts at its existing Tukwila campus within City Light territory.
Two developers, Equinix and Prologis, are still pursuing three large data centers that could draw a combined 249 megawatts from the system while City Hall debates whether to pause new projects for at least a year, with an option to extend for six months.
How Seattle’s Power Equation Changed
A few weeks ago, when all five facilities were still on the table, Seattle City Light warned that layering hundreds of megawatts of incremental demand on top of existing needs would complicate its ability to reliably serve residents and businesses.
Seattle already hosts about 30 data centers, but most are relatively small by modern hyperscale and AI standards. To protect its system, the public utility began drafting new terms for large data center customers, potentially requiring them to secure a dedicated power source outside the city’s core supply portfolio. That decision could move some projects toward private power generation or off-system contracts.
At the same time, elected officials were hit with more than 54,000 messages from residents voicing “intense public alarm” over the proposals, according to the Times. The volume and speed of that feedback helped move the discussion from internal utility planning into a broader citywide policy debate.
Seattle City Councilmembers Eddie Lin, Debora Juarez, and Council President Joy Hollingsworth now plan to introduce a one-year moratorium on new data centers, with an option to extend the pause by six months. The proposal arrives as officials consider how large AI data centers fit alongside other demands on limited grid capacity.
The mayor’s office has signaled that a broader policy response to large data center proposals is coming, including the possibility of a moratorium on siting new facilities.
U.S. Data Center Construction Remains Robust
Even as Seattle reconsiders its data center pipeline, U.S. data center construction remains robust.
ConstructConnect’s May 2026 Data Center Report shows the 12‑month moving average for data center starts spending through March 2026 at $10.1 billion. Average monthly spending is up more than 600% in two years and on pace to reach roughly $121 billion in 2026, if current trends hold, ConstructConnect economists Michael Guckes and Devin Bell reported.
For project teams, Seattle offers an example of how large-load proposals can move quickly from technical questions into public hearings and headline decisions.
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