Wednesday, October 14, 2026News, analysis and data on AI infrastructure
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DeepGreen seeks four-year FERC permits for tidal-powered underwater data centers in Maine and Alaska

Two subsidiaries of DeepGreen LLC applied to the Federal Energy Regulatory Commission for preliminary permits, each giving four years of study rights, for proposed underwater data centers in Maine's Bay of Fundy and a more than 1,000-acre channel of Alaska's Cook Inlet. Filings describe hundreds of hydrokinetic turbines, dozens of underwater data center pods and miles of subsea cable, all powered by tidal energy. The permits would not authorize construction. The National Marine Fisheries Service has intervened in the Maine case, the Center for Biological Diversity has filed motions to intervene in both, and Eastport, Maine, has passed a data center moratorium and filed to intervene.

Why it matters

Tidal-powered offshore sites would avoid land use constraints, but this early-stage filing shows they face marine habitat reviews, local opposition and possible litigation before any construction could be considered.

Original reporting: Heatmap

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