Welling up against the northernmost ridge of the Canadian Rockies, the Williston Reservoir in British Columbia is the seventh-largest reservoir by volume in the entire world. Its 680-square-mile (1,761-square-kilometer) expanse is so vast that the government power utility responsible for its upkeep, B.C. Hydro, can’t really monitor this artificial lake in its entirety without volunteer reports from the general public and sporadic satellite surveillance.
And, right now, B.C. Hydro is on the lookout for an elusive, tree-lined, floating island about the size of two NFL football fields, or an entire Manhattan city block, spanning over 105,000…
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