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Reopening for 2026. Hours, dates, and admission may vary — check official site for current details. Last verified: 8/31/2026 The USS Nightmare is the resurrection of the William S. Mitchell. The boat is in the exact condition it was left in the aftermath of the Mitchell Massacre. To this very day, anyone who enters is tormented by the sinister past of this former dredging vessel – including the cast and crew of our haunted dredge boat tour.
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