Ripple Rock

Canada, 1958

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An on-the-spot account of how a shipping hazard on Canada’s west coast was blasted out of existence by the worlds greatest non-atomic explosion. The film shows how the submerged twin peaks of Ripple Rock, in Seymour Narrows between Vancouver Island and the British Columbia mainland, were packed with high explosives through an underwater tunnel, and then blown sky-high. For the first time in history ships could pass back and forth without fear of being caught by the underwater death trap.


production company

National Film Board of Canada






Black and White

ACMI Identifier


Subject categories

Anthropology, Ethnology, Exploration & Travel → British Columbia

Anthropology, Ethnology, Exploration & Travel → Canada

Armed Forces, Military, War & Weapons → Explosives


Documentary → Documentary films - Canada

Mathematics, Science & Technology → Engineering

Mathematics, Science & Technology → Marine engineering

Places → Canada

Short films

Short films → Short films - Canada




16mm film; Limited Access Print (Section 2)

16mm film; Access Print (Section 1)

16mm film; Preservation Print (Section 5)

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