SUMMARY: Jack Webster reports on the planned demolition of Ripple Rock. Includes an interview with the project supervisor, Dr. Victor Dolmage. Collision with Ripple Rock has been the cause of many marine accidents and deaths.;

Industrial film. The destruction of Ripple Rock, a long-time menace to shipping in Seymour Narrows, by the world's largest non-nuclear explosion. Footage includes animated diagrams of the project; preparatory tests with models; underwater tunnelling and drilling operations; the shipment and placing of explosives; aerial and general views of the Narrows, and the various technical preparations for the explosion, as well as the blast and its results.

Out-takes. The destruction of Ripple Rock, a long-time menace to shipping in Seymour Narrows, by the world's largest non-nuclear explosion. Footage includes animated diagrams of the project; preparatory tests with models; underwater tunnelling and drilling operations; the shipment and placing of explosives; aerial and general views of the Narrows, and the various technical preparations for the explosion, as well as the blast and its results.