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Clement Ripley's novel was serialized in Hearst's International-Cosmopolitan (Mar-June 1936). According to Warner Bros. records, producer Robert Lord turned down the picture because of a heavy schedule, and Howard Hawks was considered as director. Correspondence from Byron "Bud" Haskins suggests that some of the miniature work for the dam explosion was used for both this film and Warner Bros.' 1938 film Valley of the Giants. The film was shot partially on location in Weaverville, CA.