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  1. Bell-Mouth Spillways: How Giant Holes in the Water are Possible

  2. Spillway - Wikipedia

  3. 7 Different Types of Spillways – theconstructor.org

  4. Monticello Dam and its Morning Glory Spillway - Bureau of …

  5. How Do Spillways Work? - Practical Engineering

  6. Bellmouth - an overview | ScienceDirect Topics

  7. Bell-mouth spillway - Mike Higginbottom Interesting Times

  8. Morning Glory Spillway - Davis - LocalWiki

  9. Tallest bell-mouth spillway - Guinness World Records