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Bell-Mouth Spillways: How Giant Holes in the Water are Possible
Spillway - Wikipedia
7 Different Types of Spillways – theconstructor.org
Monticello Dam and its Morning Glory Spillway - Bureau of …
How Do Spillways Work? - Practical Engineering
Bellmouth - an overview | ScienceDirect Topics
Bell-mouth spillway - Mike Higginbottom Interesting Times
Morning Glory Spillway - Davis - LocalWiki
Tallest bell-mouth spillway - Guinness World Records