What is the mysterious hole in California lake?

The Lake Berryessa 'Glory Hole' The spillway design chosen for Berryessa is variously called a bell-mouth, a morning glory, or — most commonly — a glory hole. According to Visit Napa Valley, it's essentially a giant concrete funnel sticking up out of the dam, 75 feet in diameter at the top and 28 feet at the base.



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Napa -- Emily Schwalek, 41, of Davis was killed Sunday when she was sucked” down a spillway at the Monticello Dam at Lake Berryessa. The spillway, which drops straight down more than 200 feet, is known as the Glory Hole.

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Turnover is like being at the mall … or at a fair. Turnover is a natural way the lake cleans up harmful bacteria and algae. It carries dead algae down into the depths of the lake where there is less sunlight, helping to prevent algae growth.

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