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Explanation 👇👇
The seventh largest man made lake in California is held by the 304 foot tall Monticello Dam and is home to famous “Glory Hole” spillway. The spillway is the funnel shape at the opening it measures 72 feet across becoming narrowing down to aprox 28 feet as it drops down 200 vertical feet.
It’s objective is to drain out the water when the lake is filled to maximum. The water on drained out to the other side of the dam directly into Putah Creek.
This video was recorded by a drone when the spillway was in action on 16th feb 2017.