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The largest drain hole in the
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 Located in
northern California, the Monticello Dam’s is the largest
morning glory spillway all over the world. This funnel-shaped
outlet, allows water to bypass the dam when it reaches
capacity, as it swallows a rate of 48,400 cubic feet per
second (1370 m³/s).
 The distance
from the funnel to the exit point - which is situated in the
south side of the canyon - is about 700 feet.
© 2006 Jeff
Carlson, used with permission
This type of spillway is basically a giant
cement funnel. The hole's largest diameter is 72 feet and narrows
to about 28 feet.
 According to
Davis Wiki, "for obvious reasons, swimming near the
glory hole is both prohibited and stupid. There are buoys strung
across the lake to discourage boaters and swimmers from approaching
the glory hole and the dam. Furthermore, the glory hole is well
fenced off from the land.".
 "During the
drier months, when Lake Berryessa's water level is well below
the rim of the glory hole, skateboarders and bikers sometimes
use the spillway's horizontal exit as a half-pipe”.
 Finally, you can
take a look at the hole on
Google Maps:
 More info and sources:
1,
2, 3,
4 y
5
Other drain
holes (updated from reddit and
Fogonazos comments)
Langelsheim (Germany)
Harriman Dam, Vermont - New England (USA)
Turquoise lake, Colorado (USA)
Benagéber, Valencia (Spain)
San Roque Lake, Cordoba (Argentina)
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| Harriman Dam, Vermont - New England
(USA) |
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| Turquoise lake, Colorado
(USA) |
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| Benagéber, Valencia
(Spain) |
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| San Roque Lake, Cordoba
(Argentina) |
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