Monticello Dam

Monticello Dam
Winters, California (CA), US
The Monticello Dam was constructed from 1953 to 1957 in Napa County, California to flood Berryessa Valley and create Lake Berryessa, the second-largest lake in California which holds back Lake Berryessa, features a morning glory spillway. This type of spillway is basically a giant cement funnel. Rather than spilling over the dam, high waters spill into the funnel. Morning glory spillways are also known as bell-mouth spillways.

affectionately) known as ???????????? ???????????????????? ???????????????? (not to be confused with this type of glory hole). The glory hole is located about 200 feet from the dam. Water spills over its lip when the lake reaches 1,602,000 acre-feet and a reservoir elevation of 440 feet above sea level. The funnel's largest diameter is 72 feet and narrows to about 28 feet. It is designed to handle a maximum of 362,000 gallons of water per second, which occurs when the lake level rises to 15.5 feet above the level of the funnel. The last time the reservoir spilled through the glory hole was on the morning of May 18, 2006.
The Monticello Dam was constructed from 1953 to 1957 in Napa County, California to flood Berryessa Valley and create Lake Berryessa, the second-largest lake in California which holds back Lake Berryessa, features a morning glory spillway. This type of spillway is basically a giant cement funnel. Rather than spilling over the dam, high waters spill into the funnel. Morning glory spillways are also known as bell-mouth spillways.

affectionately) known as ???????????? ???????????????????? ???????????????? (not to be confused with this type of glory hole). The glory hole is located about 200 feet from the dam. Water spills over its lip when the lake reaches 1,602,000 acre-feet and a reservoir elevation of 440 feet above sea level. The funnel's largest diameter is 72 feet and narrows to about 28 feet. It is designed to handle a maximum of 362,000 gallons of water per second, which occurs when the lake level rises to 15.5 feet above the level of the funnel. The last time the reservoir spilled through the glory hole was on the morning of May 18, 2006.
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Links: www.abc10.com
By: alexstokes25

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alexstokes25
@ 2023-01-29 19:11:40
**PLEASE DECLINE FOR UPDATED RESUBMITTAL OR REVISE ACCORDINGLY:

TITLE: The Glory Hole

DESCRIPTION: The Monticello Dam is a 304-foot high concrete arch dam in Napa County, California, constructed between 1953 and 1957 to impound Putah Creek and create Lake Berryessa in the Vaca Mountains.

The dam's morning-glory-type spillway, known as the Glory Hole, is 72 feet in diameter at lake level and narrows down to only about 28 feet at the exit. At the lake's peak level, the spillway can drain 48,400 cubic feet per second, which occurs when the lake level rises to 15.5 feet above the level of the funnel.

Sadly, the last time the reservoir naturally spilled through the glory hole was on the afternoon of February 26, 2019. Prior to that, the last time the spillway was active was for a brief stint in 2017, when Lake Berryessa reservoir filled and ran into its glory hole spillway for the first time in over a decade.

Swimming near the Glory Hole is prohibited. The only known case of death from the spillway drain occurred in 1997. Emily Schwalek of Davis died after being caught in the current while swimming near the Glory Hole and being swept down the pipe, after holding on to the rim for about 20 minutes.

LINKS: https://www.usbr.gov/projects/index.php?id=186


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