Spillway Monticello Dam

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lake berryessa overflowing glory hole spillway.



spillway on october 10, 2009 when water 32.24 feet (9.83 m) below crest.



the spillway @ monticello dam in operation, february 19, 2017.


the dam s morning glory type spillway, known glory hole, 72 feet (22 m) in diameter @ lake level , narrows down 28 feet (8.5 m) @ exit. @ lake s peak level spillway can drain 48,400 cubic feet per second (1,370 m/s), occurs when lake level rises 15.5 feet (4.7 m) above level of funnel.


water spills on lip when lake reaches 1,602,000 acre feet (1.976×10 m) , reservoir elevation of 440 feet (130 m) above sea level. last time reservoir naturally spilled through glory hole on afternoon of february 16, 2017.


after number of storms had caused lake level rise 35.5 inches since january 1, 2017, reservoir on cusp of spilling once again @ 439.2 feet. eager witness event, number of local boaters , recreation enthusiasts generated enough wake cause reservoir spill, albeit briefly, @ 1:45pm on february 13, 2017. lake berryessa reservoir filled , ran glory hole spillway first time in on decade on february 16, 2017 @ approximately 3:00 pm pst .


current lake level status available @ solano county water agency.


swimming near glory hole prohibited. in 1997, emily schwalek of davis died after being caught in current while swimming near glory hole , being swept down pipe after holding on rim 20 minutes.








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