See Mammoth 'Hole' Open In This Lake - Weir glory hole
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A spillway is a structure used to provide the controlled release of flows from a dam or levee into . Lake Berryessa overflowing into the Glory Hole spillway at Monticello dam. A labyrinth spillway and a fish ladder Hydraulic Design of Stepped Cascades, Channels, Weirs and Spillways. Pergamon. ISBN The water level in the Lake Berryessa reservoir, 75 miles north of San Francisco, has risen so much that, unusually, water is pouring into its overflow pipe, as can be seen in footage published by The Vacaville Reporter. The overflow, known as the Morning Glory Spillway, or simply.