The level has been above the glory hole = 46. The dam was completed in 1957, creating Lake Berryessa while eliminating a small community in the process. "Of course, it buried a town. There was a ...

Monticello Dam was built in 1957 to trap Putah Creek’s waters and create Lake Berryessa. The valley, which was dubbed “devil’s gate,” was too narrow for a typical spillway design like the ...

While most dams rely on spillways shaped like chutes or shafts to drain the overage, the dam at Lake Berryessa uses a funnel-like spillway due to lack of space, per local news outlet The Press ...

Lake Berryessa’s glory hole is back in action. That’s the Morning Glory Spillway, to be exact: a massive, swirling drain at Monticello Dam designed to prevent flooding when Lake Berryessa’s ...

The enormous 'glory hole' in Napa County's Lake Berryessa is visible for the first time since 2019. When the lake's water level rises above 440 feet, this 72-foot wide circular drain prevents ...