Spillover in Lake Berryessa Reservoir Gushes for First Time Since 2019

For the first time in six years, water is gushing through a unique spillway in Lake Berryessa, just north of San Francisco.

Footage provided to The New York Times showed Lake Berryessa’s spillway overflowed with water.Jay Cuetara, Solano County Water

Back-to-back atmospheric rivers have dumped buckets of rain across Northern California, filling its rivers to the brim and beyond. The Russian River spilled over its banks in Sonoma County, and in the far reaches of the state, Lake Shasta, a key marker of the state’s overall water levels, has nearly filled up.

And just east of Napa Valley, a rare not-fully-natural phenomenon was observed for the first time since 2019: Water began gushing, furiously, through a spillway in Lake Berryessa.

The eye-catching event has happened only three other times in the past 20 years, and it has drawn curiosity seekers to the man-made reservoir, 70 miles northeast of San Francisco.

“People were taking pictures and videos and just standing in awe,” said Peter Kilkus, the editor of the Lake Berryessa News, who was there Wednesday morning with about two dozen other people.

The 72-foot-wide spillway, called a morning glory because its shape mimics the flower, is a unique funnel-shaped cement pipe that sits within the reservoir. (Locals call it the glory hole.)

The mechanism is a type of drainage system with water pouring down the pipe and into Putah Creek on the other side of Monticello Dam. The spillway is among a few with that shape in the country; there’s also one at Pleasant Hill Lake in Perrysville, Ohio.

Flow of atmospheric water vapor

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Source: National Oceanic and Atmospheric Administration The animation shows data from the GOES-18 satellite, which uses an infrared wavelength that detects water vapor in the upper troposphere, All times on the map are Pacific. By William B. Davis

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Spillover in Lake Berryessa Reservoir Gushes for First Time Since 2019

Flow of atmospheric water vapor

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