Monticello: California's Sunken Town Beneath Lake Berryessa
Monticello: California's Sunken Town Beneath Lake Berryessa
US · Published Sep 8, 2026
The town of Monticello, once a thriving community in California's Berryessa Valley, was submerged in 1956 to create Lake Berryessa as part of a major water project.
The valley, known for its fertile soils and close-knit community, was home to farms, schools, and businesses before being flooded.

Impact & Risks

The flooding of Monticello displaced its residents, many of whom struggled to rebuild their lives elsewhere. The loss of fertile farmland and a close-knit community highlights the social and economic costs of large-scale infrastructure projects. While Lake Berryessa now serves as a vital water source and recreational area, the submerged town remains a symbol of the sacrifices made for progress. The occasional reappearance of Monticello's remnants during droughts offers a stark reminder of the town's history and the lives that were uprooted.

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