The latest wave of "atmospheric rivers" required opening of the Oroville Dam main spillway for just the second time since its 2018 rebuild.

The California Dept. of Water Resources (DWR) began releasing water from Oroville Reservoir earlier this month for the first time since the two-year, $1.1-billion emergency spillway reconstruction project was completed late last year.

Replacing flood-ravaged spillways at Oroville Dam in just 18 months over two brief construction seasons required the focus and tenacity of many.

Engineers and workers at Lake Oroville race to complete critical spillway repairs to mitigate catastrophic flood risk for downstream communities.

Designing and building California’s $500-million Lake Oroville Spillways Emergency Recovery Project in just nine months—a job that typically would take 10 years—required an army of engineers and workers.

Forensic team delivers final verdict on the physical and human causes of the spillway emergency last February at the nation's tallest dam.

A mix of brute force and cutting-edge technology enabled contractors to replace a large portion of Oroville Dam’s spillway chute in just 165 days, meeting a Nov. 1 deadline set in anticipation of the start of northern California’s winter rainy season.