An independent team of dam experts says bad design and construction led to the massive erosion problem at Lake Oroville's spillways this past winter.
The expert panel says the state probably could have foreseen the spillway failures if dam managers had used modern engineering standards to review the flaws in the structures' original design.
Erin Mellon is a spokeswoman for the California Department of Water Resources.
Nearly 200,000 people were ordered to evacuate in February over concerns Oroville's emergency spillway could fail.
California Assemblyman James Gallagher represents those affected.
He say the findings are consistent with what he's been saying.
Gallagher introduced a bill earlier this year with the goal of improving the inspection process.
It was killed in the Senate Appropriations Committee last week.