Teresa Seim of Oroville evacuated to the Silver Dollar Fairgrounds in Chico.
Scrutiny continued to grow over the emergency spillway at Oroville Dam after it eroded Sunday, forcing the evacuations of more than 100,000 people.
The damage occurred even though the spillway was designed to handle much more water than the amount that overflowed. Some questioned why officials didn’t heed suggestions more than a decade ago to fortify the emergency spillway.
Earth and weak rock near the top of the spillway started to erode when peak flows were 12,600 cubic feet per second, compared with the designed capacity of 450,000 cubic feet per second, according to the Department of Water Resources. The erosion happened so quickly that officials feared the concrete wall would be undermined, and ordered sweeping evacuations in Butte, Yuba and Sutter counties that remained in effect Monday night.