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.
A comprehensive panel discussion covering lessons learned during last spring’s spillway failure at Oroville Dam was a highlight of the annual Dam Safety conference.
If initial lessons included in an interim status report on the cause of February’s failure of the main spillway at California’s Oroville Dam are heeded, hundreds of U.S. dams more than 50 years old may have to be re-examined and upgraded.
In a race to fix the damaged Oroville Dam’s main spillway by November, California Dept. of Water Resources, the operator of the country’s tallest dam, is going to bid with a 65%-complete design that breaks recovery efforts into three parts, with an ultimate goal of doubling the main spillway’s release
After armoring the damaged Oroville dam spillway, California Department of Water Resources is draining the lake at a rate of 40,000 cubic feet per second.