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
A trio of spillway failures at the 770-ft-tall earthfill Oroville Dam that prompted the evacuation of more than 188,000 people from central California has renewed questions about the reliability of hundreds of dams in the state and more nationally.
Because it can moderate the damaging effects of earthquakes, base-isolation is a technique used primarily in seismically active regions. ENR takes a look at some of the largest applications of base-isolation technologies in the world.