The California Oroville Dam spillway was overflowing and the surrounding towns had to be evacuated. 188,000 residents were evacuated due to the menacing floodwaters. The dam was built in the 1960's when the temperatures were cooler and less water filled the rivers/dams. A massive crater was created in the dam due to high pressure water running down the spillway. They ended up using the paved emergency spillway in order to avoid letting the crater get bigger. There was erosion on the side of the emergency spillway creating costly problems for the dam. This resulted in using the spillway (with the crater) and just letting the dam release the water down to the safe limit line. To avoid other incidents like this happening other areas should update their scientific data to avoid these crises.
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May 2017
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