Hydroseeding Stabilizes Oroville Dam During, After Crisis

On Feb. 7, 2017, a 200-ft. pothole opened up in the main spillway of the Oroville Dam in northern California. With snowpack at 150 percent above normal in the Sierra mountains, and Lake Oroville still rising, officials reduced the amount of flow on the main spillway. On Feb. 12, as 188,000 residents downstream nervously watched on the news, water began tumbling over the never-before-used emergency spillway....

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