The overflow pipe at California’s Lake Berryessa has been put to work for the second time in two years after heavy rain filled the reservoir to its capacity.
When the overflow pipe was built in 1957, the US Bureau of Reclamation said that it expected it to be used once every 50 years. However heavy rains have seen it used twice in two years and four times in the last three decades.
The pipe itself has a 22m diameter pipe and can take in lake water at a rate of 1359 m3 per s.
Water is taken in by the pipe once the Lake Berryessa reservoir is filled to capacity, and then is shot into a creek below the Monticello Dam.
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