Detailed text transcripts for TV channel - CNN - 20160408:10:30:00
Rock, making erosion a constant challenge. we enter the underbelly of the dam to see how it is even still standing. completed in the mid 1980s, what keeps it all intact is a process that needs to happen daily. workers are drilling bore holes. this one will go down 150 meters, or around 500 feet. drilling that particular distance takes about a week. and the machines go up and down the length of the dam, breaking up and then repouring cement to try to ensure the stability of the dams foundation. i...
Source: archive.org