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In 1986, water flowed over the top of the Auburn Cofferdam and resulted in complete failure of the dam. See this video of that incident [1] for an example of ho
by mintyfresh 10y ago
In 1986, water flowed over the top of the Auburn Cofferdam and resulted in complete failure of the dam. See this video of that incident [1] for an example of how the overtopping of an earthen dam leads to failure.
[1] https://www.youtube.com/watch?v=tDmwo5nsWfQ https://www.youtube.com/watch?v=tDmwo5nsWfQ
- klenwell 10y agoInteresting footage. There's a good before/after comparison at the end: https://youtu.be/tDmwo5nsWfQ?t=9m4s https://youtu.be/tDmwo5nsWfQ?t=9m4s
- LeoPanthera 10y agoThis seems to show that it was the "spillway plug" that eroded and failed. I don't know what a spillway plug is, but the narration seems to imply that it is designed to fail in emergency situations.
- mintyfresh 10y agoIn the beginning of the video, the narration talks about the spillway plug being a feature designed to erode in a fashion that delayed/slowed the inevitable failure of the entire dam. In this case, the spillway plug helped the dam release water in a semi-controlled fashion over a series of hours, instead of an uncontrolled fashion in a matter of minutes.
- JshWright 10y agoIf a embankment dam is overtopped, it is going to fail. They designed it with a slightly lower section on one end so they could be sure if it failed, it failed in a predictable way.
- mcguire 10y agoWoah. Could you give me some more VCR, please? This was the coffer dam for the construction of Auburn Dam, work on which was halted, but the coffer dam never removed? Excellent video!