| 11. | The dam's crest was raised to prevent overtopping during the projected maximum flood condition.
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| 12. | However others have proposed that the lava dams were much more ephemeral and failed catastrophically before overtopping.
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| 13. | The muddy waters flowed rapidly downstream causing flooding in the evacuated town of Beichuan and overtopping of dams.
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| 14. | The floodway is operated by a controlled destruction of the levee, either with explosives or by overtopping.
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| 15. | Rainfall lasted from March 23 till April 78 and as a consequence the R�o Negro suffered an overtopping.
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| 16. | Prior to the landslide that caused the overtopping flood, the creep of the regolith had been per week.
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| 17. | However, Lake Pontchartrain rose to a higher level than previously recorded, overtopping some of the back levees.
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| 18. | The LSU report subsequently found that overtopping did not occur, rather, design failures precipited the levee failures.
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| 19. | The dam does not have a spillway capable of withstanding a 100 year flood, and thus often experiences overtopping.
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| 20. | Particular attention is given to the matter of surface erosion, overtopping prevention and protection of levee crest and downstream slope.
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