ASDSO Dam Safety Toolbox

Debris Clogging Intake Structure can lead to Overtopping

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Message: Make sure trash racks are properly designed (so they don’t need constant attention).


Debris clogged the drop inlet intake structure of this remote Lincoln County, MT dam, which resulted in overtopping of the dam and near failure.

  • This Montana dam is shown overtopping

    This Montana dam is shown overtopping

  • What was the cause? The drop inlet structure clogged with debris.

    What was the cause? The drop inlet structure clogged with debris.


Note: The content on this page was originally created as part of DamOutletWorks.org (DOWL, 2018). It has subsequently been updated and reformatted as part of the Dam Safety Toolbox.
Revision ID: 3150
Revision Date: 09/15/2022

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