ASDSO Dam Safety Toolbox

Connection between Riser and Conduit often First to Fail

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Message: Corrosion at the connection between a drop inlet and the conduit is the cause of many dam failures.


The connection between the drop pipe and the conduit can be difficult to evaluate. However, the condition of the connection is very important and corrosion can be a serious problem. Even if the rest of the pipe appears to be in good condition, the connection may not be.

  • Failure of the connection between the CMP drop inlet and the conduit resulted in a large hole on upstream face of this dam.

    Failure of the connection between the CMP drop inlet and the conduit resulted in a large hole on upstream face of this dam.

  • The reservoir quickly drained around the damaged conduit, resulting in a loss of the season’s irrigation water.

    The reservoir quickly drained around the damaged conduit, resulting in a loss of the season’s irrigation water.


Revision ID: 1152
Revision Date: 06/21/2022

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