ASDSO Dam Safety Toolbox

Deteriorated conduits with holes can cause seepage

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Message: Deteriorated conduits must be taken seriously.


In 2018, a large sinkhole was discovered in the back slope of Reser Dam. The outlet pipe is a deteriorated, corrugated metal pipe with holes. It is likely the holes in the outlet pipe are the source of the seepage that caused the sinkhole.

  • Sinkhole in slope of dam

    Sinkhole in slope of dam

  • Sinkhole in slope of dam

    Sinkhole in slope of dam

  • Sinkhole in slope of dam

    Sinkhole in slope of dam

  • Active seepage in sinkhole

    Active seepage in sinkhole

  • Active seepage coming from sinkhole

    Active seepage coming from sinkhole

  • Outlet conduit

    Outlet conduit

  • Outlet conduit and back slope of dam

    Outlet conduit and back slope of dam


Revision ID: 1223
Revision Date: 06/22/2022

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