ASDSO Dam Safety Toolbox

⚠ Include an Upstream Gate/Valve

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Revision as of 20:51, 15 September 2022 by Grichards (talk | contribs)
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Message: An upstream gate allows for the conduit to be inspected without draining the reservoir.


This Montana Dam has a downstream slide gate but does not have an upstream gate. The reservoir needs to be completely drained in order to complete an outlet inspection.

  • Because this dam does not have an upstream gate, the reservoir needed to be drained to access the outlet conduit.

    Because this dam does not have an upstream gate, the reservoir needed to be drained to access the outlet conduit.

  • Beginning the inspection.

    Beginning the inspection.

  • The inspection was completed using a CCTV Camera on a Pipe-Crawler. See the Investigation page for more information.

    The inspection was completed using a CCTV Camera on a Pipe-Crawler. See the Investigation page for more information.

  • The inspection revealed debris in the conduit. A trashrack would help mitigate debris in the conduit.

    The inspection revealed debris in the conduit. A trashrack would help mitigate debris in the conduit.

  • Location of downstream slide gate. An additional 20 feet of HDPE is downstream of this structure.

    Location of downstream slide gate. An additional 20 feet of HDPE is downstream of this structure.


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: 3196
Revision Date: 09/15/2022

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