ASDSO Dam Safety Toolbox

Wet Tower with Spillway Splitter Wall No. 1

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Message: Dual chamber with an internal weir have many advantages for low head remote dams with limited need to make releases. If releases are needed, best to include a gate



  • This dual chamber wet tower was installed on this remote Powell County, Montana reservoir, to provide a consistent reservoir level for duck habitat. Flash boards could be removed as needed to increase irrigation releases late in the season.

    This dual chamber wet tower was installed on this remote Powell County, Montana reservoir, to provide a consistent reservoir level for duck habitat. Flash boards could be removed as needed to increase irrigation releases late in the season.

  • Leakage along the sides of the internal divider flashboards was difficult to control. The dam operators found the flashboards difficult to remove when needed.

    Leakage along the sides of the internal divider flashboards was difficult to control. The dam operators found the flashboards difficult to remove when needed.

  • The system was modified later with the addition of a slide gate.

    The system was modified later with the addition of a slide gate.

  • Slide gate inside tower - downstream side

    Slide gate inside tower - downstream side

  • Slide gate inside tower - upstream side

    Slide gate inside tower - upstream side


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: 3191
Revision Date: 09/15/2022

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