Voids Beneath Spillway Slabs: Evaluation, Interim, and Long-term Risk Reduction Considerations

Join us on Tuesday, November 10, 2026, from 12:00 PM - 2:00 PM Eastern for Voids Beneath Spillway Slabs: Evaluation, Interim, and Long-term Risk Reduction Considerations. This webinar will introduce lessons learned related to voids beneath spillway slabs. Case histories will be presented highlighting different detection, monitoring, interim and long-term repair techniques. The development and subsequent evaluation of potential failure modes associated with voids beneath spillways will be presented along with a discussion of different interim risk reduction and long-term repair considerations and alternatives. Case histories will include various state and private owner examples.

Learning objectives attendees will receive from this webinar:

• Gain an awareness of Potential Failure Modes (PFMs) associated with voids underneath spillways and learn how to use analysis results to assess these PFMs.
• Become more familiar with different field exploration approaches and non-destructive techniques for detecting and monitoring voids using case histories to illustrate key principles.
• Recognize the advantages and limitations of various monitoring methods.
• Learn about the evaluation of different interim and long-term repair alternatives.
• Understand the complexity and coordination required when evaluating interim risk reduction measures.
• Broaden knowledge regarding the theory, application, and design of defensive measures.

PDHS AVAILABLE:

• This course qualifies for 2 PDHs.

registration fees:

• Member Rate: $99
• Non-Member Rate: $130 - Join ASDSO before registering and save!