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

  1. Background 
    1. Potential Failure Modes associated with voids underneath spillways
    2. Theory, application, and design of defensive measures
    3. Field exploration approaches and non-destructive techniques for detecting and monitoring voids
    4. Interim risk reduction measure considerations and examples
  2. Q&A Session 1 
  3. Horseshoe Lake a.k.a Upper Shaker Lake Dam (OH) Spillway Case Study 
    1. Background/History of concerns
  4. 2011 Emergency repair to shore spillway
    1. 2018: void/sinkhole detected
    2. 2019: repairs
    3. 2021: Interim risk reduction plan
    4. Lessons learned
  5. Ethan Dam (a SD Low Hazard Dam) Spillway Case Studies 
    1. Background/History of void concerns
    2. Spillway void investigations
    3. Temporary risk reduction
  6. Sinlahekin Dam No. 3 (WA) Spillway Case Study 
    1. Background/History of void concerns
    2. Spillway void investigations
    3. Temporary risk reduction
  7. Arkansas Game and Fish Dam Example 
    1. Background/History of void concerns
    2. Spillway void investigations
    3. Temporary risk reduction
    4. Long-Term Modifications
  8. Oglala Dam Case Study 
    1. Background/History of void concerns
    2. Spillway void investigations
    3. Emergency Incident Summary
    4. Temporary risk reduction
    5. Long-Term Modifications
  9. Final Q&A
ON THIS PAGE:
Webinar Home
Register Online
Instructor