1 / 13

Finding the payoff in reducing risks

Finding the payoff in reducing risks. Northwest Hydropower Association February 2013. Bill Christman, PE Engineering Services manager Chelan County PUD Wenatchee, WA. Earthquake . Lack of anti-burst wrapping Lack of connection between upper and lower vertical elements.

lisette
Download Presentation

Finding the payoff in reducing risks

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Finding the payoff in reducing risks Northwest Hydropower AssociationFebruary 2013 Bill Christman, PEEngineering Services managerChelan County PUDWenatchee, WA

  2. Earthquake Lack of anti-burst wrapping Lack of connection between upper and lower vertical elements Cyprus Street Viaduct – Loma Prieta earthquake

  3. Hurricane Buildings in known flood zone – mapped before the storm Flooding in New York from Hurricane Sandy

  4. Dam failure Missing head cover bolts(known)41 of 49 bolts recovered had fatigue cracks 10 years of increasingmachine vibration Sayano-Shushenskaya Hydro-electric Dam, Russia - 2009

  5. Stadium collapse Sequencing oversight in demolition – “tiny” wires removed too soon University of Washington - 1987

  6. Bridge collapse Budget problems Known weaknesses Tacoma Narrows Bridge - 1940

  7. Bridge collapse Shop drawing gusset plate omission New load w/o verifyingdemand/capacity ratio I-35W Bridge in Minneapolis, Minn. - 2007

  8. Bridge collapse Manhole coversleft open Big storm causes internal flooding Lacey V. Murrow Floating Bridgeacross Lake Washington – 1960, above, and today, right.

  9. Sound practice Post-Folsom spill gate risk reduction: Monitoring and good response to spill gate bearing wear Rocky Reach Dam, Columbia River, WA

  10. Sound practice Monitoring and response to increased uplift (Decrease in foundation drainage) Rock Island Dam, Columbia River, WA

  11. Sound practice • 1961 – designed & built to withstand: • 200 mph winds • Magnitude 9.1 earthquake • Center of gravity is 5 feet above ground level Space NeedleSeattle, Wash.

  12. The higher the risk, the higher the cost No ownershipin the results No link to culture and institutional knowledge

More Related