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Finding the payoff in reducing risks Northwest Hydropower Association February 2013 Bill Christman, PE Engineering Services manager Chelan County PUD Wenatchee, WA
Earthquake Cyprus Street Viaduct – Loma Prieta earthquake Lack of anti-burst wrapping Lack of connection between upper and lower vertical elements
Hurricane Flooding in New York from Hurricane Sandy Buildings in known flood zone – mapped before the storm
Dam failure Sayano-Shushenskaya Hydro-electric Dam, Russia - 2009 Missing head cover bolts (known) 41 of 49 bolts recovered had fatigue cracks 10 years of increasing machine vibration
Stadium collapse University of Washington - 1987 Sequencing oversight in demolition – “tiny” wires removed too soon
Bridge collapse Tacoma Narrows Bridge - 1940 Budget problems Known weaknesses
Bridge collapse I-35W Bridge in Minneapolis, Minn. - 2007 Shop drawing gusset plate omission New load w/o verifying demand/capacity ratio
Bridge collapse Lacey V. Murrow Floating Bridge across Lake Washington – 1960, above, and today, right. Manhole covers left open Big storm causes internal flooding
Sound practice Rocky Reach Dam, Columbia River, WA Post-Folsom spill gate risk reduction: Monitoring and good response to spill gate bearing wear
Sound practice Rock Island Dam, Columbia River, WA Monitoring and response to increased uplift (Decrease in foundation drainage)
Space Needle Seattle, Wash. 1961 – designed & built to withstand: 200 mph winds Magnitude 9.1 earthquake Center of gravity is 5 feet above ground level Sound practice
The higher the risk, the higher the cost No ownership in the results No link to culture and institutional knowledge
Resonance and Bridge Construction Engineers have always pushed the frontiers of bridge construction with both materials and design. Sometimes they push.
Earthquakes. Sounds of Earthquakes nds.phphttp://earthquake.usgs.gov/learning/listen/allsou nds.php.
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Bridge Engineering: Lessons from Rome to Tacoma
CASUALTY INSURERS’ TEN MOST WANTED SOLUTIONS TO REDUCE RECURRING LOSSES CASUALTY INSURERS’ TEN MOST WANTED SOLUTIONS TO REDUCE RECURRING LOSSES Walter.
Location Coal Creek upstream of Coal Creek Parkway Photo Point 5A Camera Point 5 Bearing 192 ° Goal Monitor log movement Duration 5 years Regime 2 times.
Five Places in New Yorks Hurricane Alley Association of American Geographers Spatial Thinking and Hurricanes – Module 8.
Chapter 2: Landforms of Georgia Lesson 4: How Do Humans Change Landforms? S5E1c: Students will relate the role of technology and human intervention in.
Physical Hazards. Volcanoes Igneous activity Igneous activity – Mountains where molten rock (magma) reaches the Earth’s surface and is released as lava.
Gravity retaining wall with shear damage from landslide.
Bridge Failures What if the bridges you depend upon every day collapsed because they could no longer withstand the forces of the load placed on them everyday?
Mt. Ranier Mt. Ranier is an awe-inspiring event in the Puget Sound region. Massive glaciers and vast snow fields, alpine meadows covered with wildflowers.
Earthquake Hazard and Preparedness In British Columbia
Linda Noson AGRA Earth & Environmental (425) Nonstructural Protection Guide for Schools and.
Unit 2 – Making Mountains – More Earthquakes Geosc. 10 More Earthquakes! Visit Alaska & San Francisco to get a glimpse into the effects of major earthquakes.
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