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“By Trial and Error”

“By Trial and Error”. Why do we say that?. FA in Business?. When Toyotas Fail……. Drive it back to root cause!. Sports?. Medicine?. We’re nominating you for the Darwin Award!. A 48” culvert plugs on an abandoned road. Why do we respond?. Did not pay your electric bill?.

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“By Trial and Error”

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  1. “By Trial and Error” Why do we say that?

  2. FA in Business?

  3. When Toyotas Fail…… Drive it back to root cause!

  4. Sports?

  5. Medicine?

  6. We’re nominating you for the Darwin Award!

  7. A 48” culvert plugs on an abandoned road

  8. Why do we respond? Did not pay your electric bill?

  9. A 48” culvert plugs on an abandoned road

  10. Stream diverts 200 ft down the road

  11. …initiates a new landslide.

  12. …a key watershed with Chinook coho, and steelhead. …mobilized approximately 200,000 yd3and delivered 50% to Bluff Creek...

  13. The Cost of No Maintenance This road was built in 2001 for approximately $750,000

  14. The Future? Level 1 and 2 roads are roughly 60% of our total road miles.

  15. Monitoring Road-Watershed Performance Suggested Initiative for Monitoring: Combine effort to complete DSRs and INFRA to achieve road performance monitoring

  16. Roads are a focus of watershed monitoring • But roads vary greatly in performance • Most do not fail • Failures tend to cluster in areas of inherent instability

  17. Why? • Failure sites create a useful dataset for defining road performance through time • Failures define the limits of practice in various landscape situations • When experienced road managers retire, mission-critical knowledge could be conserved

  18. Why? • Little added effort for substantial value returned • INFRA in place and working • DSRs completed • Related monitoring

  19. What you get • Ability to determine thresholds of performance • Ability to determine relative risk of failure • Quantitative description of risks

  20. Failure Rate vs Distance from Stream

  21. Failure Rate vs Slope Class

  22. Slope Position vs Failure Rate

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