1 / 42

1998 Kelso, Washington, Landslide

1998 Kelso, Washington, Landslide. Second largest suburban landslide in U.S. history Exceptionally unstable geology Troutdale Formation overlies Cowlitz Formation The contact is a potential failure surface FEMA -funded buy-out 137 homes damaged to some extent

baker-york
Download Presentation

1998 Kelso, Washington, Landslide

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. 1998 Kelso, Washington, Landslide • Second largest suburban landslide in U.S. history • Exceptionally unstable geology • Troutdale Formation overlies Cowlitz Formation • The contact is a potential failure surface • FEMA-funded buy-out • 137 homes damaged to some extent • 127 homes to be purchased • Owners paid a maximum of 37.5% of house value

  2. Kelso, WA Landslide: Locator Map

  3. Kelso, WA Landslide: Overview

  4. Upper Aldercrest: A Down-Scarp View

  5. Upper Aldercrest: Small Scarp

  6. Upper Aldercrest: A Plumb Well

  7. Upper Aldercrest: Hanging Driveway

  8. Upper Aldercrest: Downdropped House

  9. Upper Aldercrest: Separated Section

  10. Upper Aldercrest: Part of the Driveway

  11. Upper Aldercrest: Rotated Structures

  12. Upper Aldercrest: Hanging Structure

  13. Upper Aldercrest: Missing Foundation

  14. Upper Aldercrest: Separated Section

  15. Upper Aldercrest: Torn & Twisted

  16. Upper Aldercrest: Separated Masonry

  17. Upper Aldercrest: An Abrupt Scarp

  18. Upper Aldercrest: Hanging Roof

  19. Upper Aldercrest: Tilted Plumb Well

  20. Lower Aldercrest: Temporary Water

  21. Lower Aldercrest: Moderate Movement

  22. Lower Aldercrest: New Tension Crack

  23. Lower Aldercrest: Side-Slope Shifting

  24. Lower Aldercrest: Detached Garage

  25. Lower Aldercrest: Unwanted Sunroom

  26. Lower Aldercrest: A New Entryway

  27. Lower Aldercrest: Minor Shifting

  28. Lower Aldercrest: Natural “Tea”

  29. Lower Aldercrest: Offset Curbing

  30. Lower Aldercrest: Lowered Basket

  31. Lower Aldercrest: Parallelogram Shift

  32. Lower Aldercrest: Hold-Out Resident

  33. Lower Aldercrest: Pressure Ridge

  34. Lower Aldercrest: New Scarp

  35. Lower Aldercrest: Halted Construction

  36. Lower Aldercrest: Lateral Shift

  37. Lower Aldercrest: Lateral Shift Detail

  38. Lower Aldercrest: Tension Cracks

  39. Lower Aldercrest: Makeshift Roadway

  40. Lower Aldercrest: Parallelogram #2

  41. Lower Aldercrest: First Floor Damage

  42. Lower Aldercrest: A Side View

More Related