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Dam Safety Case History

Dam Safety Case History. Columbia Lock and Dam March 8, 1997. “A number of courageous people worked in sometimes dangerous circumstance to perform their missions. We are grateful that throughout all of this no one was injured and we were all successful in our efforts.”

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Dam Safety Case History

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  1. Dam Safety Case History Columbia Lock and Dam March 8, 1997 “A number of courageous people worked in sometimes dangerous circumstance to perform their missions. We are grateful that throughout all of this no one was injured and we were all successful in our efforts.” CCHamby 97

  2. Location Map 2 • Felsenthal L&D • Thatcher L&D • Columbia L&D • Jonesville L&D

  3. Columbia L & D Descript 84’ x 600’ Lock 200’ Wide Navigation Pass Miter Gate Flow 4@50’ Wide Tainter Gates West Abutment Guide Wall

  4. The Accident

  5. 8 March 97 Columbia Lock and Dam 9pm

  6. Columbia Lock and Dam

  7. Columbia Lock and Dam

  8. Columbia Lock and Dam

  9. Columbia Lock and Dam 10pm

  10. 9 March 97 Columbia Lock and Dam 1am

  11. Columbia Lock and Dam

  12. Columbia Lock and Dam 2:45am

  13. Columbia Lock and Dam 6am

  14. 10 Mar 97 Photo Barge in Gate 1 • photo

  15. 10 Mar 97 Photo Barge in Gate 1

  16. Photo Barge in Gate 1

  17. Gate 1 Damage

  18. 11 Mar 97 Barge Removed from Gate 1 • photo

  19. Barge Removed

  20. Identifying the Problems • Remove Two Sunken Barges • Damaged & Inoperable Tainter Gate • Too Much Flow thru the Nav Pass • The River Forecast is Bad News • There is no heavy equipment upstream

  21. Lock Underwater • ___ photo fig II-1 (where is the lock?)

  22. Highway Barriers Lock Underwater • ___ photo fig II-2 Lock Chamber Miter Gate

  23. Highway Barriers • Borrow from LADOTD

  24. Highway Barriers • ___ photo fig II-3

  25. Highway Barriers • ___ photo fig II-4

  26. Miter Gate Extension • Designed and Built Wooden Extension • __photo fig II-5

  27. Miter Gate Extension Fig II-6 9 Apr Timber over miter gate and barriers along the wall

  28. Operating the Lock • __photo fig II-7 opening the gate valves

  29. Passing the Salvage Derrick Barge • __photo fig II-8 derrick barge goes through the lock

  30. Salvage Ops • Orientation of barges fig IV-2

  31. Salvage Ops • ___ fig IV-1

  32. Salvage Ops – Ent Pipe Sktch • Sketch diver going through the pipe to cut holes

  33. Salvage Ops – Ent Pipe Phot0 • ___ figs IV-3 pipe in water

  34. Salvage Ops - Diver • Photo diver going through the pipe to cut holes

  35. Salvage Ops - Tender • Photo diver going through the pipe to cut holes

  36. Salvage Ops - Spectators • TV Media • Spectators photo

  37. Salvage Ops – Barge Exposed • ___ figs IV-4

  38. Salvage Ops – Barge Rising • ___ figs IV-4

  39. Salvage Ops – Barge Raised • ___ figs IV-4

  40. Salvage Ops- Chain Connection • ___ figs IV-x

  41. Stone Repairs Sketch 1 • Show plan view sketch of all holes

  42. Stone Repairs Sketch guideWx

  43. Stone Repairs Sketch tainterx

  44. Stone Repair Photo new stone

  45. Stone Repair Photo drop stone

  46. Stone Repairs Sketch US fix x

  47. Stone Repairs Sketch nav x

  48. Navigation Pass Flow • __photo fig II-10 water thru nav pass 9Apr • add sound from VHF tape

  49. Navigation Pass Damage • __photo fig II-10 9 Apr • Additional Surveys made after river slowed down • Slab fell into the hole (show 3D survey or fig III-10) • Show cross section with hole and stability prob

  50. Stone Repairs Sketch nav orig

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