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Mel Price – Auxiliary Lock Downstream Miter Gate Repair

Mel Price – Auxiliary Lock Downstream Miter Gate Repair. Navigation Lock and Dam Inspection and Emergency Repairs Workshop 18 - 20 April 2006. Mel Price Locks and Dam. Project Location. Mel Price Locks and Dam. Mel Price Accident 3 October 2004. What Happened? Why Did It Happen?.

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Mel Price – Auxiliary Lock Downstream Miter Gate Repair

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  1. Mel Price – Auxiliary Lock DownstreamMiter Gate Repair Navigation Lock and Dam Inspection and Emergency Repairs Workshop 18 - 20 April 2006

  2. Mel Price Locks and Dam ProjectLocation

  3. Mel Price Locks and Dam

  4. Mel Price Accident 3 October 2004 What Happened? Why Did It Happen?

  5. Mel Price Accident What Happened?

  6. Miter Gate Functioning Normally

  7. Gate Leafs Forced Downstream From Normal Mitered Position Gates Of Normal Position

  8. Gate Leafs Forced Downstream From Normal Mitered Position

  9. Mel Price Accident Damage Summary

  10. Damage to Gate Anchorages

  11. Damage to Gate Anchorages

  12. Damage to Gate Anchorages

  13. Failed Operating Struts

  14. Diagonal Failure

  15. Damage to Miter End of Leafs

  16. Pintle Socket Sheared Off

  17. Bent & Cracked Pintle Socket

  18. Pintle Ball Retainer Sheared Off

  19. Bottom Seal Damaged

  20. Mel Price Accident Why Did It Happen?

  21. Gate Operating Arm Failure Tube

  22. Operating Arm Failure Tube Failure Bolts

  23. Failure Tube Failure Bolt Fractured Strut

  24. Normal Miter Block Position

  25. Gate Control Stations Central Control House Local Control House

  26. Magnetic Proximity Switch on Gate

  27. Switches on Machinery Rack

  28. Modification of PLC Logic

  29. Miter Gate Sill

  30. Miter Gate Sill Miter End Of Leaf Gate Stop Bottom Seal Top of Sill

  31. Investigation ReportFindings • Increased hydraulic system relief pressures and fracture of the strut failure tube failure bolts. • Leaves not mitered. • PLC programming incorrectly indicated that the downstream gate was mitered (closed). • No operator verification of miter or intervention. • Filling of lock chamber with the downstream gate leaves not in miter. • Appreciable unbalanced head on the unmitered downstream gate leaves • Catastrophic failure – miter gate leaves move past miter

  32. Actions Taken By MVS Based on Report Recommendations • Standard Operator Procedures and Training • Programming Ladder Logic Control • Additional Miter Gate Switch • Policy on Changes and Inter-Office Coordination • Relief Valve Gages and Mechanical Linkages

  33. Helper Boat – Main Lock

  34. Inspection – Main Lock

  35. All-Discipline Team

  36. Concentrate On Critical Activities

  37. Variety of Contract Instruments Best Value AE IDIQ MIPR Purchase Order Lump Sum Contract Credit Card

  38. Gate Repairs

  39. Gate Repairs Pulling Gate

  40. Position of Leafs After Accident

  41. Cutting Gate Anchors

  42. Removing Illinois Leaf Rock Island District Crane “Hercules”

  43. Placing Illinois Leaf on Spare Gate Barge

  44. Guy Cables Installed

  45. Guy Cables Installed

  46. Both Leafs Secured on Spare Gate Barge

  47. Damage Inspection

  48. Surveying Damaged Gate

  49. Survey Results – Illinois Leaf 2.21’ max deflection 2’ 1.5’ 1’ 0.5’

  50. What Do We Do Now?

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