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Mel Price – Auxiliary Lock Downstream Miter Gate Repair

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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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Presentation Transcript
mel price auxiliary lock downstream miter gate repair
Mel Price – Auxiliary Lock DownstreamMiter Gate Repair

Navigation Lock and Dam Inspection and Emergency Repairs Workshop 18 - 20 April 2006

mel price accident 3 october 2004

Mel Price Accident 3 October 2004

What Happened?

Why Did It Happen?

mel price accident

Mel Price Accident

What Happened?

mel price accident1

Mel Price Accident

Damage Summary

mel price accident2

Mel Price Accident


Did It Happen?

gate operating arm
Gate Operating Arm

Failure Tube

failure tube
Failure Tube

Failure Bolt

Fractured Strut

central control house

Gate Control Stations

Central Control House

Local Control House

miter gate sill1
Miter Gate Sill

Miter End

Of Leaf

Gate Stop

Bottom Seal

Top of Sill

investigation report findings
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
actions taken by mvs based on report recommendations
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
variety of contract instruments
Variety of Contract Instruments

Best Value



Purchase Order

Lump Sum Contract

Credit Card

gate repairs1
Gate Repairs

Pulling Gate

removing illinois leaf
Removing Illinois Leaf

Rock Island District

Crane “Hercules”


Survey Results – Illinois Leaf

2.21’ max






panel of experts
Panel of Experts
  • Retired construction and operations personnel from USACE (Similar Failure At Bankhead)
  • Steel structures engineering experts from various universities
  • Heat straightening expert
  • Structural engineers from other USACE offices
  • St. Louis District structural engineers, lock operations personnel and Rivers Project Office personnel
conclusions from panel of experts
Conclusions From Panel of Experts
  • Gate could be repaired
  • Repair would be quicker than replacement
  • Heat straightening could be used
  • Leafs should be layed down for repairs
gate repairs2
Gate Repairs

Laying Leafs Down


Shreve Moving Leaf For Lay Down

“Louisville” District

Crane “Shreve”


In Position for Laydown

Crane Barge Sewell Winch Used to Initiate Rotation

gate repairs3
Gate Repairs

Heat Straightening

support condition for checking straightness
Support Condition For Checking Straightness

Two Support Columns

On Bottom Girder

Single Support

On Top Girder

gate repairs4
Gate Repairs

Structural Repairs


Castings Supplied By Rock Island Arsenal

Anchor Bars

And Gudgeon Barrels

Pintle Sockets