Introduction to Spillway Gates: Agenda

May 11, 2021
12:00 pm - 2:00 pm Eastern

  • Introduction
    • Overview of the seminar
      • Key items discussed will include the following:
      • Gate types
      • Gate inspection 
      • Gate analysis
      • Typical gate repairs
      • Gate replacement
      • Gate testing 
      • Removing gates from service 
  • Gate types
    • Provide a brief discussion of the following gate types
      • Tainter or Radial Gates 
      • Crest Gates
      • Vertical Lift Gates
      • Bascule or Hydraulic Gates
      • Bear Trap Gates
    • Cover different types of gate material and the impact on the gates including the following:
      • Carbon Steel 
      • Corten Steel 
    • Coatings
      • Original Lead Paint (testing and containment)
      • Standard Protective Coatings
      • Metalizing
  • Gate Inspection
    • Items to be discussed include:
      • Visual inspection
      • Detailed climbing inspection 
      • Dewatering the gate and performing an inspection
      • What measurements can and should be taken
    • Issues Discovered
      •    Before and after coating removal
      •    Before and after seal removal
      •    Other issues impacting gate operation
  • Gate Analysis
    • Provide a general discussion of what is included in analysis of a gate including the following:
      • Modeling (software and techniques)
      • Trunnion pin friction (Folsom Dam)
      • Measuring Friction
    • Discuss hoist equipment and how it needs to be considered in a comprehensive analysis and repair project
      • Equipment condition inspections and testing
      • Load rating evaluations (potential new loads from updated criteria)
  • Gate Repairs
    • Provide some examples of 
      • Member stiffening
      • Member replacement
      • Skinplate pitting filler material
      • Patching with plates 
      • Weld metal repair
    • Discuss other items of repair
      • Drain Hole enlargement
      • Trunnion Pin Replacement
      • Trunnion Anchorage Replacement
      • Cable hitch replacement
      • Wire Rope Replacement
      • Rebalancing Gates/load tests
  • Gate Replacement
    • Evaluation of age and condition
    • Evaluation of added weight and impacts on hoist equipment
  • Gate Testing
    • Corps of Engineers Recommendations
    • Bureau of Reclamation Recommendation
  • Removing Gates from Service
    • Why remove gates from service
    • What are some ways to remove gates from service
      • Labyrinth Weirs
      • Piano Key Weirs
      • Other options
         
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