Low-Level Conduits – What Can Go Wrong, How to Inspect, How to Repair?: Agenda
  • Introduction of Presenters
    • Joseph (Joe) Monroe, PE
  • Definitions
    • What dams fail
    • What reasons are associated with conduits
    • Inlet (Cast-in-place versus pre-cast)
    • Conduit (Cast-in-place versus pre-cast)
    • Terminal Structure
  • Inspections -Conduits
    • External – what to look for
    • Internal – what to look for
  • Maintenance vs Repair
    • Owner Performed Maintenance
    • Engineer Required Rehabilitation/Repair
  • Items Requiring Repair - Conduits
    • Hydraulic considerations
    • Structural
    • Settlement
    • Joint integrity
    • Seepage
  • ‘Traditional’ Rehabilitation Alternatives - Conduits
    • Spot Repair
    • Slip-line and grouting of annular space
    • Excavate and replace
    • Permanent abandonment by grouting and construct new spillway
      • Siphon
      • Riser and conduit through/near base of dam
      • Short riser with elevated conduit in embankment
  • ‘Non-traditional’ Rehabilitation Alternatives - Conduits
    • Spin casting
    • Cured in-place liners
  • Design References
    • USACE
    • USBR
    • NRCS/SCS
    • FEMA
    • Other
  • Review
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