The typical agenda of the training course includes classroom style training on the fundamentals of dredging and understanding dredging theories. The topics covered in the classroom environment include, but are not limited to:

What is a “Centrifugal Pump”?

  • Centrifugal vs. positive displacement
    • Effects on horsepower requirements vs. friction in both
  • How a centrifugal pump works
    • Front liner/impeller clearance and slurry re-circulation
    • Pre-rotation and wear
    • Proper pump impeller adjustment
    • Measuring impeller shaft endplay for preventive maintenance scheduling
    • Eye evacuation and atmospheric pressure
    • Cause and effects of pump cavitation
  • Parts of the centrifugal pump
    • Various materials used in parts and why
    • The use of 3-vane vs. 4-vane impellers
  • How to read a theoretical pump curve (TPC)
    • Head, pipeline length and terminal elevation
    • How to determine flow rate using the TPC
    • Converting flow rate into velocity
    • How to convert head to pressure
    • Determining horsepower requirement
    • Pump efficiency and how it affects horsepower requirement

Excavating System

  • Types of excavators and their advantages/disadvantages
  • How a basket cutter works
  • Why does a cutter have a variable speed control
  • Types of material and how they are classified (size)
  • Compressive strength measurements (blow counts)
  • Horsepower, torque and blade cutting forces
  • Particle size restriction (rotating suction screen)

Water & Slurry

  • Description of heterogeneous flow
  • Velocity vs. turbulence with respect to pipe size
  • Velocity requirements for various size material
  • Pipeline size, velocity, friction, and production
  • What is critical settling velocity?
  • Suction dilution valve principles

Lever Room

  • Typical lever room gauge layout
  • Reading gauges and what they say to you
  • Gauge readings of a plugged discharge
  • Gauge readings of a plugged suction
  • Gauge readings of a ladder grounding condition
  • Gauge readings of maximum possible production rate
  • Various instruments (suction dilution valves, flow meters, mass measurement, etc.)
  • Touch-screen data

Project Planning

  • Why project plans are important
  • Example of a typical project plan

Dredging Techniques

  • Range diagram examples
  • Building a face
  • Advancing the cut
  • Ladder grounding
  • What in-situ means
  • Sub-surface material characteristics (fluidized material)
  • Free-flowing material vs. consolidated material
  • The danger of a collapsing bank
  • Atmospheric (barometric) restrictions and why

Booster Pumping

  • When is it necessary
  • Principles of booster pumping
  • Discharge head and pressures

Training Materials

  • TPC examples
  • Settling velocity chart
  • Glossary of terms
  • HDPE & steel pipe size chart
  • Dredge pump assembly drawing

Each training class DSC conducts has a flexible agenda and format that may be changed, depending on the scope and need of the training session. This ensures that the training class is tailored to fit your needs. Class participants are encouraged to ask questions throughout the training process to ensure that training needs of the individual are properly addressed.