Dredges

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Dredges Barges
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Dredges
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Dredges

• Used in different mining applications
• Sand gravel are most commonly dredged materials
• Other minerals also mined with dredges

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Dredge Types

• Suction pumps
• With or without cutter heads
• Clamshells draglines
• Bucket ladders

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Mining Methods

• Suction material as slurry into pipe beneath
  water
• Slurry passes through pipe, separated from water
  transported to shore by various methods

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Mining Methods

• Clamshells draglines scoop material load on
  belt or barge

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Dredge Hazards

• Drowning
• Slips falls
• Electrocution
• High pressure pumps pipes
• Welding cutting
• Materials handling
• Pinch points

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Remove Trip Hazards
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Electrical Hazards Around Water
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Material Loading
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Material Loading

• Especially careful when loading materials.
• Never go under suspended loads

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Other Hazards

• Cables
• High winds
• Lightning
• Fog
• Excessive noise

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Hearing Protection

• Diesel Engines

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PPE

• Life jackets
• Steel-toed boots with slip-resistant soles
• Safety glasses or goggles
• Hard hat

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Stored Maintained
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Hardhats
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Hardhats

• Required for everyone on board
• If you dont have it on, its unlikely you will
  go get it when needed

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Drowning

• Account for majority of dredge fatalities

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Life Jackets
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Life Jackets

• Wear at all times while working on or around
  small boats, barges, dredges tugboats
• Jackets that keep head above water preferred

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Slip Trip Hazards

• many slip trip hazards
• Most serious is being caught between barge, dock
  or processing plant

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Trip Hazards

• Oil, grease, water, ice, loose sand gravel
• Cables unsecured lines
• Good housekeeping reduces danger

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Electricity Water

• Careful around electrical installations on
  dredges
• Provide maintain insulation grounding
• Lockout

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Power Cables

• Floating cables power cables carried on
  pipelines properly insulated protected
• Mechanical bonding grounding maintained

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Electrical Safety

• Dredges with on board power plants differ from
  those with shore power because vessels hull used
  as neutral or ground return
• Employee unfamiliar with marine electrical
  circuitry not allowed to work equipment

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Light Bulbs Guarded
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Electrical Safety

• Weatherproof lamp sockets
• Temporary lights guarded, with heavy duty cords
  grounded

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Pipes Pumps

• High pressure pipes pumps isolated bled
  before any work performed
• System secured, blinded, locked tagged until
  work completed

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Welding Cutting

• Pay particular attention to surroundings
• Welded objects tested to determine if water,
  flammable liquids or vapors present

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Moving Heavy Objects
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Moving Heavy Objects

• Use hoists or get help to handle heavy objects
• Rigging contains pinch points done by
  experienced people

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Wire Rope
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Wire Rope

• Broken cables can whip or backlash violently

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Inspect Wire Rope
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Inspect Wire Rope
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Guard Drum Sheave
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Dredge Fires
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Dredge Fires

• Extremely dangerous
• Good housekeeping
• Keep oil, grease, waste rags, flammables
  combustibles in covered containers away from
  ignition sources

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Fire Prevention

• Store paints, thinners solvents in fire
  cabinets
• Check for fire after welding cutting

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Fire Extinguishers

• Inspected readily available.
• Trained in fire suppression techniques

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Weather

• High winds lightning
• Stop work go ashore
• Create unstable work platforms
• Fog visibility

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Wear Life Jacket
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Rescue Equipment Maintained Accessible
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Working Alone
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Working Alone

• Not work alone in hazardous areas unless they can
  communicate, be seen or heard by others

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Barges
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Hazards

• Drowning
• Falling overboard
• Slips falls
• Crushed between barge dredge, dock or floating
  plant

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PPE

• Life jackets
• Steel-toed boots with slip resistant soles
• Safety glasses or goggles
• Hardhat

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Slips Falls
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Trips Falls
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Cables

• Pay attention around lines cables under tension
  they can break

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Loading Hazards

• Slips falls
• Rope burns from being caught in lines
• Crushed between barge dredge
• Drowning
• Caught in conveyor

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Unloading hazards

• Unloading equipment has pinch points blind
  spots
• Stay out of machine swing radius
• Falling material

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Tow Boats
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Tow Boat Hazards

• Slips falls
• Rope burns from being caught in lines
• Crushed between boat barge
• Drowning
• Excessive noise