Dredges

& Barges

Dredges

& Barges

DredgesDredges

DredgesDredgesUsed in different mining

applicationsSand & gravel are most

commonly dredged materialsOther minerals also mined with

dredges

Dredge TypesDredge TypesSuction pumpsWith or without cutter headsClamshells & draglinesBucket ladders

Mining MethodsMining MethodsSuction material as slurry into

pipe beneath waterSlurry passes through pipe,

separated from water & transported to shore by various methods

Mining MethodsMining MethodsClamshells & draglines scoop

material & load on belt or barge

Dredge HazardsDredge HazardsDrowningSlips & fallsElectrocutionHigh pressure pumps & pipesWelding & cuttingMaterials handlingPinch points

Remove Trip HazardsRemove Trip Hazards

Electrical Hazards Around Water

Electrical Hazards Around Water

Material LoadingMaterial Loading

Material LoadingMaterial LoadingEspecially careful when loading

materials.Never go under suspended

loads

Other HazardsOther HazardsCablesHigh windsLightningFogExcessive noise

Hearing ProtectionHearing Protection

Diesel Engines

PPEPPELife jacketsSteel-toed boots with slip-

resistant solesSafety glasses or goggles Hard hat

Stored & MaintainedStored & Maintained

HardhatsHardhats

HardhatsHardhatsRequired for everyone on

board If you don’t have it on, it’s

unlikely you will go get it when needed

DrowningDrowningAccount for majority of dredge

fatalities

Life JacketsLife Jackets

Life JacketsLife JacketsWear at all times while working

on or around small boats, barges, dredges & tugboats

Jackets that keep head above water preferred

Slip & Trip HazardsSlip & Trip Hazardsmany slip & trip hazards Most serious is being caught

between barge, dock or processing plant

Trip HazardsTrip HazardsOil, grease, water, ice, loose

sand & gravelCables & unsecured linesGood housekeeping reduces

danger

Electricity & WaterElectricity & WaterCareful around electrical

installations on dredgesProvide & maintain insulation &

groundingLockout

Power CablesPower CablesFloating cables & power cables

carried on pipelines properly insulated & protected

Mechanical bonding & grounding maintained

Electrical SafetyElectrical SafetyDredges 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

Light Bulbs GuardedLight Bulbs Guarded

Electrical SafetyElectrical SafetyWeatherproof lamp socketsTemporary lights guarded, with

heavy duty cords & grounded

Pipes & PumpsPipes & PumpsHigh pressure pipes & pumps

isolated & bled before any work performed

System secured, blinded, locked & tagged until work completed

Welding & CuttingWelding & CuttingPay particular attention to

surroundingsWelded objects tested to

determine if water, flammable liquids or vapors present

Moving Heavy ObjectsMoving Heavy Objects

Moving Heavy ObjectsMoving Heavy ObjectsUse hoists or get help to

handle heavy objectsRigging contains pinch points

& done by experienced people

Wire RopeWire Rope

Wire RopeWire RopeBroken cables can whip or

backlash violently

Inspect Wire RopeInspect Wire Rope

Inspect Wire RopeInspect Wire Rope

Guard Drum & SheaveGuard Drum & Sheave

Dredge FiresDredge Fires

Dredge FiresDredge FiresExtremely dangerousGood housekeepingKeep oil, grease, waste rags,

flammables & combustibles in covered containers away from ignition sources

Fire PreventionFire PreventionStore paints, thinners &

solvents in fire cabinetsCheck for fire after welding &

cutting

Fire ExtinguishersFire Extinguishers Inspected & readily available.Trained in fire suppression

techniques

WeatherWeatherHigh winds & lightningStop work & go ashoreCreate unstable work platforms Fog & visibility

Wear Life JacketWear Life Jacket

Rescue Equipment Maintained & Accessible

Rescue Equipment Maintained & Accessible

Working AloneWorking Alone

Working AloneWorking AloneNot work alone in hazardous

areas unless they can communicate, be seen or heard by others

BargesBarges

HazardsHazardsDrowningFalling overboardSlips & fallsCrushed between barge &

dredge, dock or floating plant

PPEPPELife jacketsSteel-toed boots with slip

resistant solesSafety glasses or gogglesHardhat

Slips & FallsSlips & Falls

Trips & FallsTrips & Falls

CablesCablesPay attention around lines &

cables under tension – they can break

Loading HazardsLoading HazardsSlips & fallsRope burns from being caught

in linesCrushed between barge &

dredgeDrowningCaught in conveyor

Unloading hazardsUnloading hazardsUnloading equipment has

pinch points & blind spotsStay out of machine swing

radiusFalling material

Tow BoatsTow Boats

Tow Boat HazardsTow Boat HazardsSlips & fallsRope burns from being caught

in linesCrushed between boat & bargeDrowningExcessive noise