CURENT DREDGING INDUSTRY TECHNOLOGIES PERTAINING TO PIPELINE TRANSPORT

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CURENT DREDGING INDUSTRY TECHNOLOGIES PERTAINING
TO PIPELINE TRANSPORT
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METHODOLOGY

• The System of Principles, Practices, and
  Procedures Employed by a Discipline

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WE MEANS THE INDUSTRY
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BENEFICIAL USESOF DREDGED MATERIAL

• Coastal Restoration
• Wetland Creation
• Barrier Island Restoration
• Beach Nourishment
• Bird Island Development
• Maritime Forest/Chenier Ridge Development
• Sub-tidal Habitat Enhancement
• Development
• Roadway Base Creation
• Marinas/Residential Communities
• Industrial Waterside Facilities

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BENEFICIAL USES PLACEMENT

• Placement Modes
• Confined Placement
• Simi-confined placement
• Open Water Placement
• Placement Measures
• Use of Existing Emergent Land Features
• Earthen Dikes
• Rock Enclosures
• Geotubes
• Access Channels

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SOURCES OF MATERIAL IN COASTAL LOUISIANA

• Dedicated Borrow
• Mississippi River
• Offshore - Gulf of Mexico
• Interior Bay/Lake Bottoms
• Channel Maintenance Materials

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DREDGED MATERIALS TYPES

• Consistency
• Sand
• Silt
• Clay
• Disposition
• Virgin Material
• Maintenance Material
• Dredge-ability
• Silts and Clays
• Unconsolidated Fluff
• Consolidated True Bottom
• Sands
• Loose
• Hard Packed

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SEDIMENT HANDLING LOGISTICS

• Ingress route planning/execution
• Materials single-handling
• Direct Pump Via Pipeline
• Pump Power-Boosters
• Pipeline Acquisition/Assembly/Maintenance
• Spread Material as Fill Advances
• Materials Re-handling
• Excavation / Stockpile
• Excavate and Deliver With Large Pipeline
• Excavate and Deliver With Hoppers
• Excavate and Deliver With Scows
• Re-Slurry and Discharge Into Final Area

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MECHANICAL GRAB
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HOPPER DREDGES
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PIPELINE DREDGES
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PARTS OF THE PIPELINE SYSTEM

• Suction
• Pumps
• Pipeline

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SUCTION

• Dustpan
• Cutter lt 75
• Open Suction - Deep Digging

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PUMPS

• Long Line High PSI
• Large Discharge Diameter High Horsepower

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PIPELINE

• Near the Dredge

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PIPELINE

• Fixed
• Access Canal
• Install
• Roll
• Wear

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PIPELINE

• Near The Discharge
• Flexibility
• Plastic
• Spray

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PRODUCTION FACTORS
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GRAIN SIZE

• 200 Micron Sand 15 fps

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PIPELINE DIAMETER

• Psi/Ft of Line
• Head Loss/Foot of Line Goes Down as Pipeline
  Diameter Increases.
• 30 Pipe 100
• 24 Pipe 129
• 36 Pipe 81
• Hp/Ft of Line
• Horsepower/Foot of Line Goes Up as Pipeline
  Diameter Increases.
• 30 Pipe 100
• 24 Pipe 64
• 36 Pipe 144

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PIPELINE LENGTH

• For a Fixed Psi, Discharge Distance Varies With
  Pipeline Diameter
• 30 Pipe 100
• 24 Pipe 78
• 36 Pipe 124

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HORSEPOWER

• For a Fixed HP, Discharge Distance Varies With
  Pipeline Diameter
• 30 Pipe 100
• 24 Pipe 156
• 36 Pipe 69

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MATERIAL IN PIPELINE

• Horsepower Left Over After Pumping Water, Can
  Pump Sand

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OPERATIONAL FACTORS

• Face
• Twice the Size of the Cutter
• Minimize Dredge Travel
• Fill
• Access to Pipeline and Boosters
• Fuel
• Repairs
• Roll Pipe
• Weather
• Currents
• Low Tide

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PLAQUEMINES PARRISH POSSIBILITIES
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COST FACTORS

• Dredge 20,000
• Boosters 20,000
• Pipeline Installation Marsh
• Wear (4 Quadrants) 12 MCY
• Fill Spread

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HAUL

• Dredge
• Unloader 20,000
• Pipeline Installation Marsh
• Transport 30 Miles
• Fill Spread

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INDUSTRY PERFORMANCE HISTORY
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SUMMARY

• Dredge Type Dependant On
• Working Conditions
• Material Type / Dredge-ability
• Dredging Quantity
• Conveyance Distance
• Placement Mode
• Bid Competitiveness Dependant On
• Well Defined Existing Conditions
• Long Lead Times / Contract Durations
• Clear Measurement Payment Criteria
• Industry Interest Will Be a Function of Size and
  Frequency of Available Work