PDHonline Course C277 (4 PDH)

Dredging Methods and Equipment

2012

Instructor: John Poullain, PE

PDH Online | PDH Center5272 Meadow Estates Drive

Fairfax, VA 22030-6658Phone & Fax: 703-988-0088

www.PDHonline.orgwww.PDHcenter.com

An Approved Continuing Education Provider

www.PDHcenter.com PDH Course C277 www.PDHonlinw.org

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Dredging Methods and Equipment

GLOSSARY TERMS CALM Catenary Leg Mooring system used for dredging and transportable. Consolidation Describes the effect caused by dewatering and desiccation of dredged material

substrates, usually resulting in lessening of volume of the material. Containment Area Any site used for the temporary or permanent confinement of dredged material and

may or may not have a permanent retaining structure DPO Direct pump out from a hopper dredge or scow. DRP Dredging Research Program sponsored by USACOE. Dragline Trenching Dewatering dredged material by making trenches inside disposal sites with dragline

equipment. Eductors Hydraulic pump with no moving parts and requires clean water source unlike

submersible pumps. Hydraulic Pipeline A dredged material discharge pipeline that carries slurry material to the disposal site.

It may be floating or positioned on land. IRI Indian River Inlet used for testing evaluations of dredging and equipment. Low Wave Energy Wave energy with tidal ranges averaging 1 to 2 feet, in areas naturally or artificially

protected from the fetches and ship traffic. Monitoring The collection of physical, chemical, and environmental data to determine impacts of

dredging and dredged material disposal operations. Ocean Dumping Disposal of dredged material via barges into designated disposal sites in deep open

water. RUC Riverine utility craft for use in water and soft mud whose flotation is provided by twin

Styrofoam-filled rotors. Useful for dewatering fine-grained dredge material. Slurry A term describing the mixture of soil or sediment and water hydraulically dredged and

pumped to a disposal site. Turbidity Condition in water where high sediment loads cause clouding. May smother aquatic

vegetation.

Dredging Methods and EquipmentGLOSSARY

Containment Area Any site used for the temporary or permanent confinement of dredged material and may or may not have a permanent retaining structure

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