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Literature Review & Summary Report Design Basis Memorandum St. Johns River Water Management District Contract # SK940AA

BCI Project No. 19-15089 September 2007 Page 37

ID&D® – Integrated Dredging & Dewatering

1) Continuous process - Dredging through dewatering is one integrated system 2) No need for settling basins - Eliminates berm, return water systems and containment area restoration 3) Eliminates long pipelines and boosters 4) Processes a variety of materials - Handles a wide variety of sediment types, grain sizes and debris 5) Highly automated - Due to computerization, only two people are needed to operate dewatering system 6) Optimizes polymer consumption - Computer controlled polymer addition is integrated with real-time measurement of solids content of the dredge slurry 7) Low turbidity of return water, water returned directly to waterway or used as process water 8) Environmentally sensitive - All equipment, systems, and materials are designed to be environmentally sensitive. 9) Dewatered material is stackable & available immediately - Ready for beneficial use, recycling, treatment, packaging, transport and/or disposal 10) Streamlines agency permitting - Eliminates groundwater mounding and return water issues

1) Unit costed and processed material is substantially higher than other less technically intensive options. 2) Potential mechanical breakdowns due to many unit processes

EAGLE NORTH AMERICA Extended Contracting Service

Most of Eagle North America’s dewatering services are performed using belt press technology, but dewatering is customized for the client using the most suitable technologies including:

1) Unit costed and processed material is substantially higher than other less technically intensive options. 2) Potential mechanical breakdowns due to many unit processes

High pressure belt press Centrifuge Plate and frame filter press Screw press Grinders, screens, hydrocyclones, tanks Geotube technology Each project may also be customized to include required processes such as screening, thickening, sand removal, washing, and drying. Eagle North America’s portable units are skid mounted to allow for easy transport and quick configuration, and all skids feature new equipment rather than reconditioned equipment.

Disadvanta ges

INTEGRATED SYSTEMS

Eagle North America

Classification

INTEGRATED SYSTEMS

Table 3 Continued Dewatering Technologies Advantages and Disadvantages

Vendor

Type

Advantages

J.F. Brennan Co., Inc.

PHOENIX Process Equipment Co.

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