TRAILING SUCTION HOPPER DREDGES

Hopper dredges are designed to vacuum material from the sea floor through drag arms that load the material into the hold of the vessel. The cargo of mud, or sand, can then be transported to either an ocean disposal site, where the material is dropped to the bottom through openings in the bottom of the hull, or at an upland site such as a beach, or reclamation, where the material is pumped ashore by the ship. This method is most suited when excavating loose material from open areas for delivery to a distant disposal location. These vessels are generally certified to sail in coastal or ocean waters and are suited for working in rougher sea conditions beyond those suitable for other dredging plants.

Ellis Island

ELLIS ISLAND


Length: 480 ft (146.3 m)
Breadth: 92 ft (28 m)
Depth: 36 ft (11 m)
Draft: 30 ft (9.2 m)
Dredging Depth: 122 ft (37.2 m)
Suction Diameter: 2 @ 36 in (914.4 mm)
Discharge Diameter: 34 in (863.6 mm)
Hopper Capacity: 14,800 yd³
Propulsion Power (free sailing): 13,404 hp (9,995.4 kW)
Dredge Pump Power: 10,000 hp (7,457 kW)
Total Installed Power: 28,625 hp (21345.7 kW)
+ Dimensions
Length: 480 ft (146.3 m)
Breadth: 92 ft (28 m)
Depth: 36 ft (11 m)
Draft: 30 ft (9.2 m)
+ Operating Parameters
Dredging Depth: 122 ft (37.2 m)
Suction Diameter: 2 @ 36 in (914.4 mm)
Discharge Diameter: 34 in (863.6 mm)
Hopper Capacity: 14,800 yd³
+ Machinery and Power
Propulsion Power (free sailing): 13,404 hp (9,995.4 kW)
Dredge Pump Power: 10,000 hp (7,457 kW)
Total Installed Power: 28,625 hp (21345.7 kW)
Hopper Dredges

LIBERTY ISLAND

Coast Guard Inspected

Length: 315 ft (96.0 m)
Breadth: 29 ft (8.8 m)
Depth: 28 ft (8.5 m)
Draft: 25.5 ft (7.8 m)
Dredging Depth: 108 ft (32.9 m)
Suction Diameter: 31.5 in (800 mm)
Discharge Diameter: 30 in (762 mm)
Hopper Capacity: 6,540 yd³ (5,003 m³)
Total Installed Power: 16,566 hp (11,612 kW)
+ Dimensions
Length: 315 ft (96.0 m)
Breadth: 29 ft (8.8 m)
Depth: 28 ft (8.5 m)
Draft: 25.5 ft (7.8 m)
+ Operating Parameters
Dredging Depth: 108 ft (32.9 m)
Suction Diameter: 31.5 in (800 mm)
Discharge Diameter: 30 in (762 mm)
Hopper Capacity: 6,540 yd³ (5,003 m³)
+ Machinery and Power
Total Installed Power: 16,566 hp (11,612 kW)
Hopper Dredges

TERRAPIN ISLAND

Coast Guard Inspected

Length 315.6 ft (96.2 m)
Breadth 68.4 ft (20.8 m)
Depth 24.2 ft (7.4 m)
Draft 22.3 ft (6.8 m)
Dredging Depth: 70+ ft (21.3+ m)
Suction Diameter: 33.5 in (851 mm)
Discharge Diameter: 33.5 in (851 mm)
Hopper Capacity: 6,400 yd³ (4,893 m³)
Total Installed Power: 15,206 hp (11,344 kW)
+ Dimensions
Length 315.6 ft (96.2 m)
Breadth 68.4 ft (20.8 m)
Depth 24.2 ft (7.4 m)
Draft 22.3 ft (6.8 m)
+ Operating Parameters
Dredging Depth: 70+ ft (21.3+ m)
Suction Diameter: 33.5 in (851 mm)
Discharge Diameter: 33.5 in (851 mm)
Hopper Capacity: 6,400 yd³ (4,893 m³)
+ Machinery and Power
Total Installed Power: 15,206 hp (11,344 kW)
Hopper Dredges

DODGE ISLAND

Coast Guard Inspected

Length: 281 ft (85.6 m)
Breadth: 53 ft (16.2 m)
Depth: 22 ft (6.7 m)
Draft Light: 9.5 ft (2.9 m)
Draft Loaded: 19.5 ft (5.9 m)
Dredging Depth: 70 ft (21.3 m)
Hopper Capacity: 3,600 yd³ (2,754 m³)
Propulsion Power: 4,350 hp (3,244 kW)
Dredge Pump Power 1,700 hp (1,267 kW)
Total Installed Power: 9,350 hp (6,972 kW)
+ Dimensions
Length: 281 ft (85.6 m)
Breadth: 53 ft (16.2 m)
Depth: 22 ft (6.7 m)
Draft Light: 9.5 ft (2.9 m)
Draft Loaded: 19.5 ft (5.9 m)
+ Operating Parameters
Dredging Depth: 70 ft (21.3 m)
Hopper Capacity: 3,600 yd³ (2,754 m³)
+ Machinery & Power
Propulsion Power: 4,350 hp (3,244 kW)
Dredge Pump Power 1,700 hp (1,267 kW)
Total Installed Power: 9,350 hp (6,972 kW)
Hopper Dredges

PADRE ISLAND

Coast Guard Inspected

Length: 281 ft (85.6 m)
Breadth: 53 ft (16.2 m)
Depth: 21.5 ft (6.6 m)
Draft Light: 9.5 ft (2.9 m)
Draft Loaded: 19.55 ft (6.0 m)
Dredging Depth: 70 ft (21.3 m)
Suction Diameter: 27 in (686 mm)
Discharge Diameter: 24 in (610 mm)
Hopper Capacity: 3,600 yd³ (2,754 m³)
Propulsion Power: 3,000 hp (2,237 kW)
Total Installed Power: 9,395 hp (7,006 kW)
+ Dimensions
Length: 281 ft (85.6 m)
Breadth: 53 ft (16.2 m)
Depth: 21.5 ft (6.6 m)
Draft Light: 9.5 ft (2.9 m)
Draft Loaded: 19.55 ft (6.0 m)
+ Operating Parameters
Dredging Depth: 70 ft (21.3 m)
Suction Diameter: 27 in (686 mm)
Discharge Diameter: 24 in (610 mm)
Hopper Capacity: 3,600 yd³ (2,754 m³)
+ Machinery & Power
Propulsion Power: 3,000 hp (2,237 kW)
Total Installed Power: 9,395 hp (7,006 kW)
Hopper Dredges

SUGAR ISLAND

Length: 281 ft (85.6 m)
Breadth: 53 ft (16.2 m)
Depth: 21.5 ft (6.6 m)
Draft Light: 9.5 ft (2.9 m)
Draft Loaded: 19.66 ft (6.0 m)
Dredging Depth: 70 ft (21.3 m)
Suction Diameter: 27 in (686 mm)
Discharge Diameter: 24 in (610 mm)
Hopper Capacity: 3,600 yd³ (2,754 m³)
Propulsion Power: 4,350 hp (3,244 kW)
Dredge Pump Power 1,700 hp (1,267 kW)
Total Installed Power: 9,395 hp (7,006 kW)
+ Dimensions
Length: 281 ft (85.6 m)
Breadth: 53 ft (16.2 m)
Depth: 21.5 ft (6.6 m)
Draft Light: 9.5 ft (2.9 m)
Draft Loaded: 19.66 ft (6.0 m)
+ Operating Parameters
Dredging Depth: 70 ft (21.3 m)
Suction Diameter: 27 in (686 mm)
Discharge Diameter: 24 in (610 mm)
Hopper Capacity: 3,600 yd³ (2,754 m³)
+ Machinery & Power
Propulsion Power: 4,350 hp (3,244 kW)
Dredge Pump Power 1,700 hp (1,267 kW)
Total Installed Power: 9,395 hp (7,006 kW)