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.

Hopper Dredges

LIBERTY ISLAND

Length: 315 ft (96.0 m)
Breadth: 59 ft (18.0 m)
Depth: 28 ft (8.5 m)
Draft: 28.3 ft (8.6 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: 59 ft (18.0 m)
Depth: 28 ft (8.5 m)
Draft: 28.3 ft (8.6 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

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

NOON ISLAND

Length: 349.7 ft (106.6 m)
Breadth: 60 ft (18.3 m)
Depth: 31.8 ft (9.7 m)
Draft: 27.9 ft (8.5 m)
Dredging Depth: 78.7/105 ft (24/32 m) – 2 pipes
Hopper Capacity: 7,324.5 yd³ (5,600 m³)
Total Installed Power: 15,500 hp (11,558.3 kW)
+ Dimensions
Length: 349.7 ft (106.6 m)
Breadth: 60 ft (18.3 m)
Depth: 31.8 ft (9.7 m)
Draft: 27.9 ft (8.5 m)
+ Operating Perameters
Dredging Depth: 78.7/105 ft (24/32 m) – 2 pipes
Hopper Capacity: 7,324.5 yd³ (5,600 m³)
+ Machinery & Power
Total Installed Power: 15,500 hp (11,558.3 kW)
Hopper Dredges

DODGE ISLAND

Length: 281 ft (85.6 m)
Breadth: 53 ft (16.2 m)
Depth: 22 ft (6.7 m)
Draft: 19.5 ft (5.9 m)
Dredging Depth: 70 ft (21.3 m)
Hopper Capacity: 3,600 yd³ (2,754 m³)
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: 19.5 ft (5.9 m)
+ Operating Perameters
Dredging Depth: 70 ft (21.3 m)
Hopper Capacity: 3,600 yd³ (2,754 m³)
+ Machinery & Power
Total Installed Power: 9,350 hp (6,972 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: 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)
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: 19.66 ft (6.0 m)
+ Operating Perameters
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
Total Installed Power: 9,395 hp (7,006 kW)
Hopper Dredges

PADRE ISLAND

Length: 281 ft (85.6 m)
Breadth: 53 ft (16.2 m)
Depth: 21.5 ft (6.6 m)
Draft: 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)
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: 19.55 ft (6.0 m)
+ Operating Perameters
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
Total Installed Power: 9,395 hp (7,006 kW)