MECHANICAL DREDGES

Mechanical clamshell dredges are floating platforms that house a heavy-duty cycle crane which uses a wire rope suspended bucket to excavate the sea bottom. During dredging operations, the dredge secures its position by lowering retractable spud poles to the sea bottom. Excavated material is loaded into barges (scows) and transported to a disposal area with the help of a tug boat.

Mechanical Dredges

NEW YORK

Length: 200 ft (61.0 m)
Breadth: 57 ft (17.4 m)
Depth: 15 ft (4.6 m)
Draft: 7 ft (2.1 m)
Bucket Size: 12 to 24 yd³ (9 to 18 m³)
Bucket Size: 12 to 24 yd³ (9 to 18 m³)
Dig Depth Range: 3,434 hp (2,561 kW)
Total Installed Power: 3,434 hp (2,565 kW)
Fuel Capacity: 60,000 gal (227,100 l)
+ Dimensions
Length: 200 ft (61.0 m)
Breadth: 57 ft (17.4 m)
Depth: 15 ft (4.6 m)
Draft: 7 ft (2.1 m)
Bucket Size: 12 to 24 yd³ (9 to 18 m³)
+ Performance
Bucket Size: 12 to 24 yd³ (9 to 18 m³)
Dig Depth Range: 3,434 hp (2,561 kW)
+ Power Data
Total Installed Power: 3,434 hp (2,565 kW)
Fuel Capacity: 60,000 gal (227,100 l)
Mechanical Dredges

NO. 54

Length: 185 ft (56.4 m)
Breadth: 60 ft (18.3 m)
Depth: 11 ft (3.4 m)
Draft: 6.1 ft (1.9 m)
Bucket Size: 12 to 50 yd³ (9 to 38 m³)
Dig Depth Range: 74 to 150 ft (22.6 to 45.7 m)
Total Installed Power: 2,340 hp (1,745 kW)
Fuel Capacity: 39,400 gal (149,130 l)
+ Dimensions
Length: 185 ft (56.4 m)
Breadth: 60 ft (18.3 m)
Depth: 11 ft (3.4 m)
Draft: 6.1 ft (1.9 m)
+ Performance
Bucket Size: 12 to 50 yd³ (9 to 38 m³)
Dig Depth Range: 74 to 150 ft (22.6 to 45.7 m)
+ Power Data
Total Installed Power: 2,340 hp (1,745 kW)
Fuel Capacity: 39,400 gal (149,130 l)
Mechanical Dredges

NO. 53

Length: 160 ft (48.8 m)
Breadth: 60 ft (18.3 m)
Depth: 10.3 ft (3.1 m)
Draft: 6.0 ft (1.8 m)
Bucket Size: 10 to 26 yd³ (8 to 20 m³)
Dig Depth Range: 60 to 150 ft (18.3 to 45.7 m)
Total Installed Power: 2,550 hp (1,902 kW)
Fuel Capacity: 100,500 gal (380,390 l)
+ Dimensions
Length: 160 ft (48.8 m)
Breadth: 60 ft (18.3 m)
Depth: 10.3 ft (3.1 m)
Draft: 6.0 ft (1.8 m)
+ Performance
Bucket Size: 10 to 26 yd³ (8 to 20 m³)
Dig Depth Range: 60 to 150 ft (18.3 to 45.7 m)
+ Power Data
Total Installed Power: 2,550 hp (1,902 kW)
Fuel Capacity: 100,500 gal (380,390 l)
Mechanical Dredges

NO. 55

Length: 165 ft (50.3 m)
Breadth: 62 ft (19 m)
Depth: 10.5 ft (3.2 m)
Draft: 6.8 ft (2.1 m)
Bucket Size: 12 to 40 yd³ (9 to 30 m³)
Dig Depth Range: 65 to 150 ft (19.8 to 45.7 m)
Total Installed Power: 1,745 hp (1,301 kW)
+ Dimensions
Length: 165 ft (50.3 m)
Breadth: 62 ft (19 m)
Depth: 10.5 ft (3.2 m)
Draft: 6.8 ft (2.1 m)
+ Performance
Bucket Size: 12 to 40 yd³ (9 to 30 m³)
Dig Depth Range: 65 to 150 ft (19.8 to 45.7 m)
+ Power Data
Total Installed Power: 1,745 hp (1,301 kW)
Mechanical Dredges

NO. 51

Length: 155 ft (47.2 m)
Breadth: 44 ft (13.4 m)
Depth: 9 ft (2.7 m)
Draft: 6.3 ft (1.9 m)
Bucket Size: 7 to 26 yd³ (5 to 20 m³)
Dig Depth Range: 58 to 120 ft (17.7 to 36.6 m)
Total Installed Power: 1,890 hp (1,409 kW)
Fuel Capacity: 13,500 gal (51,100 l)
+ Dimensions
Length: 155 ft (47.2 m)
Breadth: 44 ft (13.4 m)
Depth: 9 ft (2.7 m)
Draft: 6.3 ft (1.9 m)
+ Performance
Bucket Size: 7 to 26 yd³ (5 to 20 m³)
Dig Depth Range: 58 to 120 ft (17.7 to 36.6 m)
+ Power Data
Total Installed Power: 1,890 hp (1,409 kW)
Fuel Capacity: 13,500 gal (51,100 l)