GLDD designs and build specialty equipment to either enhance or address special requirements of clients. Some ideas involve adaptation or improvement of existing technology, other ideas may involve development of completely new technology. Among the auxiliary equipment used by GLDD are:
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Material barges carry dredged material loaded into them by bucket or cutter suction dredges. GLDD has nineteen such barges ranging from 1,540 to 7,100 yd³ (1,180 to 5,430 m³)
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Drillboats, which fragment rock with explosives prior to removal by bucket or cutter suction dredge. The company has two state of the art drillboats.
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Booster pumps, of which the company has seven, provide auxiliary power to extend the distance the company's fleet of cutter suction dredges and trailing suction hopper dredges can pump dredged material. They range in power from 3,600 to 14,400 hp (2,685 to 10,830 kW).
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Spider barges, which are used to load barges with material being pumped by a cutter suction dredge. There are currently three spider barges in the Great Lakes fleet.
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Hydraulic Unloaders are used to rehandle material from a hopper barge to an upland disposal site. GLDD currently has one of these units.
| BOOSTER/TRANSFER STATION LONG ISLAND |
| Dimensions |
| | Length: | 510 ft |
| | Breadth: | 75 ft |
| | Depth: | 31.5 ft |
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| Operating Parameters |
| | Hopper Capacity: | 16,080 cubic yards (12,294 cubic meters) |
| | Discharge Diameter: | 30 in (762 mm) |
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| Machinery & Power |
| | Main Pump Power: | 11,900 hp (8,877 kW) |
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| HYDRAULIC UNLOADER NO. 2 |
| Dimensions |
| | Length: | 112 ft (34 m) |
| | Breadth: | 50 ft (15 m) |
| | Depth: | 12 ft (3.5 m) |
| | Draft: | 7.5 ft (2.3 m) |
| | Overall Length: | 155 ft (47 m) |
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| Operating Parameters |
| | Suction Diameter: | 24 in (610 mm) |
| | Discharge Diameter: | 24 in (610 mm) |
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| Machinery & Power |
| | Total Installed Power: | 6,800 hp (5,060 kW) |
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| SPIDER BARGES |
| Dimensions |
| | Three Spider Barges: | No. 175, No. 181, No. 183 |
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| Operating Parameters |
| | Discharge Diameter: | 30 in (762 mm) |
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| Machinery & Power |
| | Loading Arrangement: | Two/Side Four-Arm |
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| DRILLBOAT APACHE |
| Dimensions |
| | Breadth: | 60 ft (18.3 m) |
| | Draft: | 5.0 ft (1.5 m) |
| | Length: | 210 ft (64.0 m) |
| | Depth: | 10.5 ft (3.2 m) |
| | Spuds(4): | 71 in² x 97 ft
1.8 m² x 29.5 m |
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| Operating Parameters |
| | Drilling Depth: | 85 ft (25.9 m) |
| | Pin-Up Distance: | 3.5 ft (1.1 m) |
| | Drill Hole Diameter: | 4.5 in (114 mm) |
| | Pin-Up Force: | 2,500,000 lb (11,125 kN) |
| | Drill Frames: | 3 Frames, 2 drill sets/position |
| | Spud Winches: | Four 184,000 lb linepull @ 44 ft/min each; 2.75-in wire rope |
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| Machinery & Power |
| | Fuel Capacity: | 10,000 gal (37,854 l) |
| | Fresh Water Capacity: | 5,000 gal (18,927 l) |
| | Anchor Winches: | Two diesel-driven winches with two drums/winch, 1.5-in wire rope |
| | Hydraulic Unit: | Two 650 hp (485 kW) diesel-driven units |
| | Generators: | Two 180 kW Caterpillar 3412S |
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| DRILLBOAT NO. 8 |
| Dimensions |
| | Length: | 175 ft (53.3 m) |
| | Depth: | 8.3 ft (2.5 m) |
| | Breadth: | 42 ft (12.8 m) |
| | Draft: | 4.0 ft (1.2 m) |
| | Spuds(4): | 900 in² x 80 ft
0.581 m² x 24.4 m |
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| Operating Parameters |
| | Pin-Up Distance: | 25.4 ft (7.7 m) |
| | Drilling Depth: | 85 ft (25.9 m) |
| | Drill Hole Diameter: | 4.5 in (114 mm) |
| | Pin-Up Force: | 400,000 lb (1,780 kN) |
| | Drill Frames: | Three frames; one drill sets/position |
| | Spud Winches: | Four 30,000 lb linepull @ 30 ft/min each; 1.5-in wire rope |
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| Machinery & Power |
| | Fuel Capacity: | 5,000 gal (18,927 l) |
| | Fresh Water Capacity: | 10,000 gal (37,854 l) |
| | Anchor Winches: | Two Manitowoc diesel-driven winches with two drums/winch, 1.125-in wire rope
40,000 linepull @ 66 ft/min |
| | Generators: | One 150 kW Caterpillar 342C
One 40-kW Detroit Diesel |
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| BOOSTER NO. 1 |
| Dimensions |
| | Length: | 80 ft (24.4 m) |
| | Breadth: | 42 ft (12.8 m) |
| | Depth: | 8 ft (2.4 m) |
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| Operating Parameters |
| | Discharge Diameter: | 30 in (762 mm) |
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| Machinery & Power |
| | Total Installed Power: | 3,600 hp (2,686 kW) |
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| BOOSTER NO. 2 |
| Dimensions |
| | Length: | 140 ft (42.7 m) |
| | Breadth: | 60 ft (15.2 m) |
| | Depth: | 12.5 ft (3.8 m) |
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| Operating Parameters |
| | Discharge Diameter: | 30 in (760 mm) |
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| Machinery & Power |
| | Total Installed Power: | 7,200 hp (5,370 kW) |
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| BOOSTER NO. 4 |
| Dimensions |
| | Length: | 113 ft (34.4 m) |
| | Breadth: | 56 ft (17 m) |
| | Depth: | 6 ft (1.8 m) |
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| Operating Parameters |
| | Discharge Diameter: | 30 in (760 mm) |
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| Machinery & Power |
| | Total Installed Power: | 3,600 hp (2,685 kW) |
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| BOOSTER NO. 5 |
| Dimensions |
| | Length: | 160 ft (48.8 m) |
| | Breadth: | 54 ft (16.5 m) |
| | Depth: | 12.5 ft (3.8 m) |
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| Operating Parameters |
| | Discharge Diameter: | 30 in (762 mm) |
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| Machinery & Power |
| | Total Installed Power: | 3,600 hp (2,686 kW) |
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| BOOSTER NO. 6 |
| Dimensions |
| | Length: | 215 ft (65.5 m) |
| | Breadth: | 45 ft (13.7 m) |
| | Depth: | 13 ft (4 m) |
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| Operating Parameters |
| | Discharge Diameter: | 30 in (760 mm) |
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| Machinery & Power |
| | Total Installed Power: | 3,900 hp (2,908 kW) |
| | Main Pump Power: | 14,400 hp @ 900 rpm |
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| BOOSTER NO. 7 |
| Dimensions |
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| Operating Parameters |
| | Discharge Diameter: | 30 in (760 mm) |
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| Machinery & Power |
| | Total Installed Power: | 3,900 hp (2,908 kW) |
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| BOOSTER NO. 8 |
| Dimensions |
| | Length: | 172 ft (52.4 m) |
| | Breadth: | 42 ft (12.8 m) |
| | Depth: | 12.5 ft (2.4 m) |
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| Operating Parameters |
| | Discharge Diameter: | 30 in (762 mm) |
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| Machinery & Power |
| | Total Installed Power: | 3,600 hp (2,686 kW) |
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