Trailing Suction Hopper Dredge - Atchafalaya

1,300 CY Self-Propelled Hopper Dredge

1980 Twin City Shipyard-built self-propelled hopper dredge with a 1,300 cubic yard hopper capacity and both bottom dump and bow discharge capabilities. The vessel measures approximately 197' x 41' x 16.5' and has a maximum effective dredging depth of approximately 45'.

Powered by twin Caterpillar D398 850 HP main engines driving Niigata ZP-D8 Z-Drives. Main engines were rebuilt in 2021 and have low operating hours since rebuild. Dredging equipment includes a 700 HP dredge motor, 64" suction head, 22" suction pipe, and 20" discharge pipe.

The vessel includes accommodations for 15, extensive survey equipment, and a substantial inventory of spare parts and components.

GENERAL

Built: 1980 – Twin City Shipyard Inc.
Hopper Capacity: 1,300 CY
Dimensions: 197' x 41' x 16.5'
Gross Tonnage: 706
Discharge: Bottom Dump and Bow Discharge Capability
Maximum Effective Dredging Depth: Approximately 65'
Fuel Capacity: 25,000 gallons
Potable Water Capacity: 7,500 gallons

DOCUMENTATION

USCG Official Number: 630005
IMO Number: 7914248
ABS ID: 8011075
Hull Number: 552
Call Sign: WDF6512
Date Keel Laid: December 1980
ABS International Load Line: Valid through September 2026
USCG Certificate of Inspection: Valid through January 2027

DIMENSIONS & CAPACITIES

Length: 197'
Breadth: 40.8'
Depth: 16.5'
Vertical Distance – Bottom to Top of Mast: 74.4'

Light Draft – Forward: 5.3'
Light Draft – Aft: 8.7'
Light Draft – Average: 7'
Loaded Draft – Average: 14.6'

Gross Tonnage: 760.60 LT
Lightship Displacement: 919.13 LT
Summer Free Displacement: 2,470 LT
Summer Free DWT: 1,506 LT
Dredging Mark Tonnage: 2,850 LT

Hopper Capacity: 1,300 CY
Hopper Length: 105'
Hopper Width: 22'
Overflow Minimum: 760 CY
Pump-Out Capability: Yes

MAIN ENGINES / PROPULSION

Main Engines: (2) Caterpillar D398
Horsepower: 850 HP each / 1,700 HP total
Propulsion: (2) Niigata ZP-D8 Z-Drives
Main Engines Rebuilt: 2021
Engine Hours: 1,154 & 1,205 hours
Maximum Propulsion: 2 @ 850 HP

GENERATORS

Service Generators: (2) Caterpillar 3306
Service Generators Rebuilt: 2021
Hours: 1,588 & 1,626 hours

Dredge Generator: Caterpillar C27
Dredge Generator Hours: 14,500

DREDGE EQUIPMENT

Dredge Motor: 700 HP
Number of Drag Arms: 1
Maximum Digging Depth @ 45°: 65'
Suction Head: 64"
Suction Pipe I.D.: 22"
Discharge Pipe I.D.: 20"
Available Pump HP: 1 @ 700 HP
Pump RPM – Dredging: 290 RPM
Pump RPM – Pumping Out: 360 RPM
Pump Impeller Diameter: 48"
Jet Pump: 180 HP

AIR COMPRESSORS

(2) Quincy 350L

ACCOMMODATIONS

Total Beds: 15
First Floor: 9 beds
Second Floor: 4 beds
Third Floor: 2 beds

LOCATION

Quincy, Massachusetts

SPARES

(1) Back door for dredge pump
(3) Caterpillar C27 generators in various states of repair
(4) Keel coolers
(1) GE 752 dredge pump motor
(2) Drag head HPU motors
(2) Dredge valve bonnets
(2) Rubber flex hoses for drag arm
(2) Jet water pump motors
(1) Complete Z-Drive with propeller
(2) Twin Disc propulsion clutches
(1) Complete set of rubber hopper seals
(1) Hydraulic steering motor
(1) Straatman bow connection

SURVEY EQUIPMENT

(1) Ohmart VEGA Nuclear Density Gauge
(2) VEGAPULS 65 Ullage Sensors
(2) Trimble SPS865 Receivers – Installed
(3) GPS Antennas & Cables – Installed
(4) Rosemount Pressure/Suction Transmitters
(1) HD25A Sensor – Installed on Davit
(2) Pitch/Roll Inclinometers in Shared Housing
(2) RPM Sensors
(2) Hannay Hose Reels for 1/4"–3/8" Hose

PLC EQUIPMENT

Main PLC: SLC500 – Power supply, CPU, scanner module, (2) analog input modules, and (2) digital input modules on an 8-card rack.

Remote PLC: SLC500 – Power supply, adapter module, and (3) analog input modules.