The Bonacavor

Jerico’s newly acquired dredge, the Bonacavor, offers unparalleled precision and accuracy, coupled with the flexibility to adapt to difficult conditions.

Using a barge-mounted backhoe to remove both hard and soft materials, the Bonacavor offers the horsepower to work effectively in heavy, compacted soil and rock at depths as great as 50 ft.

Precise excavator controls and a sophisticated digital positioning system allow the Bonacavor to achieve very tight dredging tolerances - as low as 0.1 meters - even when working at the dredge's maximum depth.

Environmental Remediation

The Bonacavor’s exceptional accuracy and precision makes this dredge ideal for environmental remediation projects and the close tolerances of crowded harbors and ports.

The Bonacavor’s flexible modular design allows it to handle a wide range of bottom types, from very hard rock to soft, loose sediments. By modifying the backhoe’s configuration, the dredge can adapt to an equally wide range of reach/depth/capacity combinations.

The Bonacavor's Machinery and Auxiliary Systems

Excavating Machinery

The dredge is fitted with one [1] Liebherr P 984 Litronic backhoe type excavator driven by a Cummins KTA 19 C 525 diesel engine rated 586 hp at 1800 rpm. Reported maximum reach; 50’, reported maximum capacity; 100.8 tons.

Additionally, the excavator has the following major attachments:

One [1] standard grab, 4.7 cubic yard capacity

One [1] environmental grab, 6.5 cubic yard capacity

One [1] backhoe bucket, 4.8 cubic yard capacity

One [1] orange peel grab

One [1] log tong with rotator

One [1] rotary head extension, 10 foot

One [1] dipper arm, 15 foot

One [1] lot; spare hydraulic cylinders

Auxiliary Machinery

Machinery:

One [1] main generator SDMO John Deere Power tech 4.5/6.2 L model 55125UC, 113 kW, Tier II OEM

One [1] lighting/standby generator M & L Isuzu, 3-cylinder diesel model ML8.2INRD, 8.2 kW

One [1] Aurora model 40 FDNC knuckle crane with extension, 40-foot radius, maximum capacity 4,650 lbs

Three [3] Ridderinkhof BV spud winches, model SPW-H 180-92 7744 1-3, 36-ton capacity

Three [3] mooring winches (mfg not noted)

One [1] Microphor marine sanitation device (MSD), Type P/N 24159, new 2004

One [1] Fuel oil transfer pump, Viking model AK-4195 driven by 5 hp electric motor

One [1] Kaydon Bowser fuel filter/separator, model VK 52 (NNC)

One [1] Speed Aire air compressor and tank, model 1WD53 driven by 5 hp electric motor

One [1] Daniel fuel transfer meter, 1-1/2”

One [1] ventilation fan, 24”

One [1] potable water pump, model 3P716C driven by approx 1 hp electric motor, 1” pipe, pressure tank

One [1] spud operation panel

One [1] main hydraulic pressure unit (HPU); tank, valving, return filters, and approx 30 hp emergency pump

One [1] service crane HPU, EBR Techniek, 100 gal tank, approx 30 hp in-tank pump, sight glass, controls, filters

One [1] Westinghouse transformer, model DT-3, 75 KVA

Two [2] Hanney hose reels, stainless steel

Misc. Equipment:

One [1] Phase III battery charger, PT-24-35CE

One [1] plastic battery box with two [2] 8-D batteries (housetop)

One [1] J-Box navigation light panel with alarm (Perko navigation lights)

One [1] Tripp Lite power supply, PR-60

One [1] Curtis Mini TV

Two [2] CCTV cameras, pan-type

One [1] Toshiba on-line UPS power supply, 400 SE Series

Three [3] steel desks, steel storage locker, file cabinet, water cooler/dispenser

Three [3] fire extinguishers, serviced/inspected July 2004

One [1] Fedders window AC unit

Various computer, keyboards, hard drive, monitor

Engine Exhaust Systems

Piping: Dry type steel and flexible steel piping lagged in machinery space and excavator. Exhaust is insulated and isolated from personnel and combustible materials.

Fuel System

Tanks: One [1] storage tank and one [1] day tank with vents and shut-off valves at tanks.

Plumbing: Steel supply and return lines through strainer, water trap, and filters to engine with flex lines, and shut off valves at engines.

Electrical System

Power Supply: 220/440-volt AC @ 60-hz. from service generators and 12/24 volt DC from storage batteries;

Wiring: Plastic and basket weave armor covered, multi-strand, copper marine type wiring, well secured throughout vessel's interior.

Fixtures: Marine type exterior and interior lighting fixtures, with marine type switches, light sockets and
receptacles in vessel's interior. The electrical installations are installed in accordance with industry standards and high quality materials were noted during the survey.

Circuit Protection: Dead front main panel with drip shield; circuit breakers and/or fuses in all circuits with master switch located in engineers control room.

Hydraulic Systems

The main hydraulics for the excavator, traveling spud well, spud and mooring winches are provided by the excavator prime mover with tank , controls and emergency back-up pump located within the machinery space.

The deck service crane hydraulics are provided by a dedicated 30 hp pressure unit. The piping is welded pipe and or hoses with good condition and high quality hangers were noted throughout the vessel interior.

Additional details previously described.

Ventilation Systems

Excavator Cab and Accommodations: package air conditioning units are installed.

Machinery Room: Natural and mechanical type through scuttles and vent openings, equipped with one [1] 24” fan.

Anchoring Gear

None; spuds and mooring winches used for positioning.