Description

Private treaty sale on behalf of the Security / mortgage holder out of the Bankruptcy of The Donge Flushing Yard, amongst others are for sale, Backhoe Dredgers “Backacters” (BA900 / BA 1100) as well as a huge amount of Spare-Parts consisting of Booms, Sticks, Cylinders, Buckets, Hydraulic and Electric components, Navigation and so on.

For sale: Backhoe Dredger De Donge BA900 Pushing Daisies

The S-type dipperbarge has been designed to have, apart from the dredging function, a large free deck area, on which auxiliary equipment e.g. a large crane, or pile driving installation etc, can be put. On the deck it can carry goods/ products to be used for port-construction etc.

Another difference to the “dredge” concept is that the spudcarrier (for very exact, 100 % in line trench dredging) has been omitted. Instead self-propulsion ‘thruster’ for manoeuvring purposes at the site have been mounted for accurate positioning. Thus the dredge at site, can work without depending on tug assistance.

All three spuds are non tilting. Sea-securing of the spuds is by lashing with chains from the top to deck.

The large deck area and wider than usual provides space for the possibility to carry deck – loads up to about 600 ton. Several auxiliary cranes are fitted for services on deck and are present to provide services to the excavator.

The fuel-tanks of this barge are having a total 120 m3 approx. capacity, which could – at request – be enlarged.



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Dimensions:
60.00 x 19.00 x 3.50 metres.
The bow of the dredge has been made higher, in order to create optimum towing conditions.


Classifications:
“Bureau Veritas”, + Hull ● Mach, special service, unrestricted navigation, “assisted propulsion”.
This means the dredge has a “Deep Sea” hull and can be towed world-wide.


Spuds:
Three stabilising spuds, each with a length of 30.00 metres will be present.
The dimension is 1400 x 1400 mm.
The weight of the spud is about 90 tons.
2 topsheaves and 2 bottomsheaves, are built in.
A rockpoint is present.
The sheaves are of solid steel.


Spudcasings:
All three spuds are placed in three heavily built, spudcasings.
The casings have a height of approx. 1200 mm above deck and all four reefing sheaves can easily be observed and greased.


Spudwinches:
All three, hydraulically driven, special duty, spudwinches have a 50 tons capacity.
Each winch is standing in an under deck winchroom.
The drums are grooved for 50-mm wire ropes and can be clutched out to obtain the “spud anchor” function.
The in the hydraulic system, integrated brakes are functioning 100% automatic.





Reefing:
The winches are reefed four (4) times to the spud, thus per spud 200 tons = 600 tons hoisting capacity is available for stabilisation.
This dredge can, with a splitbarge along side, work till a max wave-height of 1.50 M.


Self-manoeuvrability:
For self-manoeuvrability the dredge has been outfitted with two 350 kW hydraulically driven
rudder propellers, make H.R.P. The “thrusters” are driven by the nearby installed hydraulic powerpacks.
Due to this the dredge does not depend on tugs at the site.


Limited “Sailing” option for assisted propulsion:
“Bureau Veritas” and several flag states have agreed to permit the barge, not only to manoeuvre at site, but sail in a limited area at site and till 5NM out of port..
For this option an additional set of navigation instruments is required, such as a gyro, a radar, etc.
The value of this additional instrumentation is €. 118,000.00 has been installed on the “Pushing Daisies”.
Sailing in the port of the site is allowed as well till 5 nautical – miles outside the port where the dredger works.


BA 900 marine excavator:
The BA 900 marine excavator is mounted at the aft-deck, it’s flexible connection pedestal is lowered into the aft-section and is mounted on a heavily built counter foundation. Due to the shape of the aft the dredge can dredge max. 180°.
Preference is made to the BA900 specific documentation.




The dredging equipment will be as follows:
Monobloc : 16.00 metres.
Stick : 7.00 metres.
Bucket : 10.00 m³ SAE
Max. dredging depth : 22.00 metres.
Max. penetration capacity : 105 tons approx.
(Option: second stick : 10.00 metres.)


Second equipment with the second stick:
Monobloc : 16.00 metres.
Stick : 10.00 metres.
Bucket : 7.00 m³ SAE.
Max. dredging depth : 25.00 metres.
Max. penetration : 120 tons approx.


Dredging instrumentation:
A complete “Seatools” dredging instrumentation will be built in the excavator’s cabin.
Automatic draught levelling is integrated, so that eg tides and lower water are automatically compensated as well as penetrating spud.
The dredging instrumentation is being compensated for quick level changes as well.

Power packs:
The BA 900 is driven by one type QSK60 (1 x 1910 kW), Cummins diesel, and one QSK11 (1 x 310 kW), Cummins diesel.
Thus redundancy is guaranteed, not only for dredging operation, but as well for manoeuvring purposes and for spud-movements.

The diesels are water cooled by N.R.F. bun coolers, which are mounted in recesses on the under deck engine room, right before the flexible foundation section.
Both diesels drive via a gearbox, the H-pumps for the Backacter and other hydraulic consumers.

The H-pumps drive the thrusters and spud functions, as well as, the anchor winch, the auxiliary cranes etc.
Small consumers are put on the 310 kW powerpack.

Aft engine room:
The two powerpacks are mounted in the engine room under deck, just behind the BA 900.
The aft-engine-room has a main entry and an emergency exit. The hydraulic supply tank to the main-pumps is integrated in the housing of the engine-room. Thus the hydraulic main-pump are having “gravity” filling which enhances the expected life-time.
The hydraulic installation and all piping with H-filters to the backacter and thrusters, etc is found here.

A large hydraulic-oil cooling units is mounted.
The coolers for diesels, for the gearboxes, and for the hydraulic installations are found in seachests built in the side and bottom corners of the engine-room.
The floor of the engine-room has anti-slip steel plates: airfans provided for aircirculation (4 units of each 15000 m³).

Just in front of the engine-room, there is a generator room, where the 2 x 175 kVA generators are found.
All electric switchboard are fitted here.

The ballast bilge system is mounted in the aft engine room.
A standpipe to be installed with valve blocks of the bilge ballast system, etc in the generator room.
Aircirculation to be provided for the generator room.
A steel floor to be fitted. An entry and emergency exit to be provided.

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The following fluid systems will be present:
• Ballast-bilge system for all important spaces and 2 ballasttanks.
• The capacity of the E-pump is 50m³ per hour.
• A dirty oil tank and pump system will be present.
• Fuel system from maintank to daytanks and from there to the consumers.
• An oily-water separator to be installed on the generator room.
• Sewage treatments system (ps bow).
• Sanitary and freshwater system.
• Cooling systems for the diesels, the gearboxes and hydraulic system.

Accommodation:
A two storey accommodation is present on board at the bow.
The wheelhouse is situated at the topdeck.
A complete carpentry in accordance with the regulations is present.
Air-conditioning will be installed.
Windows with security glass and steel outside doors are present.

In the wheelhouse all navigational instruments will be placed.
Diesel information and steering is controlled from here.
A spud operation desk is not only found in the excavator’s cabin, but in the wheelhouse as well.
On the wheelhouse top deck VHF mast, radar, etc. and the navigation mast will be present.


Winch rooms:
• Entry doors under deck.
• Walkways to the winches and to the guiding sheaves under deck.
• Aircirculations.
• Passings for the reefing wire-ropes through the deck to the spudcasings.


Anchor winch:
On the-high-bow a double hydraulically driven anchorwinch is mounted.
A hawse pipe, a chain locker and chainstopper to be present.


Service space:
At Ps bow, half under the accommodation a service space room is present. In this space the sewage treatment installation, and the oily water separator is present.
A sludge tank of 11 m³ capacity and a dirty oil tank of 11 m³ are present here.

The compressor unit for the air conditioning / heating system of the accommodation is mounted here.




Auxiliary cranes:
Two auxiliary cranes, hydraulically driven, will be fitted on board, both are stiff boom types.
A DSF 600 crane with a reach of 25M is fitted, at max reach it has 45 tons capacity, at 19M, it has max. 60 tons capacity. The auxiliary crane for smaller components is the DSF 50, with a max. capacity of 5 tons at 12M max. reach.
See G.A. plan for planned locations.


Miscellaneous:
• Large, built in, fuel tank with a capacity of approx. 120 m³.
• A daytank for the diesels in the engine-room is present.
• Large, built in, fresh water tank with a capacity of approx. 60 m³.
• Sanitary installations, with e.g. a hydrophore installation, a sewage treatment installation, etc.
• 4 pair of double bollards.
• Two towing brackets to be fitted.
• A covered repair storage space at St.B. bow deck.
• Two dirty oil tanks will be built in.
• A chainstopper to be installed for the 44mm drain.
• Anchor-winch and a chainstopper
• Anchorweight approx 1400 kgs HHP
• A hawse pipe and chainlocker are present.
• An under-deck storage for the spare-cylinders.

Specifications

Engine(s)

Accommodation

Equipment