DREDGING SERVICES
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VIGILIN LOGISTICS LIMITED (VLL) offers integrated services package covering:
- Dredging studies
- Preparation of Tender documents
- Evaluation of tender offers by contractors
- Construction supervision
- All environmental aspects of dredging (see environment)
Dredging studies
Dredging projects for capital and maintenance dredging, beach replenishment and land reclamation, and removal of contaminated sediments mean more than simply underwater earthmoving. The many and various aspects of dredging and reclamation mean specialists are vital to the achievement of the most economic and environmental solutions to the clients problems. VLL can assist the client in achieving an efficient and effective low cost dredging system, including the selection of most suitable dredging equipment, the production estimates, the timing of the project and the cost calculations.
Tender documents
The preparation of the tender documents will depend on the type of project, but also on the type of tender document system (e.g. personal contract or Fidic contract, etc). After the selection and invitation of several contractors, questions and discussions will take place regarding the tender documents. Questions and answers will be provided to all selected contractors.
Tender evaluation
VLL has significant experience in the evaluation of the tender offers. Based on the results of the offers by the contractors a summary report will be provided. Tender evaluations have been among other things done by RSL personnel in NDDC, Shell and others.
Construction supervision
During the execution of the dredging works VLL can also provide specialists for the construction supervision. One of the biggest projects for which we have done the construction supervision is the Cawthone Channel trunk line replacement project for Shell.
Construction supervision
During the execution of the dredging works VLL can also provide specialists for the construction supervision. One of the biggest projects for which we have done the construction supervision is the Cawthone Channel trunk line replacement project for Shell.
SHORELINE PROTECTION
VLL constructs and maintains shore protection structures including jetties, groins, seawalls, breakwaters, and bulkheads in order to protect the coastline and the navigable water channels that can reach down to 100 meters. Early shore protection measures included jetties and groins constructed perpendicular to the shoreline for the purpose of lessening the impacts of erosion by reducing the rate of sediment transport along vulnerable coastlines.
VLL has invested heavily in procurement of world class next generation marine equipment for secured shoreline protection. Our clients recognize our first class professional mode of operation & safety measures applied in ensuring that we don’t end up causing erosion instead of protecting the shorelines.
SAND FILLING
As an industry leader in our chosen fields, we have gone beyond the limitations of the private sector to the public sector. We ensure that the appropriate CSD & Booster is used to optimize resources as well as meet up with client project deadline. This in turn is achieved by availability of spares and parts ranging from suction/discharge pipes to all hydraulic & mechanical arts. With our track record, we have shown that we can deliver any sand filling job, within record time.
SAND STOCK PILING
The construction industry relies heavily on hydraulic marine sands for part of its aggregate mix in the production of concrete. Sand grain of different sizes and composition are required by builders and contractors to execute their projects. We have the capability of dredging various sand stock pile types to meet the needs of the construction industry. Strategic stockpiles have been pumped for various ventures. This service is central to our activities. The Sand stock piling activities is backed up by adequate feasibility studies and economic viability tests.
CHANNEL CLEARING
As part of our dredging services, VLL has also specialized in canalization with new fields of tasks which include deepening, widening and maintenance of harbors and waterways, dredging access channels, sand wave removal and reduction of canalization blockage. Canalization requires absolute precision and for this reason, our operations are carried out with high precision and the very highest standards of safety, quality and environmental care, in line with the demands of the oil and gas operators. With our fleet of equipment, we offer credible, tested and professional services.
LAND RECLAMATION
RSL with its partner NEXT POINT has acquired extensive, worldwide experience in geotechnical and geophysical site investigations, surveys, studies, design, specification and supervision for:
- Coastal and port developments including land reclamation and beaches
- Maintenance of port approach and navigation channels, turning basins
and berths - Civil works such as immersed tube tunnels, pipelines and outfalls
- Minerals extraction
- Beach nourishment for the purposes of coastal defense.
The global nature of VLL’s activities has provided comprehensive experience of the wide variety of dredging methods and types and sizes of dredging equipment. Frequently, the reclamation (or beach nourishment) works are accompanied by structures such as revetments, to stabilize them once in place. Again, RSL’s expertise in these areas is unparalleled.
RSL also has experience of the survey equipment and methods used for monitoring and controlling dredging, reclamation and spoil disposal operations as well as for the determination of quantities for payment. We utilize state-of-the art numerical modeling software, both developed in-house and commercially available software, to model the potential impacts of the dredging and reclamation works on the wider marine environment, based on a simulation of the hydrodynamic and sediment regimes in and around dredging and reclamation works.
Our expertise in this field includes:
- Design, specification and supervision of dredging and reclamation works
- Dredging methods and equipment
- Navigation studies and maritime risk assessment
- Numerical hydrodynamic and sediment transport modeling
- Siltation studies
- Extraction of sands and gravels
- Reclamation design
- Ground treatment and monitoring instrumentation
- Bunds and revetments
- Environmental impact studies
- Contaminated sediments and spoil disposal studies