Title:
240712004310: Application for renewal of the Environmental Clearance Certificate (ECC) for the ongoing marine diamond exploration, recovery and production operations in Atlantic 1 Mining License Area (MLA), Mining License No. 47, offshore south-west Namibia
Publication Year:
2024
Abstract:

The renewed Environmental Clearance Certificate (ECC) is required for the ongoing marine diamond exploration, recovery and production operations in Atlantic 1 Mining License Area (MLA), Mining License No. 47, Offshore Southwest Namibia. DBMN operations involves a robust logistical arrangement in the search (exploration) and recovery and production of marine diamonds. Exploration activities involves the use of non-destructive geophysical surveys methods such as Echo-sounder and high resolution sidescan sonar and high-frequency, low energy (<12 kHz) seismic surveys, medium-penetration seismic surveys followed by sampling operations. The sampling process is used to validate the geophysical survey and collects key data sets that is used in the final resource evaluation, geotechnical engineering assessment and determination of the correct recovery and production techniques to be used. The mv SS Nujoma is the only exploration and sampling vessel in the DBMN Namibia fleet. Marine diamonds recovery operations involve the extraction of seabed materials, on-board processing and diamond capturing process. The following is the summary of the two types of seafloor diamond recovery techniques that are used depending on the geotechnical engineering determination: The airlift-drill technology, which uses a 6.8 meter in diameter drill bit working in overlapping circles on the sea floor, and. The crawler technology, which uses a 280-tonne truck-mounted crawler dredging on the sea floor. Within its own fleet, DBMN currently owns six (6) production vessels, the mv AMV3, the mv. Mafuta, the mv. Grand Banks, the mv. Debmar Atlantic, the mv. Debmar Pacific and the mv. !Gariep. Additionally, the Coral Sea has been chaptered and bringing the total number of recovery and production vessels to seven (7). Five (5) of the production vessels use the airlift-drill technology, whilst only two (2) vessels (mv Mafuta and the mv. AMV3) uses the crawler technology. Seafloor diamonds recovery process takes place in the licensed area and in water depths of between 94 - 154 m. The production vessels are self-contained units, with onboard diamond processing facilities, and operate 24-hours a day for 12 months of the year, with a dry-docking scheduled every third year.

Item Type:
Report
Language:
en
Last date for commenting on this EIA: Tuesday, 6 August 2024

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