To support the increased production capacity at Navachab Gold Mine in Namibia, a major upgrade to the primary crusher infrastructure was required. The client’s original concept featured a central cast in-situ core designed to house the crusher and its associated equipment. To optimize construction time and cost-efficiency, an alternative solution was adopted: Reinforced Earth® TerraClass® retaining walls for the two wing walls on either side of the central structure.
Key figures:
- Maximum wall height: 16.1 meters
- Wall area: 1,205 m²
Designed to meet the demanding technical and environmental conditions of the mining site, the structure includes 25,677 meters of 45×5 mm galvanized steel reinforcing strips, ensuring long-term durability and structural integrity.
Geoquest South Africa was entrusted with the design, material supply, mould rental, and technical assistance for this critical structure. While panels were precast on-site by the contractor, Namibia Construction, the Geoquest team played a key role in guiding the implementation process. ADP Namibia acted as EPCM contractor, overseeing coordination and execution.
On-site panel precasting began in July 2024, and construction of the retaining walls was successfully completed by March 2025 — a testament to the efficient collaboration between all stakeholders.
We sincerely thank Navachab Gold Mine for their trust in our solutions, and we warmly congratulate the Geoquest South Africa team for their commitment and professionalism throughout the project.
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