By Dhiladhila Magazine · Issue 07

A uranium plant lives on foundations, thickeners and a retaining wall – the works that decide whether it stands.

The public image of a new uranium mine is the pit and the plant. What actually gets built first is concrete: the foundations, the thickening and tailings structures, and the retaining wall that holds a stockpile in place. That is the work Deep Yellow has now handed to two Namibian firms in a package worth about N$392.6 million (about US$22 million).

The split is deliberately structured. As set out in the award, one firm takes the heavier reinforced-concrete scope and the other the foundations and slabs across the balance of plant, on parallel fronts designed to hold the construction critical path.

The concrete that carries a plant

The scopes are specific. Namibia Construction takes the reinforced concrete for the beneficiation, leach feed thickening and tailings transfer facilities, plus precast elements and a reinforced earth retaining wall supporting the run-of-mine stockpile. Nexus Building and Civils takes reinforced concrete foundations, plinths, slabs and embedded infrastructure across the balance of plant.

These are not cosmetic works. A processing plant transmits heavy, dynamic loads into its foundations, and a retaining wall behind a stockpile fails expensively if it is under-designed. The civil package is the structural spine on which every later mechanical and piping trade depends.

The concrete is not preparation for the plant; it is the structure the plant is bolted to.

Sequencing on the critical path

Deep Yellow framed the two contracts as running on multiple work fronts to streamline execution and limit delay. That is a scheduling decision as much as a capacity one. Splitting the civils lets foundation and superstructure works proceed in parallel rather than in series, compressing the programme ahead of a planned build once a decision is taken.

For the contractors, parallel fronts raise the coordination load. Shared access, concrete supply and quality control across two firms on one site demand tight interface management, because a slip on the foundations stalls the plinths and slabs that follow immediately behind them.

Two firms on parallel fronts buy speed only if the interface between them is managed tightly.

Building in the Namib

Location sets the discipline. Tumas sits in the arid Erongo interior, where materials travel far, water for concrete is scarce and heat complicates curing. Remote-site construction is not ordinary building priced up; it is a different practice, in which logistics and durability outrank architectural ambition.

That environment rewards firms that can self-supply and self-manage far from a depot. The value of awarding this work to established Namibian contractors is partly that they already operate across the country’s remote regions and understand what a Namib site costs to build on.

Distance and heat, not design, set the real difficulty of building at Tumas.

A capability test for local firms

The award is also a proof point. Delivering the civils for a process plant to international standard is a step up from roads and buildings, and it demonstrates whether Namibian firms can hold the quality and programme that a foreign engineering client demands. Success here is a reference that outlasts the contract.

The risk is the familiar one. Underbuild the structures and the plant is unsafe; overrun the programme and the whole project schedule slips with it. The contractors carry both the opportunity to prove local capacity and the exposure if the concrete is late or short of specification.

The prize is a reference for the next plant; the risk is a schedule that slips on the foundations.

For a contractor, engineer or developer, Tumas is a preview of where Namibian project construction is heading: process-plant civils, remote arid sites and international quality demands met by local firms. The decision it puts to the industry is whether to invest in the plant-grade concrete and coordination skills the next mine will need, or cede that work to imported builders.

Sources: The Namibian; Deep Yellow awards A$34m Tumas contracts – scope detail (Mining.com.au); Nexus Group – who we are