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Anglo American Platinum’s Mototolo Concentrator project

Multidisciplinary Stefanutti Stocks has executed three large-scale, multi-million mining infrastructure construction projects (phase 1, 2 and 3) for Anglo American Platinum’s Mototolo Concentrator project. These projects were executed on the mining house’s Mareesburg farm site in Steelpoort, Mpumalanga, and included the participation of the Roads & Earthworks, Civils, and the Geotechnical Discipline.

Phases 1, 2 and 3 consisted of various stages of earthworks and civil construction of associated infrastructure for the Tailings Storage Facility (TSF). Phase 1 was executed between June 2017 and May 2019. Phase 2 was executed between October 2019 and December 2021, with Phase 3 running almost concurrently between May 2020 and December 2021.

Background: Mototolo Mine is an underground platinum mine located in the north-eastern part of South Africa in Burgersfort, Limpopo and represents one of South Africa’s largest platinum reserves. Stefanutti Stocks undertakes work for several Anglo-American mines in South Africa.

The Project Scope

Phase 1
Stefanutti Stocks Roads & Earthworks was awarded the Mototolo Concentrator contract that entailed earthworks and the construction of associated civil infrastructure for the facilities TSF, specifically for a 300 000m2 dam basin area constructed on a greenfield site. The scope included:

  • Dam construction: Clear and grub, topsoil removal, explosives / blasting, importation of commercial filter sand, free issued fine and coarse tailings materials, the supply and installation of 0.75mm, 1.5mm and 2mm HDPE liner and specialist testing.
  • Concrete works: Construction of a substation building, civil concrete works construction including valve stations, culverts, silt traps, solution trench, and concrete lined stormwater diversion trenches.
  • Pipeline: Construction of a 12km steel multi-line tailings distribution pipeline system.
  • Ancillary works: Fencing works, hydroseeding the site areas, electrical and instrumentation construction, and overhead lighting around the dam basin.

 

Phase 2

The follow-on contract from Phase 1 once again entailed earthworks and the construction of associated infrastructure – this time for the elongated extension of the dam basin area spanning a greenfield area of approximately 105 000m2. The scope included:

  • Dam construction: Clear and grub, topsoil removal, explosives/blasting, importation of commercial filter sand, free issued fine and coarse tailings materials, the supply and installation of 2mm HDPE liner and specialist testing.
  • Concrete works: Over 6,000m³ of concrete for the flush water valve station, culvert additions, concrete encased pipelines, silt trap, and solution trench.
  • Pipeline: Supply, installation and commissioning of steel, uPVC and HDPE pipelines.
  • Ancillary works: Clear-Vu fencing, hydroseeding, electrical and instrumentation construction, and installation of overhead lighting around the dam basin.

 

Phase 3

The follow-on contract from Phase 2 entailed the width extension of the dam basin area, spanning approximately 166 000m2 greenfield area and included:

  • Dam construction: as per the scope for phase 2.
  • Concrete works: as per the scope for phase 2, with the addition of 9 ±20 meter high multistage intake towers.
  • Pipelines: Supply, installation, encase with concrete and commissioning of uPVC and HDPE piping works.
  • Ancillary works: hydroseeding the site areas, electrical and instrumentation construction, overhead lighting around the dam basin and the construction of a steel pipeline.

 

Notable quantities

  Phase 1 Phase 2 Phase 3
Site clearance 1 294 882m² 175 433m² 241 796m²
Excavation 753 980m³ (bulk) 24 858m³ (restricted)

20 310m³ (bulk)

17 666m³ (restricted)

55 396m³ (bulk)

Concrete works 2 580m³ 6 126m³ 2 782m³
HDPE liner 407 738m² 105 740m² 166 060m²
Crushed aggregate 87 500m³ 95 500m³
Base preparation 270 624m² 30 624m² 51 068m²
Hard rock 167 275m³ 38 358m³
Fine/coarse tailings haulage 146 093m³ 87 500m³ 62 996m³
Hydroseeding 109 971m² 129 090m² 57 302m²
Topsoil removal 89 632m³ 52 500m³ 28 068m³
Reinforcement 381 tons 284 tons 121 tons

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Stefanutti Stocks: Roads & Earthworks Discipline

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