Delta Plant

Location: Ermelo, South Africa | Client: Continental Coal PTY

Penumbra Mine

Project Description

Greene Consulting Engineers (Pty) Ltd was appointed by Continental Coal Pty to study the existing storm-water management strategy, and to upgrade and/or maintain the existing storm-water systems at the Delta Plant near Ermelo. Upon completion of the studies, Greene was appointed to supervise the design and construction of the following infrastructure:

  • Pollution-control dam (PCD) (32 000 m³ storage capacity) with subsoil drainage, subsoil sump, silt traps, emergency overflows and pump station.
  • Seepage barrier (total of 620 m in length).
  • Concrete lined cut-off drains (total of 1.5 km in length).
  • A co-disposal facility designed for an expected life-of-mine of 12 years. The design volume for the discard is 598 205 m³, and the total design volume for slurry is 416 574 m³. The final footprint will have an average height of ± 12 m and a footprint area of 22 ha.
  • Co-disposal outlet works (spillway)
  • Co-disposal collection dam (9 500 m³ storage capacity)


Project Scope

The main civil- and structural engineering scope of work included the following:


Fully lined Pollution Control Dam – 32 000m³ capacity

Concrete-lined cut-off drains

Co-disposal platform with subsoil drainage

Co-disposal subsoil drainage

Co-disposal collection dam – 9 500 m³ capacity

Co-disposal outlet works


Construction of Pollution-control dam

    Total project value: R 16 million

  • Completion of Project


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