Fly Ash Settlement Pond Dredging – QLD

Specialised dredging, desilting, and sludge removal for plastic lined process ponds and dams in mining and energy where conventional methods are ineffective.

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Project Overview

  • Location: Queensland
  • Industry: Energy
  • Asset: Settlement Pond
Accumulation of fine fly ash within the settlement pond was reducing available storage capacity and impacting settling performance.

Scope

  • Ongoing removal of overflow fly ash from secondary pond
  • Management of fine, non-compacted ash with high water coverage
  • Operation within active industrial environment
  • Water level controlled to optimise dredging performance
  • Slurry transfer to adjacent discharge point
  • Controlled dredging approach suited to pond configuration

Outcome

  • Maintained continuous sediment management within the pond
  • Restored and sustained effective storage capacity
  • Improved settling performance and water reuse conditions
  • Minimized re-suspension of fine ash during removal
  • Efficient extraction of non-compacted material using jetting and suction