United Wambo JV MIA & Water Management


The project involved the construction of United Collieries mine water management networks to control both pit water and divert upstream catchment.

Scope of Works:

Including all civil, structural, mechanical, electrical & hydraulic works:

  • 500,000 cu.m bulk earthworks
  • Two new mine water dams
  • Roads and pavements
  • Concrete panel retaining wall structure
  • Water storage tanks and pump stations
  • Demolition of existing heavy vehicle wash bay
  • Electrical switch rooms and switch boards
  • Heavy vehicle and light vehicle wash bays
  • Tyre change facility
  • Boom gates and floodlighting
  • 415V main switchboard, switch room, diesel generator and 11,000 / 433V transformer
  • 2.5km of turf and rock lined clean water diversion drains
  • A levee bank and various mine water drains

Highlights and Challenges:

  • Design, implementation and maintenance of full erosion and sediment controls in sensitive areas (Wollombi Brook)
  • Resequencing of works and implementing additional safety measures allowed the operational mining area to continue works
  • Sourcing, monitoring and controlling 180,000 cubic meters of material to meet stringent quality requirements for dam wall construction
  • Safely rock lining dam walls and clean water drains in difficult access conditions