Cameby Downs
Mine
Location
Miles QLD
Client
Yancoal
Duration of Project
May 2014 – July 2014
Contract Value
$1.7 Million
Shamrock Civil Engineering was contracted by Yancoal to carry out the cell 1 rectification works at Cameby Downs Mine.
Scope of Work
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Maintenance of existing tracks
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Stripping and stock piling of unsuitable materials from existing embankment downstream face
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Stripping of unsuitable materials from the embankment footprint to nominal depth below the natural ground surface
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Material conditioning within borrow pit area
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Borrow fill placement on 3:1 batters including:
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Tyne, water, compact and proof roll loose material
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Lightly scarifying, ensuring sufficient overlap
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Picking up of 200-250mm of conditioned material from borrow pit
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Placement of 150mm layer of loose conditioned material onembankment wall and progressively cut into existing slope with aminimum 300mm high stepped bench
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Keeping area moist whilst compacting and rolling, until the area reached compacted to a maximum layer of 200mm
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Final Trimming of Embankment
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Supply and installation of vertical continuous sand drain and horizontalfinger sand drains
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Supply and installation of 20mm clean rock toe drainage, 200mm dia. slotted uPVC pipe to perimeter toe drain and end finger drains
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Supply and installation of 2m Dia. X 2.5m (H) precast concrete manholes forseepage collection