Majority Aboriginal-Owned Civil Contractor | Pilbara, WA
Majority Aboriginal-Owned Civil Contractor | Pilbara, WA
Civil Construction Services
Professional excavation & trenching contractors in WA. Servicing metro and regional areas including Perth, Karratha, the Pilbara and the South West.
Gajawari KW performs excavation and trenching for utilities, drainage, and structural works across Western Australia.
Operations are executed to line and level under compliance controls, with staged access, safe working methods, and minimal disruption to active sites.
We execute trenching for power, water, communications, and drainage infrastructure with alignment, depth, and separation controlled to specification. Trenching operations are staged to coordinate with service installation, bedding placement, and inspection access.
We implement trench support systems based on soil type and depth, using battering, benching, or engineered shoring to maintain wall stability and safe access. Shaping is adjusted in real time based on ground conditions and service entry points.
Trenches are cut to precise dimensions using machine control or manual guidance, ensuring consistent width, invert level, and gradient. Profile checks are conducted prior to bedding installation or pipe placement to prevent misalignment or rework.
Backfill is placed in controlled layers with compactors matched to trench dimensions and soil type. Compaction testing is conducted per lift to verify density and prevent settlement. Material changes are recorded and managed to align with service specifications.
Following service installation and backfill, we reinstate surface finishes to original or upgraded condition. This includes asphalt, concrete, or gravel surfacing as required, with transitions and joints tied in to surrounding pavement or surface layers.
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