RAAF Base Housing Division – Flood Mitigation

Type: Civil Construction
Client: Defence Housing Australia (DHA)

MCE was engaged to construct an 880-meter-long open unlined drain at RAAF Base Darwin. The scope included firstly working with the client to redesign the project.

Once design was complete, a full safety and environmental policy was implemented to cover all aspects of the project from underground services to monitoring of asbestos and dust from the works.

Stage one:

  • Stripping topsoil from the total length of the site and stockpiling
  • Bulk excavation of the drain followed using excavators with GPS
  • Soil to be used as fill was carted to an assigned stockpile
  • Trimming and shaping drain batters
  • The precision finishing was achieved by a GPS-equipped grader

Stage two:

  • Construction of 18 drop structures using gabion baskets and reno mattresses
  • Construction of five concrete crossings to protect batter works at intersections of existing roads.

Stage three:

  • Construction of the outlet structure and over flow dam
  • Cutting into the existing storm water pipe
  • Fitting 36 metres of grates to dispose of the huge volumes of water
  • Topsoiling and grassing

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