Significant achievements and benefits

When deleterious material was exposed during initial earthworks, DM Civil arranged screening of the uncontrolled fill, dramatically reducing the volume of unsuitable material sent to landfill. An additional environmental benefit resulted, with the screened fill being recycled for use in the development.

The discovery of extensive uncontrolled fill posed initial construction issues. The rubble and unsuitable material was not only discovered at the surface but more was encountered at depth when earthworks commenced. The entire site was test pitted to confirm the magnitude of the uncontrolled fill, which included cables, plastic and shopping trolleys.

After the full geotechnical investigation was completed, the affected areas were screened to separate the unsuitable material. This exercise allowed the majority of the surrounding fill to be reused, reducing the quantity of material required for landfill. In total, only 3,500m3 of 55,000m3 screened was required to be taken off site. This reduced costs incurred by the client and minimised environmental impact.

As this subdivision was situated on the side of a hill, significant limestone walls were required, in some cases more than 3.5m in height. Many of the walls were front entrances to cottage lots that included stairs, landings and feature letter boxes. DM Civil ensured all services for these lots were laid prior to the walls being constructed.

This new subdivision complemented Landcorp’s previous land releases in Clarkson, providing more opportunities for first home owners to live in a modern community with ample amenities and public open spaces.