Project Name: Karwyderskraal Landfill (G:M:B+) – Cell 2

Client: Overberg District Municipality, Western Cape, South Africa

Project Description: The Contract comprised the design, site supervision, quality assurance and contract administration of the new cell (Cell 2) at the Karwyderskraal Landfill Facility.  The site is situated off the R43 between the Kleinmond turn-off and Hermanus.  The design of Cell 2 had to make provision for a 5 year life span which required approximately 300 000m³ airspace. The contract also comprised the design and construction of a dedicated composting area.  The layer works for cell 2 comprised of the following (from top to bottom):

  • 150mm thick leachate collection layer of 53mm stone
  • A5 separation non-woven geotextile
  • 4 x 150mm thick clay layers (local clay) compacted to 95% Std Proctor
  • A2 separation non-woven geotextile
  • 150mm thick leakage detection layer from clean imported sand
  • Rip and Re-compact 150mm thick in-situ clay to same standard as above clay layers

The leachate collection layer is drained by gravity towards the existing Cell 1’s leachate collection manhole from where it gravitates into a storage tank.

Cell 1 and Cell 2 have separate leakage detection monitoring sumps outside each cell.

Location: South 34 20 03 04  East 19 09 40 25

Contract Data (Construction)
Contractor: Merco Siviel
Commencement date: 1 November 2004
Completion date: 16 March 2005