Construction of a composting platform on the capping of a technical landfill site at Lachute

project outline

The RIADM operates a composting platform at Waste Management’s technical landfill site in Lachute, Quebec. The RIADM wished to relocate the platform to a capped section of the site.

Groupe Alphard were mandated to complete a geotechnical feasibility study and to prepare preliminary engineering for the construction of the new platform.


Intermunicipal Government of Argenteuil and Deux-Montagnes


Argenteuil Deux-Montagnes, Quebec



services provided

  • Geotechnical characterisation of the materials composing the existing capping layer
  • Stability analysis of the new composting platform
  • Evaluation of the subsidence risk
  • Preliminary design of impermeable systems, runoff water drainage systems and access roads
  • Preparation of a geotechnical study for the project’s Certificate of Authorisation request
  • Preliminary construction cost estimates

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