Out of a total of six quarries in Montréal’s territory, the Lafarge quarry is the only one remaining in operation. The quarry and its surroundings have been subjected to a number of plans and measures to mitigate nuisances. The other five quarries are now used for other purposes.
The former Meloche quarry in the Borough of Pierrefonds—Senneville is used as a waste disposal site. The quarry in the Borough of Kirkland is currently split between a western half used for industrial purposes and an eastern half used as a recreational site.
The Ville de Montréal owns the Saint-Michel Environmental Complex, where certain non-putrescible landfill operations still take place. This site, whose edges are already a park, is being developed as a metropolitan park.
The Ville de Montréal also owns the former Francon and Demix quarries. The former, located in the Borough of Villeray – Saint-Michel – Parc-Extension serves as a snow disposal site. The latter, located in the Borough of Rivière-des-Prairies – Pointe-aux-Trembles – Montréal-Est, is used to bury ashes produced by sludge incineration at the City’s wastewater treatment plant.
Areas in and around these former quarries present significant land-use restrictions. Once filled, they may cave in or experience other geotechnical problems.