In the 1990s, it was not only construction and engineering companies that benefited from the system of corruption and collusion set up by former mayor Gilles Vaillancourt. entreprises industrielles ou commerciales Landscape architects also benefited.

Three companies benefited from the fraudulent system that allowed to rig tenders and hijack the process of adjudication public contracts in return for a rebate paid to fundraisers, who acted under the direction of the deposed mayor between 2004 and 2010. This statement was made in a legal application filed before the Civil Division of the Superior Court of Quebec by the City of Laval in mid-December.

These were Beaupré & Associates, Rousseau Lefebvre and Daniel Arbour et Associates (IBI/DAA Group), which shared 64 professional services mandates totalling $3.4 million, free from competition. They are being sued now for around $680,000.