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Storm and Sanitary Sewer Network Design Handbook

Storm and Sanitary Sewer Network Design Handbook

BNQ 3660-004
Storm and Sanitary Sewer Network Design Handbook

In 1989, the then Ministère de l’Environnement published Directive 004 on sewer networks. This document presented the Ministère’s recommendations regarding storm and sanitary sewer network design; it was used for many years by design engineers for the design of this type of structure.

In 2018, the Ministère de l'Environnement expressed the need to update Directive 004 to modernize it and adapt it to current practices.

The BNQ was thus given a mandate by the Ministère de l'Environnement to lead work on standardization with a view to developing a consensus standard to replace Directive 004 with a municipal sewer network design handbook. The new design handbook addresses the following topics:

  • the general elements of design;
  • the presentation of a project;
  • the hydraulic design of the pipes; 
  • the structural design of the pipes; 
  • the design of a dual drainage storm sewer network (minor network and major network); 
  • the design of a sanitary sewer network;
  • the design of pumping stations;
  • overflow structures.

The design handbook takes into account certain considerations such as ease of maintenance and operation of the structures, along with aspects related to user safety regarding the facilities and buildings.

In the case of a storm sewer network, which includes a minor network and major network (dual drainage), strategic choices have to be made by the design engineer to respond to conditions such as the rainfall intensities (intensity-duration-frequency [IDF] curves) considered in order to handle climate change.

Furthermore, the notion of infrastructure resilience is also addressed in the design handbook. Among other things, a method for the analysis of hydraulic transients in the pressure pipes is provided.

Finally, flow charts illustrating the steps for the design of storm and sanitary sewers are also presented to guide the design engineer.

Download Handbook (French only)

12816FRNBNQ 3660-004 Manuel de conception des réseaux d'égout pluvial et sanitaire
PROJECT IN PROCESS (planned date for publication: December 2023)

Committee members

Number of committee members: 17
Mr. Philippe BarceloParallèle 54 Expert-Conseil (P54)
Mr. François BeaudoinTetra Tech QI
Mr. David BeauséjourCitadel.
Mr. Saad BennisÉcole de technologie supérieure
Mr. Martin Bouchard ValentineMinistère de l'Environnement et de la Lutte contre les changements climatiques
Mr. Marc BélangerAssociation des ingénieurs municipaux du Québec (AIMQ)
Ms. Sophie DuchesneInstitut national de la recherche scientifique - Centre Eau Terre Environnement (INRS-ETE)
Mr. Driss EllassraouiVille de Laval
Mr. Musandji FuambaPolytechnique Montréal
Mr. Frédéric GaudetVille de Sherbrooke
Mr. Marc-André LabelleCentre des technologies de l'eau
Mr. Richard LizotteVille de Saint-Jérôme
Mr. Kaven MasséMunicipalité régionale de comté de l'Érable
Mr. Philip MorinMinistère des Transports et de la Mobilité durable
Mr. Yvon PlanteGroupe Hélios
Mr. Jean-François RenaudVille de Québec - Service de l'ingénierie
Mr. Gilles RivardLasalle NHC


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