The Centre d'expertise hydrique du Québec
The Centre d'expertise hydrique du Québec (CEHQ) is an administrative
unit of the ministère du Développement durable, de l'Environnement, de la
Faune et de la Lutte contre les changements climatiques (MDDELCC). Created as an agency by the Convention de performance et d'imputabilité (Agreement on Performance and Accountability) signed in April
2001 with the Minister of the Environment, the CEHQ reports to the Direction
générale de l'expertise hydrique, de l'analyse et des évaluations
environnementales (General Water Expertise, Analysis and Environmental
Assessment Directorate). The CEHQ is constantly evolving to remain at the
leading edge of knowledge and know-how in the fields of dam technology,
water regime and water in the domain of the State.
Scope of Activities
Hydric Knowledge and Expertise
Collate data on waterway level and flow by means of hydrometric
stations located throughout Québec.
Provide the hydrologic and hydraulic expertise required for water
management, defining flood zones on waterways that are at risk of
flooding, applying the Environment Quality Act and calculating
Develop simulation and forecasting models for the flow of selected
waterways, snow melting and runoff, especially aimed at providing the
MDDELCC with the expertise needed for public dam management and providing
civil security authorities with essential information during floods.
These models also enable the study of various aspects of quantitative
water management, including those that are related to the impact of
Operating Public Dams
- Determine and execute manoeuvres required to regulate water flow and
maintain water levels in accordance with the use of dams and reservoirs.
- Assess public dam security and coordinate action during emergencies.
- Using visual inspection and measuring devices, detect anomalies that
could impair normal dam function and security.
- Perform all maintenance required to ensure the functional capacity
of all structural, mechanical, computer and developmental components of
dams under its authority.
- Design, execute and supervise dam repairs, compliance with standards
- Decide which dams that are not essential to the government’s mandate
need to be razed for reasons of safety and the protection of the
Management of Water Property in the Domain of the State
- Manage the beds of both navigable and non-navigable waterway ceded
after June 1, 1884. This means managing land occupancy and, as required,
detecting any encroachment on public lake and waterway beds in order to
formalize occupancy by means of permits, leases, servitudes, sale or any
other required measure.
- Provide any expertise required for the regulation of lands in the
Domain of the State that are occupied or flooded by water retention
- Perform surveys and prepare legal documents required for
investigations under the Environment Quality Act and to define the
boundaries of protected areas.
- Participate in the cadastral renovation project as landowner and
ensure rights registration and updates in the Land Register of Québec.
- Ensure the update and development of the legal and administrative
framework related to the management of water in the domain of the State.
- Control dam security by ensuring that owners comply with security
and regulatory standards, in particular by analyzing submitted maps,
specifications and studies and through dam controls and inspection.
- Prepare technical and legal documents in support of ministerial and
government decisions that deal with work authorization applications and
disclosures of corrective action stemming from security assessments of
- Inspect dams per its planned control and inspection program,
following an application or during work compliance verification.
- Ensure the update and development of the legal, regulatory and
administrative framework related to dam safety.