April 16, 2018

Preventive measures in case of flooding

For the moment, the level of Lac des Deux-Montagnes has not reached the minimum flood threshold established by the Ministry of Public Security. Rest assured that City of Deux-Montagnes authorities remain vigilant in keeping a careful eye on the level of the lake.

The City of Deux-Montagnes has obtained permission from the Ministry of Sustainable Development, Environment and the Fight Against Climate Change to install, if necessary, a temporary dike in the event that floodwaters threaten certain areas of the city as they did last year.

The temporary dike consists of a cofferdam made of concrete blocks and a flexible polyethylene membrane. The geomembrane is weighted using sandbags in front and on the block structure.

The temporary dike would be set up at intersections between different walls built on residential lots.

The City of Deux-Montagnes has acquired 1700 concrete blocks to build the temporary dike. These blocks are currently stored in public areas close to Lac des Deux-Montagnes. An installation protocol is planned so that public works staff can quickly install the cofferdam.

The permanent dike solution is still under study by the Ministry of Sustainable Development, Environment and the Fight Against Climate Change. Progress is being made on the file following impact and feasibility studies commissioned by the city that have now been passed on to the ministry.

As you may recall, a special intervention plan (PPI) in case of flooding was developed by an expert firm to maximize the speed of emergency services interventions.

The City of Deux-Montagnes will keep residents up to date on the flood situation on our website, on electronic signs, in newsletters, through an automated call and through onsite visits by emergency services.