Renovation of D'Isère Avenue and De Namur Street

Renovation of D'Isère Avenue and De Namur Street

In the summer of 2026, the Ville de Saint-Lambert will carry out infrastructure work on D'Isère Avenue, between De Namur Street and Lambert-Closse Park, as well as on De Namur Street, between D'Isère Avenue and De Namur Place. A retention basin will also be installed in the green space of the Terrasse d’Isère. This will promote rainwater retention at the source while contributing to the area’s biodiversity.

These works will allow for the expansion of sections of sewer lines and the installation of surface drainage infrastructure, thereby improving rainwater retention in the area and the resilience of the infrastructure.

We are conscious of the inconveniences caused by such a major project and how they will disrupt your daily life. We would therefore like to help you prepare for the work.

Schedule

  • Early May: Work begins at the intersection of D'isère Avenue and De Namur Street.
  • Early May to mid-June: Construction of a retention basin in the green space of the D'Isère terrace.
  • Mid-May to mid-June: Work continues on De Namur Street, between D’Isère Avenue and De Namur Place.
  • Early June: Repair work on D'Isère Avenue, between De Namur Street and Lambert-Closse Park.
  • June: Work continues on De Namur Street, between Simard Boulevard and D'Isère Avenue, then on D'Isère Avenue, between De Namur Street and D'Isère Place.
  • July: Finishing work, including repairs to the driveways and landscaping damaged during construction.
  • Mid-August: Completion of the project.

The construction zone will be closed to traffic as soon as demolition begins. With some exceptions, local traffic will be permitted for residents of the construction zone.

Detours

Phase 1A: De Namur Street, between D'Isère Avenue and Simard Boulevard

  • One lane of traffic will remain open at all times.
  • During working hours, traffic will be directed by flaggers.
  • Outside of working hours, temporary stop signs will be installed to facilitate traffic flow.

Phase 1B: De Namur Street, between D'Isère Avenue and De Namur Place

  • Motorists on De Namur Place will be able to access Simard Boulevard by continuing on De Namur Street and taking D'Isère Avenue.

Phase 2: D'Isère Avenue, between De Namur streets

  • Motorists will be able to access Simard Boulevard by taking De Namur Street

Phase 2: D'Isère Avenue, between De Namur Street and Lambert-Closse Park

  • Drivers on the D'Isère terrace can access Victoria Avenue via a temporary path set up in Lambert-Closse Park and on the property at 2001 Victoria Avenue (shaded path below).
Phases travaux

Detailed work

D'Isère Terrace

A new open-air retention basin will be constructed in the green space of the D'Isère Terrace. Trees will be preserved or relocated.

D'Isère Avenue, between De Namur Street and Lambert-Closse Park

A linear underground retention basin will be installed beneath the street. Above the basin, a vegetated swale (landscaped drainage ditch) will be created. The addition of these new drainage features will require a reduction in the street’s width. Parking will henceforth be permitted on only one side of the street along this section.

In addition, during surface work:

  • the drinking water main will be relocated;
  • the combined sewer line will be replaced with a higher-capacity line.

De Namur Street, between D'Isère Avenue and De Namur Place

The work will include replacing the sewer line to increase its capacity. The street’s geometry will remain unchanged.

De Namur Street, between D'Isère Avenue and Simard Boulevard

A vegetated swale and a linear underground retention basin will replace the sidewalk on the side of 2001 Victoria Avenue. The rest of the street’s layout will remain similar to the existing one, and the asphalt will be repaved along the entire length of the section.

D'Isère Avenue, between D'Isère Place and De Namur Street

On this section, a vegetated swale and a linear underground retention basin will replace an existing sidewalk. The street layout will remain largely the same, and the roadway will be entirely repaved with asphalt.

Neighbourhood residents

The reconstruction of a street is a complex operation involving several companies, and it disrupts people’s lives. We invite you to consult the Practical information during roadwork page, which will offer practical tips to ensure your daily routine remains as unaffected as possible.

If you wish to carry out renovation work on your home this summer, we invite you to consider the inconveniences caused by this major roadwork when planning your project. Remember that, among other things, when excavation work is underway to replace the pipes and rebuild the sidewalks in front of your home, it will be temporarily impossible to access your home with a vehicle. This type of work usually takes 10 working days.

During this roadwork, the entire street will be rebuilt, including replacing the water supply mains, sewer pipes, roadway, and sidewalks. You might want to undertake certain projects, which will be easier to do at this time, such as:

Sewer pipes and water supply mains

The Ville de Saint-Lambert will replace the water supply mains and sewer pipes up to the right-of-way of your property.

If you think there is a problem with your private water supply mains or the sewer pipes that run between your home and the property line, or that they might be obsolete, this would be a good time to replace them after the end of the rehabilitation works.

Driveway

If you would like to change the configuration of your curb and driveway entrance, this would also be a good time to schedule such work. You must apply to the Urban Planning, Permits and Inspection Department for a permit before May 22, 2026 so that we can take it into account when rebuilding the sidewalks.

For more information or to plan one or more of these projects, please contact the Urban Planning, Permits and Inspection Department at 450-672-4444 or at urbanisme@saint-lambert.ca.

We invite you to contact the Engineering Management division at 450 672-4444 or submit a request via our online platform.

News

The information on this page will be continually updated. We invite you to check it regularly for progress reports on the work.

Due to unexpected breakdowns during the construction work, two additional water shutoffs will be necessary:

  • Tuesday, June 16, from 9 a.m. to 4 p.m.
  • Wednesday, June 17, from 9 a.m. to 4 p.m.

for the following addresses:

  • 836 to 876 d’Isère Avenue
  • 900 to 952 d’Isère Terrace

The preventive boil water advisory, which began following the water outage on Monday, June 15, remains in effect until further notice.Those affected must boil water for 1 minute before consuming it, until further notice.

They will receive a door hanger informing them of the situation.

The contractor will finish installing the new sewer and water mains and will continue work on the retention basins designed to improve stormwater management.

Water outage

A water outage is scheduled for Monday, June 15, from 9 a.m. to 2 p.m. affecting:

• 836 to 876 Avenue d'Isère

• 900 to 952 Terrasse d’Isère.

Once water service is restored, a preventive boil water advisory will be in effect. Affected residents must boil water for 1 minute before consuming it, until further notice.

All affected residents have received a door hanger informing them of the situation.

The preventive boil water advisory that was in effect for the following addresses has now been lifted:

  • 836 to 876, Isère Avenue;
  • 900 to 952, Isère Terrace.

It is no longer necessary to boil water before consuming it.

Affected residents will all receive a door hanger informing them of the situation.

The preventive boil water advisory that was in effect for the following streets is now lifted:

  • Place d'Isère;
  • 500 to 635 Isère Avenue;
  • Place de Namur;
  • Namur Street;
  • 2001 Victoria Avenue.

It is no longer necessary to boil water before consuming it. All affected residents will receive a door hanger informing them of the situation.

The advisory remains in effect until further notice for:

  • 836 to 876 Isère Avenue;
  • 900 to 952 Isère Terrace.

Due to an unforeseen event, the water outage announced for Thursday, June 4, from 12 PM to 4 PM, is postponed to Friday, June 5, from 12 PM to 4 PM. The addresses concerned remain as follows:

  • 836 to 876, Avenue d'Isère;
  • 900 to 952, Terrasse d'Isère.

The preventive boil water advisory currently in effect in the area remains in place until further notice. Residents concerned must boil water for 1 minute before consuming it.

Due to an unforeseen issue at the construction site, there is currently an unplanned water outage affecting all residents of Rue de Namur and Place de Namur.

Our teams are working to resolve the issue. Once water service is restored, the preventive boil water advisory will remain in effect.

We apologize for the inconvenience.

A water outage is scheduled for this Thursday, May 28, from 9 a.m. to 2 p.m., affecting:

  • Place de Namur;
  • Rue de Namur;
  • 836–876 Avenue d’Isère;
  • 900–952 Terrasse d’Isère;
  • 2001 Avenue Victoria.

Once water service is restored, a preventive boil water advisory will be in effect. Affected residents must boil water for 1 minute before consuming it, until further notice.

All affected residents have received a door hanger informing them of the situation.

As part of the renovation project on Avenue d'Isère and Rue de Namur, there is currently a water outage affecting:

  • Terrasse d'Isère;
  • Place d'Isère;
  • 500–635 Avenue d'Isère;
  • Place de Namur;
  • Rue de Namur;
  • 2001 Avenue Victoria.

Service is expected to be restored at 3 p.m. on Wednesday, May 27. Once water service is restored, a preventive boil water advisory will be in effect. You must boil water for 1 minute before consuming it, until further notice.

Please note that a second water outage is scheduled for Thursday, May 28, for certain residences in the area. All affected residents will receive a second notice to this effect.

The preventive boil water advisory that was in effect for the following streets has now been lifted :

  • terrasse d'Isère;
  • place d'Isère;
  • 500 à 635, avenue d'Isère;
  • place de Namur;
  • rue de Namur;
  • le 2001, avenue Victoria.
It is no longer necessary to boil water before consuming it.

All affected residents have received a door hanger informing them of the situation.

Due to the water outage, a preventive boil water advisory is currently in effect for :

  • terrasse d'Isère;
  • place d'Isère;
  • 500 à 635, avenue d'Isère;
  • place de Namur;
  • rue de Namur;
  • le 2001, avenue Victoria.

Residents in the affected area must boil water for 1 minute before consuming it, until further notice.

All affected residents have received a door hanger informing them of the situation.

The start of the week will be marked by the completion of preparatory work, including the installation of a temporary detour route in Lambert-Closse Park. On Tuesday, May 12, a water shut-off is scheduled, and affected properties will receive a door hanger. If the shut-off extends beyond that day, a second written notice will be distributed.

Work to replace the sewer system at the intersection of D'Isère Avenue and De Namur Street will take place throughout the week. Flaggers will be on site to direct traffic.

Work on D'Isère Avenue and De Namur Street will begin in early May. Residents in the area have all received a door hanger with important information on how to minimize the impact of this major construction project on their daily lives.

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