1. Montreal-North Shorelines

Montreal-North has undertaken the ecological restoration of a portion of its shorelines along the Rivière des Prairies.

This large-scale project aims to stabilize eroding areas, preserve wildlife habitats, increase the natural state of the sites, and improve and protect public facilities used by citizens.

Financial Support: $1.2M (

Long neglected in favor of industrial or road infrastructure, Montreal's shorelines are returning to their natural vocation.

The current flagship project is located in the borough of Montreal-North, where the ecological restoration of the banks along Gouin Boulevard marks a turning point in urban management.

The restoration project aims to stabilize the banks using soft engineering (soil bioengineering) methods rather than massive riprap (rock armor).

• Allocated Budget: A multi-million dollar envelope (integrated into the Three-Year Capital Expenditure Plan) for renaturalization and water access.

• Social Impact: In a high-density population area, secure access to the shorelines reduces heat islands and provides essential free recreational space.

2. Overview of Major Projects on the Island

Montreal is not limited to a single neighborhood; the entire perimeter is being transformed:

• Grand Parc de l’Ouest: Canada’s largest urban park (3,000 hectares). A massive investment to protect the wetlands of Pierrefonds-Roxboro and Sainte-Anne-de-Bellevue.

• Promenade de l’Anse-à-l’Orme: Restoration of fragile ecosystems and biodiversity protection.

• Plage de l’Est (Pointe-aux-Trembles): A success story in decontamination and citizen reclamation featuring modern facilities.

• Verdun and its Urban Beach: A local economic driver that has revitalized business on Wellington Street.

3. Statistics and Economic Data

The appeal of the shorelines remains strong. According to the latest attendance analyses:

• Traffic: Estimated at over 7 million annual visits to the island's riverside parks (including Parc de la Promenade-Bellerive and Parc René-Lévesque).

• Real Estate Impact: Proximity to a restored and accessible shoreline can increase the property value of adjacent homes by 8% to 15%.

• Ecosystem Benefits: Restoration reduces costs associated with spring flooding by creating natural retention zones.

4. Services Offered: A Four-Season Experience

Development does not stop when the snow melts. The city is adapting its offer to ensure constant traffic:

This ecological restoration strategy is more than just a landscaping project; it is a direct response to urban drainage and public health challenges.

By investing in its shorelines, Montreal ensures it remains attractive against competition from the suburbs while protecting its infrastructure against climate hazards.

The shift from "grey" management (concrete) to "green" management (vegetation) is the best long-term investment for the island's residential value.

Soil Bioengineering in Urban Environments

Soil bioengineering uses the mechanical and biological properties of plants to stabilize soil and prevent erosion.

Unlike rigid structures (retaining walls), these solutions are self-healing and strengthen over time.

1. Stabilization Techniques and Costs

The choice of technique depends on the slope of the bank and the strength of the current.

2. Budget Composition (Typical Breakdown)

For an ecological restoration project in Montreal, the construction budget is generally divided as follows:

• Preparation and Excavation (25%): Removal of contaminated fill or old concrete structures.

• Biological Materials (35%): Purchase of willow cuttings, dogwoods, biodegradable geotextiles, and specialized soil.

• Specialized Labor (30%): Environmental expertise and delicate manual installation.

• Monitoring and Maintenance (10%): Watering and replacement of plants during the first two years of growth.

3. Comparative Technical Advantages

The Montreal-North approach focuses on benefits that concrete cannot offer:

• Sediment Management: Roots create a dense network that "filters" runoff water before it reaches the river.

• Mechanical Flexibility: Unlike a concrete wall that can crack under ice pressure in winter, a vegetated bank is flexible and absorbs ice expansion.

• Temperature Reduction: The riverside canopy can lower water temperatures by 2°C to 4°C, favoring the survival of aquatic wildlife.

4. Maintenance and Sustainability (Winter vs. Summer)

• Winter Protection: Chosen species (such as willow and alder) are resistant to prolonged immersion and ice shove.

The deep root system maintains the structure even during winter dormancy.

• Summer Regeneration: Once established (2 to 3 years), the bank becomes practically autonomous, requiring only annual inspections after the spring thaw.

While the initial investment may appear higher than simple riprap, the return on investment is superior due to reduced post-flood repair costs and increased local biodiversity.