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Project execution phases
The project is divided into two phases:
- The first phase covers the area extending from Rue St. Ulric to the Bourbon lock. Work is scheduled to begin in late 2019 and end in 2023 before the start of the LUGA 2023 horticultural exhibition.
- The second phase of work, covering the area from the Bourbon lock to Rue d'Anvers, is scheduled to begin after LUGA ends in 2024.
Following a feasibility study and extensive consultation with the relevant government authorities, the project was approved as follows:
1. Ecological redevelopment of the Pétrusse
- manage rising water levels;
- take into account the many infrastructural features located in the valley;
- and prevent any increase in terms of exposure to flooding for private land parcels located in the valley.
The concept provides for the following works:
- demolition of the existing concrete riverbed, with a moderate raising of the waterway;
- removal of one of the walls bordering the Pétrusse in some places to widen the waterway channel;
- development of a bed bottom that is more resistant to extreme stresses when the water level rises;
- construction of a fish ladder at the structure located on Rue St. Ulric
- and construction of a new retaining wall downstream of the Bourbon lock on the left bank (City side).
2. Development of the park along the Pétrusse
The park development project provides for the following works:
- construction of a 4.5-metre-wide road alongside the Pétrusse over the entire length of the valley;
- creation of a grassed area for recreational and leisure activities at the entrance to the park on Rue St. Ulric;
- installation of new play areas, including new mini-golf and sport/fitness infrastructure and other new game facilities, in the area near the existing skate park;
- installation of terraces and balconies at different locations along the banks of the Pétrusse;
- development of a path measuring 2 to 3 metres wide on the right bank of the waterway (Bourbon Plateau side), on the opposite side of the main promenade;
- and construction of six new bridges to replace existing structures (two open to vehicular traffic and four for pedestrians).
At its meeting on 8 July 2019, the municipal council is being convened to take a position on the cost estimate for phase I of the Pétrusse Valley ecological restoration project.