City of Sainte-Catherine - Repairs to the municipal wharf including reconstruction of the boat launching ramp

The west wall as well as the north end of the wharf will be stabilized by adding 300-500 gauge stones on a geotextile applied to the natural bed of the watercourses. The riprap surface is estimated at around 430 square meters.

The stabilization of the low wall on the east side, adjacent to the launching ramp, will be achieved by adding a prefabricated concrete retaining wall. The foundation of the new erosion protection wall will be located at a minimum lateral distance of approximately 1200 mm from the wall of the existing wharf in order to allow the contractor to ensure the stability of the wharf during the completion of the work. Depending on the soil conditions, the foundation of the erosion protection wall will either be installed directly on a dense till following excavation and leveling work, or installed on buried recycled concrete blocks, resting on soil of good bearing capacity. The installation of buried blocks requires the completion of work in phases. Indeed, excavation trenches no more than 3 meters in length at a time can be made below the level of the existing earthworks in the watercourse. The space between the new erosion protection wall and the existing wharf will be filled with 100-200 caliber clean stone.

The concrete blocks at the end of the eroded wharf which are now overturned and deposited on the bed of the watercourse will either be removed or buried under the projected stone. To remove them from the watercourse, the contractor may need to demolish the concrete blocks on site to split them into smaller sections to facilitate transport.

The access ramp will be demolished and rebuilt. It will be longer and wider than the original access ramp. This will consist of 18 precast concrete slabs representing a total area of ??around 170m2. The tiles will rest on a bed of clean stone and geotextile membrane.

The bank will be redeveloped to provide access between the shore and the new boat ramp. The development includes earthworks as well as the demolition and reconstruction of sections of concrete curbs.

Residual materials will mainly consist of concrete demolition residues from the existing launching ramp as well as material excavated in the watercourse for the installation of recycled concrete foundation and riprap.

To carry out these activities, the contractor is expected to use hand tools, hydraulic shovels with circulation on the wharf, on the banks and in the watercourse east side of the wharf for the construction of the protective wall against erosion and north and east sides of the wharf for the removal of upside-down walls in the watercourse.

Disclaimer

This map is for illustrative purposes. The markers represent the approximate locations based on available data. More than one marker may be identified for a given assessment.

 

Latest update

August 19th 2021 - The public comment period on the project is closed. Transport Canada is considering comments received to help inform its determination on whether the carrying out of the project is likely to cause significant adverse environmental effects..

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Contacts

Environmental and Aboriginal affairs - Québec region
Email: aea-eaa@tc.gc.ca


  • Location

    • City of Sainte-Catherine (Quebec)

  • Nature of Activity

    • Ports and Harbours

  • Assessment Status

    In progress

  • Start Date

    2020-05-08

  • Proponent

    City of Sainte-Catherine

  • Authorities

    • Transport Canada

  • Assessment Type

    Project on federal lands

  • Reference Number

    80671

Nearby assessments

..within 200 kilometres
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