Rehabilitation of the Potable Water Treatment Plant, Gatineau Sector (Civil)

  • Nordmec Construction
  • 2025- Ongoing

  • Gatineau, Québec

This project covers the civil works portion for the expansion and increased production capacity of the Gatineau sector Potable Water Treatment Plant (DWTP).

The work carried out included:

  • Installation of sheet pile retaining walls for four (4) sectors;
  • Excavations up to six to twelve meters deep for the construction of new structures;
  • Management and disposal of contaminated soils found on site;
  • Management and treatment of excavation water before discharge into the city’s network;
  • Driving over 200 piles for the deep foundations of the new reservoirs and contact basins;
  • Installation of a 65-meter-long steel casing, 1,800 mm in diameter, at 12 meters depth beneath Saint-Louis Street for the new 1,200 mm reinforced concrete raw water pipe;
  • Supply and installation of a 12-meter-deep concrete intake chamber weighing over 250 tonnes;
  • Rehabilitation of underground services, including sanitary sewers, storm sewers, and water networks on the plant site;
  • Renovation and leveling of the entire site, including curbs, sidewalks, pavements, concrete slabs, interlocking pavers, landscaping, and plantings.

Project highlights:

  • Complex retaining and excavation methods;
  • Management, excavation, transport, and disposal of over 45,000 metric tonnes, including more than 15,000 metric tonnes of contaminated soil;
  • Installation of a new raw water pipe using trenchless methods at a depth of 12 meters;
  • Execution of work while maintaining the plant’s water production;
  • Strict schedule management imposed by the City.