1,004 ft (306 m)
Total Length
70.9 in x 47.2 in (1,800 mm x 1,200 mm)
Diameter
$2.133 M
Total Project Value
This project involved the structural rehabilitation of an egg-shaped combined sewer 70.9 in x 47.2 in (1,800 mm x 1,200 mm) built of brick in 1909, located beneath Boulevard de Maisonneuve East in downtown Montreal. The rehabilitation method used was slip lining, where specially fabricated non-circular fiberglass reinforced polyester (FRP) liners were inserted into the existing sewer, and the surrounding annular space was filled with cementitious grout. This approach restored the sewer’s structural integrity, improved hydraulic performance, corrected physical deficiencies, eliminated infiltration, and significantly extended its service life.
The 306-meter (1,004-foot) section required careful preparation of the access shafts by the contractor, precise insertion of the liners, continuous traffic management in a dense urban setting, wastewater diversion (including blocking and pumping), site restoration, and comprehensive inspections and studies to ensure project success.
As our first project of this scale using custom non-circular FRP technology, it marked an important milestone in Novinfra's journey and it highlighted the importance of collaboration and trust among all stakeholders. The materials were delivered in two phases and the project was successfully completed by the end of 2021.
The 306-meter (1,004-foot) section required careful preparation of the access shafts by the contractor, precise insertion of the liners, continuous traffic management in a dense urban setting, wastewater diversion (including blocking and pumping), site restoration, and comprehensive inspections and studies to ensure project success.
As our first project of this scale using custom non-circular FRP technology, it marked an important milestone in Novinfra's journey and it highlighted the importance of collaboration and trust among all stakeholders. The materials were delivered in two phases and the project was successfully completed by the end of 2021.