A PVC liner is inserted into a watermain between two manholes. Hot steam is then used to expand the liner to the width of pipe. The thermosetting resin in the liner is then cured by the steam and hardens. After cooling, the liner is now waterproof. This trenchless technology is used to stop leaks from imperfections or gaps in piping.
Progress on the train shed has stalled as the future electrification of Go Transit trains will require either modifying the overhead wiring system to fit under the shed, lowering the floor or raising the roof with the latter being the worst case scenario as it involves considerable cost and harming the historic steel structure.
The highway is closed this weekend for annual Spring maintenance.