It’s been a busy few years at the Ashbridges Bay Treatment Plant (ABTP) where the outfall is being upgraded to better handle storm surges and population growth demands, but the end is in sight. The ABTP is the second largest plant of its kind in Canada and one of the oldest, dating back to 1917 with the outfall constructed in 1947. It is one of Toronto’s four water treatment plants. The scope of the work is complex and extensive, adding a new outflow pipe to take discharge further into Lake Ontario after treatment by a new ultra-violet sanitization system.