LRT Stage 2 – Confederation Line East Extension
The Confederation Line East Light Rail Transit Extension (O-Train) project will help alleviate pressure on transit systems from population growth by improving transit and providing a useful tool for building and achieving environmental, social and land-use objectives, thereby ensuring that Ottawa remains an economically viable, livable city.
The project consists of managing water from the 27-kilometre extension of the East-West Confederation Line with 16 new stations. The project also includes 3.4 kilometres of cut and cover tunnels and significant widening of the highway and other structures.
Capacity - System 1 : 100 m³/h
Capacity - System 2 & 3 : 11 m³/h
Challenges
- The quality of water extracted from the site is variable and unpredictable, and must comply with specific City of Ottawa discharge criteria.
- The lack of a dedicated, specialized water management operator requires the implementation of a simple, understandable treatment system; accessible technical support; and training for the site’s water management team.
- The space available for water treatment and settling is limited due to the urban nature of the sites.
- Additives in the water extracted from the site, such as foaming agents, hydrocarbons and concrete, make treatment more challenging.
Outcomes
- Keep release of water at an acceptable level in accordance with City of Ottawa environmental standards.
- Ensure there are no site shutdowns resulting from non-compliance of released water after treatment.
- Save on specialized operational labour.
- Shorten the learning curve for site water treatment operations and improve overall performance.