June 24th, 2020 |  2:00 PM - 3:00 PM EST


Trunk sewers, as with other parts of the water and wastewater infrastructure system, are approaching the end of their designed service life. Many Canadian municipalities have developed asset management plans to renovate these critical infrastructure assets, as they have been experiencing increased storm and flooding events. Trunk sewers are critical parts of the wastewater infrastructure system, as they are typically installed deeper than other utilities. Therefore, their collapse can cause serious damage to other buried utilities, roads, and public properties. Trenchless technologies are proactive solutions that are deployed to renovate and rehabilitate trunk sewers and avoid significant financial, social, and environmental costs. 

This webinar will provide an overview of two challenging renovation projects of large diameter trunk sewers in the City of Toronto. The first presentation will be the "Rehabilitation of Trunk Sewers in Mimico Creek Ravine" by Marya Jetten from Jacobs, and the second presentation will be the "Reflections on the Successful Sliplining of the Humber Sanitary Trunk Sewer" by Mariana Balaban from the City of Toronto. The speakers will discuss the technical and environmental challenges faced during their projects and present strategies and innovative solutions selected to overcome those challenges and successfully deliver the projects.

Who should attend?

Municipal engineers, technicians, consultants, contractors, suppliers, and anyone involved or interested in learning more about the challenges in rehabilitation of trunk sewers using CIPP and sliplining technologies.


What's included?

  • CEU's available upon request only -  Please email with all inquiries.



Marya Jetten, P.Eng

Project Manager & Engineer, Jacobs

Marya Jetten is Jacob's Lead for Condition Assessment and Rehabilitation Solutions in Canada. Her recent expereince includes rehabilitation of over 15-km of large diameter sanitary trunk sewers with methods including cured-in-place pipe, sliplining and panel-lining. 


Mariana Balaban, P.Eng.Ph.D

Senior Project Manager, Engineering and Construction Services

City of Toronto

Mariana Balaban is professional engineer with over 30 years of design and construction expereince in Europe and Canada. Mariana holds a doctorate degree in civil engineering with a major in wastewater collection and treatement. Over the last nine years, in her capacity as a senior project manager with the City of Toronto and York, she successfully delievered numerous challenging projects employing trenchless technologies such as CIPP and sliplining of sewer systems. Some of these projects are:

  • Humber Sanitary Trunk Sewer Rehabilitation (Large Diameter Sliplining)
  • South Mimico Sanitary Trunk Sewer Rehabilitation (CIPP of Trunk Sewer)
  • York Region's Inflow and Infiltration Reduction Program (CIPP of Local Mainline and Laterals Rehabilitation)




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