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Utilities Kingston website

Trunk Sanitary Sewer Rehabilitation

Project background

In 2018, Andrews Infrastructure completed inspections of the City of Kingston’s trunk sewer network.  The study identified deficiencies of various types, including both "structural" and "service" in nature.  Structural deficiencies include problems with the pipe itself, including pipe joint defects, longitudinal and circumferential cracks, and holes.  Service deficiencies include issues that reduce flow capacity, including debris, sedimentation, root masses, encrustations and infiltration.

Deficiencies were classified in alignment with NASSCO PACP structural and service condition grades from 1 to 4 (no 5’s were observed).  This means that deficiencies observed range from minor to severe, but not emergencies.  This has allowed time for adequate project planning to procure full-scope services to remedy deficiencies that are moderate to severe in nature.

The defect grading system works approximately like this: 1 = minor and 5 = major failure, with 2, 3, 4 for in-between.

At this time, the majority of pipes inspected rank 1 or 2 overall, but there are numerous defects individually graded 3 (numerous) and 4 (several) that are more urgent and are the subject of this project.  

Services affected

  • Wastewater

Planning

The planning work was completed by Andrews Infrastructure (2018) as described above.

A Request-for-Proposal (UK-20-26) was issued in October 2020.   As a result of this proposal call, the project was awarded to Capital Sewer Services Inc.  

More specific project planning is currently underway with Utilities Kingston and Capital Sewer Services.

Design and Construction

Contractors are responsible for designing and "constructing" all aspects of this project.  This includes the following:

  • Design and construction of appropriate temporary access routes to maintenance holes.  This may include construction of temporary gravel roads for equipment access to select locations, and subsequent removal and restoration (in most cases).  In other cases, temporary lay-down mats and other provisions may be adequate.
  • Design, construction, operation and maintenance of temporary flow control systems.  Flow control will be required to reduce flows in the sewer such that rehabilitation work can be completed.  In the majority of cases, this will include the temporary use of pumps and surface piping to allow for temporary diversion of sewage from the pipes being rehabilitated.  These flow control systems will require design by an Engineer licensed in the Province of Ontario and will require plans for successful operation, maintenance and redundancy to minimize the possibility of sewage backups, overflows and/or spills.
  • Selection of an appropriate rehabilitation methodologies and execution of the rehabilitation. Rehabilitation will not appear as traditional "open-cut" construction.  The majority of work will be completed using a suite of techniques that fall under the category of "trenchless" rehabilitation.  Trenchless work is less intrusive in that the pipe does not need to be dug up and exposed, which considerably reduces the impact and duration of work.  Instead of digging, the contractor will access the pipe via the upstream and downstream maintenance holes and utilize a variety of robotic equipment to complete the rehabilitation work.  In some cases, digging may be required.  The types of methodologies are expected to include:
    • Sewer flushing - high pressure jets are used to mobilize sediments and debris for extraction at a maintenance hole and subsequent disposal.
    • Camera (CCTV) inspection - CCTV cameras on crawlers are used to view work in progress and success of the work.  
    • Reaming & Cutting - for obstructions or debris that cannot be removed by flushing, such as protruding connections, tree root masses, encrustations and heavy grease accumulations, reaming equipment of various types can be used, including chain flails and robotic cutters.
    • Grouting - where leakage is observed in the sewers, grout can be injected into voids, under pressure, until leakage stops.  This is commonly used at pipe joints with failed or non-existent seals, or at service connections.
    • Cured-in-place-Pipe (CIPP) - CIPP is a method of installing a liner that fits inside the pipe and is expanded to the pipe wall. It is pre-impregnated with a resin, which is cured once the liner is installed, by hot water, steam or UV light.  This can be done on a small scale (a spot repair), or full-length from maintenance hole to maintenance hole.
  • Restoration.  After all works are complete, restoration will be required where works have impacted property and/or the environment.  In some cases, access routes may be left in place (pending owner approval) to improve the long-term accessibility and maintainability of the trunk sanitary sewer pipe network.

Schedule and Project Downloads

Progress Update/Schedule (May 20, 2021):  

  • Works commenced on the North End Trunk Sewer and progressed from Bath Rd at QueenMary northwards through the path/easement, across Princess St and ended at the Sir John A McDonald railway overpass north of John COunter.  Works are still required on the North End Trunk Sewer from the SJAM overpass to Dalton at St. Remy.
  • Some preparation work was completed on the King Street Trunk Sewer, on King Street West between Beverly and Lower University.  Additional works around KGH are pending.
  • Due to future time constraints, work has shifted to the Harbourfront Trunk Sewer, near City Hall, on Ontario St between Johnson through to Princess St.  This is commencing next week with some setup taking place on Thursday and Friday, May 20 & 21.  This work will take approximately 1-2 weeks and will involve lane closures, partial road closures and traffic control.  It has been advanced to capitalize on the lower traffic during the lockdown.
  • Work will then shift back to the King St Trunk Sewer near KGH in early June.

Progress Update/Schedule (June17, 2021):

  • Significant challenges have been encountered working downtown Kingston.
  • Work will proceed the week of June 21st, starting on St. Remy place for approximately 2-3 weeks.  There will be minor interruptions to traffic flow at St. Remy Place and the K&P Trail.
  • After that, works will likely proceed adjacent to Bath Rd near McEwen Drive, and last for 2-3 weeks.

Progress Update/Schedule (September 23, 2021):

  • Trunk cleaning continues and rehabilitation efforts are commencing on cleaned lines.
  • Majority of work has focused on the North East Collector along Taylor Kidd Boulevard, the North End Trunk Sewer on St. Remy and now work is proceeding off-road into the Rideau Heights Collector Sewer between Montreal Street and the railway tracks.
  • Works in downtown Kingston are still being planned for October/November.

Progress Update/Schedule (November 18, 2021):

  • Capital Sewer Services will be completing the last of the outstanding works along St. Remy Place prior to demobilizing for the winter.
  • Works will recommence in 2022.  Works in downtown Kingston were deferred until the spring.

Contacts

Contact information can be found below.

If there are any immediate concerns that need to be addressed, please contact either Jake Brown (Utilities Kingston inspector) or Jorge Moya (Capital Sewer Service's Project Manager).  See contact information below.  If the contractor is on-site at the time of any incidents or concerns, please don't hesitate to speak with them.

For any non-urgent questions or general concerns, please contact Mike Fischer (Utilities Kingston's Project Manager).  

Utilities Kingston
Mike Fischer, P.Eng.
Utilities Engineer
85 Lappan's Lane
Kingston, ON K7L 4X7
Office: 613-546-1181, extension 2356
Email: mfischer@utilitieskingston.com
Utilities Kingston
Jake Brown
Engineering Inspector
85 Lappan's Lane
Kingston, ON K7L 4X7
Cell: 613-888-4566
Office: 613-546-1181, extension 2338
Email: jbrown1@utilitieskingston.com
Capital Sewer Services
Jorge Moya, B.Eng.
Project Manager
31 Keyes Crt.
Woodbridge, ON L4H 4V6
Cell: 437-214-2287
Office: 905-266-1500, extension 1037
Email: jmoya@capitalsewer.com
Capital Sewer Services Inc.
Brian Ratchford, CET
Chief Operating Office
31 Keyes Crt.
Vaughan, ON L4H 4V6
Cell: 905-870-3788
Office: 905-266-1500
Email: bratchford@capitalsewer.com