The City is planning to replace the aging watermains on Martin Grove Road from north of Rathburn to Lorraine Gardens. These watermains are over 75 years old, have a history of leaks and breaks, and need to be brought to a state of good repair.

For the watermain segment that will cross Mimico Creek, the City has completed a Municipal Class Environmental Assessment (EA) study to evaluate alternative alignments and recommend an alignment for the watermain to cross below the creek. Learn more under News & Updates.

The study has been carried out following the Schedule ‘B’ requirements under the Municipal Class Environmental Assessment (EA), which is an approved planning process under the Ontario Environmental Assessment Act.

A Project File report is now available for a 30-day review period starting on September 8 and ending on October 7, 2022.  See the attached Notice of Completion for further details if you have any comments or questions.

Linked above is the Martin Grove Road Watermain Municipal Class Environmental Assesssment Study report outlining the evaluation of options and final recommendations for replacement of aging watermains. The report size is 81.73 MB.

Following the review period, the City will move forward with issuing and awarding a contract for replacement of the watermain.

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A Virtual Public Meeting was held on December 7, 2020, to share information about the options that are being considered for road safety improvements on Rathburn Road and Martin Grove Road and the options for realigning the watermain below Mimico Creek.

The Virtual Public Meeting included:

  • presentations on the reconstruction of the intersection of Martin Grove Road and Rathburn Road and the watermain replacement from Rathburn Road to Lorraine Gardens.
  • a Question & Answer period

Need assistance? While we aim to provide fully accessible content, there is no text alternative available for some of the content on this page. If you require alternate formats or need assistance understanding our maps, drawings or any other content, please contact us.

Watermain Replacement along Martin Grove Road from south of Savalon Court to Lorraine Gardens
Watermain Replacement along Martin Grove Road from south of Savalon Court to Lorraine Gardens

Two existing watermains on Martin Grove Road from north of Rathburn Road to Lorraine Gardens are 75 and 88 years old and have a history of leaks or breaks:

  • 2010
  • 2011
  • 2015 (two events)
  • 2016 (two events)
  • 2018 (three events)
  • 2019 (two events)

A new replacement watermain is needed to continue serving the community and building in redundancy in the water supply network.

The new replacement watermain segment that will cross Mimico Creek requires a Municipal Class Environmental Assessment (EA) study to determine its alignment below the creek. The replacement watermain segments north of Mimico Creek to just south of Savalon Court and from just north of Rathburn Road to Lorraine Gardens will be constructed within the road right-of-way and do not require an EA study.

Environmental Assessment Study

The Municipal Class Environmental Assessment study is an approved planning process under the Ontario Environmental Assessment Act. The study to replace the watermain below Mimico Creek will follow the ‘Schedule B’ process which includes opportunity for public input.

Environmental Assessment Study process for Schedule B proejects
The Environmental Assessment study process for schedule B projects includes the following steps: identify problem and opportunity; research the natural, socio-cultural, economic and environmental conditions; identify alternate solution(s) and develop evaluation criteria; evaluate solutions and select the preferred solution; complete final report and 30-day review period. This study is currently at the step to evaluate solutions and select the preferred solution.

Evaluation

The following alternative solutions have been evaluated:

#2 Below Bridge & Inside ROW #3 West of Martin Grove Road/Bridge #4 East of Martin Grove Road/Bridge
Natural & Environmental Moderate Impact Greatest Impact Least Impact
Socio-Cultural Moderate Impact Least Impact Moderate Impact
Technical (Constructability, Alignment & Impacts) Highest RIsk High Risk Low Risk
Economic Highest Cost High Cost Lowest Cost
Summary Significant potential of equipment failure resulting in additional costs Affects the most trees and includes high risk of equipment failure resulting in additional costs Moderate tree and park access impacts. Construction method is capable of constructing this alignment

Preferred Solution

The City is recommending that the watermain be installed east of Martin Grove Road/Bridge (#4). This solution:

  • poses the fewest construction risks and impacts
  • has an alignment within the recommended use of a specialized drill
  • does not impact the bridge’s structure or maintenance
  • does not impact other underground utilities

This solution may require the removal of up to five trees (which will be replaced) and may require intermittent closures or detours around the worksite in Ravenscrest Park (details to be confirmed after study completion).