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 initiated a Municipal Class Environmental Assessment (EA) study that will follow the ‘Schedule B’ approach to evaluate alternative alignments and recommend one to cross below the creek.
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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:
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:
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.
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.
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|
The City is recommending that the watermain be installed east of Martin Grove Road/Bridge (#4). This solution:
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).