Central Parkway - Credit Valley Conservation

Central Parkway
Location: Mississauga
Constructed: Fall 2014
Project Overview
The Central Parkway low impact development (LID) road retrofit is located on Central Parkway East, south
of Burnhamthorpe Road East in Mississauga, Ontario. The Central Parkway project utilizes a DeepRoot
Silva Cell bioretention system within the existing road median. Runoff flows from the road towards the
existing catch basins and into the tree-lined landscape feature. In addition to providing aesthetic
improvement, the tree-lined landscape feature provides stormwater filtration and bioretention from
impervious surfaces before entering Cooksville Creek and Lake Ontario.
Silva Cells
Silva Cells are specially designed soil cells that
provide stormwater management. Road runoff
collected in the catch basins is directed
throughout the system through two distribution
pipes. The water filters through the soil to
remove excess nutrients.
Water is either stored in the soil pore space or
taken up by the trees and shrubs. Any remaining
water is discharged to the storm sewer system
through an underdrain pipe at the base of the
© Credit Valley Conservation 2016
Infrastructure Assessment
The successes achieved with this project include:
CVC is working with an expert advisory committee
consisting of municipalities, regional government,
MOECC, consultants, universities and industry to
assess the performance of the LID features at
Central Parkway. Objectives include:
Innovative project – This is the first project in
Mississauga where the Silva Cell system has been
specifically used to improve stormwater quality and
reduce runoff in addition to encouraging tree growth
and esthetic design.
Joint partnership – A partnership was formed
between the City of Mississauga and CVC. This
partnership allowed the City to maintain the LID
infrastructure, and CVC to provide design and
construction assistance CVC is also conducting
Demonstration showcase – The LID features at
Central Parkway have been showcased through
numerous presentations, events and site tours.
These efforts have helped educate numerous
stakeholders on the benefits of LID.
Design Criteria – This site is designed to achieve
the maximum stormwater treatment benefit by
taking full advantage of the available void space
provided by the Silva Cells and bioretention soil
media. This feature cools stormwaterMonitoring
that has been
heated travelling along pavement, Fact
and filters
water to remove pollutants before it enters nearby
Cooksville Creek.
• Assess the water quality and quantity
performance of LID technologies.
• Evaluate the long-term maintenance needs and
the impact of maintenance on performance.
• Determine the life cycle costs for the LID
• Demonstrate the degree to which LID mitigates
urban thermal impacts on receiving waters.
• Meet the objectives of CVC’s monitoring strategy
report (available at www.bealeader.ca).
Performance Findings
CVC is currently conducting performance
monitoring at the inlet and outlet of the system.
Preliminary findings show that the site is
• 97% average volume reduction
• 96% average peak flow reduction
This feature replicates a more natural water
balance in a highly urbanized setting, providing
improved water quality, and protection of aquatic
Site before and during construction
Proud Partners
© Credit Valley Conservation - May 2016
© Credit Valley Conservation 2016