Elm Drive, Mississauga
This road right-of-way retrofit improves stormwater management through implementation of Low Impact Development (LID) practices in Cooksville Creek. The retrofit includes implementation of permeable parking laybys and sidewalks and a series of rain gardens (bioretention planter boxes) along Elm Drive in front of the Peel District School Board Adult Education Centre South. These rain gardens are located on school property yet treat urban runoff from the road to filter out pollutants so cleaner water enters Cooksville Creek and eventually Lake Ontario, our drinking water source. This project spans school and city property and resulted in a unique partnership among CVC, the City of Mississauga and the Peel District School Board. It provides municipalities an alternative option to reconstructing roads with conventional curb, gutter, and buried sewer and is more cost effective and better for the environment.
Innovative Clean Water Technologies
A series of rain gardens urban runoff is collected and treated in a series of rain gardens (bioretention planters) connected to each other by a perforated pipe. Runoff is piped from the adjacent permeable pavement catch basins.
Specially designed paver stones with spacing bars that create gaps or joints between the stones, laid on top of engineered soil. Permeable pavement collects urban runoff from Elm Drive filtering out pollutants through the engineered soil and some is piped to the rain gardens for cleaner water to enter our waterways.
- Construction is complete
- To collect samples from 20 storm events before December 20, 2013
Monitoring objectives for the Elm Drive LID site include:
- Evaluate the performance of LID practices in reducing runoff volume, peak flows, pollutants, erosion, and restoring the natural water balance
- Help determine maintenance requirements for optimal LID performance
- Evaluate the degree to which LID reduces the impacts of extreme weather events due to climate change and builds resiliency in municipal infrastructure
- Meet the objectives of CVC’s monitoring strategy report
Since August 2011, for rain events up to 14 mm, no outflows have been observed leaving the LID infrastructure. In other words, roughly 56% of all rainfall events are being filtered and cleaned before entering Lake Ontario. Between August 2011 and September 2012 1.9 million litres of stormwater has been stored and infiltrated by the Elm Drive site. That is enough water to fill 1.3 Olympic sized swimming pools.
See the latest Monitoring Report for Elm Drive below for more information on Monitoring Progress.