Pilot project to help manage and treat storm water run-off
By Michelle Nash, Ottawa Community News
New landscaping features being installed along Sunnyside Avenue aim to help better redistribute storm water in Old Ottawa South.
The "green street" measures on Sunnyside are a part of a larger project focused on creating traffic calming measures for the area, based on the Old Ottawa South area traffic management study, which was completed in 2012. Right now, construction is underway to narrow of the streets, add crosswalks and curb extensions.
Senior project manager Darlene Conway said the city added the idea to build "rain gardens" to the project to improve water quality and reduce runoff into the Rideau River.
"Really it's the genesis between city staff," Conway said. "(As part of) the study completed in 2012, we coordinated with that group because we wanted to do some storm water management because it's an old neighbourhood and currently water goes into Rideau River untreated."
According to the city, rain gardens are planted in areas designed to improve water quality and reduce run-off using a combination of soil, plants, and mulch to treat and absorb storm water run-off. They can be combined with boulevard extensions to serve multiple purposes, including traffic calming, improved aesthetics and storm water management.
There will be three rain gardens, one each at the intersection of Sunnyside and Leonard, Rosedale and Grosvenor avenues. The gardens will trap-capture dirt run-off from the road, which will be treated by the plants and soil and then can safely overflow into the sewer, eventually making its way to the Rideau River.