Expressway Stormwater Management

Low Impact Development

Background Information and Challenge

An expressway stormwater management plan was required in Toronto for the Gardiner Expressway that runs parallel to the Lake Ontario shoreline in Toronto. Most of this elevated expressway was built above industrial lands, which are now part of the urban renewal projects for Waterfront Toronto. 

The Bentway expressway stormwater management development project was to include 1.75km of public spaces to connect neighbourhoods underneath the Gardiner with parks, a skating rink, a public market and theatre areas. Significant stormwater storage was required to control the high volumes running off the Gardiner down to street level through vertical pipes.


The contractor called upon Layfield to supply  Brentwood StormTank® Modules that were selected as the best option for the expressway stormwater management project. These Stormwater tanks were to be placed in two separate locations for a total storage of 190 m3. This Site is very constrained on the north and south; therefore, it was important to reduce the space of the overall system and the working area (i.e., excavation and stockpiling). The Brentwood system provided the smallest footprint and the least amount of excavation required due to the high void space of the Brentwood System.


The first Brentwood System tank area was installed in May with Layfield’s field support in less than one day. The second Brentwood System was installed in June of the same year. Overall, the partners are satisfied with the product and support from Layfield.


Find the Product You Need? Reach out to Our Team.

Click the link below to get in touch with us, and our team will get back to you promptly.