South Unionville Square

A large concrete structure being lowered into the ground by a crane at a construction site, with workers guiding the placement.

Concrete culverts being constructed in a dirt excavation site, with multiple rectangular sections and a clear sky in the background.

Large precast concrete stormwater infiltration system modules installed in a construction site, surrounded by black geotextile fabric, with earth-moving equipment and houses in the background.

Construction site with large concrete structures being assembled in an excavated pit, covered by black tarp. Workers and machinery are visible, with houses in the background.

Product(s) Used:DoubleTrap

Solution:Detention

Market:Community

Location:CanadaOntario

Project Description

A DoubleTrap stormwater detention system was needed to replace an existing stormwater detention pond under a local park in the South Unionville neighborhood of Markham, Ontario.

Challenge

The main challenge of this project was to meet the Ontario Ministry of the Environment and Climate Change guideline for enhanced water quality control that requires 80% total suspended solids (TSS) removal.

Solution

StormTrap designed a full-scale underground stormwater detention wet pond, complete with a forebay and a permanent pool of water under the complete stormwater detention area. The system achieved 82% removal efficiency for TSS.