Vaughan Stormwater Management
Owner:City of Vaughan
Engineer:McIntosh Perry and Hatch
Contractor:King Cross Contracting Limited
Location:Vaughan, ON
Product Utilized:
HydroStor® Stormwater Chambers
The Challenge
One of the challenges of urban development is managing increased stormwater runoff generated by paved surfaces and its potential to cause flooding, increase erosion, and decrease water quality. The City of Vaughan selected underground stormwater storage chambers to mitigate this problem. The project scope specified a volume of 535 cubic meters, a deep burial depth of 3 meters, and a Total Suspended Solids (TSS) removal target set out by the Ministry of Environment, Conservation and Parks (MECP).
The Solution
Armtec was asked to provide an alternative option to the stormwater chamber unit originally specified. The HydroStor HS180 was proposed as an equivalent product but first had to be approved by MECP and the consultants Hatch and McIntosh Perry. Armtec worked with Hatch, McIntosh Perry and MECP to demonstrate equivalency not only in structural integrity and achievable volume, but also in end of pipe water quality treatment capabilities. MECP reviewed the technical documentation supplied by Armtec and determined that the HS180 was equivalent in its function. It also offered slightly more storage volume per unit with less weight allowing for easier handling. The system was designed using the HydroStor HS180. It included 90 chambers in total plus a sediment isolation row. In order to achieve the 3 meter deep burial requirement while maintaining structural integrity, the thickness of the stone foundation was increased from 225mm to 275mm. The HydroStor HS180 delivered cost savings for the owner and contractor. A quick lead time ensured the project was completed on schedule.
