“Soilless” System with Bioberm™ graces Victoria’s McLoughlin Water Treatment Plant

Aerial photo of green roofs on Mclouglin Point Water Treatment PlantCRD’s Largest Infrastructure Project

Mclouglin Wastewater Treatment Plant boasts a 1700 sqm Green Roof

AECOM and Graham Construction have successfully completed the first wastewater treatment plant in Victoria, British Columbia.

The McLoughlin Point Wastewater Treatment Plant provides tertiary treatment for wastewater from Victoria, Esquimalt, Saanich, Oak Bay, View Royal, Langford, Colwood, Esquimalt Nation, and Songhees.

The plant’s relatively small footprint incorporates elements that promote sustainability and energy efficiency and is built to LEED Gold certification requirements. The sustainable design elements include a 1700 square metre green roof.

BioBerm™ Brings Biodiversity

The McLoughlin Treatment Plant includes BioBerm™s.  They are rounded mounds of growing medium on the otherwise level “soilless” green roof. BioBerm™s offer a natural, seamless way to combine extensive and intensive systems on one roof. This not only adds visual interests but supports a greater variety of plants. It also allows for greater choice of habitat for a wider range of wildlife. Biodiverse roofs can contribute up to 2 points under LEED v4.1 “Sustainable Sites – Protect or Restore Habitat”.

Raw sewage no longer flows into BC waters

The McLoughlin Point Wastewater Treatment Plant replaces an old plant and now treats up to 108 megalitres of wastewater per day. That’s the equivalent of 43 Olympic-sized swimming pools.

The “soilless” green roof has no loose growing media. Because it requires minimal fertilization, there is no leaching and minimizes the impact on the surrounding landscape and the ocean.

Minimal Fertilization, No Leaching

The new Macaulay Point Pump Station is constructed of wood and is mostly below-grade, increasing green space for the community. In keeping with the sustainable design, the one storey above ground is made entirely of B.C. wood. The pitched roof that slopes toward the ocean has a low maintenance “soilless” green roof that requires minimal fertilizer. Therefore, there is no leaching.
The green roof and ground level landscaping beautifully integrates the building with the surrounding area. The design transforms an almost entirely impermeable lot into an environmentally-rich, park-like setting with public amenities.


More than 2M SQFT supplied coast to coastNext Level Stormwater Management logo in bold blue with logo above in blue and green

Next Level Stormwater Management  is Canada’s leading supplier of pre-vegetated roofs such as LiteN’Less™, Xeroflor® and StormCap™ systems. We customize to local requirements and offer warranty and maintenance support. Our team provides analytical support such as ​stormwater calculations specific to location ​and building/roof type. As a Purple-Roof partner, Next Level Stormwater Management has access to the latest green roof stormwater test data and related innovative hydrologic modeling tool.

Email or call (416) 637-5772 Ext 1 for stormwater calculations specific to your project.Urbanscape Detention logo by Knauf Insulation

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