Read the July 22, 2011 Walmart comes to PoCo by Diane Strandberg in bclocalnews.com.
The largest greenroof in the region, the Walmart Supercentre is the first example of Port Coquitlam’s 2006 bylaw amendment that now requires all buildings over 5,000 m2 (53,821 sf) to use green technology to reduce the urban heat island effect of large buildings, boost energy conservation and promote natural stormwater management. 220,000 hand-planted sedums and succulents were planted on 113,467 sf of the Walmart Supercentre’s greenroof surface of 151,290 sf.
“The Walmart roof cost $1 million and includes a landscaped bioswale where water from the roof is channelled into a pipe, then drops 35 feet, before bouncing off a couple of boulders to disperse into an attractively-laid out rock and gravel bed below. There, it slowly percolates into the groundwater. Onni development manager Mike Mackay said the investment was significant but will be offset by reduced heating and cooling costs and the fast-tracking of the project, in which the city shortened the application process by one to two months, and shaved off some of the project’s capital carrying costs.
“It is a significant cost to the project. That said, we did experience the benefit from a more efficient building and in the approval process.”
“Mackay also pointed to other design elements built into the project to reduce its impact on the environment, such as landscaped bioswales throughout the parking lot, as well as outdoor LED lighting,” (Strandberg, 2011).