The White Rock Operations Building is a low-rise office building in the City of White Rock. An extensive green roof was installed and planted in 2003 to serve as demonstration, for stormwater mitigation, and for the building’s LEED Gold certification. In 2007, the Centre for Architectural Ecology instrumented, calibrated and begun monitoring the 135 m2 (1,450 ft2) extensive green roof for its effectiveness as a stormwater source control tool. For the building proper, results will translate into a post-occupancy evaluation.
The arrangement with White Rock allows the Centre to assess the impacts of maintenance on stormwater runoff quality over time. With funding from Environment Canada’s (EC) Georgia Basin Action Plan, this project is also exploring how the hydrological parameters of the growing medium affect the water holding capacity of the green roof. Long term observation is required for any real significant trends to be identified.