[This post was written by Michael Aitchison, Donovan Jackson, and Stephanie McCarthy. The post is in response to our tour of the Jean Vollum Natural Capital Center and complements previous students’ analysis of the question What is Sustainability?]
Jean Vollum Natural Capital Center
On June 30, 2011 our class conducted a self-guided of the Jean Vollum Natural Capital Center, also known as the Ecotrust Building, located at 721 NW 9th Avenue, in Portland. One of the building’s many ecofriendly features is its ecoroof. Unfortunately, we were unable to view the roof, but the information in our field guide piqued our interest. Ecoroofs are not only beautiful to look at but they also make real environmental and economic sense. Ecoroofs greatly extend the lifespan of a roof, reduce stormwater runoff, and also reduce energy consumption by decreasing rooftop heat loss. The vegetation planted on the ecoroof at the Jean Vollum Natural Capital Center was carefully selected from Pacific Northwest native plants and seeds. These native plants, a mix of grasses, wildflowers, and succulents, are drought tolerant and once established need very little watering and maintenance. The ecoroof is part of the sites stormwater management system that helps to minimize rainwater runoff, including pollutants and sediment, from flowing into the Willamette River. This stormwater system, which also includes bioswales, captures at least 90% of the rainwater falling at this location. The system is funded in part by the City of Portland’s Bureau of Environmental Services.
What is a green roof?