By Will Soutter
Mark Eitzen, General Manager of Gunderson LLC, and Portland City Commissioner, Dan Saltzman, donated a habitat roof measuring 2400 sq. ft. to the Gunderson facility on Front Avenue on July 23.
Commissioner Saltzman (center) with Gunderson LLC employees and visitors. (PRNewsFoto/The Greenbrier Companies, Inc. (GBX), Gunderson)
The roof was fabricated and put in place by Gunderson’s workforce and is about two and a half times the size of the first roof donated in June 2011. This achievement adds to Gunderson’s endeavour to arrive at the habitat value that can be acquired from such roofs.
Mark Eitzen acknowledged the perception gained regarding what can be done on-site to improve habitat, and the grade of stormwater discharge that can be achieved with habitat roofs. He added that their work is based on the foundation of knowledge created via the Ecoroof Program of the City of Portland’s Bureau of Environmental Services (BES).
The Gunderson habitat roof follows many of the design data that are part of the BES Ecoroof Handbook. The design and plantings of the roof also had the advantage of the combined work of dedicated personnel of the local Greenroof Info Think-tank (GRiT). Gunderson is paving the path for the use of habitat roofs in industries. Design and fabrication of a third habitat roof is on-going and it will be an initial attempt to convert part of an already existing roof.
Armed with the experience of their first three roofs, Gunderson will decide on the feasibility of creating habitat value to over 900,000 sq. ft. of an existing roof on the current site.