Landscape Architect & Specifier News

JAN 2019

LASN is a photographically oriented, professional journal featuring topics of concern and state-of-the-art projects designed or influenced by registered Landscape Architects.

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Green Incentives Chicago, an early supporter of green roofs (its city hall, under the directive of then-mayor Richard Daley, had plants installed on its topside in 2000), not only offered an expedited permitting process to developers who incorporated green roofs in their plans, they also allowed the square footage of the roof to be counted toward any pervious surface area requirement. Portland was another early adopter, officially recognizing vegetated roofs as a stormwater best management practice in 1999. To promote their inclusion on commercial and residential structures, the city began, in 2008, offering grants of up to $5 per square foot, which amounted to about 50% of a project's overall cost according to industry specialists. The Regional Green Roof Initiative in Milwaukee provided funding for up to $5 per square foot of approved green roofs on properties that were within the city's sewerage district. In 2006, Philadelphia created a new stormwater manual that contained recommendations for green roofs. The city offered stormwater fee credits for buildings that met the conditions defined in the manual, and a business tax credit of 25%, up to $100,000, of eligible green roof construction fees. Top: Urban Associates, Inc. as a sub- consultant to CDM Smith, designed the landscape at the Administration and Visitor Center at the Solid Waste Authority located in West Palm Beach, Florida. It was officially certified LEED Platinum by the USGBC and features an 8" to 14" depth intensive green roof planted with native coastal perennials and shrubs. As per design, the first flush runoff from the non-green portion of the roof is directed to a rain garden to provide stormwater quantity and quality treatment. Bottom: A 16'-high "green screen" planted with jasmine was planned for the west face of the Administration and Visitor Center to reduce the heat island effect from the afternoon sun. January 2019 51

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