Landscape Architect & Specifier News

JAN 2018

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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Page 59 of 133

The EPA, which is committed to providing technical assistance to communities working to incorporate green infrastructure, provided contractor support for the development of the checklists in the manual. Tetra Tech prepared plan review, construction inspection and maintenance checklists, as well a number of renderings. "These BMPs are regionally appropriate landscape elements that meet EPA guidelines for removing pollutants from urban stormwater, and also reduce stormwater runoff volumes (and downstream flooding) though short- term storage, infiltration, and uptake of stormwater by plants," explains Stream Landscape Architecture. Developing these multifunctional, green infrastructure elements required the landscape architects and engineers to coordinate intensively with numerous city and regional agencies, including Above, Bottom and pg 61 top: A streetside stormwater planter is intended to provide water quality treatment of runoff. Stormwater runoff enters the streetside planter through a curb opening and chase type inlet, spreads over the planting media, infiltrates and exits through an underdrain. Inlet width is based on upstream impervious area and street slope, with a minimum width of 2' feet and a maximum width of 3'. The inlet cover specified has to meet ADA accessibility requirements and be of the Neenah R-4999 heavy-duty bolted trench grate type. Pg 61 Bottom: The Western Prairie typical planting plan for a stormwater planter is primarily native grasses and herbaceous perennials arranged in a natural way and amended based on which species thrive. Stormwater planters require a significant amount of maintenance to keep them weed free and healthy. Prairie plantings can be more forgiving and require less maintenance than the more formal "modern matrix," which uses drought tolerant, hardy natives and groups them in regular clusters. IMAGES: STREAM LANDSCAPE ARCHITECTURE 60 Landscape Architect and Specifier News

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