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Executive Summary <br /> The City of Elk River has expressed interest in installing a green roof on a building at their <br /> wastewater treatment plant, primarily as a demonstration project and with secondary benefits in <br /> reducing stormwater runoff and reducing the urban heat island effect. We approached this by <br /> researching green roofs and the associated costs, maintenance needs and materials required to <br /> construct a green roof. There are a myriad of options when it comes to building a green roof, <br /> from hiring a contractor to custom-ordering materials to building it without professional help. <br /> Each option has its own advantages and drawbacks, discussed in detail in this report. But <br /> installation is not the only step to a successful green roof. After installation, the plants need to <br /> be properly watered and cared for. It is also important for the plants on the roof to be relatively <br /> low maintenance and not have large water requirements, since the employees at the treatment <br /> plant have other duties than looking after the green roof. In this report we have made <br /> recommendations based on what we know about Elk River's needs based on our research on <br /> green roofs. <br /> 2 <br />