While it is costly and disruptive to properties to retrofit the existing curb and gutter drainage and storm sewer system, these systems are recommended to be implemented at the time sewer repairs are necessary. This is because they generally provide a higher level of stormwater contaminant removal than the other alternatives, are relatively easy to implement and maintain, can be constructed at relatively low costs, and can be integrated within the natural environmental settings. Constructed wetlands are shallow ponded systems, with emergent aquatic vegetation such as bulrush, reeds and cattails. They act as natural water treatment systems, which use microbes and the natural chemical and physical processes in the water, soil and sediment to reduce the concentration of pollutants. Wetland environments support the largest diversity of plants and animals of any ecosystem.
Islands located within wetlands provide a refuge for mammals, amphibians and birds.
Constructed wetlands can be integrated within a natural setting, and potentially enhance opportunities for natural observation, as illustrated here. Based on comments received at the Public Open House, the recommended solutions and design concepts will be finalized. As required, the ESR will be placed on the public record for at least a 30-day public review. Individual EAs require more detailed assessment of the environmental impacts of alternatives and more extensive public consultation than Schedule C projects. Thank you for your participation in this project.