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Break up impervious surfaces to allow opportunities for infiltration; <br />Use ecological stormwater management techniques, such as vegetated swales, <br />infiltration systems, and biofilter wetlands; <br />Provide energy dissipation and outfall stabilization; and <br />Establish and maintain vegetated buffers around aquatic resources. <br />16.4 Provide construction oversight to ensure designed sediment and erosion control <br />measures are being implemented. <br />16.5 Implement the Conservation Design Framework (CDF, Figure 10-3). <br />which is designed to help mitigate erosion and sedimentation caused by surface <br />water runoff. Components of the CDF that help mitigate erosion and <br />sedimentation include conservation of natural open spaces, buffering, and an <br />ecological stormwater management system. <br />I17WQ:SWR <br />TEM ATER UALITYURFACE ATER UNOFF <br />Mitigation Strategies <br />The City will: <br />17.1Work with project proposers to establish a regional stormwater management <br />system within the Conservation Design Framework (CDF, see Figure 10-3) that <br />consists of vegetated swales, wet prairies, and wetlands oriented in series to <br />effectively retard runoff rates, reduce stormwater volume, and enhance water <br />quality. <br />17.2Work with project proposers to disperse collection, conveyance, and management <br />of stormwater runoff as much as possible throughout the AUAR site through the <br />use of bio-swales, rain gardens, and infiltration areas. <br />17.3Require stormwater management systems to be developed in accordance with <br />Rice Creek Watershed District Rules. <br />17.4Require project proposers to design stormwater management areas (SMAs) to <br />support native vegetation and maintain runoff rates at or below pre-development <br />conditions. <br />17.5Require project proposers to design stormwater management systems that can <br />achieve proposed conditions runoff volumes that are no less than 80% and no <br />greater than 150% of existing conditions runoff volumes. <br />17.6Encourage project proposers to use techniques that produce no net increases in <br />total phosphorus content of proposed conditions runoff relative to existing <br />conditions runoff. <br />17.7Require project proposers to provide detailed topographic information with a <br />contour interval of 1-foot and drain tile mapping. <br />5 <br /> <br />