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5 <br />• Break up impervious surfaces to allow opport unities 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 aqu atic resources. <br /> <br />16.4 Provide construction oversight to ensure designed sediment and erosion control <br />measures are being implemented. <br /> <br />16.5 Implement the Conservation Design Framework (CDF, Figure 10 -3). <br /> <br />which is designed to help mitigate erosion and sedim entation 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 /> <br /> <br />I TEM 17 W ATER Q UALITY : S URFACE W ATER R UNO FF <br /> <br />Mitigation Strategies <br /> <br />The City will: <br /> <br />17.1 Work 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 />17.2 Work with project proposers to disperse collection, conveyance, and management <br />of stormwater runoff as much as possible throughout the AUAR site thr ough the <br />use of bio -swales, rain gardens, and infiltration areas. <br />17.3 Require stormwater management systems to be developed in accordance with <br />Rice Creek Watershed District Rules . <br />17.4 Require project proposers to design stormwater management areas (SMAs) to <br />suppor t native vegetation and maintain runoff rates at or below pre -development <br />conditions. <br />17.5 Require 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% o f existing conditions runoff volumes. <br />17.6 Encourage 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 />17.7 Require project proposers to provide detail ed topographic information with a <br />contour interval of 1 -foot and drain tile mapping.