12/18/2013 Env Bd Packet - Laserfiche WebLink

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(a) Maximize water quality and flood control on individual project sites through Better Site Design practices and stormwater management. (b) Minimize land use impacts and improve operational and maintenance efficiency by using stormwater BMPs, when needed, regionally unless local resources would be adversely affected. (c) Treat stormwater runoff before discharge to surface water - bodies and wetlands, while considering the historic use of District water features. (d) Ensure that future peak rates of runoff are less than or equal to existing rates. (e) Reduce the existing conditions peak rate of discharge along Lower Rice Creek and the rate of discharge and volume of runoff reaching Long Lake, to preserve the remaining floodplain storage volume within Long Lake and mitigate the historic loss of floodplain storage. (f) Preserve remaining floodplain storage volume within the Rice Creek Watershed to minimize flood potential throughout the District. The development is required to meet both water quality and volume regulations consistent with RCWD and City AUAR requirements. There must also be no net loss of floodplain for the site. A watershed district permit is required for development on this site. Use of the PUD process allows for Better Site Design practices throughout the site. Key provisions include the local roads within the development will have 50 and 60 foot right of way widths and 28 and 32 foot wide paved road surface. By lowering the amount of pavement surface area, the amount of impervious area and surface water runoff is decreased. In AUAR areas along the I35W corridor, Conservation Development design and/or low impact development design principles will be required of new developments, with an emphasis on ecological stormwater management and natural resource conservation. The stormwater and conservation components of individual developments must integrate with the CDF "Conservation Development Framework ". A management plan will be required to ensure long -term perpetuation of the public values conserved or restored in the natural open space and in the ecological stormwater management system of the CDF. Ecological education, provided by the developer, may be required for a specific development project (e.g., educational pamphlets, signage, Home Owner Association workshops, etc.). Recommend that the developer consider water reuse to irrigate park and berm areas. This would help to achieve RCWD volume control requirements and surface water treatment train requirements of the AUAR and help satisfy AUAR requirements. 4 • •