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17 <br />habitat, areas designated by the county biological survey, greenways, parks and open <br />space, groundwater recharge areas, wellhead or surface water protection areas or <br />regional stormwater pond locations. <br />(c) Conveyance system. Wherever possible untreated and treated stormwater <br />runoff shall be conveyed in facilities open to the atmosphere (e.g. swales, vegetated <br />buffer strips, energy-dissipating structures, and the like) rather than through enclosed <br />pipes, so as to decrease runoff velocity, allow for natural infiltration, allow suspended <br />sediment particles to settle, and to remove pollutants. <br />(d) Proposed development design shall: <br />1. Maintain or decrease runoff volume, where practicable as determined by <br />the City Engineer; <br />2. Decrease erosion and sedimentation; <br />3. Maintain or decrease flow frequency, duration, and peak runoff rates; <br />4. Increase infiltration (groundwater recharge) or filtration; <br />5. Maintain existing flow patterns; <br />6. Reduce time to peak flows by increasing the time of concentration to and <br />through storm sewers; <br />7. Provide storage of stormwater runoff on site; <br />8. Avoid channel erosion; <br />9. The proposed project must not adversely affect water level off the site <br />during or after construction; and <br />10. The proposed activity may not reduce hydraulic efficiency of the drainage <br />ways at any point up-gradient of the applicant's parcel boundary. <br />10.11. A combination of Stormwater BMPs may be used to meet the <br />requirements of section(s) 6, 7, or 8 <br />(e) Landlocked basins. A landlocked basin may be provided an outlet only if it: <br />1. Retains a hydrologic regime that complies with the requirements of the <br />local governmental unit (LGU) responsible for administration of the Wetland <br />Conservation Act (WCA); <br />2. Provides sufficient dead storage volume to retain back to back 100-year, <br />24-hour rainfalls and runoff; and <br />3. Does not create adverse downstream flooding or water quality conditions <br />as a result of increased discharge rate or volume, or other factors. <br />(f) All plans shall be consistent with National Pollutant Discharge Elimination <br />permit (NPDES) requirements, the Lino Lakes engineering design standards, the Lino <br />Lakes stormwater design standards, and the filing or approval requirements of Rice <br />Creek Watershed District, Vadnais Lakes Watershed Management Organization, Anoka <br />County, Minnesota Department of Natural Resources, Minnesota Department of