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2 discretion of the City to seek cumulative remedies. (Ord. 1416, 9-26-2011) 1 (Ord. 1550, 6-4-2018) 2 3 803.05 : Stormwater Management Overlay District 4 A. Establishment. The Stormwater Management Overlay District shall 5 include all land either within one hundred (100) feet of the normal water 6 level of constructed stormwater ponds or wetlands managed for 7 stormwater quantity and quality management purposes, or all land below 8 the 100-year flood elevation of such ponds or wetlands, whichever is 9 most restrictive. 10 B. Definition: “Stormwater pond” – A manmade pond capable of holding 11 water seasonally or permanently, the purpose of which is to collect 12 runoff, nutrients, and sediment prior to releasing water into wetlands and 13 natural water bodies. 14 C. Lot Standards. All lots within the Stormwater Management Overlay 15 District shall met the following setbacks: 16 17 STRUCTURE SETBACKS FROM STORM POND Type of Water Body Structure Setback from Water Body Roads, Driveway, Parking and Other Impervious Surface or Setback Storm Pond 10 Ft. 1 10 Ft. 2 1. Setback is measured from the pond boundary[JF4],[RJ5] as defined by the 1% probability storm, or as approved by the City Engineer. 2. A 10 foot setback from road or parking surfaces may include a combination of land within rights of way and adjacent to the right of way, as well as curb and gutter controlling runoff and sediment to a storm pond. Pedestrian trails shall be exempt from setback requirements. 18 D. General Standards: 19 1. Existing Natural Drainageways: When possible, existing natural 20 drainageways, and vegetated soil surfaces shall be used to convey, store, 21 filter, and retain stormwater runoff before discharge to public waters. 22 2. Minimum Disturbance: Development shall be planned and conducted in 23 a manner that will minimize the extent of disturbed areas, runoff 24 velocities, erosion potential, and reduce and delay runoff volumes. 25 Disturbed areas shall be stabilized and protected as soon as possible and 26 facilities or methods used to retain sediment on the site. 27 3. Constructed Facilities: When development density, topographic features, 28 and soil and vegetation conditions are not sufficient to adequately handle 29 stormwater runoff using natural features and vegetation, various types of 30 constructed facilities such as diversions, settling basins, skimming 31 devices, dikes, waterways, and ponds may be used. Preference shall be 32 given to designs using surface drainage, vegetation, and infiltration 33 rather than buried pipes and manmade materials and facilities. 34 E. Specific Standards: 35 1. Impervious Surface Coverage: Impervious surface coverage of a site 36 shall not exceed 25% of the site area in a shoreland or wetland 37 overlay[JF6] district unless stormwater is conveyed to an approved, on-38 RCA Attachment B