Ordinance No. 20224 - Laserfiche WebLink

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vegetation removal and planting and replanting standards set forth below and the following: 1. Reduced buffer areas shall be planted only with native trees, shrub and grass or other non -woody species appropriate to increase to the greatest extent practicable the capacity of the area to filter pollutants from stormwater that flows across the buffer area. where existing native vegetation already serves this function, new plantings shall augment those already existing, unless the applicant can clearly demonstrate to the planning director or decision -maker that additional plantings will not improve the filtering capacity of the buffer area. 2. Plantings shall consist of species native to the southern Willamette Valley from a native plant list approved by the city manager that are appropriate to the site given its topography, hydrology, soil, existing native vegetation and historic native vegetation. 3. Plantings shall not adversely affect adjacent protected wetlands through invasion or other effects. (b) All refuse, toxic materials and any fill that detracts from the function of the buffer shall be removed. (c) where practicable, finished grades shall encourage sheet flow of stormwater runoff across buffer areas to maximize filtering and infiltration of stormwater runoff within buffer areas. (d) On sites where the slope within the wetland buffer area exceeds 15 percent, measures (e.g., planting and contouring) shall be taken to slow the flow of stormwater runoff to the maximum extent practicable. (e) Non - native plants shall be removed to the maximum extent practicable and replaced with native species. (f) Buffer enhancement work shall be completed prior to or concurrent with other site development, unless appropriate native species are not available within that time frame. (2) Vegetation Removal: (a) Vegetation removal is limited to removal of: 1. Non - native and invasive plant species included on a list approved by the planning director and kept on file at the city; 2. Dead or dying trees or shrubs that are an 1 u i n ent danger to public health and safety as determined by the planning director or decision- - maker. Removal shall only be authorized after all other reasonable alternatives have been examined and proven impractical, and the removal is the minimum necessary to meet the objectives of the proposed use; 3. Dead or dried native plants or grasses only when they constitute an imminent fire hazard, as determined by the fire marshal; 4. Native vegetation to facilitate or encourage the growth of other Ordinance - 83