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6 171 Wetland Buffer Widths Average Buffer Width 25 feet Minimum Buffer Width 12.5 feet 172 (2) New and existing ponds constructed for water quantity and quality adjacent to new 173 development shall maintain a 10-foot vegetative buffer from the normal water level. 174 (3) Stormwater management BMPs shall not be allowed to be constructed in the buffer area, 175 unless approved by the City Engineer. [RJ11][JF12] 176 (4) A permanent wetland buffer monument shall be installed at each lot line where it crosses 177 a wetland buffer, and where needed to indicate the contour of the buffer, with a 178 maximum spacing of two hundred (200) feet of wetland edge. 179 (5) Where acceptable vegetation exists in buffer areas, the retention of such vegetation in an 180 undisturbed state is required unless an applicant receives approval by the City District to 181 replace such vegetation. A buffer strip has acceptable vegetation if it: 182 a. Has a continuous, dense layer of vegetation or overstory of trees and/or shrubs 183 that have been uncultivated or unbroken for at least five consecutive years, or 184 b. Is not composed of undesirable plant species (including, but not limited to: reed 185 canary grass, common buckthorn, purple loosestrife, leafy spurge, and noxious 186 weeds), or 187 c. Does not have topography that tends to channelize the flow of surface runoff. 188 (6) If the City determines the existing buffer to be unacceptable, the applicant shall maintain 189 the minimum buffer in its undisturbed state but may disturb the remainder of the buffer 190 area as long as the buffer area is re-planted with native species and maintained as a native 191 habitat. The buffer planting must be identified on the permit application and the buffer 192 landscaping shall comply with the following standards: 193 194 a. Buffer areas shall be planted with a native seed mix, native plants, shrubs, trees, 195 or other[RJ13] vegetation approved by the City., with the exception of a one-time 196 planting with an annual nurse or cover crop such as oats or rye. 197 b. The revegetation project shall be performed by a qualified contractor. All methods 198 shall be approved by the City prior to planting or seeding. 199 c. The seed mix shall be broadcast according to the specifications of the selected 200 mix including date of application. The annual nurse or cover crop shall be applied 201 at a minimum rate of 30 pounds per acre. The seed mix selected for permanent 202 cover shall be appropriate for soil site conditions and yellow tag certified free of 203 invasive species. [RJ14][JF15] 204 d. Native shrubs may be allowed to be substituted for native forbs. All substitutions 205 shall be approved by the City. Such shrubs may be bare root seedlings and shall 206 be planted at eight foot spacing. Shrubs shall be distributed so as to provide a 207 natural appearance and shall not be planted in rows. [RJ16][JF17] 208 e. Any groundcover or shrub plantings installed within the buffer area are 209 independent of any landscaping requirements required elsewhere by the City. 210 f. Compacted soils in the buffer area shall be loosened to a depth of at least 5” prior 211 to seeding. 212 RCA Attachment B