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(3) Buffer areas which have been broken or cultivated within the past ten consecutive years must be restored to a <br /> condition consistent with an acceptable buffer area defined in section 78-1605(b)(1), a restoration or landscape <br /> plan must be submitted to the planning director, which restoration shall include, replanting and maintaining <br /> according to each of the following guidelines: <br /> a. Buffer areas shall be planted with a seed mix containing 100 percent perennial native plant species, except for <br /> a one-time planting of an annual nurse or cover crop such as oats or rye. <br /> b. The seed mix to be used shall consist of at least 12 pounds pure live seed (PLS) per acre of native prairie <br /> grass seed and five pounds PLS per acre of native forbs. Native prairie grass and native forb mixes shall <br /> contain no fewer than four and five species respectively. <br /> c. The annual nurse or cover crop shall be applied at a rate of 20 pounds per acre. <br /> d. Native shrubs and or trees may be used in addition to forbs and grasses. Shrubs shall be distributed so as to <br /> provide a natural appearance and shall not be planted in rows. <br /> e. Native prairie grasses and forbs shall be planted by a qualified contractor. <br /> f. No fertilizer shall be used in establishing new buffer zones, except on highly disturbed sites when deemed <br /> necessary to establish acceptable buffer vegetation and then limited to amounts indicated by an accredited <br /> soil testing laboratory. <br /> g. All seeded areas shall be mulched immediately with clean straw at a rate of one and one-half tons per acre. <br /> Mulch shall be anchored with a disk or tackifier. <br /> h. Buffer areas (both natural and created), shall be protected by silt fence during construction and the fence shall <br /> remain in place until the area crop is established, and at that time the fence shall be removed. <br /> (c) Buffer area widths will be based on the wetland protection strategies established in the Orono Surface Water <br /> Management Plan (SWMP) (December 2002). A protection classification has been assigned to each wetland in Orono <br /> based on the stormwater susceptibility and functional assessment for each wetland. The four protection classifications <br /> are described as follows: <br /> Protection Susceptibility Description <br /> Classification Rating <br /> "Preserve" 1 Highly Highly susceptible to both quantity and quality impacts from runoff; have the highest degree of protection <br /> Susceptible <br /> "Manage 1" Moderately Moderately susceptible to quantity and impacts;-protection is le--s—s. stringent than <br /> Preserve, <br /> Susceptible provides protection to maintain their characteristics <br /> I"Manage 2" Slightly Less stringent protection than Manage 1 wetlands;maintenance of characteristics is desirable <br /> Susceptible <br /> "Manage 3" Least Wetlands are significantly degraded (e.g.,cultivated or canary grass monotype)or lack of wetland <br /> Susceptible characteristics; not typically impacted by runoff; no quantity and only limited quality treatment of runoff is <br /> required <br /> The protection classification for each wetland will be found on the "Wetland Management Classification Map & List" <br /> which is hereby adopted by reference, a copy of which shall be kept on file in the office of the city clerk and shall be <br /> available for public review during all normal office hours. The following are the required buffer area widths for each <br /> protection classification: <br /> Protection Width of Additional Protection Requirements <br /> Buffer Area I(B= Bounce=Change in water level due to runoff event) <br />