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<br />18 <br />erosion during high water events. By year three, ground coverage should meet or exceed 80% <br />with new plantings and volunteer woody vegetation growth. If more than 20% open ground is <br />observed, an interventional stake planting may be needed. <br /> <br />Herbaceous native vegetation will be planted to provide initial stabilization while the woody <br />vegetation establishes. Long-term maintenance or monitoring of herbaceous vegetation is not <br />required for bank stabilization. Invasive species will be maintained as described in Section <br />7.3.4. <br /> <br />7.3.2 Floodplain Forest <br />Floodplain forest sites must provide increasingly higher quality riparian buffer and corridor <br />habitat as natural succession of these sites occurs over time. To achieve this, sites must have <br />high enough survivorship of planted seedlings following year one to meet the minimum number <br />of stems required for full stocking (Appendix F). If survivorship of seedlings is not great enough <br />to meet this standard, then a combination of natural regeneration and planted seedlings shall be <br />used to meet the minimum number of stems required. If minimum stocking requirements cannot <br />be met through a combination of planted and naturally regenerated seedlings, then <br />supplemental planting shall occur to meet the stocking requirements. <br /> <br />Herbaceous native vegetation will be planted to prevent invasive or noxious weeds from <br />establishing between tree plantings. Long-term maintenance and monitoring of herbaceous <br />vegetation is not required for the floodplain forest. Invasive species will be maintained as <br />described in Section 7.3.4. <br /> <br />7.3.3 Oak Savannah <br />Oak Savannah sites must meet the target of bur oak survivability that will provide 10-50% total <br />canopy cover at maturity. To meet this target, stocking standards shall be met in the interim to <br />increase the likelihood that there will be adequate canopy cover in the future (Appendix F). If <br />stocking goes below the desired trees per acre then supplemental planting with bare root stock <br />shall be considered in order to meet the desired canopy cover at maturity. <br /> <br />Grassland areas within the Oak Savannah will be measured with interim and final vegetation <br />standards as shown in Table 4 below. Interim vegetation standards are intended to keep <br />vegetation establishment on track to meet the final vegetation standards. The interim vegetation <br />standards shall be met no later than year 3 for Interim Standard 1 and year 4 for Interim <br />Standard 2. Invasive species will be maintained as described in Section 7.3.4. <br /> <br />Table 4. Oak Savannah grassland vegetation performance standards. <br />VEGETATION PERFORMANCE STANDARDS <br />Performance Standard Interim 1 Interim 2 Final <br />Relative Areal Cover ≥50% NNI; <50% InNN1 ≥70% NNI; <30% InNN2 ≥80% NNI; <20% InNN