Laserfiche WebLink
Vegetation Management Plan <br />In conjunction with the annual monitoring, vegetation will be <br />monitored for establishment and the presence of noxious or exotic <br />species. The primary concern for this wetland is the establishment of <br />common buckthorn. If buckthorn becomes problematic within the <br />wetland or upland buffer it will be manually removed, or spot treated <br />with glyphosphate if it is found in an isolated area. The treatment and <br />removal of buckthorn on the property and the replacement of soils <br />contaminated with buckthorn seeds will reduce the likelihood of <br />buckthorn becoming established in the mitigation site. Successful <br />revegetation of the site will also reduce buckthorn’s competitive <br />advantage over native species in disturbed areas. <br />Reed canary grass is also known to be in the area and will more than <br />likely appear within the mitigation site. If reed canary grass becomes <br />established and begins to dominate, appropriate control methods will <br />be used to reduce its presence. The successful creation of the <br />floodplain forest should reduce the likelihood of significant reed <br />canary grass establishment. Other exotic species will be controlled <br />appropriately if they are identified on the site. <br />Trees, shrubs, and seeded areas that do not become established will be <br />promptly replaced. Recommendations of vegetation maintenance and <br />actions will be summarized in the annual monitoring report. <br />Seeded areas will be mowed tw ice during the first year if weed species <br />are present. The site may also be mowed in subsequent years. <br />Because the site is proposed to develop into a scrub-shrub / floodplain <br />forest, burning is not recommended as a management tool. <br />Storm Water Treatment (Rule N) <br />A summary of the information required by MCWD Rule N is provided <br />in Appendix G. A storm water ueatment pond is proposed on the <br />eastern half of the properly north of the drainage ditch. The pond w ill <br />be outside of the required buffer area along the stream. The pond is <br />designed as a treatment pond and will have standing water and wetland <br />vegetation. The hydraulics of the pond have been calculated and are <br />available in Appendix H. The design efficiencies for total suspended <br />solids and phosphorus removal have also been calculated. The pond <br />design will meet NURP Standards with a modeled removal rate of <br />93.3^c for suspended solids and 65.19c for phosphorus. The efficiency <br />calculations are available in Appendix 1. <br />Minnehaha Creek Watershed Distnet Permit Application <br />City ol Orono, Minnesota <br />ALONGL0204.00 <br />Page 14 <br />Midi