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<br />415 - Exotic thistle <br />416 - Siberian elm <br />417 - Ph rag mites <br />418 - Grecian foxglove <br />419 - Amur maple <br />420 - Black locust <br />421 - Absinthe sage <br />422 - Dames rocket <br />499 - Other <br /> <br />Field-check Level <br />A field-check level modifier was assigned to appropriate areas. The field-check level <br />indicates the degree to which an individual polygon was checked in the field during the <br />land cover assessment. Where access permitted, most of the natural area polygons <br />within this project were visited wholly/partially or viewed from edge. The following is a <br />list of field check modifier values and their associated description: <br /> <br />. 0 = site not visited <br />. 1 = viewed the site from a distance <br />Was not able to walk to the site, but was able to discern the dominant vegetation. <br />Masses of invasive species may be visible, and thus were recorded (buckthorn, reed <br />canary grass, crown vetch, etc). Depending on the perceived quantity of invasive <br />species, a natural quality ranking of D mayor may not be discernable. <br />. 2 = visited the edge of the site <br />Walked or drove to the edge of the site, and was able to inventory some invasive <br />species and speculate on its natural quality. Depending on the perceived quantity of <br />invasive species, a natural quality ranking of C or D mayor may not be discernable. <br />. 3 = visited part of the site <br />walked into the site and was able to confidently inventory most invasive species <br />present and assess its natural quality - A, B, C or D. Wetlands that are inventoried <br />from the edges in several places should be given this field check level. <br />. 4 = visited the entire site <br />Was able to inventory all invasive species present and assess the site's natural quality <br />- A, B, C or D. <br /> <br />Other Modifier Codes that were applied, where possible' <br />. 247 - Trails <br />. 6XX series - Forestry modifiers <br />. 72X series - Water modifiers, Built features <br />. 73X series - Water modifiers, Wetland features <br />. 74X series - Water modifiers, Stream features <br /> <br />City of Elk River, MN - Natural Resouce Inventory <br />Bonestroo Natural Resources, September 2004 <br /> <br />13 <br />