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b. Potential negative impact: <br />1. Species that out-compete native plant populations, excluding natives from the <br />area. <br />2. Species that overtake and exclude natives following disturbances such as <br />mechanical disturbances, or that hinder restoration of natural communities. <br />c. Difficulty of control: <br />1. Species likely to be controlled with available technology but will not be replaced <br />by desirable natives without an active restoration program requiring resources. <br />2. Species likely to be controlled or eliminated with available technology and <br />resources and which desirable native species will replace with little further input. <br />3. Species difficult to control with available technology and resources and/or whose <br />control will likely result in substantial damage to other, desirable species. <br />d. Value of habitats (rangeland and riparian): <br />1. Infestations that occur in the most highly valued habitats or areas of the site - <br />especially areas that contain rare or highly valued species or communities and <br />areas that provide vital resources. <br />2. Infestations that occur in less highly valued portions of the site. <br />3. Areas already badly infested with other weeds may be given low priority unless <br />the species in question will make the situation significantly worse. <br />C. Summary of Specific Actions Planned <br />An initial inventory of weed infestations will occur in the spring/summer of 2008 in <br />order to develop baseline data. Thereafter, monitoring should occur on an annual basis <br />for the life of the project. Either GPS-based or hand-drawn maps will be utilized in <br />order to track changes. <br />Noxious weed species that will be targeted include: tamarisk (salt cedar), Canada <br />thistle, Russian knapweed, field bindweed, kochia, leafy spurge, hoary cress, diffuse <br />knapweed, spotted knapweed, and musk thistle. This list may change as conditions, <br />regulations or plant populations change. Mechanical, cultural, chemical and biological <br />control will be the primary methods of control utilized. All herbicides utilized will be <br />registered with the EPA, and applied in a manner as prescribed by the EPA-approved <br />label, and by (or under the supervision of) a company or person licensed in the State of <br />Colorado as a Commercial Pesticide Applicator or a Qualified Supervisor. <br />All construction equipment that is brought onto the project site will be cleaned (utilizing <br />high-pressure water spray) prior to being transported to the site. <br />6 <br />All Rite Paving & Redi-Mix, Inc. Site Weed Management Plan tune 20, 2008