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_oxeye daisy (Chrysanthemum leucanthemum) <br />–X—Canada thistle (Cirsium arvense) <br />X_ bull thistle (Cirsium vulgare) <br />Scotch thistle (Onopordum acanthium) <br />_X musk thistle (Carduus nutans) <br />_X cheatgrass (Bromus tectorum) <br />X Mountain tarweed (Madia glomerata) <br />Management Recommendations <br />Gravel pits are unique sites with special weed management considerations. They are <br />continually disturbed and material is regularly hauled off-site. This necessitates different <br />weed management goals than on other types of property. It is essential that weeds, <br />including weed seeds, are not spread from this quarry to other areas, and that is the <br />primary goal of good weed control at this site. This requires an aggressive weed control <br />Program. <br />There are four main stages to weed control at this quarry: detection, prevention, <br />treatment, and monitoring. <br />Detection of noxious weed species begins with a survey of the site prior to disturbance. <br />Further detection of new weed species is essential, and the property owner shall <br />continually monitor the property for them. Of particular concern are those weeds on the <br />County and the State noxious weed lists. Weed which are checked in the preceding list <br />are especially likely to occur in this area of the Routt County. <br />Prevention is a key component of this plan. Those areas that are being reclaimed shall be <br />re -seeded as soon as possible (and in accordance with any other permits) with a weed - <br />free mix composed primarily of grasses. (Appendix A provides potentially appropriate <br />seed mixes, and the local County Extension Agent can help develop any mixes in the <br />future.) If any hay is used in the reclamation process State Certified Weed Free Hay <br />shall be used. Seeding is best accomplished in the fall or with a hydro-mulcher. Any <br />topsoil sold as a part of the permit shall be weed free to prevent weeds from spreading <br />throughout Routt County. <br />Treatment of noxious weeds varies by the severity of the infestation, the biology of the <br />plant, location, time, and money. Biological, chemical, mechanical, and cultural controls <br />are all important, and to maximize control it is best if more than one method is employed <br />on each weed infestation. Specific treatments are outlined below. <br />2 <br />