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RULE 2 - PERMITS <br />years is reviewed and evaluated. Based on this information, treatment strategies and schedules are <br />• developed during the early spring for the annual weed management program using the following steps: <br />• For mapped weed infestations, treatment method is determined based on the weed species <br />present using recommendations provided by the CSU Extension Service. Selection of <br />treatment method(s) takes into consideration proximity to flowing water or water bodies, <br />croplands, any livestock use, and historical response of identified weed species to prior <br />treatment(s), based on review of control effectiveness. Treatment methods may include <br />mechanical controls (tillage, mowing, burning, cutting/pulling), chemical controls (selective <br />herbicides), biological controls (weed- specific insects or pathogens), or combinations of these <br />methods. In general, treatment method(s) will be selected to achieve the most effective control <br />with the resources available. As an example, where multiple weed species are present, the most <br />effective overall control(s) will be applied, although the method(s) may not be optimal for each <br />individual species. <br />Scheduling of weed management treatments will also be based on the CSU Extension Service <br />recommendations for specific weed species. For most species, control effectiveness can be <br />significant enhanced by scheduling treatment at specific stages of vegetative growth (typically <br />spring and/or fall). To the extent possible, based on staff and contractor availability, treatment <br />will be scheduled to optimize effectiveness. <br />• Priority and responsibilities for weed control are determined based on weed species present and <br />the location and extent of weed infestations. Certain weed species are extremely aggressive, <br />• and first priority will be given to their control to prevent establishment and spread. Previously <br />treated areas are second in priority, in order to maximize control effectiveness. Third in <br />priority are any new weed infestations and areas where the weed infestation covers a large area, <br />to prevent further spread. Lowest priority is given to isolated weed infestations of non- <br />aggressive species which have not been previously treated, since these may be addressed by <br />natural vegetative succession and pose a reduced risk of spread. Generally, grazing lessees are <br />responsible for weed control on their lease areas, with PSCM sharing control costs and <br />providing oversight, under the terms of the lease agreements. PSCM is responsible for weed <br />control on remaining areas and in particular those lands of the Seneca II mine which are now <br />part of the PSCM and which have not received final bond release (see Exhibit 2.04.13 -E3). <br />All weed management activities (both PSCM and grazing lessee) follow the general priorities, <br />as outlined above. <br />Application of Selected Control Method(s) - The following summarizes the proposed treatment <br />methods for listed noxious weed species known to occur within the PSCM permit area. If treatment <br />extends over a longer time period, or if control effectiveness is determined to be lower than anticipated, <br />treatment methods or chemicals may be adjusted to improve long -term effectiveness. Approved or <br />more effective chemicals for targeted weeds may change over time and these modifications will be <br />incorporated as needed. <br />Routt County Noxious Weed list: <br />• • Yellow toadflax/butter and eggs - Spring spot spraying with Tordon (Banvel is alternative <br />chemical) <br />PSCM Permit App. 2.05 -56 Revision 12/17/09 <br />