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WEED CONTROL PROGRAM <br /> Barnhart Pit DRMS M-1984-008 <br /> Date:September 19,2014 <br /> The Barnhart Pit area in the vicinity of the two ponds has a significant infestation of noxious weed <br /> species. The following five species are the predominant weeds and are on the State B List: <br /> • Musk thistle <br /> • Canada thistle <br /> • Russian knapweed <br /> • Saltcedar <br /> • Russian olive tree <br /> The B List recommends"containment',which means maintaining an intensively managed buffer zone <br /> that separates infested regions,where suppression activities prevail,from largely uninfested regions, <br /> where eradication activities prevail. <br /> Transit Mix Concrete proposes a multi-year effort to contain the weed species. Chemical spraying will <br /> be the primary method of control,as it proves most successful in heavily infested sites such as this. <br /> Spraying also avoids root sprouting from broken root segments remaining in the ground and minimizes <br /> soil disturbance which often encourages more weeds. <br /> The spraying program will begin in the north weed areas adjacent to Townsend Drive. Then spraying <br /> will proceed along the western weed border. When those areas are given a first chemical application, <br /> spraying will proceed eastward toward the Arkansas River. In this way,we can contain the weeds and <br /> prevent more spreading toward surrounding property to the north and west. <br /> Based on the location and size,the saitcedar and Russian olive trees will be treated by one of the <br /> following: <br /> • The cut stump method,where the trees are cut down and the remaining stump is treated <br /> immediately with an herbicide. The tree slash will either be chipped on site and removed or <br /> stored on site and later burned. <br /> • The removal of the entire tree including the stump by an excavator with a thumb on the bucket. <br /> The tree slash will either be chipped on site and removed or stored on site and later burned. <br /> Tree sprouts from the broken roots emerging the next year will be treated with an herbicide. <br /> The thistle and other tall weed areas will be mowed this fall or winter to allow access to the areas for <br /> inspection and later spraying. <br /> Because of the late time of year,we believe that spraying in 2014 will have a minimal positive affect. <br /> Therefore we will start our multi-year program in the spring of 2015. <br /> 1 <br />