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FVMPRIME VEGETATION MANAGE <br />PO Box 1440 <br />Berthoud, CO 80513 <br />970 - 222 -4543 <br />May 20, 2013 <br />Mr. Bill McDowell <br />Cottonwood Land and Farms <br />PO Box 229 <br />Boulder, CO 80306 <br />Re: East Rigden Weed Control Program <br />Dear Mr. McDowell: <br />Per your request we have evaluated your East Rigden Property to inventory the noxious weed <br />population and recommend a management plan. As you know we have been actively managing <br />noxious weeds on the East Rigden Property since 2005. During that time we have had success <br />managing Musk thistle, Canada thistle and Leafy Spurge. There are two distinct areas that we <br />would like to address in this letter. The first area is all of the property north of the Great Western <br />Railroad line. The second area is delineated on the south by the Box Elder irrigation canal and <br />the Great Western Railroad line on the north. <br />The property north of the railroad is characterized by a quality stand of primarily cool season <br />perennial grasses with significant population of willows as you approach the lower level of the <br />mined area. As always we expect to find a few spots of thistle and Leafy Spurge, which will be <br />addressed at the appropriate time in early summer as well as in the fall. We have not come across <br />significant tamarisk pressure in 2013, but if we do we shall address it with herbicide as needed. If <br />there is standing water adjacent to the tamarisk we will use an aquatic approved product. <br />The second area (south of the railroad) has some nice stands of grass, a few noxious weeds as <br />well as some areas devoid of vegetation. Additionally, there are several groupings of tamarisk in <br />what is the bottom of the mined area. We understand that plans are underway for the City of Fort <br />Collins to develop water storage in this part of the East Rigden Pit and that development will <br />excavate the areas of tamarisk that we have noted. With this in mind, we recommend keeping the <br />tamarisk mowed until they are excavated. Any height of mowing that prevents seed production <br />and spread will be satisfactory. The other noxious weeds can be managed with appropriate <br />herbicide during the early summer and fall months. <br />Re , <br />W <br />Josh Wood <br />Owner <br />Cc: Whitey Glasser <br />