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Chevron Mining, Inc. Edna Mine: 2011 Weed Management Report <br />of Moffat Pond and the road that leads to it. An herbicide solution of Tordon 22k at 0.26% <br />dilution and Weedestroy at 1.04% dilution was applied to these infestations. <br />Treatment 2- July 6 through July 9, 2011 <br />The second treatment visit in 2011 focused solely on the areas identified as remaining concerns <br />by DRMS at the June 21 bond release inspection as discussed in the "2011 Weed Management <br />Prioritization" section. <br />Numerous large infestations of perennial pepperweed were treated in the area immediately <br />surrounding Moffat Pond. The largest population treated occupied the majority of the drainage <br />channel leading into Moffat Pond from the south and the southernmost hillside surrounding the <br />pond. Several small infestations were treated in the vicinity of the southernmost drainage <br />channel immediately east and upslope of the pond, near the rock drain. Perennial pepperweed <br />infestations were treated with backpack sprayers and care was taken to spray upslope in the <br />vicinity of the pond. Perennial perpperweed in the Moffat area was treated with an herbicide <br />solution of Weedestroy at 1.04% by volume of water and Tordon 22k at 0.26% by volume of <br />water. <br />Moderate to heavy houndstongue populations as identified by DRMS were treated on slopes and <br />in drainages throughout the northwest quadrant of the Moffat area. This species was found to be <br />light in areas immediately surrounding Moffat Pond, but was found in considerably more severe <br />infestations throughout the drainages immediately east and upslope of the pond, particularly on <br />the northern slope of the drainage leading to the rock drain. Houndstongue was treated using <br />backpack sprayers on pond slopes and the UTV mounted spray rig in drainage areas east of the <br />pond and on the West Ridge. Houndstongue in the Moffat area was treated with an herbicide <br />solution of Weedestroy at 1.04% by volume of water and Tordon 22k at 0.26% by volume of <br />water. <br />Canada thistle generally emerges later than other noxious weeds identified at the Edna Mine. In <br />2011, Canada thistle emergence has been estimated at approximately three to four weeks later <br />than average in Routt County. As both treatment visits occurred relatively early in the growing <br />season, only light to moderate Canada thistle populations were identified in the permit areas. <br />Virtually all significant infestations occurred within the Moffat area. Infestations on the eastern <br />slope of Moffat Pond and in upslope areas east of the pond identified by HMI at the initial <br />evaluation and by DRMS at the June 21 inspection were treated during HMI's July visit. <br />Backpack sprayers were utilized on light infestations occupying pond slopes and the UTV <br />mounted spray rig was utilized to treat heavier infestations in drainage areas east of the pond. <br />Canada thistle in the Moffat area was treated with an herbicide solution of Weedestroy at 1.04% <br />by volume of water and Tordon 22k at 0.26% by volume of water. <br />Moderate to heavy whitetop populations in the Edna Mine's West Ridge area were also <br />addressed during the second 2011 treatment visit. Large whitetop populations were identified <br />by DRMS at the June 21 inspection in the vicinity of terrace T8 and were set as priority <br />treatment areas for the July herbicide applications. Several smaller whitetop patches were <br />designated for treatment along terraces east of the West Ridge road as well. Additional light to <br />moderate whitetop infestations were identified by HMI along the step pond corridor adjacent to <br />the eastern boundary West Ridge. Houndstongue was found to be moderately interspersed with <br />whitetop infestations on terraces west of the main road on the West Ridge. <br />Habitat Management, Inc. 4 August 19, 2011 <br />