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on the Climax site. Three treatment visits took place over the course of the 2010 growing <br />season, beginning July 12 and concluding August 19. Herbicide spraying coincided with <br />other reclamation projects completed by Habitat Management to minimize mobilization <br />costs. Weed control efforts during 2010 were prioritized under the direction of Ken <br />Carlson of Habitat Management and Brian McGill of the Climax Mine. <br />Targeted herbicide spraying was used to control Canada thistle, musk thistle, yellow <br />toadflax, mayweed chamomile and oxeye daisy. Other noxious weed species were not <br />found in areas managed this year. Herbicide applications at Climax were focused across <br />the entire property, and were most concentrated in areas and roads around Robinson <br />Dam, Eagle Park Reservoir, Robinson Tailings Pond, Chalk Mountain Reservoir, biosolid <br />stockpiles, 10-Mile Tailings Pond, Upper and Lower McNulty Gulch, Coffer Dam Road, <br />E-Dump, Mayflower Tailings Pond, Kokomo and Searle Gulch, Storke Yard and the <br />Arkansas Reclamation Project, Arkansas Gravel Pit, and substations site-wide. A <br />summary of areas treated, chemical names and quantities applied are available in <br />Appendix A. <br />Herbicide solutions were spot sprayed to targeted weed species with ATV and UTV <br />mounted spray rigs in areas accessible from roads and tracks. Backpack sprayers were <br />employed near active construction areas and on steep hillsides. Herbicides Milestone <br />(aminopyralid), Tordon 22K (picloram) and Plateau (imazapic) were used in a tank mix <br />for July herbicide applications for purposes of addressing potential chemical resistance in <br />all target species and due to reported success with this combination in the reduction of <br />yellow toadflax infestations. Weedestroy (2,4-D Amine) and Tordon 22K (picloram) <br />were tank mixed for control of all remaining noxious weeds during the August <br />applications in order to eliminate persistent yellow toadflax infestations and to address <br />areas that were not treated in 2009. All herbicides applied at Climax for noxious weed <br />control during 2010 are broadleaf selective and have a very low potential for injury to <br />surrounding desirable native grass species. Mixing herbicides is an effective method of <br />reducing injury to surrounding vegetation because a lower rate of each active ingredient <br />is applied. Further, certain recommended herbicide combinations act synergistically on <br />Climax Mine: IPM Report 2 February 2011