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Coors Energy Company: Keenesburg Mine Permit No. C-81-028 <br />2016 Second Quarter Pest & Disease Inspection <br />On June 28, 2016 Danny (Coors Energy Company) and Wayne (Habitat Management, Inc). <br />inspected operational, bonded reclaimed and shop areas at the Keenesburg Mine for <br />plant pests, plant diseases and noxious weeds that could or have affected establishment <br />of vegetation on reclaimed lands. The inspection was conducted by vehicular and <br />pedestrian means. The following areas were inspected: <br />• The office/shop/facility area; <br />• Topsoil stockpiles A-1 and B-1; <br />• B pit; <br />• The long-term spoil area; <br />• Bonded Reclamation; <br />• The permanent sediment pond; <br />• Mine roads; <br />• Undisturbed land within the permit boundary; <br />• and <br />• The Dugout. <br />These areas are depicted on Map 1. <br />Plant disease was not identified within the areas inspected. To date vegetation growth <br />during this growing season is progressing normally and vegetation has not been <br />adversely affected by plant pests. Areas affected by infestation or blight were not <br />identified during this inspection. No areas were observed where noxious weeds, plant <br />pests or plant disease had adversely impacted the normal growth and establishment of <br />vegetation on reclaimed lands, with the exception of cheatgrass infestations. <br />Ongoing vegetation monitoring has identified cheatgrass as a potential barrier to <br />successful revegetation of disturbed areas. The mine performed pre -emergent herbicide <br />treatments on cheatgrass in the fall of 2015 in reclamation units 29 and 30. During this <br />inspection we visually evaluated the effectiveness of these pre -emergent herbicide <br />treatments. To date, effectiveness has been variable with portions of some of these <br />reclaimed areas being absent cheatgrass seedlings and others having stands of seedlings <br />at various densities. Danny indicated that mine personnel would closely monitor areas <br />with significant cheatgrass seedling germination to determine if other treatments (i.e., <br />disking, plowing, etc.) would be required prior to inter -seeding these reclaimed areas <br />later in 2016. The reclaimed units seeded last fall currently show good germination of <br />desirable grasses with cheatgrass being significantly reduced. <br />A few scattered occurences of bindweed were observed. The mine will routinely treat <br />these locations as the growing season progresses. <br />Habitat Management, Inc. 1 July 6, 2016 <br />