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RECEIVE® <br /> Black Obsidian Pit—Permit M-1987-026 JUL 1 <br /> 112c Conversion Application y�022 <br /> DIVISION OF RAF <br /> EC <br /> Rule 6.4.4 MININGAND TIdN <br /> Exhibit D <br /> Noxious Weed Control Plan <br /> Colorado Quarries has an existing noxious weed control plan,which includes annual inspections and <br /> timely and appropriate treatments. For many years the operator has participated with the Fremont <br /> County Weed Management for these inspections and herbicide treatments. In addition,all BLM- <br /> managed land receives regular weed inspections by BLM staff. <br /> Noxious weed species that have been observed on the site include: Russian knapweed, diffuse <br /> knapweed,and Canada thistle. <br /> All areas of the permit are inspected, and areas of known weed presence are more closely monitored. <br /> Areas of weed presence area mainly disturbed areas(such as equipment storage or materials piles)and <br /> along roadways. Specific areas where patches of noxious weeds have been observed and are actively <br /> monitored include the disturbed areas around the edges of the pit,and have been observed to contain <br /> mostly Russian knapweed. <br /> Fremont County Weed Management staff are trained and licensed applicators. Applications are mainly <br /> targeted spot sprays, carried out by ATV with GPS tracker. Participating in their program ensures that <br /> herbicides are applied at an effective time and that the herbicides are appropriate to use on the target <br /> species. Different, more effective herbicides may be developed in future years, and Fremont County <br /> will revise the treatments under this plan. Recent chemical applications have included: Milestone, <br /> Escort XP, plus a dye and spreader/sticker added to the tank mix. <br /> Under the proposed 112c permit, particular attention will be paid to new areas of disturbance, such as <br /> stockpile areas for overburden and topsoil, earthen stormwater control structures at the perimeters of <br /> the site, and the margins of other processing/operating areas. Past areas of noxious weeds were <br /> measured at 0.6 acres by Fremont County. Given the expected increase in site disturbance,the weed <br /> areas are estimated to increase to about 2.0 acres. <br />