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8. State law requires that Canada thistle, being a noxious weed, be controlled to prevent its spread and further <br />infestation. An adequate weed control plan exists for the permitted site. The 8126/03 inspection revealed presence <br />of several known patches of Canada thistle, some of which did not appear to be affected or stressed by any recent <br />herbicide application. Future inspections will indicate whether the existing plan is effective. If future inspections <br />reveal that the thistle or another noxious weed species has infested new areas this could become a problem, and <br />require implementation of a more aggressive plan. For now, please be aware that diligence and proper timing <br />remain important. Please also be reminded that your responsibility may extend beyond the reclaimed areas to <br />include the entire permit area. For now this item is adequate. <br />9. Newly reclaimed areas, with little established vegetation, may have a higher probability of becoming weed <br />infested. But new infestations have a better chance of quicker and complete eradication. Future monitoring and <br />prompt treatment as needed are especially important in these areas. <br />8126/03 Inspection Report <br />Vadose zone piezometers are still in place, but there may be interest in removing them. Prior to any removal <br />activity, you state that a plan will be submitted for the Division's review and approval. This is adequate at this <br />time. <br />Recent grading of dump material at the 9360 and 9700 level dumps has brought numerous old debris items to the <br />surface, and future settling and/or erosion is expected to expose even more. You state that monitoring will be <br />performed and these items will be removed for disposal. This is acceptable to the Division. <br />Your response submittal included another map, showing the closed vent shaft location in Area E. The apparent <br />wellhead feature observed by the Division during the 8/26/03 inspection, in or near Area E, was described in your <br />response to not be the remaining surface expression of the reclaimed vent shaft. The actual closed vent shaft is at a <br />different location which will be checked during a future inspection. The well, however, was described to belong to <br />Homestake. Please provide additional information about the well if possible, such as whether the well has been <br />properly closed, or, if it is still open, what plans Homestake has for its closure or continued use. <br />If any aspects of these items demonstrate that my interpretation of the information is incorrect, please respond with <br />the correct information. I may be reached at the Division's Durango field office: 701 Camino del Rio, Room 125, <br />Durango, CO 81301; telephone 970-247-5193 or fax 970-247-5104. <br />Si~njcerely, <br />Bob Oswald <br />Environmental Protection Specialist <br />Ec: Harry Posey, DMG <br />A:\bulldog trl l resp adeq/rco <br />