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1 <br />~.: <br />_:. w. . <br />COAL COMH4NY <br />May 11, 1990 <br />Thomas Gillis <br />Reclamation Specialist <br />Colorado Mined Land Reclamation Division <br />1313 Sherman Street, Room 215 _ <br />Denver, CO 80203-2273 <br />RE: Noxious Weed Control Plan, File C-81-041 <br />Dear Tom: <br />As discussed over the phone May 9, the noxious weed white top was <br />identified on our roadside refuse pile by Dan Matthews on his <br />April 24, 1990, inspection. The report for that inspection <br />requires submission of a noxious weed control plan. The request <br />also specified a rapid response. In the interest of a rapid <br />response a site specific plan is being submitted fo:r this <br />location rather than a detailed mine wide plan. <br />White top (Cardaria draba) is a very common noxious weed in Mesa <br />County. According to Norm Luepschen of the Grand Vaalley Pest <br />Control District the best control means are herbicides. <br />According to Mr. Luepschen, the rhizome root structure of the <br />plant prevents effective mechanical control, and he was unaware <br />of any biological means of control. For control of white top <br />where other vegetation is of no concern he suggestec( Roundup and <br />for more selective control he suggest 2-4-D. Mr. Luepschen also <br />emphasized that now is the prime time for control measures to be <br />taken. <br />The attached portion of Map RS-i1-008 shows three general levels <br />of infestation. Approximately 0.7 acres has a heavy infestation <br />or over 50$ of the ground cover white top. Approximately 1.1 <br />acres has 10-50$ ground cover of white top and the remaining 3.8 <br />acres has 0-10$ ground cover of white top.' <br />For areas of heavy density the entire area will be sprayed with <br />2-4-D at a rate oP approximately 1 pound/acre and possibly <br />Banville at 1/2 to 1 pound/acre. The medium density areas will <br />be more selectively sprayed with 1 pound/acre oP 2-4-D and the <br />light density areas will be spot sprayed with 1 pound/acre <br />POWDERHORN COAL COMPANY • P.O. BOX 1430 • Palisade, Colorado 81526 • (303) 464-7951 <br />