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r'~~ S. <br />;. • ( ~ <br />Colorado Yampa Coal Company <br />• A Subsidiary of Getty Coal Company <br />Ms. Sandy Emrich <br />Colorado Mined Land <br />Reclamation Division <br />423 Centennial Building <br />1313 Sherman Street <br />Denver, Colorado 80203 <br />P.O. Box 774288 <br />Steamboat Springs, CO 80477 <br />(303)879-3800 <br />August 23, 1983 <br />Re: Adequacy Response to the Technical Revision of Permit 79-177, <br />Area 6 Sedimentation Ponds <br />Dear Ms. Emrich: <br />Enclosed in this letter please find the Colorado Yampa Coal Company's <br />responses to the adequacy review questions for the sedimentation ponds on Area <br />6, Mine 2. <br />,• The 1980 and 1981 reclamation seedings in Area 6 and the corresponding <br />Pasture Reference Area were sampled in August, 1983. Cover was estimated using <br />a 10 point frame along a SO meter transect, with 100 points per trasect. <br />Production was estimated by using 3 'im2 clip plots placed randomly along a 50 <br />meter transect. All perameters were measured to a level of 90L of the mean with <br />a lOZ confidence interval. The data collected on Area 6 and the corresponding <br />reference area shows the revegetated area to have a higher percent plant cover <br />and plant production as demonstrated by Table I. <br />Water perameters measured from overland flow of Area 6 are within the NPDES <br />requirements, as presented-in~abte-~I. - - <br />Water and vegetation field data collected from Area 6 indicate the site <br />meets the requirement of CMLRD Regulatibn 4.03.2. " <br />If I can be of any further assistance, feel free to call at the above <br />letterhead address. <br />Sincerely, <br />David McMindes <br />. Environmental Coordinator <br />cc: B. Batker <br />Ex. 29-29 <br />