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1 <br />1 s~ r~ oa;~, <br />' • The vegetation on the test plots was sampled during the summer of 1992. Sampling will <br />be repeated in the summer of 1993 and 1995. Cover and woody density sampling will <br />1 be performed in 1992 and 1993. Covei, woody density, and production sampling will be <br />conducted in 1995. A woody plant rooting depth study will also be conducted in 1995. <br />No studies are planned for 1994. <br />1 • Cover sampling within plots will entail 5-10 systematically or randomly located 100 foot <br />transects with 5 systematically or randomly spaced 10 point frame placements per <br />1 transect. Woody density data will be estimated from 2 meter wide belt transects run <br />along each cover transect. For production sampling, a minimum of 10 randomly located <br />one m= quardrats per plot will be used. Sample adequacy will be set such that estimates <br />1 are within 10% of the true mean at the 90% level of statistical confidence. <br />• Rooting depth of the major species of woody plants within the various plots will be <br />1 evaluated. A number of soil pits will be dug within each plot in the final year of the <br />study and results of the evaluation will be included in the final report. <br />1 • The plant sample will be analyzed for selenium and boron content if the pre-reclamation <br />investigation shows a high concentration of these elements in the refuse, topsoil or <br />subsoil. <br />1 • The data gathered will be statistically evaluated and interpreted against the revegetation <br />1 success criteria established during the pre-reclamation investigation. The sagebrush- <br />wheatgrass reference area will be sampled during 1995 to provide input for establishment <br />of revegetation success criteria. <br />1 • Conclusions will be drawn as to the revegetation success with different test plots and for <br />various cover depths. <br />1 Communication with Colorado Division of Minerals and Geology <br />1 A close communication will be maintained with DMG through this study. The Division's <br />consent has been obtained regarding this plan of study. Information gathered from the pre- <br />1 reclamation investigation has been submitted for the Division's review. Decisions regarding <br />the topsoil/subsoil thickness have been made in concert with DMG. Results of periodical <br />post-reclamation study will be submitted and comments will be sought. If it is determined <br />1 that atopsoil/subsoil cover of less than four feet can achieve successful revegetation, an <br />application for a variance from the four foot cover requirement will be submitted to DMG. <br />1 ~® <br />1 ~ <br />1 <br />