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MR-117 H-26 Revised June 2025 <br /> instrument), and any cryptogamic crust. Cover data are recorded and reported by individual <br />plant species. The first interception is used to calculate total vegetation cover values. <br /> <br />Revegetation will be deemed successful for the success criterion of total vegetation cover if <br />the value of the sample mean from the reclaimed area is equal to or greater than 90 percent <br />of the value of the final revegetation success criterion for total vegetation cover (19.3%) with <br />90% statistical confidence. <br /> <br />2.9.3 METHOD FOR SAMPLING PRE-SMCRA (WITH REDISTURBANCE), <br /> UNDEVELOPED LAND RECLAIMED AREAS (CATEGORY C) <br /> <br />In re-disturbed pre-SMCRA reclaimed areas that have an undeveloped land post-mining land <br />use, revegetation sampling to determine reclamation success will be necessary only where <br />determined by the surface landowner and where necessary for surface erosion control. <br />These areas are identified in Table TR-A. <br /> <br />The applicable revegetation standard for such areas will be a technical standard for total <br />vegetation cover adequate to control erosion as specified in Section 2.8.3. <br /> <br />Quantitative sampling will employ the applicable methods for timing, sample <br />numbers/sample adequacy, and statistical analysis as described in Methods for Sampling <br />Post-SMCRA, Undeveloped Land Reclaimed Areas Using a Reference Area. <br /> <br />Total Vegetation Cover <br /> <br />The use of the point-intercept or line point-intercept methodologies will be used to estimate <br />vegetation cover. If the point-intercept method is employed, an ocular frame (e.g. ESCO <br />Associates or other manufacturer) will be used to minimize instrument error and maximize <br />precision and observer accuracy. Cover transects will be 25 meters in length, with two <br />sample data points collected at 1.0 meter intervals along the transect on opposite sides of the <br />transect centerline, 1.5m apart. Transect direction will be established randomly through the <br />use of computer generated random directions (0-360q). In no event will transects be allowed <br />to extend within ten feet of reference area or revegetated area boundaries to minimize <br />impacts from "edge effect." <br /> <br />For statistical purposes, each cover transect (comprising 50 data points) serves as a sample <br />unit. Data points recorded the first vertical "hit" on vegetation (above or below the <br />instrument), and any cryptogamic crust. Cover data are recorded and reported by individual <br />plant species. The first interception is used to calculate total vegetation cover values. <br /> <br />Revegetation will be deemed successful for the success criterion of total vegetation cover if <br />the value of the sample mean from the reclaimed area is equal to or greater than 90 percent <br />of the value of the final revegetation success criterion for total vegetation cover (19.3%) with <br />90% statistical confidence. <br /> <br />2.9.4 METHOD FOR SAMPLING PRE-SMCRA (WITH REDISTURBANCE), <br /> INDUSTRIAL/COMMERCIAL RECLAIMED AREAS (CATEGORY D) <br /> <br />In re-disturbed pre-SMCRA reclaimed areas that have an undeveloped land post-mining land <br />use, revegetation sampling to determine reclamation success will be necessary only where