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• of the site disturbed by mining. The reference area is shown on the Vegetation Map (Map 2). <br />This reference area is approximately 3 acres in size and is given the identical kind of management <br />found on adjacent areas of the same type. The premining land use of the mine plan is described <br />in Section 2.04.3. Vegetation sampling within the proposed reference area and reclaimed area will <br />be conducted utilizing point-intercept transects and production plots. Cover data for the area will <br />be collected using 25-meter transects. Each transect will have a total of 50 data points. <br />Production data will be taken by clipping 0.50 meter square plots. The plot frames will be placed <br />randomly throughout the azea to be sampled. Plants will be separated by species, clipped and oven <br />dried for weighing. The sampling will be done at an intensity that will satisfy the 90% confidence <br />interval for the grassland type vegetation. Data will be collected throughout the one liability <br />period to determine when vegetative cover equals that of undisturbed areas and when grazing <br />required under Section 2.05.5 is to be started. <br />In order to adjust for the effects of climatic conditions, such as precipitation and temperature on <br />plant growth, a correlation method will be employed whereby cover and production figures on the <br />disturbed area will be correlated with the values obtained on the designated reference areas. As <br />delineated in Section 2.04.10, no premine productivity data had been collected on the site; <br />however, during the summer of 1980 productivity data was collected in aeeas so that this data may <br />be available when determining postmining reclamation success. The premising cover and <br />productivity values were correlated with the pooled averages from the permanent reference areas. <br />Cover and productivity for the reclaimed sites can then be predicted to show the cover and <br />productivity that probably would have existed had the site not been mined. <br />Approved reclamation success standards are summarized below: <br />Cover. Vegetation cover will be restored on the disturbed areas to 90 percent of the vegetation <br />reference area. <br />Production. Vegetation production will be restored on the disturbed areas to 90 percent of the <br />vegetation reference area. <br />Species Diversity. Establish two perennial cool season grasses and two perennial forbs with at <br />least 3 %, but less than 40% relative cover, and any combination of perennial warm season grasses <br />with at least 6% relative cover and no upper limit. <br />Assessment methods for revegetation success are described in Exhibit 6 and will comply with the <br />guidelines of the CDMG. Assessments will be conducted in years 4 or 5, 7, 9, and 10. Years 9 <br />and 10 will also incorporate the grazing assessment to determine the capability to sustain the post- <br />mining land use. <br /> <br />2.05-5 Revised 6/16/98 <br />m~-/o <br />