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wheatfields, and pastureland. The Division has previously approved a revegetation plum <br />and revegetation success standards. <br />Revegetation success for cover and production in the Williams Fork Strip Pit will be <br />verified try making a statistical comparison between the reference area and the reclaimed <br />area. Woody plant density will be a minimum of 1,000 stems per acre, and species <br />diversity will be measured using the Shannon-Weiner index. On areas of the strip pit <br />which had been disturbed prior to May 3, 1978, the standard will be a vegetative cover <br />of 30 percent or greater (based on vegetation sampling of this area prior to <br />redisturbance). In addition to this standard, a letter from the local NRCS (formerly <br />SCS) office or other acceptable reclamation experts stating, "The revegetated areas are <br />capable of being utilized per their post-mining land use," will serve as documentation <br />that the area has been successfully revegetated. <br />Reclamation success standards for the cropland and haylands are based on five yeazs of <br />historical production data shown in Tables 69 and 70. The area will be judged <br />successfully reclaimed when it reaches 90 percent of the historic production record, with <br />a 90 percf:nt statistical confidence. <br />Many areas of surface disturbance within the Eagle Mines permit azea were disturbed by <br />operations previous to the currently permitted Eagle No. 5 and 9 Mine workings. <br />Pursuant to Rule 4.15.10, standazds in previously mined areas shall not be less than the <br />minimum ground cover existing before redisturbance. Areas which fall under this <br />category are shown on Reclamation Plan Map No. 29. These areas will be deemed <br />successfully revegetated when the cover of perennial species on these areas is 30 percent <br />or greater. This is based on the cover data obtained during the 1983 sampling period on <br />a previously disturbed area near the No. SA Portal and an old reclaimed surface mine. <br />The survey data are given in Section 2.04 of the permit application. <br />On the remainder of the permit azea, including the waste disposal area, and all areas not <br />under cropland, hayland, or previously disturbed areas (before May 3, 1978), the <br />Division, with one exception, has approved utilizing a reference area methodology for <br />determining revegetation success. Herbaceous cover and production of the reclaimed <br />areas will be compared to the reference areas. Species diversity standards vary <br />depending on post-mining land use as set forth in Section 2.05 of the permit <br />application. The shrub standard on these areas will be 1,000 shrub stems per acre. <br />The one exception where the Division has not approved use of a reference azea is the <br />No. 9 portal area (pastureland reference azea D). REC has not yet submitted baseline <br />data for Reference Area D (for cover, production, and species diversity, as required by <br />Section 2.04.10); consequently, the following Stipulation 10 remains attached to the <br />permit. <br />30 <br />