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revegetated areas at intervals of 3 , 7 , 9 and 10 years <br /> after initial revegetation efforts . Necessary data to <br /> assess herbaceous cover and production, diversity and <br /> woody plant density will be collected during each <br /> monitoring period on both the revegetated and reference <br /> areas . Although the line intercept method was used to <br /> collect baseline vegetative information, the more <br /> efficient point intercept method will be used to <br /> determine vegetative cover in the future. Cover sampling <br /> involves the establishment of random, 50 meter transects <br /> and the use of a standard 10-point frame. Vegetative <br /> diversity will also be determined using the vegetative <br /> cover data. Woody plant density will be determined <br /> utilizing belt transects along the sample lines <br /> established for vegetative cover measurements . Woody <br /> plant density will be determined using 50 x 1 meter belt <br /> transects along the cover sampling lines . <br /> 3 . Comparisons between reclaimed and undisturbed areas, in <br /> order to demonstrate that success criteria of Rule <br /> 4 . 15 . 8, 4 . 15 . 9, or 4 . 15 . 10 have been met, will be based <br /> on the following: <br /> a. Determination of revegetative success will involve <br /> a comparison of vegetative cover data for reclaimed <br /> and reference areas utilizing the t-test method. <br /> If absolute value of cover for reclaimed areas is <br /> greater than or equal to the calculated 90% <br /> confidence level for the reference area value, then <br /> the means between the areas shall be determined <br /> statistically equivalent and vegetative cover will <br /> meet regulatory success standards . <br /> b. Species diversity shall be considered adequate when <br /> the four dominant species, based on plant cover, <br /> comprise no more than 80% of the total species <br /> composition. The two dominant warm season grass <br /> species shall collectively comprise at least 50% of <br /> total plant cover composition. <br /> C . When the woody plant sampling data are greater or <br /> equal to the 90% confidence interval for <br /> corresponding revised woody plant counts, <br /> revegetation will be deemed adequate for woody <br /> plant density. Revised woody plant counts for the <br /> refuse pile and loadout areas are 7 . 6 and 6 . 3 stems <br /> Southfield Mine Permit Renewal 03 <br /> 50 <br />