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Utah Tract <br />EC is responsible for reclaiming the area known as the Utah Tract depicted on Map 20, Vegetation Map. This area <br />was originally mined and reclaimed by Trapper Mining, Inc. Trapper has designated two different range sites within <br />the Utah Tract. However, within the immediate area adjacent to the Utah Tract, three range sites, as defined by <br />Trapper Mining, are identified; the distinction between the range sites is based upon elevation. Range site A is an <br />areas located above 7,200 feet range site B is located between 7,200 feet and 6,700 feet, and range site C is located <br />below 6,700. The following tables identify species associated with these three range sites. <br />The Utah Tract is traversed by range site A and B. The success criteria established for the Utah Tract will focus on <br />comparisons made between the individual reclaimed range site and its associated reference area. The reference are for <br />the A range site is located within the south central portion of the N/2 SW /4. Section 2, T5N, R91W (reference site 5) <br />and the extreme northwest portion of the SF/4 SW /4, Section 30, T6N, R91 W (reference site 6). Reference sites 5 and <br />6 are located on Map No. M17, Vegetation Available for Domestic Grazing Under Utah Surface Control, of the <br />approved Trapper Permit, No. C -010 -81. The reference site for range site B is shown on EC's Map No. 20, <br />Vegetation. <br />The following methodology will be used to evaluate the reclaimed site to its appropriate reference area. <br />Revegetation of the reclaimed sites will be deemed successful when measurements of reclaimed total cover and <br />herbaceous production are at least 90 percent of the cover and production values for the reference area with 90 percent <br />statistical confidence. If total cover and herbaceous production on the revegetated area are determined to be less than <br />the reference areas, or on- tailed "t" test will be performed to determine if there is a statistically significant difference. <br />Based on this test, revegetation will be deemed successful when the calculated "t" is less than or equal to the "t" value <br />from the one - tailed "t" distribution table. The following equation, which is from page 22 of the DMG Vegetation <br />Guidelines, will be used to evaluate vegetation success. <br />4 =2 —x <br />S, <br />Where: Q — 90% of the standard <br />x Bond release block sample mean <br />S, = Standard error of the mean (sN n) <br />S = Sample Standard deviation <br />n = Sample size <br />t� = Calculated t value <br />The diversity standard for this site will be successfully met when four species make up 60% of the relative permit <br />composition in the reclaimed site and no single species will contribute more than 40% of the relative composition. <br />The shrub standard for the Utah Tract will be established at 1,000 stems per acre. The same statistical requirement <br />presented for herbaceous cover and production will apply also to the shrub standard. <br />Field sampling will meet a statistical minimum of 90% confidence with 10% precision. Adequacy of sample size will <br />be determined using the following formula. (DMG Vegetation Guideline, page 20). <br />Nm = t — t LLL) <br />(dQ)z <br />Permit Revision 04 -34 2.05 -35 Revised 7/2/04 <br />