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The 90% values for cover and productivity are 57.5% absolute cover and <br />1080 pounds per acre respectively. <br />The operator recently submitted a technical revision (TR-11) that <br />requested, among other things, the elimination of the woody stem density standard <br />that formerly applied to the site (see page M-120). As a result of this revision, the <br />woody stem density standard was released. Because of this, woody stems were <br />not sampled. <br />... aox •a: • <u..'aav. •aa+J :uv:.aai+J.w. w? ax ? •. b. . <br />?a Ja..ttCCa:t4 • ' ? 6G .2C?? ' ?' <br />Sampling methods in 1996 were the same as those in 1995. The only <br />difference between 1996 and 1995 sampling involved sample placement. Grid and <br />plot/transect placement were changed in 1996 to ensure that last year's passing <br />parameter values were not simply a function of fortuitous sample placement. In <br />other words, sample locations from last year were not simply repeated in 1996. <br />The mine site consists of several reclaimed areas which, for the purposes of <br />this study, were sampled as a unit. Sub-units include the east and west side of the <br />Northern No. I mine (N 1 E and N 1 W respectively), the topsoil stockpile area for <br />the Northern No. 1 mine (NT), the Refuse Area (R), the Refuse Topsoil Stockpile <br />Area (RT), and the Rienau No. 2 mine area (R2) (see map). All but the Rienau <br />No. 2 sub-unit are within the property owned by Mr. Phil Jensen. As part of <br />discussions prior to the 1995 study, OSM, CDMG and the operator agreed that, <br />given the consistent set of success standards that apply over the entire site, and in <br />light of the relative proximity and similarity of revegetated sub-units, the whole <br />reclaimed area comprised a single sample unit. Sampling was on a proportional <br />allocation design as described on page 17 of the CDMG Bond Release Guidelines <br />(Guideline Regarding Selected Coal Mine Bond Release Issues, March 17. 1995) <br />3