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and aspect of the site, in degrees not corrected for magnetic declination, were determined and recorded, <br />as was the orientation of the transect. <br />Assessment of Reclamation Adequacy <br />DETERMINATION OF SAMPLE ADEQUACY <br />Sample adequacy for the data collected was evaluated based on total first -hit vegetative cover using the <br />following expression: <br />where: <br />n„, = minimum sample size <br />s = Sample variance (n -1 degrees of freedom) <br />d = Precision (0.10 for cover and production) <br />t 2 s 2 <br />nnn, _ (dx)2 <br />x = Sample arithmetic mean <br />t = The (a =.10) t -table value for a 1 tail t -test, n -1 degrees of freedom (infinite <br />degrees of freedom may be used if n >30) <br />n = Sample size <br />All such calculations were based on data from a minimum of fifteen samples. <br />ALLOWABLE HERBACEOUS COVER <br />For purposes of assessment of reclamation success, first -hit herbaceous cover data from reference area <br />sampling is used as per PSCM permit provisions. Hence, cover by shrubs and trees is deducted from <br />overall cover. <br />Similarly, cover data must be adjusted for excessive contribution by annual / biennial species (i.e. no <br />more than 10 percent relative cover or production, CDMG 1995, Guidelines Regarding Selected Coal <br />Mine Bond Release Issues, 1(IV) A(4)). Herbaceous cover and production values used in such <br />comparisons also must exclude values for species present on the Routt County Prohibited or Restricted <br />Noxious list or that are listed as noxious by the State of Colorado (Colorado Dept. of Agriculture, Division <br />of Plant Industry, Title 35, Article 5.5, 101 -119, Lists A and B of Rules as replaced 2003). Deductions <br />5 <br />