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• species comprising no more than 83 percent of the total relative percent cover and with no single <br />species contributing more than 40 percent of the total relative cover. At least one of the four <br />dominant plant species shall be either a shrub or a fort species. <br />His~rrrical Dsta. To properly evaluate vegetation trends overtime, we compared data <br />previously collected during the 1980 baseline period as found in the Ken: Permit as well as <br />previously collected revegetation monitoring data. The Kerr Pemrit data is referenced by the <br />Permit number, while the data crrliceted by Rocky Mountain Reclamation (KM[i} in 1996 <br />entitled "1446 Vegetation Sampling for hrterim Monitoring and Borrd Release" is cited as the <br />RMR 1996 data. Revegetation monitoring data coliectcd in 1494 by l:SCO and enti4cd "Report <br />of t~ findings - Rcv:larrvation Monitoring -Kerr Mine - Jackson County, Colorado" is cited as the <br />ESCO 1949 data. Lastly, and most importantly, we compared the data collected in 2005 with <br />that collected in 200G. Other that the 2005 data, these historic data are included only to <br />docume~ historic trends and not in any way to satisfy any of the required bond release <br />vegetation sampling requiremerns. <br />S#m#7ytirarl Ana~sis of As required by the Division's recently enacted regulations, it is not <br />ncscssary to achieve sample adequacy for reclamation monitoring corresponding to the Phase IQ <br />tx>nd rcls.~rsc sampling efforts provided that the success standard has been achieved, the reverse <br />null hypothesis is used and a minimum number of transects have been sampled. If samplc <br />adequacy is achieved, a minimum of a least 15 transccts for cavcr and 30 transects for <br />production and shmb density must still be collected. Therefore, all afthe data c;oliectcd in this <br />• evaluation were; analyzed for sample adequacy in order to detemrine whether the Division's <br />requirements had been satisfied. The new sample adequacy formula contained in the revised <br />regulations was used, wherein a precision of 0.10 was used for cover and production and 0.15 for <br />shrub density. <br />On the reclaimed and reference areas sampled, all of the field data were analyzed in terms of <br />"total plant cover" to determine whether sample adequacy was achieved prior to leaving the site <br />being sampled. On the reclamation blocks and reference areas sampled for production, a <br />minimum of 30 samples were collected and the data analyzed before the reverse null approach <br />was applied to determine revegetation suceess. On all ru:laimed sites sampled for shrub <br />density, a minimum of 30 samples were collected and the data analyzed before the reverse null <br />approach was applied to determine revegetation success. <br />Auurdins ko written lnridance received from Mr. Dan Mathews and Ms. Sandy Brown of the <br />RMS, prior to Lhe commencement of the 2005 vegetation sampling, if sample adequacy is <br />achieved for both the re~claimcd and reference areas, and the reclamation sample mean exceeds <br />90% of the standard, no statistical testing is reyuired and sur:cess is demonstrated by direct <br />comparison_ If sample adequacy is net achieved far one or both of the reclaimed or reference <br />areas sampled, but the reclaimed sample min excx;eds 40% of the approved standard, the <br />reverse null hypothesis can be used <br />• <br />