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2.2.4 Species Composition <br />Species composition information was derived from quamitative vegetation cover data. <br />Relative cover information provided a basis for evaluation of the importance of each <br />encountered plant species and lifeform and for comparison to the final revegetation <br />success criterion. <br />2.3 SAMPLE NUMBERS/SAMPLE ADEQUACY <br />For the purposes of this monitoring, set numbers of samples were established for the <br />pazameters to be sampled by Savage and Savage and Coors Energy Company. The <br />number of samples taken for each reclamation yeaz was consistem with numbers agreed to <br />is the past by CDMG. In each revegetated area, the size and number of parcels dictated <br />the total number of samples taken, as described above. <br />Since the purpose of this sampling was the monitoring of the vegetative condition at the <br />revegetated areas of the mine and Osgood sand reference area, sampling need not meet <br />sample adequacy requirements. Minimum sample sizes and standard deviation are <br />reported as an indication of variability of the sampled pazameters. Comparisons between <br />sample mean pazameter values assume that the sample mean value accurately represems <br />the population mean in all cases. <br />2.4 SPECIES IDENTIFICATION AND VERIFICATION <br />• Species identification was accomplished in the field through the use of plain idemificarion <br />keys (Hazzingtoa, 1954, Weber, 1990; Whitson, 1987; Zimdahl, 1990, Stubbendieck, et al, <br />1995). In cases where plant idemification was inconclusive in the field, voucher specimens <br />were pressed for lab identification. <br />3.0 RESULTS <br />3.1 QUANTITATIVE EVALUATION: REFERENCE & RECLAMATION AREAS <br />3.1.1 OSGOOD SAND REFERENCE AREA <br />The Osgood sand reference area represents approximately 3.4 acres of undisturbed native <br />vegetation within the Keenesburg Mme permit area. The reference area is sited <br />immediately west of the mine access road and has been fenced to prevent grazing by <br />domesticated livestock. The reference azea is flat and exhibits sheet flow drainage to the <br />east-southeast. Soils are generally sandy in texture, with little incorporated organic <br />matter. <br />The vegetation community was visually dominated by the woody shrub Artemisia filifolta <br />(sand sage), and cool season graminoid Stipa vtridula (green needlegrass). Three warn <br />r1 <br />I..J <br />Coors EnergyCompary Page 6 <br />2008 Reragetatlon MonfWring Report <br />