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<br />- MINE I.D.: <br />U ~'a419` <br />Phase II Bond Release Study <br />- SAMPLE DATES: Late June or early July. <br />w.ro~lc ~~~ <br />C-89-o9`~ <br />MINE SUMMARY <br />- MINE LOCATION: Las Animas County, between approx. 6480' and 6640' <br />elev. <br />- MINE ACREAGE: Main disturbed area: 7.89 + 0.52 acres <br />SAE # 1:0.22 acres. <br />SAE # 2: 1.25 acres. <br />SAE # 3: 0.28 acres. <br />SAE # 4: 0.01 acres. <br />SAE # 5: 0.12 acres. <br />(TOTAL SAE = 1.88 acres) <br />- PARAMETERS: Cover (and species diversity). <br />- SAMPLE HISTORY: No previous sampling known. <br />- SUCCESS: Based on comparison to standards. <br />Page 4 of the approved permit document states that success will be based <br />on technical standards as follows: <br />Herbaceous Cover: 43`Yo <br />Species Diversity.• At least three warm season grasses, two <br />cool season grasses, and one perennial forb, each <br />contributing at least 3% but no greater than 403 relative <br />cover. <br />METHODS <br />QUANTITATIVE SAMPLING -GENERAL: <br />- MINIMUM SAMPLE NUMBERS: 10 transects. This minimum is <br />proposed due to the small area of the reclaimed surface. <br />-ADEQUACY: Will be sampled to adequacy (using statistical calculations <br />given on pages 20 and 21 of the Division's Bond Release Guidelines ( i 1'ne <br />Reeard' Q Selected Coal Mine Bond Release Issues) unless sample adequacy is so high <br />that the number of samples would begin to negatively affect the accuracy of the sample. <br />Should the latter scenario occur, the Division will be consulted. <br />- SAMPLE UNIT: The reclaimed areas (including the SAE's) will be <br />considered to be a single sample unit to be compared as a whole to the technical <br />standard. <br />- RANDOM: Selection of sample locations within each the reclaimed <br />community will be random, and will involve the selection of points from a gridded <br />map. <br />- FIELD PLACEMENT: Location of sample points in the field will be with <br />compass and pacing. <br />- MAP: Approximate location of sample points will be designated on a map <br />that will be enclosed with the report. <br />TOTAL VEGETATIVE COVER: <br />- Total vegetative cover will be estimated using an optical point frame <br />developed by ESCO Associates. <br />- Cover transects will originate from the sample point locations. <br />