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2.0 METHODS <br />2.1 SAMPLING DESIGN <br />Prior to initiation of fieldwork, the permit document, revisions under Technical Revision 77, <br />applicable maps, and Google Earth" aerial photography were reviewed to evaluate topography, <br />reclamation timing, seed mixes, revegetation methods, management, and applicable <br />revegetation standards. <br />Map 2.05-M1 (General Facilities and Gob Vent Boreholes sheets) of the mine site were used <br />to identify, locate and delineate reclaimed areas and individual reclaimed sites. As the <br />reclaimed sites are irregularly dispersed over the mine site, and the sites range from 0.20 to <br />6.10 acres in size, standard methods of gridding the reclaimed areas and generating random <br />sample points were not practical. As the reclaimed areas ranged in age from three to five years <br />in age, it was desirable to obtain a representative sampling of the age structure in the sampling. <br />The reclaimed sites, their areal extent, and age were entered into a Microsoft Excel' <br />spreadsheet. The area of each reclaimed site was calculated as a percentage of the total area <br />of reclaimed areas, as was the total area of eligible reclaimed locations within the reclamation. <br />By selecting an initial number of total samples, locations for sampling by representative area <br />and reclamation year were assigned. The extended reference area was quantitatively sampled <br />immediately adjacent to reclaimed area sample sites sampled in 2020 (including Phase II and <br />Phase III sites). <br />Sample locations within each sample site were randomly determined by use of a 50'x50' grid <br />representing the reclaimed site. For example, where a reclaimed site was one acre in size, a <br />50'x50' grid yielded sixteen potential sample points. Where the reclaimed site was <br />predominantly linear in nature (as was the case with reclaimed access roads), the overall length <br />of the reclaimed site was determined, and sufficient random numbers generated to allow for <br />sample points on a one hundred foot spacing. A sample point within the reclaimed site was <br />then selected using a random numbers table. Sample point locations were located in the field <br />through compass triangulation, GPS, and pacing from known landmarks. The Appendix <br />contains an image of the area of the reclaimed areas and extended reference area. <br />Oxbow Mining, LLC Elk Creek Mine Page 3 <br />2020 Phase 11 Bond Release Vegetation Report <br />