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<br />• II. METHODS <br />TIMIlVG <br />Field investigation was undertaken during the period August 8-11, 1995. This time <br />' period coincided with anthesis and maximum development of the majority of plant <br />species found in both the native vegetation community (Osgood Sand Reference Area) <br />and the reclaimed areas at the mine site to be evaluated. Vegetation sampling <br />locations, dates, and methods were discussed with Mr. Tony Waldron of the Colorado <br />Division of Minerals and Geology. Mr. Michael Savage, Principal Investigator for the <br />project, met with Mr. Tony Waldron of CDMG on-site June 5, 1995 to evaluate plant <br />' development and agree on sampling methods and timing. The site was inspected <br />periodically in June and July to assess plant growth prior to sampling. <br /> SAMPLING DESIGN <br /> Prior to initiation of field work, the permit document and applicable maps were <br />' reviewed to evaluate topography, reclamation timing, seed mixes, revegetation <br /> methods, and applicable revegetation standards. <br />• A map of the mine site at 1:2400 scale (1"=200') was used to delineate the 1985, <br /> 1986, and 1987 revegetated areas (Coors Site Plan for Vegetation Sampling Locations; <br />' Cooper Aerial Survey, 11/24/94). On a gridded overlay of the revegetation map, a <br />Cartesian coordinate grid (100x100 feet) was established. Computer generated random <br /> numbers were used to establish a pool of x,y coordinates. Since the reclaimed areas for <br /> the three years to be evaluated were non-contiguous (i.e., they were separated by haul <br />' road corridors), each revegetated area was gridded separately, The acreage of each <br /> revegetated area was established. Fifteen random sample locations were established for <br /> each reclamation year's revegetated area. Within each year's revegetation, sufficient <br />i samples were established to represent each discontinuous area by proportional acreage. <br /> For example, the 1986 revegetated area contains three parcels (west, central, and east). <br /> The parcels represent 18%(west), 50%(central), and 32%(east) of the total 1986 <br /> revegetated area. Of ten total cover ttansects, two were taken in the west parcel, five in <br /> the central parcel, and three in the east parcel to achieve proportionate representation. <br />' Sample sites were located in the field through compass triangulation and pacing from <br /> known landmarks. Figure 1 illustrates the location of the 1985, 1986, and 1987 <br /> reclaimed areas and sample point locations. <br />' <br />'• <br />' -2 <br />