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2.0 METHODS <br />2.1 SAMPLING DESIGN <br />Prior to initiation of fieldwork, the permit document and applicable maps were reviewed to <br />evaluate topography, reclamation timing, seed mixes, revegetation methods, management, <br />and applicable revegetation standazds. <br />Numerical designations were assigned to the reclamation areas to eliminate confusion and <br />facilitate future discussions in 2002. The numbers assigned to reclamation areas aze depicted <br />on the Vegetation/Revegetation Map. Only those azeas currently revegetated were assigned <br />numbers, starting in the northeast corner of the penaut area and proceeding clockwise through <br />the site. As additional azeas aze reclaimed and revegetated they will be assigned numbers. <br />A map of the mine site at 1:2400 scale (1 "=200') was used to delineate the revegetated areas <br />(Coors Site Plan; Vegetation Sampling Locations). On a gridded overlay of the revegetation <br />map, a Cartesian coordinate grid (50x50 feet) was established. Computer generated random <br />numbers were used to establish a pool of x,y coordinates. Since the reclaimed parcels for the <br />yeazs and azeas to be evaluated were non-contiguous (e.g., separated by road corridors or <br />reclamation years), each revegetated area was gridded separately. The acreage of each <br />revegetated area was established. Random sample locations were established for each <br />revegetated area. Within each yeaz's revegetation parcels, sufficient samples were established <br />to represent each discontinuous area by proportional acreage. The following table identifies <br />the location of each parcel quantitatively sampled, the acreage, and the number of cover and <br />herbaceous production samples taken. <br />Location Cover <br /># of sam les Herb. Prod. <br /># of sam les <br />1995 Reclamation Area <br />Area 16 1.7 ac. 1 1 <br /> <br />1998 Reseed/Interseedin s <br />Area 2 2.0 ac. 1 2 <br />Area 7 1.6 ac. 1 1 <br />Area 10 9.7 ac. 6 9 <br />Area 15 2.7 ac. 2 3 <br />Total Sam les Reseed/Interseedin s 10 15 <br /> <br />1999 Reclamation Areas <br />Area 5 2.6 ac. 2 2 <br />Area 9 (15.3 ac. 8 13 <br />Total Sam les 1999 Areas 10 15 <br />• <br />Coors Energy Company Keenesburg Mine Page 7 <br />2007 Revegetation Monkoring Report <br />