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4._J Location Cover # of sam les Herb. Prod. # of sam les 2000 Reclamation Areas Area 6 (4.1 ac. 6 9 Area 19 (3.2 ac. 4 6 Total Sam les 2000 Areas 10 15 2002 Reclamation Areas Area 23 0.66 ac. 1 1 Area 25 12.6 ac.) 1 1 Total Sam les 2002 Areas 2 2 Sample sites were located in the field through compass triangulation and pacing from known landmarks. Figures 1 and 2 illustrate the location of the reference and reclaimed areas and sample point locations for each azea sampled. A quantitative evaluation of revegetation success was undertaken this year in the 1998 reseeded or interseeded azeas, the 1999, 2000, and 2002 reclamation areas. The 1985, 1986, and 1987 azeas were previously monitored (1994-1998) and after successfully meeting revegetation success criteria, were released from the Phase R liability requirements by the Colorado Division of Minerals and Geology August 11, 1998. This year, qualitative evaluation of these azeas included estimating vegetative cover, herbaceous production, and identifying the dominant plant species. Any locations or trends in vegetation development that required attention were also noted. The 1995 and 1997 areas were previously monitored (1998-2004) and after successfiilly meeting revegetation success standazds a Phase II bond release application was submitted on July 1, 2005 and is currently under review by CDMG. The 1995 and 1997 reclamation azeas were qualitatively evaluated this growing season. The Osgood sand reference area was measured and mapped in the field in 1994 by Savage and Savage staff, and this scaled drawing of the reference area was used. On the scaled drawing, a Cartesian coordinate grid (50x50 feet) was established. Computer generated random numbers were used to establish a pool of x,y coordinates. Ten vegetation cover and fifteen herbaceous production sample locations were randomly established for the reference azea. Sample sites were located in the field through compass triangulation and pacing from known landmazks. 2.2 FIELD SAMPLING 2.2.1 Timing Field investigation was undertaken during the period August 8 through August 16, 2005. This time period coincided with anthesis and maximum development of the majority of plant species found in both the native vegetation community (Osgood sand reference area) and the reclaimed azeas at the mine site to be evaluated. Total annual precipitation at the mine in calendar yeaz 2005 was considered average with 13.14 inches; however precipitation was below average during critical times throughout the growing season. Precipitation at the mine Coors Energy Company Keenesburg Mine Page 8 2005 Revegetation Monitoring Report