REP49885 - Laserfiche WebLink

Home Browse Search

Location Cover Herb. Prod. # of sam les # of sam les 1998 Reseed/Interseedin s Area 2 2.0 ac.) 1 2 Area 7 (1.6 acJ 1 2 Area 10 9.7 acJ 6 9 Area 15 (2.7 ac.) 2 2 Total Sam les Reseed/fnterseedin 10 15 1999 Reclamation Areas Area 5 (2.6 ac J 2 2 Area 9 15.3 ac.) 8 13 Total Sam les 1999 Areas 10 15 Sample sites were located in the field through wmpass triangulation and pacing from known landmarks. Figures 1 and 2 illustrate the location of the reference and reclaimed azeas and sample point locations for each area sampled. In the areas reclaimed in 1985, 1986, 1987, 2000, 2002, and 2003 a qualitative evaluation of revegetation success was undertaken this year. The 1985, 1986, and 1987 areas were previously monitored (1994-1998) and after successfully meeting revegetation success criteria, were released from the Phase lI 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 areas revegetated in 2000 (Areas 6 and 19) and 2002 (Area 25) were qualitatively evaluated this year. Area 29 was seeded in the autumn of 2003 was briefly evaluated. 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 azea 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 area. 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 5 through August 11, 2004. 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 azea) and the reclaimed azeas at the mine site to be evaluated. Precipitation at the mine was significantly below average during the period from October 2003 to July 2004, revealing a 40.5 percent deviation below the mean for this time period. Average precipitation amounts between April Goore Energy Company Page 3 2A04 RevegeWtion Monitoring Report