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4.5.5.2003 Reclamation Area <br />Quantitative sampling was conducted in the 2003 reclamation area for the second time this <br />season. The small number and short duration of sampling precludes any observations <br />regarding long-term trends at this time. <br />5.0 SUMMARY <br />Quantitative monitoring of the 1998 reseeded or interseeded areas, the 1999, 2000, 2002 and <br />2003 reclamation azeas revealed that the all reclamation areas met the requirements for final <br />revegetation success for total vegetation cover. The 1999 reclamation areas met the total <br />herbaceous production reclamation success standazd (based on a statistical analysis). <br />Of the revegetated areas sampled in 2007, the 1998 reseeded or interseeded areas sampled <br />met the species composition revegetation success criterion. Though the 1999 reclamation <br />azeas did not meet the species composition success criteria, it was due to over-representation <br />by a warm season perennial native grass. Remaining areas lacked either qualifying warm <br />season species or cool season species. Table 1 reveals that the total number of species <br />encountered during sampling is significant and diverse in numbers of species, lifeforms, and <br />seasonal variety. <br />Though not all reclamation azeas met fmal revegetation success criteria, it was concluded that <br />the 1998, 1999, and 2000 azeas have established a diverse, effective, and permanent <br />vegetation cover of the same seasonal variety native to the azea and aze capable of self- <br />regeneration and plant succession in accordance with the requirements of the Colorado <br />Surface Coal Mining Reclamation Act. The 2002 and 2003 reclamation areas have shown <br />significant development of a diverse, effective, permanent vegetation cover, and aze expected <br />to continue in their successful development. <br />6.0 PEST AND DISEASE INSPECTIONS <br />Four quarterly inspections were conducted at the Keenesburg Mine to evaluate the presence <br />or potential for pest or disease infestations or outbreaks. The inspections were conducted on <br />Mazch 8, June 8, August 6-10, 21-24 and 27-31, and November 8, 2007. Inspection reports <br />from those inspections are located in the appendix. <br />During those inspections no disease conditions at any of the reclaimed and revegetated areas <br />were identified. No plant pests were found which were affecting the growth of the <br />vegetation. No bare areas, or azeas which appeared to be affected by infestation or blight <br />were found during the inspections. <br />• <br />Coors Energy Comparry Keenesburg Mine Page 24 <br />2007 Revegetation Monitoring Report <br />