2012-12-06_REVISION - C1981008 (4)

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found on page 19 of the 2011 report. The production of desirable perennial grasses and perennial forbs averaged 106.49 grams per quarter square meter or 3,795.3 pounds of air - dry forage per acre. According to the sample adequacy equation found in Rule 4.15.11(2)(a), sample adequacy at the 90 percent confidence level, for "desirable forage production," was achieved with 26.49 transects and 30 transects were sampled. First year's forage production from the Irrigated Pasture Reclaimed Area IP -4 (old SL -12) Phase III are found in Appendix 1 - Table 8, Irrigated Pasture Reclaimed Area IP - 3 (SL- 12) - Production found on page 21 of the 2011 report. The production of desirable perennial grasses and perennial forbs averaged 79.65 grams per quarter square meter or 2,838.7 pounds of air -dry forage per acre. According to the sample adequacy equation found in Rule 4.15.11(2)(a), sample adequacy at the 90 percent confidence level, for "desirable forage production," was determined to equal 35.2 transects and 30 transects were sampled. Forage production from the Irrigated Pasture Reference Area are found in Appendix 1 - Table 4, Irrigated Pasture Reference Area - Production located on page 17 of the 2011 report. The production of desirable perennial grasses and perennial forbs averaged 70.53 grams per quarter square meter or 2,513.7 pounds of air -dry forage per acre. Application of the sample adequacy equation found in Rule 4.15.11(2)(a), sample adequacy at the 90 percent confidence level, for "desirable forage production," was determined to equal 78.2 transects and 30 transects were sampled. 2012 Phase III Revegetation Monitoring The results obtained from this monitoring effort performed by IME are contained in the attached report entitled Revegetation Monitoring Report for Phase III Bond Release Areas Sampled in 2012 on the Western Fuels - Colorado LLC - New Horizon NH2 Mine. One Irrigated Pasture Reclaimed Area was studied for final bond release in 2012, which included the previously sampled Irrigated Pasture IP -3 - Phase III containing 95 acres and the corresponding Irrigated Pasture Reference Area. The location of this Irrigated Pasture Reclaimed Area is found on Map R -3, SL -14 Bond Release Map. The second year's plant cover data for the IP -3 - Phase III Irrigated Pasture Reclaimed Area are found on Appendix 1 - Table 5, Irrigated Pasture Phase III Reclaimed Area - 2012 Plant Cover located on page 17 of the 2012 report. This table also contains the percent absolute cover by species, rock, bare ground, litter and relative cover values. "Allowable plant cover" averaged 86.47 percent. Application of the sample adequacy equation found in Rule 4.15.11(2)(a), resulted in sample adequacy at the 90 percent confidence level, for "allowable plant cover" being achieved with 0.5 transects and 15 transects were sampled. The plant cover data for the Irrigated Pasture Reference Area obtained from the 2012 sampling are found on Appendix 1 - Table 3, Irrigated Pasture Reference Area - 2012 - Plant Cover located on page 15 of the 2012 report. This table also contains the percent SL -14 03DEC12.wpd 48