2017-06-07_PERMIT FILE - C2010089 (3)

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4.0 CONCLUSIONS and RECOMMENDATIONS The reference areas selected for evaluation during the 2014 sampling effort represent those areas that are controlled by the mine and largely representative of the pre -mining soil types where the dryland pasture reclamation is situated. Considerations for each potential reference area and resultant implications on suitability as an appropriate target for a "standards base" for dryland pasture reclamation are as follows: Old Peabody Sage Reference Area Pros • Exhibits native sagebrush/grassland communities associated with Pinion/Progresso soils that represent approximately 61% of the pre -mining New Horizon permit area (Soils 77, 78, and 81). • Has been an approved reference area for reclamation in the past and likely demonstrated comparability during the New Horizon baseline evaluation. • Perennial cover and production are most similar to the perennial cover and production of the approved 2005 Dryland Pasture Reference Area. In addition, the relative cover (composition/distribution) of lifeforms is most similar to the currently approved reference area. • This site is controlled by the mine and easily accessible in close proximity to the reclamation. • Land management, including grazing and pest control, of the potential reference area analogous to management of the reclamation areas. Cons • Typically, reference areas should be 10 acres. This area is a little small at approximately 6 acres, however, it is still quite suitable. • Does not exhibit the improved species used for dryland pasture reclamation, but cover and production values are representative of the soil type. Attachment 2.04.1OC Page 22 May 2017 (TR -14)