2012-10-01_REVISION - M1978116 (17)

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Exhibit I Soils Information SM -18 Mine Permit Amendment M- 1978 -116 The major soil types found in the region of the SM -18 Mine as defined by the United States Department of Agriculture, Web Soil Survey (WSS) are: 1. 17 -Barx- Progresso complex 2. 23- Bodot, dry - Ustic Torriorthents complex 3. 76- Pinon - Bowdish -Rock outcrop complex 4. 87 -Rock outcrop 5. 88 -Rock outcrop - Orthents complex A complete description of each soil type as well as general locations of each type within the SM -18 permit area are included in the WSS report and map below. The main surface disturbance will occur in the Bodot, dry -Ustic Torriorthents complex (Soil map unit 23) and Pinon - Bowdish -Rock outcrop complex (Soil map unit 76). The Bodot, dry -Ustic Torriorthents complex component is found on terraces, structural benches and landslides. The parent material consists of residuum weathered from sandstones and shales. Depth to a root restrictive layer, bedrock, is 10 to 80 inches. The natural drainage class is well drained and water movement in the most restrictive layer is moderately low. The Pinon Bowdish Rock outcrop complex is relatively unproductive and thin with bedrock outcrops. SM -18 is divided into two main areas, the northern and southern areas. Northern Area: The original permit area is located approximately 1 mile to the north of the current mining area. It has been fully reclaimed. Top soil was spread to a thickness of 2 -6 inches and is successfully supporting vegetation. Southern Area: This is the current mining area. It is intersected by County Road U -18. On the west side of the road situated just over the rim rock is the main portal. Here the soils are shallow and lightly colored consisting of sandy loam and loam with a slightly higher clay content. A haulage ramp was built off the County Road to access the Wright mine portal. A berm was built along this ramp that extends around the portal creating an additional storm water catchment at the mouth of the portal. East of County Road U -18 is the main soil stockpile. It is protected from rainwater runon by a ditch running along the back of the pile and draining between the soil stockpile and waste pile. Some vegetation further protects it from erosion.