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1 <br />1 <br />1 <br /> <br /> <br />1 <br /> <br />1 <br /> <br />1 <br /> <br /> <br />1 <br /> <br /> <br /> <br /> <br />1 <br />SOILS STUDY PLAN <br />OBJECTIVES <br />The objectives of the soils study for the <br />I orencito Coal project are to determine the <br />salvage depths and volumes of suitable soil <br />within the proposed surface disturbance areas <br />and to determine if their is sufficient quantity <br />of soil material for use in reclamation. This <br />information is requved by Rule 2.04.9 of the <br />CDMG regulations. <br />METHODOLOGY <br />Soils of the project permit area will be <br />identified through mapping available from <br />the Natural Resources Conservation Service <br />(formerly Soil Conservation Service) and site <br />specific studies. Site specific studies will <br />include a detailed survey of the proposed <br />disturbed areas to determine topsoil quantity, <br />soil quality, and handling procedures for <br />reclamation planning. <br />SOIL SURVEY AND MAPPING <br />Prior to the initiation of field work, aerial <br />photos of the permit area will be closely <br />studied. Preliminary mapping boundaries <br />based on topographic locations, vegetation <br />types, geologic features, and previous soil <br />surveys will be delineated on the photos. In <br />the area of proposed surface disturbance, a <br />field study will be implemented to refuie <br />these mapping units. <br />two acres. Surface observations and <br />inspection of soil cores obtained from <br />manually operated soil sampling tubes will be <br />made to verify changes in soil types along <br />these lines. Phases of soil series mapped as <br />co-associations or complexes will be the units <br />delineated. The series phases will be based <br />on texture, slope, erodability, coazse <br />fragment, depth, or other diagnostic <br />parameter. <br />A pit will be excavated to 60 inches or <br />bedrock (whichever comes first) within each <br />mapping unit to describe a typical profile. <br />The mapping unit descriptions will be <br />consistent with the National Cooperative Soil <br />Survey. Included will be the. thickness and <br />physical description (structure, color, <br />texture, etc.) of each horizon. <br />A narrative description of the soil survey <br />results will also be prepared that describes <br />the characteristics of both the soil series and <br />the soil mapping units. The series description <br />will include the profile characteristics, <br />drainage class, physiographic position, <br />infiltration, permeability, and erosion hazard. <br />A prime farmland evaluation will also be <br />included. The mapping unit descriptions will <br />include their slope, percent soil type <br />composition, typical vegetation type, and <br />reclamation potential. The soils map will <br />exhibit the mapping unit boundazies, <br />disturbance boundaries, profile/sampling <br />locations, and a legend. <br />In these areas, a grid system of traverse <br />lines will be developed to map the soils to a <br />minimum mapping unit size delineation of <br />16 <br />