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RULE 2 PERMITS <br />■ Topsoil borrow limitations <br />■ Permeability class <br />■ Wind erodibility group <br />■ Water erosion hazard "K" factor <br />■ General fertility discussion <br />A summary of information relating to soil suitability and recommended salvage depths is provided in <br />Table 2.04.9-20 and salvageable soil volumes are presented in Table 2.04.9-16. The information for each <br />map unit and soil series includes: <br />■ Map unit symbol and name <br />■ Acreage of each map unit in the proposed disturbed area <br />■ Soil sample location numbers <br />■ Total soil depth <br />■ Total salvage depth <br />■ Recommended topsoil/subsoil salvage depth <br />■ Primary borrow limitations <br />According to the suitable salvage depths of the encountered soils, it is apparent that a sufficient volume of <br />suitable soil exists in the proposed Collom mining disturbance area to ensure subsequent successful <br />reclamation, assuming all recommended suitable soil is salvaged and best -management practices (BMPs) <br />are employed during reclamation activities. Salvage of soils on slopes greater than 40 percent may be <br />impractical in this area; however, a sufficient volume of suitable soil should still be available for <br />successful reclamation assuming BMPs are used. The total disturbed acreage is estimated at <br />approximately 2353 acres. Table 2.04.9-20 presents the estimated salvage volume of topsoil within the <br />disturbance boundary. Should the entire disturbance footprint be disturbed at one time, the estimated <br />volume of topsoil available would cover the entire area with approximately one foot of topsoil. These <br />figures do not account any swell which is typically near 20 percent in this area. <br />Collom — Rule 2, Page 41 Revision Date: 12/30/16 <br />Revision No.: TR -108 <br />