2013-10-02_PERMIT FILE - C1981019A (3)

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RULE 2 PERMITS • The physicochemical soil data were compared with the topsoil and substitute topsoil suitability criteria shown on Table 2.04.9-5. A summary of the limitations of each soil profile by horizon and the estimated average salvage depth for each soil map unit is shown on Table 2.04.9-6. Topsoil salvage and handling for the South Taylor mining area are shown on Map 28B, Topsoil Handling -South Taylor. There appears to be few chemical limitations for salvage and use of soils for reclamation with the exception of clay content. The pH for the samples collected by Consol ranged from 6.5 to 8.6 with the suitability range of 5.5 to 8.5. Only two samples exceeded this suitability criterion. The highest specific conductivity reading was 1.3 mmhos/cm which is well below the level of concern (4.00). The highest SAR (sodium adsorption ratio) measured was 2.8 (values less than 11 are generally suitable). Soluble selenium levels were all below the detection level of 0.05 ppm, well below the 0.1 ppm level of concern. All samples had boron levels of 2.51 ppm or less. Levels of 5.00 ppm or greater are considered unsuitable. The saturation percent of all soils analyzed were within the acceptable range of 25% to 85%. Only two samples had a sand content of less than 15% and only one sample had clay content greater than 40%. The main limitation for soil suitability was the percentage of coarse fragments. The coarse fragments for each soil profile were obtained from the soil description tables in the CCC soil inventory report (CCC 1984). Soils were considered suitable to the depth where coazse fragments were no greater than 35%. Some soils were found to be suitable throughout the horizon (Silas, Lamphier, Burnette, Inchau, Rhone) and most were suitable on surface horizon. Only Waybe was found have excessive coazse fragments at the surface (60% coazse fragments from 0-3 inches). Each soil horizon was determined to be suitable or unsuitable. The weighted average depth of suitable • soil was then calculated for each map unit based on the suitable depth of each soil series multiplied by the percentage of the map unit which it comprises. The weighted average depth of salvageable soil calculations are summazized in Table 2.04.9-6A. Following the development in any one five-year mine azea the amount of soil salvage will be assessed to determine the need for assessing potential substitute soil sources. Order II Soil Survey -Lower Wilson Mining Area This section presents data assembled, collected, and analyzed specifically for the Lower Wilson mining azea. The mine plan for the Lower Wilson mining area has not been developed. The purpose of this section is to present and establish baseline data for the area. Prior to conducting any mining activities in the area, Colowyo will prepare and submit a permit revision to the CDMG and OSM for review and approval. General Soils Resource Information -The identification and proper management of soil resources in the Lower Wilson mining area is essential for the success of reclamation of any future disturbed areas and the achievement of the post-mining ]and use. The objective of this section is to meet the requirements of Rule 2.04.9 et seq by furnishing soils information for the Lower Wilson mining area in sufficient detail to determine the following: (1) Distribution, properties, and present and potential productivity of soils within the Lower Wilson mining area (595 acres) and the Lower Wilson North Hau] Road azea (21 acres); • (2) Suitability and recommended salvage depths of suitable soil materials available for use in reclamation of future disturbed areas associated with the Lower Wilson mining area and North Haul Road area. South Taylor/Lower Wilson -Rule 2, Page 53 Revision Date: 4/4/07 Revision No.: PR-02