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3.8 Soils Information <br /> Subsurface information collected at the Three Bells Mine was provided to GEI by MMM. <br /> Review of this information indicates subsurface conditions can be categorized into three soil <br /> units, listed from soil surface down to bedrock foundation: overburden, sand and gravel, and <br /> bedrock. <br /> 3.8.1 Overburden <br /> Overburden material at the Three Bells Mine ranges primarily from sandy clays (CL) to <br /> clayey sands (SC). Laboratory testing indicates that percent passing the number 200 sieve <br /> ranges from approximately 43.1 to 86.1 percent. <br /> Overburden was encountered in mining Phases 1, 3, and 4. Overburden material was stripped <br /> from Phase 5 and stockpiled for backfflling. <br /> Information regarding the soil types found on the property was obtained from the Web Soil <br /> Survey, Natural Resources Conservation Service (NRCS), United States Department of <br /> Agriculture. The information is available at http://websoilsurvey.nres.usda.gov/. A Web Soil <br /> Survey for Three Bells has been conducted and is provided in Attachment B. <br /> Table 1: NRCS Soil types of the Three Bells Mine <br /> Soil Unit Name Acres Soil Type Percent Soil Type <br /> Caruso clay loam, 0 to 1 percent slope 128.0 40.1% <br /> Loveland clay loam, 0 to 1 percent slopes 114.5 35.8% <br /> Paoli fine sandy loam, 0 to 1 percent slopes 3.9 1.2% <br /> Riverwash 34.0 10.6% <br /> Satanta Variant clay loam, 0 to 3 percent slopes 13.4 4.2% <br /> Stoneham loam, 1 to 3 percent slopes 0.0 0.0% <br /> Table Mountain loam, 0 to 1 percent slopes 17.8 5.6% <br /> Water 7.9 2.5% <br /> 3.8.2 Alluvial Sand and Gravel <br /> Alluvial sand, gravel, and cobble (pit run) are the primary commodity mined by MMM at the <br /> Three Bells facility. The minable material within the Veldman Property has been depleted, <br /> and reclamation is ongoing. <br /> In the Ditullio Property, the alluvial sand and gravel ranges in thickness from approximately <br /> 4 to 18 feet. The average deposit depth is 10 feet. Laboratory testing indicates the alluvial <br /> deposit typically has less than 10 percent of material passing the number 200 sieve. <br /> GEI Consultants, Inc. 10 June 2014 <br /> Three Bells Mine Reclamation Permit Amendment <br />