2017-09-28_REVISION - M1981185 (145)

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R? INCORPORAM ENIVIRON.WNTAI \NI)I'NGINF-I?RING. SF.R\'ICf> STRATEGICALLY POSITIONM-TEC'I INICALLY E'REPARED MAY DAY IDAHO MINE COMPLEX WILDCAT MINING CORPORATION ORIGINAL 112(d) PERMIT EXHIBIT I Soils Information Rule 6.4.9 An evaluation of soil samples was undertaken within operational areas of the May Day -Idaho Mine Complex. This section reports the soil resources on the project site for determining the soil types and characteristics, and also the suitability and amounts for use as plant growth media ("topsoil") during reclamation. Based on previous studies and 2010 field work, a baseline map of the location of the soil types and an assessment of the physical and chemical characteristics for reclamation and revegetation are presented. 1.0 General Description of Soil Resources A Customs Soil Report was prepared for the general area using data available at the Natural Resources Conservation Service (MRCS) website (Attachment I-1). Two soil surveys are reported for the permit area: • Animas -Dolores Area, Colorado, parts of Archuleta, Dolores, Hinsdale, La Plata, Montezuma, San Juan and San Miguel Counties (C0672); • La Plata County Area, Colorado (C0669). A combined map of both surveys was prepared (Figure I-1). In both surveys, the dominant soil type was the Nordicol very stony sandy loam, 6 to 25 percent slopes with the following characteristics applicable to reclamation at the site: • Landform: Mountain slopes • Parent material: Slope alluvium and colluviums derived from sandstone • Drainage Class: Well drained • Available water capacity: Low • Maximum salinity: Nonsaline. The typical profile for this soil is: • 0-1 ": slightly decomposed plant material; • 1-7": Very stony sandy loam • 7-20 ": Very stony loam; • 20-28 ": Very stony sandy loam; • 28-52 ": Very stony sandy clay loam; • 52-61 ": Extremely stony sandy loam. May Day Idaho Mine Complex 112(d) Permit Application M1981-185 Revised August 10, 2017 Phone: (303)832-7664, Fax: (303)832-7469