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R 2 1NCORPORATED <br />ENVIRONMENTAL AND ENGINEERING SERVICES <br />STRATEGICALLY POSITIONED- ['ECI INICALLY PREPARED <br />MAY DAY IDAHO MINE COMPLEX <br />WILDCAT MINING CORPORATION <br />ORIGINAL 112(d) PERMIT <br />EXHIBIT G <br />Water Information <br />Rule 6.4.7 <br />ANDREW HARLEY,PH.D <br />GINNY KING <br />6.4.7(1) Statement of Effect on Surface Water and /or Groundwater <br />Due to the proximity of operations to surface water, specifically La Plata River and Little <br />Deadwood Gulch and the handling of designated chemicals, there is the potential to impact <br />surface water. Procedures described within the Environmental Protection Plan (Exhibit T — <br />Designated Mining Operation) will minimize the potential to impact surface water. <br />Tailings are proposed to be stored within the underground workings with the potential to impact <br />groundwater. Procedures described within the Environmental Protection Plan (Exhibit T — <br />Designated Mining Operation) will minimize the potential to impact ground water. <br />• 6.4.7(2) Affected Surface /Groundwater <br />(a) Map <br />The surface water bodies within the permit boundaries, and adjacent to, are presented in <br />Figure C -6, Exhibit C. <br />(b) Known Aquifers <br />The permit area is located at the northern boundary of the San Juan Hydrogeologic Basin <br />(Topper et al., 2003). The Morrison Aquifer is the only hydrogeologic unit of the San <br />Juan Basin present within the permit area. All of the water wells that were identified <br />within a. 2 -mile radius of the proposed May Day Idaho Mine Complex boundary are <br />completed in the Mancos Shale, the Dakota Sandstone or the Morrison Formation. <br />The May Day and Idaho mines are located within southward- dipping sedimentary rocks <br />cut by a series of east -west faults. The May Day Idaho Fault System consists of two <br />eastward- trending reverse faults, each with a downthrow to the south with vertical <br />displacement along the two faults of 350 -475 feet. The sedimentary units associated with <br />the San Juan Basin are shown below and a broader discussion is presented in Exhibit T <br />May Day Idaho Mine Complex 112(d) Permit Application <br />September 21, 2010 <br />"Strategically Positioned — Technically Prepared" <br />5555 DTC Parkway Suite A -4000, Greenwood Village, Colorado 80111 <br />Phone: (303)832 -7664, Fax: (303)832 -7469 <br />GEORGE M.L. ROBINSON,P.G. <br />J. ERICH RAUBER,P.E. <br />