2012-10-01_REVISION - M1977306 (22)

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placed in the decline. This is discussed in more detail in Exhibit E — Reclamation Plan. 3. Mine Water Treatment and Discharge: Excess water will need to be removed from the mine on an intermittent basis. As discussed in Exhibit G, groundwater inflow into the mine is attributed primarily to seepage from the water bearing zone immediately below the ore zone. This groundwater requires treatment prior to discharge into the local ephemeral drainage. Therefore, the mine water is pumped to a treatment facility on top of the mesa. Mine water management and treatment are the focus of this Environmental Protection Plan because it is these activities that place the mine project into the DMO permit category. Mine ore and waste storage as it pertains to the water management at JD -9 is also dealt with in this section. The mine water will be pumped on an intermittent, or as necessary, basis from a sump inside the JD -9 Mine to the surface for treatment. A 6 -inch HDPE pipe runs from the pump within the mine up a drill hole to the Upper Mine Area on the mesa above the portal. As can be seen on Map C — 2C, the untreated water goes through a treatment building, and then into a sequence of lined ponds on the mesa. The radionuclides present in the water then precipitate out and settle to the bottom of the ponds. The ponds sequence consists of a small initial pond where 30% of the precipitate will drop out, and a larger, long term pond where the remaining precipitate will drop out. Details of the designs and safety features of the treated water ponds are present in Section 7.2. Direct precipitation runoff from the ore stockpile pad will be directed to a sump that will be periodically pumped into the mine via a 2 -inch HDPE or equivalent pipe. This ore pad water will be pumped to the water treatment building on top of Monogram Mesa along with the mine water. (2) Maps Maps showing locations of ore and waste rock stockpiles as well as other affected lands can be found in Exhibit C — Maps. Maps showing all stormwater diversion structures can be found in Appendix III — Drainage Design Plan. Maps showing drill hole data, geology of the JD -9 area and soil maps are all found in this exhibit. (3) Identification of Other Agencies' Environmental Protection Measures and Monitoring Requirements Cotter has taken into consideration the following environmental protection measures: • The Colorado Discharge Permit System (CDPS) permit issued by the Water Quality Control Division (WQCD) established the limits for all chemical constituents that must be controlled in the discharge of treated water. A copy of this permit, which was issued in 2008, is included as Appendix II. The treated O'Connor Design Group Inc. U - 5