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Permit Amendment (AM-06) - Climax Mine <br />CM0000082 <br />Phase II Deposition. During Phase II Deposition, process water will receive first-stage treatment at the SDP, <br />® in the Tenmile TSF water pool, or in the Mayflower TSF water pool and second-stage treatment at the <br />PDWTP. <br />Also during Phase II Deposition, a new reclaim water pumping system, the Mayflower Pump Barge, will be <br />required to deliver process water from the Mayflower TSF water pool to Robinson Lake through the Tenmile <br />Tunnel. The tailing delivery line will need to be extended from 3 Dam to 5 Dam and a new tailing distribution <br />system on 5 Dam will be required. A general arrangement of the Phase II Deposition period system <br />configuration is shown on Figure AM-06-G-02 and a schematic depiction of the system is shown on Figure <br />AM-06-G-10. <br />G-4.2 TSF Development <br />The general tailing deposition methods described in the Phase I Deposition section of this exhibit are expected <br />to also be utilized for deposition onto Mayflower TSF. Modifications and adjustments will be made as <br />necessary to safely develop the TSF. Mayflower TSF, which is formed by 5 Dam, is an existing facility that <br />was initially developed in the 1970's. The current mine plan calls for the deposition of approximately 180 <br />million tons of additional tailing in Mayflower TSF. The additional deposition is expected to raise the dam crest <br />from its current elevation at about 10,610 feet to about 10,820, which constitutes a 210-foot raise. As shown <br />on Figure AM-06-G-02, tailing slurry will be delivered to Mayflower TSF through a combination of new and <br />existing tailing delivery lines (Mayflower TDL) that will generally follow the route of the existing tailing delivery <br />line that extends from 3 Dam to 5 Dam. From the mill to 3 Dam, the new TDL installed as part of the Phase I <br />system will continue to be used. The existing ETDL will continue to be used to route impacted water sources <br />to the SDP. Tailing will be deposited in Mayflower TSF utilizing the upstream deposition method by operation <br />of a header and spigot system along the crest of 5 Dam. <br />G-4.3 Fresh Water Interceptor and Bypass Systems <br />As shown on Figure AM-06-G-02, significant changes to the fresh water interceptor and bypass facilities are <br />• not expected for the Phase II Deposition scenario. The system will remain as previously described. <br />G-4.4 Mill Water Reclaim Systems <br />During the Phase II Deposition period, the mill water reclaim system will continue to operate generally as <br />described for Phase I Deposition with the addition of the Mayflower Pump Barge. This barge will be located in <br />the Mayflower TSF water pool and will deliver water to the North Portal of the Tenmile Tunnel. As in Phase I <br />Deposition, the first priority water that will be delivered to the mill will be the impacted water and tributary <br />inflows delivered to the SDP and Tenmile TSF. Supernatant from Mayflower TSF will be delivered to <br />Robinson Lake at times when the upstream sources are inadequate to satisfy the mill water demand or when <br />there is storage space available in Robinson Lake. <br />G-4.5 Makeup Water Systems <br />During the Phase II Deposition period, the mill water makeup system will generally be as described for Phase I <br />Deposition. However, in addition to the sources previously identified, water stored in the Mayflower TSF water <br />pool will provide a source of makeup water. This storage water would be delivered to Robinson Lake using <br />the Mayflower Pump Barge. Supply Canal No. 2 can be used to provide additional makeup water as needed <br />to meet the mill demands or to refill Robinson Lake or the Mayflower TSF water pool. <br />G-4.6 Impacted Water Sources <br />The Phase I Deposition scenario is not expected to significantly change the sources of impacted water. <br />Impacted water will be used in the mill water circuit, which is expected to reduce the annual volume of <br />impacted water that will be treated and discharged from the site. However, the additional tailing deposition in <br />Mayflower TSF is expected to result in an increase of seepage flows at the toe of 5 Dam. Also, as the aerial <br />extent of the overburden storage facilities increases, the generation of additional impacted seepage from <br />these facilities is expected. These seepage flows will require collection and treatment, similar to other <br />Exhibit G G-9 May 2010