2018-08-10_PERMIT FILE - M2017032

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GEOTECHNICAL STABILITY EXHIBIT (CONT) Page 2 August 10, 2018 the irrigation return flow ditch along the northeast part of the mine . I also point out here that along the entire south side none of the structures are located within 200 feet of the mining face except along the narrow band where the peninsula will be removed and in this area the slope will be mined 3h to iv. The information is presented based on the cross sections shown in this report and using the distances from them to deter- mine the safety factors from the proposed mining face closest to the structure . The location of the cross sections are shown on Map Exhibit C-2 - Mining Plan Map (option 2) . SECTION A - MEMEDA CHAINLINK FENCE - SAFETY FACTOR 10 . 5 - Is located in the southwest part of the permit area across the old Plant site area . The floor of the lake in that area will be approximately 4120 and the base of the fence is approximately 4145 . The top of the working face will be approximately 25 feet below and 375 feet north of the chainlink fence . Reclaimed slope SF = 11 . 1 SECTION B - MEMEDA TO PENINSULA SETBACK - SAFETY FACTOR 7 . 9 - Is located on the south side where the peninsula that divides the two lakes will be mined. The floor of the lake in that area will be approximately 4120 and the base of the fence is approxi- mately 4145 . The top of the mine face will be approximately 25 feet below and 248 feet northeast of the chainlink fence and the slope will be mined 3h to lv. SECTION C - SOUTH LINE CLOSEST STRUCTURE TO MINING - SAFETY FACTOR 5 . 8 - Is located on the south side where the peninsula that divides the two lakes will be mined. The floor of the lake in that area will be approximately 4120 and the base of the power pole is approximately 4145 . The top of the mine face will be approximately 25 feet below and 172 feet north of the power pole and the slope will be mined 3h to iv. SECTION D - LYTLE BUILDING TO PENINSULA SETBACK - SAFETY FACTOR 5 . 8 - Is located on the south side where the peninsula that divides the two lakes will be mined. The floor of the lake in that area will be approximately 4120 and the base of the building is approximately 4150 . The top of the mine face will be approximately 30 feet below and 167 feet north of the building and the slope will be mined 3h to iv. SECTION E - HANSEN BUILDING TO PENINSULA SETBACK - SAFETY FACTOR 4 .2 - Is located on the south side where the peninsula that divides the two lakes will be mined. The floor of the lake