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Table 3 - Small Area Exemptions (SAEs) <br />Name or location of Disturbed <br /> <br />SAE Sediment control Comment <br /> area <br /> acres Williams Fork River runoff would reach the river from <br /> and tracks 10-year, 24-hour event. <br />Wise Hill No. 4 and 0.19 acres <br />5 Wells and 0.31 Vegetative filter <br /> acres <br />Utah Tract 15.56 Perimeter diversion <br /> acres ditch and stock pond <br />B. Stream Channel Diversions <br />Exhibit 2 in the permit application contains the description and design drawings of <br />rock veins installed on the edge of the channel of the Williams Fork River for <br />erosion control. The Division approved the design in technical revision TR-31 <br />after making the specific approvals required by Section 4.05.4. These approvals <br />are: the veins were necessary to control erosion, they would be stable and require <br />infrequent maintenance, and they would establish or restore the channel to <br />approximate its natural meandering pattern with a geomorphically acceptable <br />gradient. <br />C. Sediment control <br />Information on the sediment control system is presented in Section 4.05 and in <br />Exhibit 18 of the permit application. Permit Map 26 shows the location of the <br />components of the sediment control system. <br />All surface disturbance at the Eagle Mine Complex, other than those areas <br />discussed above, is routed to sediment ponds designed to treat the water for <br />suspended solids. Runoff from the surface disturbance areas is routed to sediment <br />ponds by a series of diversion ditches. All undisturbed drainage, where practical, is <br />routed by collection ditches around the disturbed areas and discharges directly to <br />the natural surface water system. Therefore, the amount of runoff water needed to <br />be treated by the sediment pond is minimized. <br />D. Surface and Ground Water Monitoring <br />The permittee will monitor ground water and surface water in a manner approved <br />by the Division. The monitoring plans are set forth in Exhibit 29 of the permit <br />application. The Division has reviewed the ground and surface water monitoring <br />plans and found them adequate for identifying any impacts that develop. The <br />Division has approved the following monitoring plans for ground water <br />(4.05.13(1)(a)) and surface water (4.05.13(2)(a)). These plans are followed when <br />the operator is actively mining. The operator may follow a reduced monitoring <br />Eagle Mine Complex <br />C-1981-044 <br />20 <br />Permit Renewal 05 <br />May 22, 2009