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silo pad through a pipe culvert. The main Scullion Gulch diversion is approximately 2,750 feet long <br />• and the tributary diversion is approximately 312 feet long. The Scullion Gulch diversion was <br />designed in accordance with Rule 4.05.4 requirements for permanent diversion of intermittent <br />streams as the stream has watersheds in excess of one square mile. The requirements for <br />permanent diversions were adhered to due to the expected long life of the mine. The diversion of <br />Scullion Gulch at the "D" Portal Area was constructed at the start of grading operations. It will be <br />regularly inspected and maintained during mine operation. Details of the diversion design are <br />presented in the Reclamation Plan. The layout and profile of the diversion is presented in Maps 29, <br />30 and 31. Calculations are included in Illustration 9. Maps 21 and 23 show the drainage areas for <br />this diversion. The existing channel, plan, profile and cross - sections are shown on Maps 36, 37, 38 <br />and 39. The stream diversions at the "D" Portal Area will be removed or buried on site at the end of <br />active mine operations and the stream channel will be returned (approximately) to its original <br />meandering path and gradient as shown on Maps 40, 41 and 42. <br />IV.J.5 Small Area Exemptions <br />The small areas shown on Map 147 have been exempted from the requirement for sediment pond. <br />Illustration 44 provides SEDCAD runs to estimate runoff volume and to show that settleable solid <br />effluent limitations are not exceeded. <br />The small area exemption demonstration also outlines plans for sediment control in each case. <br />• - <br />• Technical Revision #68 (01/2011) IV -42 <br />