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<br />13. The applicant shall request approval from the regulatory <br />~~ authorities for any roads that will not be reclaimed and for road <br />surfacing material that will not be removed and disposed of fol- <br />lowing cessation of mining operations. In addition, the appli- <br />cant should provide information showing that grading and blending <br />of road surfacing material with the surrounding material will not <br />adversely impact topsoil quality and revegetation success. <br />14. The applicant must review the proposed surface water control <br />^'~ y`~ plan and add additional ditches to control runoff from Phase IX <br />•~ as necessary. This information must be submitted before mining <br />Lv can begin in this area. <br />1-s:-Pvn.d._4 lust be redesigned to provide suff_ic,ien.t storage for <br />sediment, the 10 year,- . t~~r eve~d groundwater seepage as <br />refered-in the calculations in Append~i-x--@-o-t~the-pecm.it appli- <br />c~-t~i o n . <br />16. The applicant should obtain a water right to the volume of <br />n~ water to be permanently detained in the temporary impoundment. <br />~J\ Alternatively, the applicant can route the entire drainage from <br />y\ this impoundment through ditch E to North Fork. <br />17. All spillways must be provided erosion protection. Based on <br />"Design of Small Canal Structures", 12- inch riprap, 1.5-inch <br />` minimums on 6-inches of sand and gravel should be used. The <br />\_~\ applicant must use an accepted engineering methodology to design <br />and size erosion protection and all supporting details and calcu- <br />lations must be submitted to the regulatory authority. <br />1 8. D i t c h e Stk-~a.nd_~ea-s->= ,-~B,-and• E m u s t b e c h e c k e d f o r r e a c h e s <br />r~ where supercritical flow or hydraulic jumps occur and protection <br />~~/ should be provided at that point. z lfe(a;,~,~ <br />(~, 19. <br />' <br />' The. applicant must commit to monitoring drainages below <br />/) ditch A, B, C, and D outlets for erosion damage and repairing <br />same <br />~ within 30 days after such damage is identified. <br />-15- <br /> <br />