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Zach Tru'illo _ - 3 - June 15 2012 <br />8. DRMS: During the Division's May 1, 2012 inspection, it was observed that access <br />roads may be needed to perform maintenance on ditch D49 and ditches along the <br />western end of the proposed West DWDA. Please add access roads or provide <br />an explanation as to why roads will not be needed to perform maintenance on <br />these ditches. <br />NECC: A light use road has been added to provide access to the western end of the <br />DWDA, please see revised Map -12. <br />9. DRMS: The proposed roads on Map 14 in TR -65 require clarification. In <br />particular, the roads needed to build the proposed DWDA and the Soil Storage <br />Stockpile may have to be altered from the submitted map. It is unclear how these <br />features will be constructed. <br />NECC: The road up to the fan will be changed to a haul road designation to allow for <br />better access to the DWDA for construction. Please see revised Map -12. In addition, a <br />light use road will be added between the soil stockpile and containment area no. 2 in <br />order to provide access to the western end of the DWDA. Two access roads will be <br />used to build the subsoil piles. <br />10. DRMS: Please connect ditch D28 to ditch D31 or explain why ditch D28 flows <br />to Containment #1, where it is co- mingled with runoff from disturbed areas. Perhaps <br />ditch D28 should be connected to ditch D34b. <br />NECC: The flow path of D28 prior to the submittal of TR -65 was for the runoff to be <br />passed through containment area No. 1 and therefore, the flow path was left <br />unchanged. However, a culvert directing flow to D31 is a logical point of discharge to <br />the river of the undisturbed runoff. Therefore, please see new culvert 23 location on <br />Map -14. The flow used to size the culvert is based on the peak flow of D28 which is <br />18.27 cfs, therefore, a 30" culvert will be required as previously specified. <br />Culvert 23 was previously used under the access road to the soil stockpile area. Since <br />the configuration has changed, C23 is no longer needed so the culvert name will be re- <br />used for the purposes described above. <br />11. DRMS: There appear to be errors on Map 14 West Portal Sediment and Surface <br />Water Control Plan regarding ditches D34a and D34b. Should these ditches be <br />extended west to the road intersections north of the West Portal Fan? Please <br />provide an updated map correcting these ditches or an explanation regarding <br />their locations and why ditch D34b would connect to ditch D52. <br />NECC: Please see revised Map -14. <br />