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34.03 ROADS <br />i 4.03.2 Access Roads. <br />(4) (e) (ii) Culverts were placed using accepted engineer- <br />ing and construction practice. No problems <br />have resulted in culverts due to soil pres- <br />sure, passive resistance, or weight of vehi- <br />cles. <br />(iii) All drainage pipes and culverts have been con- <br />structed to avoid plugging, collapsing and <br />erosion at inlets and outlets. <br />(iv) Trash grates have been installed, when re- <br />quired at places within the drainage area <br />which could impair the drainage and sediment <br />control structures. <br />(v) Culverts have been installed for road surface <br />drainage in order to control erosion and ac- <br />comodate flows from intersecting drainage plan <br />patterns. Culvert locations may be found on <br />Map 8-1. <br />(A) (I) The short length of the waste <br />• storage access road, waste <br />storage access road, and Ponds <br />~/3 and ~P4 access road preclude <br />use of culverts. <br />(II) Plot applicable. <br />(III) Not applicable. <br />(IV) Spacing of culverts exceeds <br />200 feet on the existing mine <br />facilities access road. The <br />drainage ditches have been <br />constructed to handle the 10- <br />year, 24-hour precipitaCion <br />event without environmental <br />harm. See Surface Drainage <br />Appendix, Voli¢ne 8, for ditch <br />and culvert capacities. <br />(B) The mine facilities access road is an <br />existing structure and its drainage <br />properties have been proven through as <br />Revised 08/01/84 <br />. Revised 10/01/87 <br />21 <br />