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The haul road follows the alignment of an existing ranch road. The existing road was <br />widened and adjacent slopes were laid back at the same angle as original slopes. The <br />horizontal alignment and profile of the haul road is shown on the Haul and Light Use <br />Road Map, (Map 19). Overall haul road grade is 7.8%. Maximum grade is 12.5%. <br />The horizontal alignment of the haul road follows the contour of the existing hillside. <br />Road cuts for the haul road range from 3 - 20 feet in height with average slopes of <br />1 H:1 V with a small section as steep as 0.2H:1 V. The road is approximately 30 feet <br />wide to provide for two-way traffic with a 30 inch berm along the outside edge. The <br />crown and slopes on the haul road are designed so that all surface runoff is routed to <br />the haul road ditch on the north side of the road. The configuration of the haul road <br />is illustrated by Figure 23, Typical Haul Road Cross-Section. <br />Existing haul road cut slopes are the same as the original road side slopes. In 15 years <br />of operation, there has been no evidence of cut slope instability and none is <br />anticipated. <br />Drainage <br />Haul road design, construction, and maintenance practices will result in effective <br />control of drainage from the haul road. Direct precipitation on the haul road surface <br />will not result in any significant erosion, siltation, or adverse impacts on the hydrologic <br />balance. <br />Runoff from the lower section of the haul road is collected and routed to Sedimentation <br />Pond No. 5 by the access road collection ditch. This ditch is composed of two <br />segments, as shown on the Drainage and Sediment Control Map, (Map 20). Section <br />A runs almost the entire length of the lower road along the north side of the road and <br />collects most of the runoff from the road surface. Section B is significantly shorter and <br />runs along the west edge of the road adjacent to the facilities area. Runoff from the <br />• upper portion of the haul road is routed to Pond No.4 by the south refuse collection <br />ditch. <br />o;%";;~~ 4.03-3 Revised -January 1996 <br />