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During stripping and benching, the foundation surface and local <br />topography will be exposed for the first time. Surveying during <br />construction vrill reveal the actual local slopes and drainages. <br />Detailed geologic information will become available. After reviewing <br />this information, the construction engineer will finalize the road <br />alignment. It may be necessary to vary the width and alignment of <br />the road to avoid minor curves or excessive fill slopes. The road <br />alignment may be moved into the existing slope in places, producing a <br />larger cut but a smaller fill. The location of cross culverts may be <br />adjusted to take advantage of natural drainage patterns, thereby, <br />reducing the erosion potential. <br />The design calls for the entire haul road fill to be constructed <br />of granular cohesionless materials. There is no adequate method to <br />quantitatively specify the required density for these materials. <br />Performance type specifications are therefore commonly used. <br />The embankment fill material will be reasonably free of all orga- <br />nic material, frozen material, coal and other deleterious substances. <br />This fill material will be placed in lifts not exceeding 12 inches <br />loose thickness. The lifts v+ill be placed by blading or dozing. <br />Compaction of the fill will be achieved by successive passes of the <br />spreading and hauling equipment. During spreading the surface <br />materials will be kept thoroughly moist to promote compaction to the <br />maximum density. i~o fine-grained or cohesive materials v+ill be placed <br />in the embankment. <br />The haul road surface will consist of a 12-inch thick layer of <br />durable rock placed on the embankment fill material. The haul road <br />will be maintained to promote safe and efficient utilization. The <br />road surface will be bladed and repaired as required to maintain a <br />safe smooth surface. Cut and fill slopes will be inspected regularly <br />to check for signs of instability. Repair v+ork will be done as re- <br />quired. Dust control measures will be instituted as necessary. <br />Haul Road Drainage <br />All haul roads include surface drainage and control. These <br />measures include: <br />1) Drainage ditches on the up-slope side. <br />2) Cross-culverts at intervals along the roads. <br />3) Culverts at locations where the haul roads cross established <br />drainage channels, diversion and collection ditches. <br />Ditches v+ere constructed alongside the haul roads to carry runoff <br />water. Strav+ dikes and/or ditch checks v+ill be placed intermittently <br />within these ditches. l•lhen necessary, cross-drains v+ere installed <br />to transfer vrater to the side of the road where ditches v+ith adequate <br />sediment control could be constructed. Also, ditch relief drains <br />were installed to direct vrater into Grassy Creek as often as possible. <br />i <br />2-85 III-12 <br />