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4.03.[(3)(d)(v), the embankment will be constructed in uniform layers not exceeding in <br />thickness the approximate average size of the rock used, but [he layers will not exceed <br />36 inches, rock will be placed in a manner that will ensure proper pl ecement in the <br />embankment, so that voids, pockets, and bridging will be reduced to minimum. The final <br />layer of the embankment will meet the requirements of 4.03. 1(3)(d)(v). <br />Eaeh layer of the embankment will be completed, leveled, and compacted before the <br />succeeding layer is placed. Loads of material will be leveled as placed and kept smooth. <br />Embankment layers will be compacted as necessary to ensure that the embankment is <br />adequate to support the anticipated volume of traffic and weight and speed of vehicles to <br />be used for the duration of the road. In selecting the method to be used for placing <br />embankment material, consideration will be given in the design to such factors as the <br />foundation, geological structure, soils, type of construction and equipment to be used. <br />If necessary to ensure stability structural and foundation analysis will be performed to <br />establish design standards for embankment stability appropriate to the site. The degree <br />of compaction will be determined on the basis of soil type and the anticipated volume of <br />traff it end uei ght end speed of vehicles to be used for the duration of the road. No Litt <br />will be placed on a layer until the design density is achieved throughout the layer. <br />American Association of State Highway and Transportation Officials (AASHTO ), <br />specifications such as T-99, T-180, and the modified AASNTO test, 12th Edition, published <br />Juty, 1978 or other comparable specifications approved by the Division will be used es <br />guidelines for the determination of the maximum dry density for granular materials. <br />Material will be placed in an embankment only when its moisture content is within <br />acceptable levels to achieve design compaction. Embankment slopes will not be steeper <br />than 2h:1v, except where embankment material is a minimum 85 percent rock, slopes will <br />not be steeper than 1.35h:1v unless it has been demonstrated to the Division that the <br />minimum safety factor will be 1.25, or such higher factor as the Division may specify. A <br />loner safety factor may be approved if geotechnical analysis demonstrates that it will not <br />result in significant environmental harm or harm to the public health and safety, <br />Erosion Control. Temporary erosion control measures will be implemented during <br />embankment construction to m inimize sedimentation and erosion until permanent control <br />measures can be establfshed. Immediately upon completion, measures will be taken to <br />stabilize all embankments with vegetation cover or other means as approved by the Division • <br /> <br />to min~m~ze erosion. Where a vegetation cover is used, consideration will be given to <br />4 <br />