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roadway is shown on Drawing 1. The existing roadway borrow area is to be left at a two percent <br />outslope, ripped and left in an extremely rough divot condition, and seeded. A supplemental <br />source of fill material is located approximately 500 feet upstream of Station 8+50, in the <br />drainage bottom. This borrow area is not to encroach upon slopes steeper than 1 vertical to 10 <br />horizontal, nor to be excavated below the existing valley floor more than four feet. Slopes are to <br />be left no steeper than lvertical to 10 horizontal. The remaining surface is to scarified, left in an <br />extremely rough divot condition, and seeded. <br />Foundation Preparation: All areas on which fill is to be placed are to be scarified to a depth of <br />six inches and recompacted (see compaction). All disturbed ground for the culvert bedding is to <br />be recompacted A bedding for the culvert is to be prepared on a compacted base (to include <br />any disturbed materials) to provide full support along a continuous 2% grade. All foundation <br />preparation for the culvert is to be observed by a Division of Minerals and Geology inspector. <br />Compaction: Materials are to be compacted at a moisture content of 10 to 14%, but not so wet <br />that shoving or heaving is experienced with the applicable compactive effort. Culvert bedding <br />and fill material placed within four feet of the culvert is to be hand compacted (air tamper or <br />walking roller) in lifts not to exceed four inches, with a minimum of three passes. Roadway fills <br />are to be placed in lifts not to exceed 6 inches in depth, and compacted with a minimum of four <br />passes of a "mass per foot width of a 1200 to 1500 pound" vibrating roller or equivalent. <br />Wearing Surface <br />The finished roadway wearing surface is to be a minimum of 6 inches of 2" minus crushed <br />angular durable rock or roadbase, compacted by a minimum of two passes of a roller with the <br />compactive effort described above. <br />Culvert <br />The culvert is to be a corrugated metal pipe, corrugations not less than 3-inch by 1-inch, and of <br />a minimum gauge of 12. <br />Riorao <br />Riprap is to be composed of durable rock with not more than 50% of the material under two feet <br />in diameter (D~ = 2 feet). Riprap is to be underlain by Merafi 140N or equivalent fabric, <br />overlapping edges not less than one foot (a fabric to prevent washout of fine soil particles but <br />allows passage of moisture). <br />Grout <br />All riprap less than 6 inches in diameter will have interstitial spaces grouted with concrete. All <br />concrete will be of a Portland cement type with a 30-day compressive strength of not less than <br />1500 pounds per square inch. Grout is to be a minimum of 4 inches thick, 1 foot thick at <br />junctures with the culvert and existing weir. All grouted areas, as well as riprap areas, are to be <br />underlain by Merafi 140N or equivalent fabric. <br />7 <br />