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• 8) 4% superelevation on curves <br />9) Compaction of all surfaces to 95% AASHTO T 180. Test results throughout the road <br />length will be submitted to the County demonstrating this compaction. <br />10) Inside road ditch in all cuts which will be at least 1.5 feet deep and 2:1 sideslopes <br />11) Maximum fill slope - 2.OH:1.OV <br />12) Maximum cut slope -1.5H:1.OV <br />13) Minimum horizontal curve - 200 feet radius. An existing curve immediately north of <br />the detour is less than 100 feet in radius. <br />14) All vertical curves have a sight distance of at least 140 feet except for the curve at <br />18+52 which is sharper due to the need to accommodate the crossing of the West Lateral <br />Ditch {pipeline). This grade cannot be changed for pipeline hydraulics. <br />• 15) Prior to chip seal, the road surtace will be treated with MC-70 or comparable product <br />16) As seen on the profile on Map 2.05.3(3)-9, the maximum grade of the route is 11.0% <br />in a length of 220 feet from station 28+80 to 31+00. This is the section where the road <br />descends toward Tuttle Draw. The County Engineer preferred the steeper grade in this <br />section over a shorter sight distance. <br />17) No sections of the roadway or fill are within the 100 year floodplain of Tuttle Draw. <br />18) Based upon the horizontal curves and superelevation of 4%, the recommended <br />speed of the detour road wilt be 25 miles per hour which is comparable to that of the existing <br />route. There will be no stop signs or passing lanes for the main route. The existing route has <br />straight road but does have a stop sign and a 90 degree turn. The detour length is 4550 feet <br />while the existing road to get to the same point is 4800 feet in length. <br />19) In areas where the road drainage must pass from one side to the other, 16"diameter <br />corrugated metal pipes will be placed at approximate 250 feet intervals below the roadway. <br />These installations will follow State Highway Department specifications. Culverts exiting on <br />• fill will be protected from erosion by use of riprap or other means. <br />(Revised July 2(106) 2.05.3(3)-45 <br />