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• . ' <br /> " . <br /> - _ <br /> • "71, 'L 41: " : <br /> 04ii <br /> lice Control Guidelines for Private Poads'- <br /> • <br /> P.) _ <br /> Ali subdivlision roads shall be seeded and mulched according to <br />. Dapartmeet of Transp!ortation speciffeations to maintain the stnbilixation or <br /> shoulders and slope-I <br /> All pipe CT.Ilverts, storm sewers and appurtenances shall be free DE <br /> allI debris and silt build-up and shall be structurally and hydraulically sound <br /> sad fuact4oaiug in a!normal manner- All drainage ditches shell ba of such width <br /> and clap!'h and with sitch a slope as to carry the !anticipated discharges <br /> - <br /> Any secondary road should have drainage established that is adequate <br /> to maintain the road in a warmer that is justifiable based upon the service <br /> that the road reader- <br /> ConcentratOd run off must be discharged at non-erosive velocities <br /> onto undisturbed Stable areas. <br /> The grade pf the side ditches should be such that the water is carried <br /> rapidly to a good stable outlet. A isininun longitudinal, grade of 0.5% is <br /> desirable to orovidelproper drainage longitudinally. A minimum transverse <br /> shoulder grade of 1/2 inch per foot is expected to carry water off the shoulder <br /> area whoa the shooldrs are not surfaced. Side ditches used not he very deep; <br /> a depth of 2 or.3 feet below the crown of the roadways is sufficient and tha <br /> sides should be give e a slope flat enough to prevent caving_ Ditches shou/d, <br /> have as great a grade as possible, they should bevel' cleaned out end have freP. <br /> outlet. <br /> The slope pf the crown. should be sufficient to carry the water freely <br /> and quickly to the side ditch_ <br /> The propericrown to use for earth, clay or gravel roads is 1 inch <br /> or foot- <br /> 1 <br /> Criadnd Slope and fill of road • <br /> The angle for graded slopes and fills shall be no greater than the <br /> eagle 14.1ch nes bst retail:tea by vegetation cover. <br /> The slope from tha outside edge of the shoulder to the bottom of the <br /> ditch should ba 4 horisontal to 1. vertical. <br /> Slopes left exposed will within 30 working days of completion of any <br /> phase of grading be Seeded or otherwise provided With ground cover devices or <br /> structures sufficient to restrain erosion. <br /> (C) Stabilization of Shoulders ;!. -.4 Slopes <br /> Prevent erosion on shoulders using seeding, sodding or mulching. Oct <br /> cut and fill slopes, prevent run off over the face of the slopes by the use of <br /> temporary rtiversionsl shoulder dikes or other measures. <br /> (D) and PerfOrmance of Control Measures. <br /> Erosion and Sedimentation Control measures shall he so planu.d <br />