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<br /> :.• ;:,- Erosion CoetIol Coslouliez_.s OE 1.C..%1,e,,.. l_odt.,..„
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<br /> ALt subdi.vriiou roads sball ha seeded and 1:-A1ubcd accordi_nz-r, to
<br /> of Tr,ransion spacifications vo maintaiu the stalliliv:ation c
<br /> soule;ers :tad slopes/- .
<br /> Ali piue 411verts, storiA sewers and appurtenances shall be free of
<br /> eIL debris iuld .r.;i1t+. build-up aud shall ba structural !y and hydraulically souud
<br /> and 1' U:- iti. a letoLal nattnex- All drain:317,a d:i.t.Che:.; shall. be of such 1.75„dth
<br /> arte, e2.-11,--h and with sluch a slo pe as to carry the anticipated discharges_
<br /> Any se..coaLty road should have drainage established that is adequate
<br /> to 'I.:Ante-3n the road in a Pannar that is justifiable based upon the service
<br /> that inlc: xond
<br /> Conc,.ntrat:ed run of must be discharged at non-erosive velocities
<br /> onto undisturbr.d stEltble areas.
<br /> The grade of the side ditches should be such that the water is carri-d
<br /> rapidly to a good stiAble outlet. Aminimu= longitudinal grade of 0.57; is .
<br /> desirable to provide proper drainage longitudinally. A minimum transverse , •
<br /> shoulder: grade of 1/2, inch .per foot is expected to carry water of the shoulder
<br /> arca wha the shoullers arc not surfaced. Side ditches need not he very deep;
<br /> a depth of 2 or.3 feet below the crown of the roadways is sufficient and the
<br /> side.'..; .F.:110:Ad be givca a slope flat enough to prevent caving. *atehes should
<br /> have as great a grade as possible, they should be well cleaned out and have frec,
<br /> outlet.
<br /> The slope of the crown should be sufficient to carry the -water freely
<br /> and quickly to tha isjde ditch. ,
<br /> Tbe proper crown to use for earth, clay or gravel Toads is 1 indb
<br /> ler foot.
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<br /> ( rlit Sl.O p a 0:ad x ill of :o ad - .
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<br /> - The angle, for gradad slopes and fills Shall be no greater then the
<br /> FlOir! V1110.1> (:-9P ba 'iretainf.,-1 by vez.ntation cover.
<br /> The slope from the outside edge of the Shoulder to the bottoof: 'Cite
<br /> ditch sbauId. be 4 Illorizontal to 3 vertical. .
<br /> Slopes left e,x.posed wilt within 30 working days o completion of arty
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<br /> phase of grading be seeded .-.r otherwise provided With ground cover devices or
<br /> structures sufficidet to restrain erosion. .
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<br /> (C) St...abilization of. Shoulders e.--3 Slor--,.
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<br /> Prevent erosion an shoulders using seeding, sodding or -mulching. On
<br /> cut and f511 slopes, prevent rtlat off over ifitC1 face of the slopes by t1
<br /> tepr ,y divers:70 .
<br /> LI s, shoulder dikes or other m',..esures.
<br /> (D) D-s7.54n and Pe'rformence of Control ileasures.
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<br /> Erosion and Sedimentation Control measures shall be so plann=.d, desic,ar,
<br /> and constructed as to provide control of accelerated erosion and sedim-'.utatio, '
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