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JULY 1, 1963 DRAINAG)F MANUAL TAG. A 5-294.222 <br />COEFFICIENT Or RUNOFF - <br />(for use with rational formula). <br />-- -- <br />-RWIO SE <br />D VA LUES <br />SURFACES <br />N. <br />MAX. <br />0.90 <br />0.90 <br />1.00 <br />1.00 <br />ROOFS A;I Kinds <br />Portland Cement Jr AS;1131 rt Cone• 2te <br />PAVEMENTS E3itu.T tou•, open g#adf' or c►: eked <br />0.70 <br />0.90 <br />Gravcl, ! om clean end !.lose Ir.,el; ycy and hard. <br />0.25 <br />0.70 <br />R.R. YARDS <br />0.10 <br />0.30 <br />SAND, from uniform Train <br />[fare <br />0.15 <br />0.50 <br />size, no fines, to yell <br />Light VenPtation <br />0.10 <br />0.40 <br />graded, some silt and clay. <br />Dense VqS� atio <br />0 OS <br />030 <br />LOAM, from sandy or <br />l [isre . <br />0.20 <br />0.60 <br />gravelly to clayey. <br />Light Vegelatiort <br />0.10 <br />0.45 <br />EARTH <br />SURFACES <br />-I <br />_P_ se <br />0.05 <br />CRAVE L, From clean, no _ <br />f`1ce <br />0.25 <br />0.65 <br />silt Cr clay, to hick LtfihLYeseLl wL <br />I <br />0.15 <br />0.50 <br />_ j_,_;�claLcorfrr?t,__ rnsaVerrtation <br />0.10 <br />0.40 <br />CLA , frcm coirsca s ndy j C..,1e <br />0.30 <br />0.75 <br />or ;,t ,, to pure col- i !.:; �_Venr_atiorl <br />Dcn_se_Vertetation <br />0.20 <br />0.15 <br />0.60 <br />0.50 <br />ICity, uwmess area•. <br />10.60 <br />0.75 <br />COMPOSITE <br />City, r'en�e res,den,.al, I <br />vary as to sciI ood <br />0.35 <br />0.65 <br />AREAS <br />vcc:cratie-1. <br />Suburb..n residential, I <br />! <br />0.20 <br />0.55 <br />vary as to soil , �io <br />ve(IMATion <br />Highway s'.opes and ditchns, <br />vary as to soil and sloe?. <br />0.20 i <br />0.07 <br />Parks, Golf Courses <br />0.10 <br />0.35 <br />etc., vzry as to s011 <br />----_._� <br />__ Anil er•gc'et,tn. ___-__ I - <br />I <br />� <br />Note: Values of "C" for cIrt!, ,uff.ices are further ririce by dCUrer of saturation, compaction, surface irreyular,ty <br />and slope, character of suf:.o,l and by the i»atence e! Irt•,t ar glazed now or ice. <br />