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i <br />i?` <br /> <br /> <br /> I80 10,000 <br />(I <br />) <br /> ' ; <br />000 LOSS COEFFICIENT Ke <br />8 <br /> )6e , <br />~ FOR VARIOUS ENTRANCE . <br />(2) <br /> 156 6,OO <br />0 ~ TYPES 6' <br /> P <br />5,00 (3? <br /> '- 144 4,000 ~/ EMRANCE 5. 6• <br />COEFFICIENT <br />SCALE <br /> TYPE <br />D <br /> - 132 3,000 5.' 6• <br /> (1) Heodwall, sq. edge; or End 0.5 <br />~ <br /> -120 m Section conforminfl to fill. 5. <br /> o 2,000 <br />slope 4. <br /> d (]) Mitered to ron(orm Io slope 0.7 <br />~ <br />~ ~ <br /> - IOB o ~ q) Projecting from fill 0.9 3. 4. <br /> <br /> 96 ~ 1,000 3• _ <br /> N 800 - <br />To use stole fD or (]) project 3' <br /> 89 600 horizonlolly m smle (U, then <br />2 - <br /> me srmighl in<fined line thmvgh • <br /> 500 D and O wales, or «v<rse as <br /> 400 - illustrated. <br /> 72 2' <br /> 700 0 <br /> \ 1.5 <br /> w - _ <br /> <br />_c <br />60 U 200 x <br />i-5 <br />I.5 <br /> c ~ `u <br /> <br />~ 59 <br />~ `v <br /> 100 p <br /> v 0 w 80 ~ <br /> <br />p <br />V ~ <br />- ~ <br />v c <br />`x4MpLC <br />60 ~ <br />c <br /> <br />0 <br /> ~ - 1. 1.0 <br /> 0 42 ~ v <br /> ` O <br />40 EXAMPLE 1.0 <br />w ., <br />E 36 30 DIam. ID)=d8 .n. ~t lt, o <br />0 0970 c1s ~ ,g <br /> 3 _ - . _ _ _ _ _ . - . _ U <br />20 v <br />8 <br />B <br /> Scale HW HW = <br /> 30 O• 6 <br />v <br />~+ fU 1.0 d.0 fl, <br />N 27 10 121 1.0 4.0 <br />m 9 (3) 1.1 d.d '7 .7 <br />0 <br />m 29 .7 <br />~ 6 <br />O 5 <br />~ 21 4 6 <br /> . .6 <br />0 <br />v 3 .6 <br />c <br />0 IB <br />~ 2 <br /> 15 S <br /> L0 .5 <br /> HEADWATER DEPTH FOR <br />- 12 CORRUGATED S7EEL PIPE CULVER TS <br /> WITH INLET CONTROL <br />_V ~ ~ ~ I - <br />Fig. 4-18. Inlet control Homograph for corrugated steel pipe culverts. The manufac- <br />turers recommend keeping HW/D to a maximum of 1-5 and preferably to no more <br />than 1.0. <br />