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Hollows-CS 990402
'.: ~ :~.~ ~ - / ~.~ ,' ..- :,~, - ~ ~x ' .... ,,,. ¥.... -: · .' ...... ~ '" ..... . :':'Z ~ ~. . · '.-.~i-/~-~ . ~. ......... ~.. ~.~ ~ - .', .... '~.~ ,... .. .. ...... . ~%-'~ '.. ~. - '~ ~ ~ . ,. - ~/' ~"~ -'~ ~' '- ~ "'~ '/ ''~.~'~ ' I -,' · ... _":¢. - - =~ ~ ~-... ~ . ~ ~ ~ ".. -- ~80 -- 10,000 -- ~68 -- 8,000 EXAMPLE (5) - -- 1§6 -- 6,000 D-42 ~nches (3..5 feet} Q-120 cfs -- 144 -- 5,000 -- 120 - ~ [,000 (3) 2.2 7.7 --tO8 : ~ eD in feet - _ ~ - -- 96 -- 1,000 . ..... -~- _ -- 800 . - ' .... ~ - 84 600~ ~ --300 ~ ' : - - ~ ~ - ~.~ - ~.5 z ~ - ~ m_- - _ ~ ~ ~ ~ ~ _'..& - ~ ~ - ~oo .~. _ ~ ~ ~ 60 m .'" ~ 1.0 hO o~Z ~0 HW ENTRANCE 0 - ~ 40 D SCALE TYPE ~ -- hO - ~ ~ ~0 [I) Square edge wi~h ~ - ~ 20 (23 Greave ead ~ ~ - : (3) Groove end : projecting - - -- 27 - --tO - -- ~4 -- 8 -- .7 ' ~ 6 To use score (2) or [5) pro~ec~ - ~ ~ horlzontoily ~o scole ()),then ~ 4 use slrolghl inclined line through ~ ~ illustrated. --18 ~ hO ~. -~2 HEADWATER DEPTH FOR CONCRETE PIPE CULVERTS FHWA WITH INLET CONTROL NONO6RAPH I !~:.. 9R"/"~GE DIVISION HYDRAULIC ~ANUAL 12-85 .{ - ~_~