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~---- <br />-- ' 136 <br />;r-- ~--~+ 3/16" veal hole <br />:' ~ ~± <br />i ~ <br />~ , <br />i ' <br />~ ~ <br />i ' <br />PVC ' <br />2^ FSPe ~{~ ~ <br />S ficr 1•yM ' <br /> <br />~S}r to..n ~~ <br />.~ <br />A <br />I 2" ~ <br />$eai! <br />l~l .++~: .I~ <br />2 1" PVC c:,p; <br />I ~/" " x IY: ~~ X ~ Feef St<>,y64 P."e Bo., <br />~C ~cc>' FCnc< ~ST ~^l.e <br />3/4" x 1}" ~ , <br />measuring stick , i <br />~P.ne~ <br />4 c. <br />t~ <br />' , I ~+. <br />Be <br />Perforated ti <br />for regrmula <br />cork <br />(G.:..J C.rk :. <br />,~ <br />PN ...,. <br />FIGURE 2.~3 -Typical crest gage installation at a highway bridge with detailed drawing. <br />~~~{'eS~.:oa{a/t,~~79~FisLl Mawas~ f.. Resegrc6 i.t{1~~:erltaral Hf.I.slayy~A~r;erltrrq~ Ngw~6sakw,22I <br /> <br />n <br />n <br />t.~..~ <br />Tyyk 1. , <br />ar( <br />~PV <br />n cup •. \\v( <br />fed \v/ <br />8lrsae.~ U <br />Note.--Set 8-pen m11 at <br />top of 3/4" x 1~" meaeur- <br />ing stick for flush flt <br />with cap. <br />Section A-A <br />f w <br />~" intake <br />colas <br />U. S. GEOLOGICAL SURVEY <br />CREST-STAGE GAGE <br />