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<br />Joove mouth for a STream Of waTer flow;nq in an OOOn Channel. <br />It is generally drawn to Show surface elevation for the crost of <br />a spociflc flood, but ~y be prepared for conditions at a glvan <br />ti....orstago. <br /> <br />01 occurrenCe In the ordflr of onco in If), 50, l')tJ, or ~Xl y",arc" <br />respectively. The flood may occur in My ve'lr, It is based on <br />sfatl"tical analyses 01 ,>trear1llow records and <lnalysHsof r;,i n- <br />fall and runOf'ch<vacteristics intrO<lenoral rO<l;onnf the <br />.'l3torshed. <br /> <br />f~Staqe <br />Tho staqe or elevation at which overflow of tho natural <br />banks of a stream or ~y of water begins in the reach or erea <br />in which the elevation Is measured. <br /> <br />Topofl1'atorwav <br />This is the roof of th(jopeninq Inastroamcrossing <br />through which water Ilows under normal conditions. Iti'the <br />underside 01 tho dock 5pan ~ sometimes ca lied" low "te!'!I", the <br />roof 01 a box culvert, or the crOWn 01 an arched or circular cul- <br />vert. <br /> <br />Head Loss <br /> <br />The effect of obstructions, such as narrow bridgo OD~n~ <br />ings or bui Idi n~s, that I im!t th", ~rea t~rough which water must <br />flow, ralsin~ the surface of the water urstream trom the obstruc- <br />tion. <br /> <br />Left Bank <br /> <br />The bank on t~e left side of a river, streaM, or water <br />course lookinq downstroam. <br /> <br />RoferoncePolnt <br />^ numbered point Identifylnq a specific locntion used <br />/or correl,,-r-inC)-r-he data shown InvarTousformsthrouqhoutthe <br />report. <br /> <br />Rinht Flank <br /> <br />ih.. bank nn the riq~t sioe or " rlvOr, stream, or wa-rer <br />COurSe lookinqoownstrA,.m. <br /> <br />.10-, ~O~, I OO~. and 500~Yenr flood <br />A flood hnvlng" 10, 2, I,or .2percentprobahilitv, <br />respectively, of occurrenCe in any vanr or an ~vorago frequency <br /> <br />" <br /> <br />'" <br />