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<br />-cont. - <br /> <br />Curve Number <br /> <br />2 <br /> <br />Descri pH on <br /> <br />Top of roadway elevations as specified on the . <br />"BT" cards. <br /> <br />3 <br /> <br />The low chord elevations corresponding to the <br />top of roadway on "BT" cards. <br /> <br />4 <br /> <br />Channel improvement trapezoid specified on the <br />"CI" card. <br /> <br />5 <br /> <br />Left bank station and elevation from "Xl" card. <br /> <br />6 <br /> <br />Right bank station and elevation from "Xl" card. <br /> <br />7 <br /> <br />Trapezoidal approximation of the special bridge <br />representation of the bridge opening for low <br />flow computation from the "SB" card. <br /> <br />8 <br /> <br />Horizontal line indicating the threshold <br />elevation for weir flow based on variable "ELTRO' <br />(X2.5). If variable "ROLEN" (SB.4) is specified. <br />the line for curve 8 is "ROLEN" long. <br /> <br />9 <br /> <br />Horizontal line indicating threshold elevation <br />between low and pressure flow as indicated by <br />variable "ELLC" (X2.4). <br /> <br />10 <br /> <br />Horizontal line indicating elevation of sedi- <br />melltation based on variable "ELSED" (X3.2). <br /> <br />1] <br /> <br />Left encroach_nts from variables "ENCFP", or <br />"STENCL", or "ELENCL" (X3.3,or X3.4, or X3.5), <br />or methods one and two from "ET" card. <br /> <br />. <br /> <br />28 <br />