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<br />Statement <br />Number <br /> <br />Notes and Remarks <br /> <br />3301 <br /> <br />HV CHANGED MORE THAN HVINS. The differences between velocity <br />heads computed for the current and previous cross sections <br />exceeded the allowable specified by input as HVINS (or .5 feet <br />if HVINS . -1). <br /> <br />3370 <br /> <br />NORMAL BRIDGE, NRD = X, MIN ELTRD . y, MAX ELLC . Z.. The <br />normal bridge routine was used for this cross section. The <br />number of point used in describing the bridge deck are given <br />as X, the minimum top of roadway elevation is Y and the maxi- <br />mum low chord elevation is Z. <br /> <br />3377 <br /> <br />BLOSS READ IN. The diffenence in water surface elevation <br />between the previous and current cross section was given <br />by input data. <br /> <br />3420 <br /> <br />BRIDGE W.S. - X, BRIDGE VELOCITY. Y. The water surface <br />elevation under the bridge is specified by X and the velocity <br />through the bridge is Y. <br /> <br />3470 ENCROACHMENT STATIONS. X, Y. The left bank encroachment <br />station is specified by X and the right bank encroachment <br />station is specified by Y. Only the flow area between X <br />and Y is considered effective. <br /> <br />3495 OVERBANK AREA ASSUMED NONEFFECTIVE, XLBEL = X, RBEL =.Y. <br />The effective area option (IEARA) was used and the computed <br />water surface elevation was below at least one of the bank <br />elevations specified by X and Y and therefor.e this flow area <br />was assumed noneffective. <br /> <br />3685 20 TRIALS USED WSEL, CWSEL. The number of trials in balancing <br />the assumed and computed water surface elevations for the <br />normal step procedure of backwater has exceeded 20. Check <br />the assumed water elevation for reasonableness. <br /> <br />3693 PROBABLE MINIMUM SPECIFIC ENERGY. This note is similar to <br />7185 except it is not certain (only probable), that critical <br />depth has been crossed. It is known that no depth of flow <br />assumed in any of the trials produced an energy grade line <br />elevation as high as the minimum energy at critical depth. <br /> <br />3710 WSEL ASSUMED BASED ON MIN DIFF +.1. At the conclusion of 30 <br />trials the assumed water surface elevation will be made equal <br />to .1 of a foot above the elevation that came the closest to <br />balancing. This condition usually occurs near the top of <br />banks when IEARA = 10. Check results for reasonableness. <br /> <br />Exhibit 7 <br />Page 4 of 8 <br />