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<br />CONCLUSIONS <br />This paper has presented a procedure for determining water surface <br />profiles through bridge structures of various shapes and sizes, including <br />culverts under high fills. The procedure allows a continuous water sur- <br />face profile to be computed through bridge structures, over dams, and <br />through culverts for both subcritica1 and supercritical flows. The <br />procedure is a practical technique that has been developed during the <br />last three years while working with over 60 different offices (approxi- <br />mately 30 Corps of Engineers offices) throughout the United States and <br />Canada. <br />While reasonable answers have been produced for many unusual types <br />and shapes of bridges, few occasions have arisen where accurate high- <br />water marks and measured discharges were available to test the accurac:;y <br />of the procedures. <br />It is hoped tbat this paper will stimulate an interest in this <br />subject leading to research projects which will provide the necessary <br />field data to evaluate techniques that are suited to computer solution <br />of water surface profiles through bridges. <br />ACKNOWLEDGEMENT <br />The cooperation of ma.ny District offices of the Corps of Engineers, <br />several consulting engineering firms and State offices has enabled The <br />Hydrologic Engineering Center to develop and test this procedure. The <br />Gal.veston, Wilmington, Los Angeles and st. Paul District offices deserve <br />special recognition for their' contributions. <br /> <br />14 <br />