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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />lOO-year frequency ~low, as defined herein, with an overflow <br /> <br />section capable of carrying potential excess over this amount, <br /> <br />Such overflow sections must be reasonably clean to allow water <br /> <br />flow without damage to the structure, The existing multiple box <br /> <br />culvert at Academy Boulevard and Cottonwood Creek is presently <br /> <br />too small and should be enlarged as noted in Appendix D, <br /> <br />Existing bridges, two in the upper <br /> <br />basin and two in the studied lower basin, which have foundation <br /> <br />erosion problems, should be repaired. Two proposed bridges should <br /> <br />be constructed to carry the design flow noted above. The locations <br /> <br />of these two proposed bridges are at Union Bouldvard and Cottonwood <br /> <br />Creek and at the new by-pass loop (Powers ?) at approximately <br /> <br />Point 6, <br /> <br />-28- <br />