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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 />21 <br /> <br />concrete arch culvert under the C&S Railroad. The addition of these pipes will have <br />a dramatic effect on the water surface elevations upstream of the rallroad and on <br />the Bruchez property. <br /> <br />The water surface elevation between the railroad and Wadsworth Parkway would be <br /> <br />5353.0. Just upstream of Wadsworth Parkway, the water surface elevation would <br /> <br />be 5356.0 due to backwater from the culvert under the street. A few hundred feet <br /> <br />upstream of Wadsworth Parkway the water surface prof11e begins to rise because <br />the slope of Big Dry Creek controls the depth of flow. These reductions In water <br /> <br />surface elevations due to the future Improvements w111 also remove the Bruchez <br /> <br />property from the floodplain. <br /> <br />~ <br /> <br />': ~ <br />( 11 t,. " <br />,I I,' , ;,/(7V2 <br />CONCUISiONS- I-! ') ,V,j",,-U../:; - <br /> <br />1. The Bruchez property Is located south of Big Dry Creek and west of Wadsworth <br /> <br />i)"~lA,J./) <br /> <br />Parkway. <br /> <br />2. The 1973 report of Wrlght-McLaughlln Engineers indicated that most of the <br />Bruchez property was outside the floodplain of Big Dry Creek. <br />3. The 1966 FHAD study of Greiner Engineering indicated that most of the Bruchez <br />property was within the floodplain of Big Dry Creek. <br />4. The 1973 and 1966 studies were conducted using different assumptions on two <br /> <br />Important points. <br />a. The depth, duration, and time distribution of rainfall used in the two studies <br />were based on the then current guidelines of the UD&FCD in effect at the time <br />the study was performed. <br />