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<br />. <br />. <br />I <br />I <br />. <br />I <br />I <br />. <br />I <br />II <br /> <br />I <br />;. <br />. <br />I <br />. <br />I <br />I <br />I <br />I <br /> <br />20 <br /> <br />ADDITIONAL HEC-2 RUNS <br />, <br /> <br />Additional runs were made of the HEC-2 model using the peak discharge rates and <br /> <br /> <br />elevations determined from the HEC-I runs using the improved inlet and/or the <br /> <br /> <br />storage avallable upstream of the rallroad culvert. This was done to determine the <br /> <br /> <br />effects of these reduced discharges and elevations on the water surface proflles on <br /> <br /> <br />the Bruchez property. <br /> <br />These results Indicate that for all of the combinations of storage, with and without <br /> <br /> <br />the Improved Inlet, the reduction In elevation is such that most of the Bruchez pro- <br /> <br /> <br />perty Is removed from the floodplain. The revised water surface proflle and flood- <br /> <br /> <br />plain based on the results of this study, uslng.2D.lY the temporary storage within the <br /> <br /> <br />f100dway and no Improvements to the Inlet to the rallroad culvert, are shown on the <br /> <br /> <br />drawings at the back of this report. <br /> <br />The HEC-2 runs Indicate that the effects of the improved inlet do not extend <br />upstream of Wadsworth Parkway when the effects of storage are also included; <br />therefore, there Is no need to make the improvements to the rall road culvert. <br /> <br />MASTER PLAN IMPROVEMENTS <br />Just before the conclusion of this study, another piece of Information was brought <br />to our attention by Kevin Stewart of the UD&FCD. They had just received the pro- <br />posed Master Plan for Big Dry Creek. <br /> <br />This plan proposes adding four 12o-Inch reinforced concrete pipes to the existing <br />