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Mr. William Eisenman <br />WRC File: 1624/10 <br />Page Two <br />50 bridge, the water surface drops sharply through the bridge. At <br />section, an increase of 1.0 foot (Section compared to the F t <br />FEMA study was <br />noted. WRC considers this difference to be due to the more dear ailed analysis <br />by WRC and not necessarily due to any impact of the realignment. This <br />conclusion is supported by the fact that very little difference in the flood <br />elevation was calculated upstream-and downstream of the bridge. The .water <br />surface and energy gradeline profiles are presented on Figure 2. The listing <br />of the input .and output for the computer runs is also enclosed (Appendices A <br />and B). <br />The conclusion of the analysis is that the proposed river realignment. <br />plan will not have significant impacts on the 100 -year floodplain and the <br />flood profile that was developed by FEMA. <br />If you have any. questions, please do not hesitate to contact us. Thank <br />you for the opportunity to be of service. <br />encl: Table, Figures, Appendices A and B <br />. cc: B. Grimes, w /enclosures <br />B. Cramb, w /enclosures <br />Respectfully submitted, <br />WRC ENGINEERING, <br />,; ,zg* <br />William P. Ruzzo, <br />Vice President <br />