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<br />Exhibit D <br /> <br />J <br /> <br /> <br />, P\ p' <br />. {"".~.l .. ,I <br />I' ~-erins. Envkoameafa " - > <br />and Program ~eat Servic:es <br />5898 South Raw SlIM . l.itdetcn. co 80120 <br />Phone 303.797.1200 . Fax 303.797.1187 <br />L F. ShTO AND ASSCCIATfS www.irsalo.com <br /> <br />September 17, 2003 <br /> <br />0375 <br /> <br />Mr. Gregg Barrie, landscape Architect <br />Town of Vail <br />Dept. of Public Worksl Transportation <br />1309 Elkhom Drive <br />Vail, CO 81657 <br /> <br />Re: Floodplain Study <br />Plrateship Park Bridge Replacement <br /> <br />Dear Gregg: <br /> <br />The existing bridge floodplain analysis has been completed for the above referenced project as we have <br />discussed. As suspected, the analysis indicates that Induslon of the pedestrian bridge to the existing 1999 <br />floodplain study currently under the FEMA 90-day appeal process does not create a condition where flow is <br />over-topping the structure. In fact, results indicate that the base flood elevation (BFE) is over two feet <br />below the lowest portion of the bridge structure and that all flow is contained within the channel of West Mill <br />Creek. <br /> <br />Our office has reviewed the drawings received from your office on September 16, 2003 for the proposed <br />replacement bridge and west abutment and compared the proposed design to survey data of the existing <br />bridge, abutments and channel of West Mill Creek. Given this Information, we believe that the proposed <br />bridge improvements will meet the requirements of Town of Vail Code 12-21-10 E, ....that the work will not <br />adversely affect adjacent properties, or increase the quantity or velocity of flood waters." This condusion <br />has been reached based upon the assumption that the channel of West Mill Creek will remain essentially <br />unchanged from existing to proposed conditions. We recommend that an as-built survey be completed <br />following construction of the replacement bridge and associated abutment and the results evaluated for <br />compliance with the above stated Town Code. <br /> <br />~ <br /> <br />We appreciate the opportunity to provide engineering services to the Town of Vail for this project and look <br />forward to working with you again. Please let me know if any further assistance or additional information is <br />needed. t'"......,'. <br />,'~~'~,,'\\ REG,ljt###! <br />~ ':!.~ ~..~. ~.." <br />~ ~ ..~ ". 110;.... ~" <br />~" ..~"7 'r~.. "<" ~ <br />i 10 ~\: <br />:1-('~ 35054 ~11} 5 <br />. .. <br />. .. <br />~ -;. 9/17# J/~ i <br />,,~~. :S ~ <br />...~.t ~v~~ <br />"####~'ltltl l"':~~~~ <br />Ross Horvath, P.E. ..........,... <br />Water Resources Project Manager <br /> <br />Sincerely, <br /> <br /> <br />File: 0375 <br />