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BLANK , WESSELINK , COOK & ASSOCIATES , INC . <br /> . HARRY M.COOK <br /> . ROseei M.D� <br /> JOSEPH D.CYCOTfE <br /> A R C H 1 T E C T S <br /> E N G I N E E R S SCOTT D.RIGNTER <br /> BWC#009-0503 F/C 3.1 <br /> December 6, 2005 <br /> City of Decatur <br /> Doug Nooden <br /> Assistant City Engineer <br /> #1 Gary K. Anderson Plaza <br /> Decatur, IL 62523 <br /> RE: CITY OF DECATUR <br /> City Project#�-03 �`�-��7 <br /> GARFIELD AVENUE BRIDGE REHABILITATION <br /> Dear Mr. Nooden: <br /> This letter is written in response to our meeting on November 29, 2005 regarding the repair of <br /> the Ga�eld Avenue structure. <br /> As discussed, the configuration of the existing pier caps and bearings require the structure be <br /> temporarily supported on either side of the existing piers to be replaced. <br /> During the design process it became apparent the cost for installing and removing the <br /> temporary supports along with rebuilding the concrete corbel bearing system was becoming a <br /> significant portion of the cost of repairs. The cost for these items is estimated to be in the <br /> range of$475,000 to $525,000. <br /> Because of these costs, alternate methods of supporting the structure during repair and <br /> alternate bearing configurations were evaluated. <br /> Consideration was given to making the temporary supports permanent and removing the <br /> existing bearing support assembly and pier. The bridge girders would then be supported <br /> approximately 5 feet either side of the expansion joint. This system would provide substantial <br /> cost savings; however, supporting a bridge in this manner is somewhat unconventional and <br /> would require evaluation of the entire structure to be sure it would work. <br /> Consideration was then given to making the temporary supports permanent, however, <br /> providing additional structural steel framing between supports which would allow the bridge <br /> girders to be supported at the original bearing support locations (see Enclosure 1). This <br /> support method is estimated to cost in the range of$320,000 to $370,000, a savings of <br /> $105,000 to $155,000. <br /> 2623 EAST PERSHING ROAD • P. O. BOX 2910 • DECATUR, IL 62 524-2 97 0 <br /> PHONE: 217/428-0973 • FAx: 217/428-8934 • www.bwcinc.com <br /> � <br />