R2009-38 AUTHORIZING AGREEMENT HOMER L. CHASTAIN & ASSOCIATES, LLP

Home Browse Search

Engineering& Infrastructure Memorandum NO. 2009-20 DATE: March 30, 2009 TO: Honorable Mayor Carrigan and City Council FROM: Ryan P. McCrady, City Manager 1�� ] ��L�^�� Richard G. Marley, P.E., Director for Engineering& Infr strucfure � SUBJECT: Agreement with Homer L. Chastain &Associates, LLP, For Final Desi� of the MacArthur Road Bridge over Steven's Creek SUMMARY RECOMMENDATION: It is recommended by staffthat the City Council approve the attached Resolution authorizing an Agreement with Homer L. Chastain &Associates, LLP, (Chastain) for the final design of the MacArthur Road Bridge Over Stevens Creek, and the Mayor to sign and the City Clerk to attest. The expenditure for these services is not to exceed $98,971. BACKGROUND: Prior Council Action • August 2, 2004—Council approved Resolution R2004-115 authorizing an Agreement with Chastain to inspect five precast concrete deck bridges, including MacArthur/ Steven's Creek, for a fee not to exceed $7,965. • August 6, 2007—Council approved Resolution R2007-139 authorizing an Agreement with Chastain for engineering services to complete a preliminary design for a fee not to exceed $35,913. Background In 2004 The Illinois Department of Transportation notified governmental entities throughout the State that problems had been detected in precast deck beam bridges. These bridges are strengthened with cables that have been placed under tension within the beams in order to provide support for the structure. It had been found in other areas of the State that the tensioned cables within these bridges can deteriorate to the point of failure while showing few outwazd signs. At the time, IDOT advised an in-depth inspection of these bridges. Chastain's 2004 review indicated a need to replace the bridge deck at a future date. In April, 2007, staffrequested Chastain to update the structure review prior to a contract for design. The follow-up inspection by Chastain and the Illinois Department of Transportation(IDOT) indicated the need to replace the entire bridge(i.e. deck, superstructure, and substructure). Their structural review indicated that the bridge is safe at this time for normal traffic; however, a weight restriction has been placed on the bridge. Due to the critical nature of this bridge to the area residents for emergency vehicle access, school busses, etc., the City Council by previous Council action, determined that the bridge should be replaced Page � 1