R2010-232 AUTHORIZING SUPPLEMENT #1 TO AGREEMENT WITH URS CORPORATION

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have now been increased to 6 month intervals. Since the damaged beams are not in the wheel path, the bridge is safe for normal traffic; however, the bridge needs to be replaced in the near term before the damage progresses and more strict traffic restrictions are imposed. $1.04 million in Federal Surface Transportation Program—Urban (STU) funding is currently allocated to fund a portion of the bridge replacement cost. Current preliminary estimates place the bridge and roadway replacement cost approaching $2 million and the cost to raise the Sanitary District interceptor at $550,000. Additional STU funding is being requested and the District has indicated a willingness to cover the interceptor costs. A public meeting was held on Apri128, 2010, to present the preliminary design and receive public input. Area residents voiced concern regarding the limited clearance for boats under the bridge and requested that the bridge be raised to provide more clearance. The City Council, in a study session held on September 20, 2010, recommended that the City look at options to raise the bridge. The proposed agreement with URS is a supplement to the original preliminary design services work completed earlier in the year. The supplemental work to increase the bridge clearance includes: 1. Perform additional survey work necessary to increase the structure height. 2. Evaluate the changes in the structure and approach roadways to accommodate the proposed height change. 3. Evaluate the impacts of raising the area sewers, including the Sanitary District interceptor to accommodate the proposed height change (much of this work will be reimbursed by the Sanitary District). 4. Conduct a public meeting to discuss the proposal to raising the bridge. 5. Perform IDOT mandated bridge inspections at 6 month intervals until the bridge is replaced in 2012. The Sanitary District of Decatur maintains a 30" sanitary sewer interceptor which currently rests on the bridge abutments. The interceptor must be raised at the same time as the bridge structure in order to provide the recommended clearance. The District has agreed to reimburse the City for the costs associated with the design and construction required to accommodate the interceptor. The interceptor related costs are $16,300. The expenditure for Supplement#1 is not to exceed $57,200 which is'added to the original $77,500 preliminary design agreement cost for a total contract amount of$134,700. The Sanitary District has agreed to reimburse preliminary design costs up to $16,300 related to raising the District interceptor. POTENTIAL OBJECTION: There are no known objections to this resolution. INPUT FROM OTHER SOURCES: URS Corporation, Sanitary District of Decatur ' STAFF REFERENCE: Richard G. Marley, Public Works Director, Matthew C. Newell; City Engineer. Richard Marley will be in attendance at the City Council meeting to answer any questions of the Council on this item. Page � 2