R2011-80 AUTHORIZING AN AGREEMENT WITH THE STATE

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Public Works Memorandum NO. 2011-34 DATE: May 27, 2011 TO: Honorable Mayor McElroy and City Council FROM: Ryan P. McCrady, City Manager Richard G. Marley, P. E., Director of Public Works SUBJECT: Agreement with IDOT for Storm Sewer Disconnection on Rt 51 SUMMARY RECOMMENDATION: It is recommended that the City Council adopt the attached Resolutions authorizing the Mayor to sign and the City Clerk to attest to the following items related to the disconnection of storm sewers from a sanitary sewer: 1. A Resolution authorizing an agreement with the State of Illinois for the repairs to disconnect storm sewers from a sanitary sewer. 2. A Resolution authoring the Mayor to approve Change Order#2 to the contract with Barr& Robison Sewer& Excavating, Inc., extending the contract completion date to September 1, 2011 in order to construct the improvements authorized by the Agreement with IDOT. BACKGROUND: In March, 2011, the Sanitary District of Decatur(SDD)notified the City of Decatur that they discovered 2 inlets on northbound State Route 51,just south of the bridge over Lake Decatur, had been connected to a Sanitary District of Decatur manhole. Due to the amount of stormwater that can enter the sanitary sewer from these inlets and the City's efforts to remove inflow and infiltration from the sanitary sewers, it is prudent to remove the stormwater from the sanitary sewer as quickly as possible. On April 26, 2011, City Staff met with representatives from the Illinois Department of Transportation (IDOT) and SDD. The following options were suggested: 1. IDOT to include the disconnection as part of a future IDOT project, possibly in 2015. 2. IDOT to prepare plans and bid the work as a separate project, probably in 2012. 3. IDOT day labor to perform the work sometime in 2012. 4. City to use a contractor currently under contract to do the work and be reimbursed by IDOT. At the time of the meeting with IDOT, Barr& Robison held the contract for City Project 10-09, Miscellaneous Storm and Sanitary Sewer Improvements Project. An estimate to complete the work was prepared by Barr&Robison. IDOT reviewed the estimate and would like to proceed with this option. Page 11