R2001-132 AUTHORIZING THE ADDITION OF THE ANNUAL ALLEY RESTORATION PROGRAM AND THE ANNUAL STREET BASE FAILURE REPAIRS

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w . COUNCIL COMMUNICATION FORM Engineering & Infrastructure Memorandum NO. 2001-41 July 09, 2001 TO: Honorable Mayor Howley and City Council FROM: Steve Garman, City Manager Stephen P. Swanson, P.E., Director of Engineering & Infrastructure Matthew C. Newell, P.E., City Engineer vr� William A. Ratekin, Assistant City Engineer SUBJECT: Annual Alley Restoration Program,Annual Street Base Failure Repairs Proposed Addition to City Project 2001-24 SUMMARY RECOMMENDATION: , It is recommended by staff that the City Council approve the attached resolution and extra work order authorizing the addition of two projects to the Annual Street Reconstruction Project. The projects are the Annual Alley Restoration Project and the Annual Street Base Failure Repair. These projects have a combined total amount of$114,985 and it is proposed that these be added, by change order, to the existing contract the City currently has with Dunn Company for the Annual Street Reconstruction Project. BACKGROUND: The Annual Alley Restoration Project is a new initiative proposed by the Department of Engineering and Infrastructure to improve the condition of alleys in the City. This year the project will mainly focus on restoring alleys that are currently paved and experience non residential traffic requiring a paved surface. The alleys that will be targeted by this project have deteriorated beyond the reach of normal maintenance. Depending upon the condition of the existing surface one of two restoration processes may be used. The first process generally ' consists of milling the existing surface along with a portion of the base to restore the road base. The second process would be to till or mix the existing surface into the base. Once this is completed the surface is graded and then compacted. In both processes the alley is then overlaid with 2 inches of asphalt. Additionally, in both processes, if it is determined that the existing base is inadequate, work will be performed to strengthen the base. The Annual Street Base Failure Repair project consists of full depth patching of various street sections that have failed. This work is normally done at isolated spots on roads that do not currently need major resurfacing. The objective of this project is to lengthen the life of a pavement by repairing areas of significant damage.