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<br /> May 15,2006 5 <br /> e CIP Discussion <br /> Civil Engineer Kris Giga provided the City Council with of an overview of the GoodPointe <br /> Technologies report. Ms. Giga also provided the City Council with an overview of the following <br /> street maintenance practices and procedures: <br /> Seal Coat-A seal coat is one of many types of surface treatment used in street maintenance. A <br /> seal coat is an application of asphalt emulsion followed immediately with an aggregate cover. <br /> Seal coat can waterproof the surface, provide low severity crack sealing, and restore surface <br /> friction. Seal coating can be performed at any time during the life of pavement and lasts an <br /> average of three to six years. <br /> The primary purpose of seal coating a street is to protect the street from deterioration caused by <br /> sun and water. A seal coat provides a waterproof membrane that keeps the pavement from <br /> becoming brittle and cracking. <br /> Mill and Overlay-There are several maintenance practices that involve milling. An edge mill <br /> typically consists of grinding the old bituminous surface along the outer eight feet of the strect. <br /> This helps establish a uniform cross-section, especially in instances where the crown in the street <br /> is relatively flat. A full width mill or resurfacing is necessary when the upper surface layer of a <br /> pavement has deteriorated considerably. <br /> e A full depth mill can be used on a street that has already been reconstructed with a good base <br /> section, but the pavement has deteriorated to a point where seal coating or a standard mill and <br /> overlay is not effective. A pavement section with significant cracking will end up reflecting <br /> through the new pavement. The full depth of the pavement is ground up and removed. This <br /> process may also involve some sub grade soil corrections and some removal of aggregate base, if <br /> it has been contaminated or is sub-standard. The street is paved with the same thickness of new <br /> asphalt. <br /> Reconstruction- When a street is fully reconstructed, the existing asphalt and base are completely <br /> removed and replaced. Reconstruction may also involve sub-grade soil corrections. For streets <br /> that do not meet current design standards for width, curb and gutter, and drainage, an upgrade <br /> may be necessary. <br /> Based upon the City's prevIOus five year capital improvement program, GoodPointe <br /> Technologies provided the City with four financial analyses using the following scenarios: <br /> Scenario I-The City would spend $1 million dollars per year on street improvements over the <br /> next twenty years. The existing five year CIP has been incorporated into the first five years of <br /> the model. Over the next twenty years, the average PCI would increase from 64 to 77. <br /> Scenario 2- The City would try to maintain a PCI rating of 64 and project the level of funding <br /> over the next twenty years to maintain this rating. The streets are selected by the program for <br /> , maintenance on an as needed basis. The results of this scenario indicate that approximately <br /> $14.5 million will need to be budgeted for pavement management over the next 20 years. <br /> ------.--- <br />