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03/13/2017 City Council Agenda
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03/13/2017 City Council Agenda
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3/13/2017
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3/13/2017
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Concrete Improved Street System <br />Of the 543 centerline miles of streets 30 centerline miles (81 lane miles) are concrete. In 2015 <br />staff were able to refine concrete street inventory data so condition inspections could be <br />completed. Unlike asphalt streets, concrete streets require panel counts plus an average width <br />and length of the panel for the calculation of PCIs. Concrete segments are best evaluated when <br />defined as a city block. Historical concrete designs for typical city blocks contained 66 panels, 3 <br />columns of panels within a block length, or 33 panels with 2 columns. <br />Concrete streets like bike paths are built for a life of 50 or more years until complete <br />reconstruction. Deterioration of concrete streets occur within individual panels with many panels <br />in a street not requiring repair. Due to these unique factors for concrete streets, analyses which <br />predict future needs of this system tend to be less accurate then asphalt surfaces. However like <br />unimproved streets and bike paths we can provide a current condition of this system. <br />Past repair for these streets were primarily provided by City maintenance crews which consisted <br />of panel replacements for the worst deteriorated panels. Historical construction data indicate that <br />60% of concrete streets are over 70 years in age. Based on past maintenance repairs these streets <br />over time may have had a majority of panels replaced. <br />With the gas tax and bonds the City has contracted several concrete projects during this funding <br />period. Approximately 2 miles or 7 lane miles have been repaired, this includes reconstructing <br />asphalt intersections to a concrete surface for their durability to handle heavy traffic. <br />% Condr rflon of Concrete ystem by Fu!ncdonall Class 2016 <br />Failed Serious Very Poor Poor Fair SaLisfacLory Good <br />22 <br />11111111111 C ollecLors <br />
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