05/29/19 City Council Agenda Packet - Work Session

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Concrete Improved Street System Of the 555 centerline miles of streets 36 centerline miles (89 lane miles) are concrete. In 2015 staff were able to refine concrete street inventory data so condition inspections could be completed. Unlike asphalt streets, concrete streets require panel counts plus an average width and length of the panel for the calculation of PCIs. Concrete sections are best evaluated when defined as a city block. Historical concrete designs for typical city blocks contained 66 panels, three columns of panels within a block length,or 33 panels with twocolumns. Concrete streets,like bike paths,are built for alife of 50 or more years before requiring complete reconstruction. Deterioration of concrete streets occurs within individual panels with many panels not requiring repair. Due to these unique factors for concrete streets, analyses which predict future needs of this system tend to be less accurate than asphalt surfaces. However,like unimproved streets and bike paths,we can provide a current condition of this system. Past repair of these streets wasprovided primarily by City maintenance crews which consisted of panel replacements for the most deteriorated panels. Historical construction data indicates that 60 percent of concrete streets in Eugene are over 70 years in age. Based on past maintenance repairs these streets over time may have had a majority of panels replaced. By the end of the 2017 Bond Measure (2023), approximately 17 lane miles (six centerline miles) of concrete streets will have been rehabilitated from past and current funding sources. Through the new bond measure,an estimated $5 million will be spent on approximately seven lane miles of concrete streets. % of Concrete System by Functional Class 25.00 20.00 15.00 Arterials Collectors Locals 10.00 5.00 0.00 FailedSeriousVery PoorPoorFairSatisfactoryGood Figure 8 Percentage of Concrete System by Functional Class 19 May 29, 2019, Work Session - Item B