2D, Street Infrastructure Discussion

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mean that in 20 or 25 years that street will need to be totally rebuilt. How long should the - concrete curb and gutter last? Concrete should easily last 50 years and beyond. If when a street is rebuilt it is sub cut and a granular material is imported for a better base why - would that ever have to be replaced? With the rapidly changing technologies for maintaining and persevering streets once a street is properly rebuilt it may never have to be totally rebuilt again. Generally, a proper maintenance/preservation plan will include pothole repair, crack filling, seal coating and spot concrete repair. Over a longer period of time, mill and overlay or reclaiming of the bituminous surface will be necessary. The crack filling/seal coating program staff would suggest is as follows: • Newly reconstructed or reclaimed bituminous surfaces be crack filled and seal coated after three years. • All other streets, except those still planned for reconstruction, be crack filled and seal coated on a seven year rotation. Streets in areas that see a much higher percentage of heavy commercial/industrial vehicles may need a slightly shorter rotation, say five years. • A program that would crack-fill those streets one year that are planned to be seal coated the next year. • Eventually, get to a system where the entire City is divided into sections where the crack filling and seal coating is programmed out in fiscally equivalent areas that complete the entire system over a seven year cycle. • Areas that are coming up for crack filling would also be looked at for any concrete repairs that may be needed so they are completely ready the next year for seal coating. The other issue that needs to be addressed in our street system is the bituminous delamination problem that has occurred on a few of our streets. The issue can be addressed by either spot milling and repaving if the problem is isolated or milling of the top lift of bituminous and overlaying where the problem is more wide spread. From a budget perspective to crack fill and seal coat one-seventh of the total street system in 2012 would cost an estimated $135,000. This is the minimum amount, adjusted for inflation, that should be budgeted yearly for maintaining the street infrastructure. Repair of the delamination issue discussed previously would be in addition to this amount. Staff would recommend that it would be better to increase the budget for maintenance and preservation of streets recently rebuilt and slow down reconstruction of the remaining streets to an every other year schedule. City Council Meeting PAAdminlCouncil\Agendas&Packet Information120 1 111 0-1 7-1 1 Page 2 of 3