08-05-13 Council Packet - Laserfiche WebLink

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17 ROADWAY PAVEMENT CONDITION PROJECTIONS Using the computer analysis, the expected useful life of each block was projected. This was done using the maintenance approaches and the reconstruction levels that have occurred over the past years within the City. This analysis showed that if the City continues its current process of special maintenance and reconstruction at the same rate it has averaged over the past years, there will be serious deterioration of the roadway system and ultimately very high reconstruction expenses. It was p rojected that if current maintenance practices continue to be used over the next 10 years with the current budget that is in place ($490,000 per year for seal coats and cold in place recycles), the average OCI will drop from 66.95 to 60.69 at the end of 10 years. Not only would this reduction in the overall condition of the roadways most likely be unacceptable to the public, it would be very expensive, an estimated $4 5.7 million in 2023 (Plan Year 10), to restore the overall system at the end of that time to only its current condition today. MAINTENANCE COSTS INCREASE AS PAVEMENT GETS OLDER Maintenance costs increase considerably as the pavement gets older. This is why implementing a preventative maintenance strategy is both cost effective appropriate. Preventative maintenance actions such as crack seals, chip seals, fog seals, and microsurfacing are done at a much lower cost than preservation actions such as mill and overlays. The idea behind a preventative maintenance strategy is that you keep the g ood roads in good condition by applying the appropriate maintenance action at the right time at a lower cost. This is often a better strategy then waiting for the road to deteriorate before applying a fix at which point the fix needed may cost 9 to 10 tim es as much as a chip seal or a fog seal. Figure 2 demonstrates that with preventative maintenance techniques you can extend the life of a pavement from 20 years to close to 60 years if the correct fix is done at the correct time. The previous pavement management report created in 2004 indicated that the cost to reco nstruct all the roads that needed to be reconstructed at the end of 10 years was $39 million. The updated model indicates that now at the end of 10 years the cost to reconstruct all the roads that need to be reconstructed is close to $4 5.7 million. This dollar amount will continue to get bigger unless something is done. A good pavement management plan will budget for both preventative maintenance, to keep the good roads good, and also for some roads to be reconstructed each year so that the worst roads s tart to be addressed. Figure 5 shows the effect certain budgets have on the OCI values.