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PAGE2 <br />MAY 4, 2010 <br />MAYOR AND TOWN COUNCIL <br />SUBJECT: PPW JOB NO. 09-1 OC - FY 2009/10 STREET REPAIR AND RESURFACING <br />PROGRAM 411-811-9901 <br />DISCUSSION (confd): <br />There are three major categories of streets: arterials, collectors, and residential. Arterial and <br />collector street repair and resurfacing are often eligible for Federal and/or State grant funding, <br />while residential streets are not, meaning they are typically funded with local funds. <br />Approximately 20% of the Town's streets are classified as arterials, such as Los Gatos <br />Boulevard, Winchester Boulevard, Lark Avenue. Approximately 18% of the Town's streets are <br />classified as collectors, such as University Avenue, Wedgewood Avenue, and Shannon Road. <br />The remaining 62% are classified as residential. <br />When sheets are designed and constructed, the typical estimated life of the street is 20 years <br />without major maintenance. However, the life cycle of a street can be greatly affected by a <br />number of factors, including; <br />• Preventative maintenance <br />• Volume and type of traffic (especially heavy truck traffic) <br />• Construction materials and techniques <br />• Condition of the sub-grade <br />• Environment (i.e. temperature differential) <br />• Water intrusion from rain and landscaping <br />• Frequency of trench cuts in the roadway <br />Each of the above factors can contribute to the premahue deterioration of street surfaces, <br />impacting the street section's stuuctural integrity and leading to structural failures. Once a sheet <br />has failed, the only effective remedy is a complete reconstruction. In addition to the significant <br />financial costs, there are other factors are also considered, including the potential disturbances to <br />residents and businesses as well as overall traffic flow, particularly during high demand periods. <br />The PCI categories for streets are established in the PMS program. A brand new street would <br />have a PCI of 100. The PCI values are broken down into four (4) categories: <br />Classification I -Very Goad (PCI 70 to 100) have little or no distress, with the possible <br />exception of utility patching in good condition, or signs of light cracking that may be <br />slightly weathered. <br />Classification II -Good (PCI 50 to 69) have severe weathering, moderate levels of <br />distress, limited patching, and non-load-related cracking. <br />Classification III -Poor (PCI 26 to 49) have moderate to severe levels of dish~ess <br />including load-related types of cracking, such as alligator cracking. <br />