2010051706 - Project 09-10C - FY 2009/10 Street Repair and Resurfacing Program - Advertise for Bids

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