There are approximately eight-and-a-half centerline miles of public streets that are maintained by the Town. For decades, the Town Council has funded street maintenance projects, which usually included a hot mix asphalt concrete overlay or slurry seal of an existing street. Yountville has a three year average Pavement Condition Index (PCI) of 71, which is in the “Good” category and best in Napa County with American Canyon. The Town rating is due largely to the fact that General Funds are spent in addition to local gas tax funds. From 2005 to 2010, the Town spent an average of $250,000 per year on pavement maintenance.
Streets continuously deteriorate from heavy traffic loadings and ageing from water oxidizing the pavement, but deterioration accelerates between the tenth and twentieth year without maintenance. Delaying repairs can result in the cost of repairs increasing as much as 30-fold, so the Town’s annual Capital Improvement Program (CIP) includes a Pavement Management Program (PMP) and Slurry Seal Program for restoring the pavement integrity of streets.
Streets with the most need for resurfacing are reviewed for coordination with other upcoming Town and potential private development and public utility work. This is done to minimize damage to newly paved streets by such work at a later date after the pavement has been replaced. A slurry seal is used for streets with lower levels of distress as indicated by the Pavement Condition Index (PCI), as shown in the Pavement Management Program (PMP). A slurry seal is a mix of liquid asphalt and small rocks that is used to protect the street from the sun and rain. It is ten times less expensive than an inch of asphalt concrete overlay and will allow the overlay to be deferred for a decade or more. The PMP pavement condition survey is updated every few years and is one of the Town’s primary tools for determining the most cost effective method of street maintenance or repair that is appropriate for the condition of the road or street.
In 2010, the Town received a grant from the Metropolitan Transportation Commission (MTC) to update the Pavement Management Program (PMP), which provides a management tool to inventory street pavements, assess pavement condition, record historical maintenance, forecast budget needs, and view impacts of funding on Town-wide pavement condition over time. MTC has found that preventive maintenance stretches the approximately $65,000 gas tax funding available for street maintenance. MTC hired Associated Engineering Consultants, Inc. (AEC) to update the Town’s PMP.
AEC staff evaluated every street in Town, developed a preventive maintenance program, selected the most cost effective repairs, identified possible ways to generate additional funding, and prepared the “P-TAP 12 Pavement Management Plan Update” that can be found at the link below. Each street was given a PCI number and the average PCI for all the Town streets is used by MTC for the annual “Pothole Report”, which was profiled in an article in the Napa Valley Register in July 2011.
Typically, Gas Tax and Development Impact Fee funds contribute to street maintenance project funding. The Town receives approximately $65,000 per year in gas tax revenue and needs to spend an average of $148,000 on pavement management to keep our streets in the “Good” rating which is 70 to 79. An average of $310,000 per year is necessary to increase the average PCI to 76 in 2016.
The following files provide more information about the Town's Pavement Management Program.
Click on the following link to see a street sweeping map and schedule for Yountville. There is additional sweeping on Fridays in the fall to pick up leaves. Property owners are asked to place leaves in their green waste toters and not in piles in the street, storm drains or Hopper Creek.