PAVEMENT MANAGEMENT BUDGET OPTIONS REPORT

Executive Summary
Capitol Asset & Pavement Services, Inc. was contracted by the Metropolitan Transportation Commission to perform visual inspections of all of the paved streets maintained by the City of Calistoga (City) as part of the P-TAP 22 grant program. All 15.28 centerline miles of paved streets maintained by the City were evaluated in accordance with MTC standards and the Streetsaver Online 9.0 database was updated with the inspection data. Field inspections were completed in July, 2021.

The maintenance decision tree treatments and costs were reviewed and updated to reflect current pavement maintenance treatment prices. A budgetary needs analysis was performed based on the updated inspections and treatment costs and four budget scenarios were evaluated to compare the effects of various funding levels.

The City’s street network consists of 15.28 centerline miles of streets. A detailed visual inspection of the City’s streets resulted in a calculated average PCI of 60. Using a 0-100 PCI scale, with 100 being the most favorable, a rating of 60 places the City’s street network in the 'Fair' condition category.

Four scenarios were analyzed for various street maintenance funding levels. The budgets include preventative maintenance and rehabilitation work for existing paved street surfaces. The City’s current strategy of street maintenance, along with current prices for the treatments, is represented in the Streetsaver decision tree matrix. This matrix defines what treatments need to be applied to streets in varying PCI conditions. Utilizing this decision matrix, it was determined that the City will need to spend $16.4 million over the next five years to bring the street network into ‘optimal’ condition, or an overall street network PCI of 85. At this level, the City should be able to maintain the street network in the future with primarily cost-effective preventative maintenance treatments (crack seals and surface seals). Comparing this with the current funding level of $5.0 million over the next five years shows that the average network PCI increases by seven points, to 67 by 2026. Scenarios were also run to determine the funding level required to increase the overall network PCI by five and ten points over the next five years. Scenario analyses show that at current funding levels, the overall street condition should continue to improve. Table 1 summarizes the findings of the Scenarios.

As more ‘Fair’ streets deteriorate into the ‘Poor’ and ‘Very Poor’ categories, the cost of deferred maintenance will continue to increase. The cost of the deferred maintenance backlog will stop increasing only when enough funds are provided to prevent streets from deteriorating into a worse condition category, or when the whole network falls into the ‘Very Poor’ category
(i.e. cannot deteriorate any further). At that time, the network would have to be replaced at a cost of $55.6 million.

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Please contact Senior Civil Engineer Hamid Heidary at 707-942-2828 or hheidary@ci.calistoga.ca.us