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Mill Valley presentation: five-year pavement plan cites PCI gains, warns loss of MST would grow backlog
Summary
Consultants told the city council Mill Valley's pavement condition index has risen to 79 and recommended a critical-point management strategy; they warned that losing MST funding would reduce revenue, increase backlog and likely lower PCI without additional funding.
Mill Valley city officials and outside consultants reviewed a five-year pavement management plan on Jan. 8, reporting the city's system Pavement Condition Index rose from 64 in 2016 to 79 today and recommending a mix of targeted maintenance and rehabilitation to preserve that progress.
Joe Ryrie of Pavement Engineering, Inc., who developed the report, told the City Council that the most cost-effective approach is "doing the right treatment to the right pavement at the right time," and urged a critical-point management strategy that catches streets before they fall to more expensive treatments. "At least $3,000,000 per year is what you need to be spending," Ryrie said, and he said an optimal annual investment of about $5,500,000 would eliminate the current backlog within five years.
The presentation laid out the city's condition and cost picture in detail. Ryrie said Mill Valley is responsible for 61 centerline miles (about 7,000,000 square feet) of pavement. The report estimated current treatment needs at roughly $27,000,000 total: about $5,300,000 to keep roads rated good-to-excellent from slipping, $12,500,000 for mid-range treatments and $9,300,000 for failed pavement reconstruction. Ryrie said those are "today's dollars" for the next five years and that the distribution of cost is skewed: 83% of the pavement area is in good-to-excellent condition but represents only about 20% of the current cost.
Consultants presented revenue scenarios tied to the city's existing funding streams (CIP, MST, gas tax, road impact fees, Measure A and AA). They projected roughly $14,100,000 could be available for paving over the next five fiscal years if current revenue sources continue. Ryrie cautioned that if MST funding is not renewed, projected annual revenue could fall to about $1.84 million and backlog could rise from $9.3 million today to $18.9 million, even while the PCI shows only modest drops; "the backlog of work is what's catching up to you," he said.
Council members pressed consultants on trade-offs and community impacts of ramped-up spending. One council member asked whether $3 million per year would hold system PCI near 80; consultants confirmed that under the modeled scenario, continuing roughly $3 million annually would keep the system near current levels while a sustained $5 million a year program would be more aggressive but manageable. The consultants also noted unfunded mandates that could add costs, including ADA ramp-triggered work and water-board stormwater mitigation requirements (estimated at roughly 15'0% of paving dollars), and they warned heavier axle loads from electric vehicles could shorten pavement life.
During public comment, resident Paula Reynolds asked that her neighborhood loop (Eldridge, Woodbine, Greenwood, Upland) be prioritized and offered that neighbors could contribute to or "piggyback" on city work to accelerate repairs. A council member echoed interest in community cost-sharing if projects align with the critical-point assessment.
No formal vote on the pavement plan occurred. The meeting moved to closed session after the presentation; council members thanked staff and the consultant and signaled the report will inform upcoming project selection and budget discussions.
