County considers slurry and asphalt "cap" to reduce long-term road costs

Brown County's county counselor outlined an alternative approach to recurring chip-seal maintenance that he said could reduce long-term costs and road deterioration.

"There is a strategy that we could potentially use maybe between $6 roughly $6 a ton for a different type of slurry mix," County Counselor Austin said, describing a slurry product that is sprayed to stabilize the base, reduce dust and, after several years of stabilization, allow placement of an asphalt cap. Austin said with a solidified base, some roads could receive a 3-inch asphalt overlay and then be managed with periodic slurry maintenance.

He told commissioners the approach requires triaging roads by structural condition—applying asphalt to heavily trafficked, high‑truck routes and using slurry for light to medium roads. Austin outlined a financing option for large phased projects ("$20 to $25 million" scale) with bond repayment over 20–25 years; he said that could reduce annual maintenance spending and staff/rolling‑stock needs.

Commissioners asked for detailed numbers and cautioned about increasing county debt. "If you're financing operational improvement, okay, then you're being strategic about it," Austin said, adding the county should calculate savings and present a cost-benefit analysis. Commissioners agreed to ask Austin and staff to prepare estimates, sample project sites to visit and financing scenarios for a future workshop.

Next steps: counsel and road staff will compile tonnage and cost estimates, identify candidate roads for pilot treatments and return with a budgetary and financing recommendation.