Collin County adopts road-upgrade criteria to prioritize converting high-use county roads to hot-mix surfaces

The Collin County Commissioners Court voted 5-0 to adopt new county road upgrade criteria that prioritize converting the most heavily traveled or load-stressed county roads from two-course chip seal to hot-mix pavement, county staff said.

Mr. Klein Hechsel, the Public Works representative, told the court the county originally applied a chip-seal standard that is no longer adequate for many roads. "We're looking at a minimum 20 year life cycle on these roads," Hechsel said, arguing that rebuilding from the subgrade up and rejuvenating base materials would produce a higher-quality surface that lasts longer.

Commissioners pressed staff on the tradeoffs between chip seal and hot-mix approaches. One commissioner noted typical chip-seal lives of "7 to 10 year[s]" under appropriate loads but said current traffic patterns have shortened that lifespan. Hechsel acknowledged wide variation depending on subgrade conditions and told the court there is "no way I can provide" a single per-mile price until crews evaluate soils and base materials.

On funding, Hechsel said he expected to use bond funds that the county will receive to start the initial phase. He cited an example sample of 10 roads to illustrate application of the criteria and said roughly 50% of that arbitrary sample met the threshold for hot-mix under the proposed rubric. Commissioners asked staff to include personnel and contractor costs when presenting future project estimates.

The court approved the adoption by motion, directing staff to prepare a formal court order to document the action. The motion passed 5 to 0.

Court members and staff said the policy will not convert all county roads; many lower-scored roads will remain chip seal. Implementation will depend on available bond proceeds and future budget decisions.