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Bremer County engineer pitches hot-in-place recycling pilot for select county roads
Summary
County Engineer Landon Moore proposed piloting hot-in-place asphalt recycling on two county stretches, describing the process — heating pavement to ~280–300°F, mixing the top ~2 inches and recompacting — and estimating $75,000–$80,000 per mile.
County Engineer Landon Moore updated the Bremer County Board of Supervisors on planned maintenance and a possible pavement pilot using hot-in-place recycling.
Moore identified priority crack-seal and culvert work and said the county is considering a pilot on a two-mile stretch of T77 west of Waverly and a one-mile section from the Waverly city limits to the Business 218 overpass. "They heat the pavement to 280 or 300 degrees, and then they mix up the top like 2 inches," Moore said, describing the process of heating, mixing with oil and recompacting the surface so it opens to traffic quickly.
Moore provided preliminary per-mile cost figures, putting the hot-in-place portion at about $75,000 per mile or just under $80,000 per mile depending on the final specification. He cautioned that the process is suitable only where base failure or deep wheel ruts are not present; contractors advised against using the technique on roads with deep structural failure. Moore said the county will consult other county engineers who have used the method before moving forward and will return with more details after reviewing local pilot feasibility.
The board asked follow-up questions about equipment and traffic management; Moore said the contractor runs the process as a moving train of specialized equipment and that the chosen test stretches are close enough to monitor performance.
