Patching & Pothole Repair in Duluth, MN

Asphalt patching replaces a section of broken pavement with new, compacted material, and in Duluth it is mostly spring and early summer work, because the potholes and soft spots that appear in April and May began as cracks that let meltwater into the base. A proper driveway repair cuts the damaged area out square, removes wet or contaminated base, compacts new gravel, and fills with hot-mix asphalt rolled flush with the surrounding surface. Cold patch from a bag is only a stopgap. Once the patch has cured, the driveway can be sealed so old and new surfaces wear together.

The spring timing follows the physics of thaw. Frozen ground thaws from the top down, so in March and April the upper part of the base turns wet while the soil below is still frozen and cannot drain it. Pavement over that saturated layer flexes under every tire, and the cracks that took in water all winter break out into potholes. MnDOT restricts heavy truck weights on state highways every spring for the same reason; in 2026 its North zone restrictions ran from March 20 to May 15, about two and a half weeks after the southern zones began.

Patch type sets both price and lifespan. By HomeGuide's 2025 numbers, a square foot of patch costs $2 to $4 cold, $2 to $5 hot, $2 to $6 by infrared and $4 to $12 saw-cut and full depth, a single pothole typically runs $100 to $400, and service minimums of $100 to $250 are common. Cold patch buys time in April. Infrared repair reheats and reworks the existing surface and suits shallow damage. Deep failures, where the base itself has pumped out, need the saw-cut method.

On a hillside driveway the lowest part usually fails first, because runoff, sand and plow damage concentrate there, and the patch must be built to shed water rather than trap it. The edges of the patch are sealed so meltwater from above cannot follow the cut line down into the new base. When a repair reaches into the apron or the street edge, it becomes right-of-way work, and Duluth requires engineering approval and an excavation permit before anyone cuts there.

Patching has a limit. When patches start covering a large share of the driveway, or new failures keep appearing beside old ones, the base is showing that it has reached the end of its life, and an overlay or full replacement on the asphalt paving page is the better use of money. The cost page sets patch prices beside overlay and replacement ranges so the comparison is easy to make.