Asphalt
Alligator Cracking Repair in Tigard, Oregon
Cojo
June 15, 2026
7 min read
Alligator cracking repair in Tigard means fixing the base, not the surface. That scaly, interconnected pattern is fatigue failure — the rock and soil under your asphalt stopped supporting it, so the surface fatigued and broke apart. Sealcoat and crack filler will not hold it; they reflect within a season. The durable repair is to saw-cut the failed area, dig out the soft base, rebuild with compacted rock, and pave back. In Washington County, the cause is usually winter water in Tualatin Valley clay plus heavy turning-and-braking loads at busy retail lots. Here is how a real repair works.
Alligator cracking — fatigue cracking — is a web of connected cracks shaped like reptile skin. Unlike a single crack you can seal, it is a structural alarm: the asphalt has been flexing under traffic with weak support, and it has finally failed.
In Tigard you see it most in drive aisles and entrances at retail centers near Hwy 99W and the Tigard Triangle, and on aging office and apartment lots off Hwy 217, where vehicles turn and brake over the same spots all day. Once water reaches that cracked base during the wet season, potholes follow fast — right where customers drive.
Start with our pavement distress diagnosis guide to see how it fits with other distresses.
Tigard pavement fails from below when its base loses strength. Washington County's silt and clay soils hold winter moisture, and a wet, soft subgrade flexes under load — exactly what fatigues asphalt, especially where traffic concentrates.
To understand the mechanism, read what causes alligator cracking and sub-base failure warning signs.
The common Tigard mistake is paying for a sealcoat or skin patch over alligatored asphalt in a busy drive aisle. Because the base is the real problem, the cracking reflects right back through the new surface within a season — fast under constant traffic. You spend money twice, and the potholes return where customers see them.
The only repair that lasts removes the failed structure:
The scope depends on how deep and how widespread the failure is. Isolated soft spots are simple full-depth patches; widespread alligatoring across drive aisles points to resurfacing or reclamation.
| Situation | Typical approach |
|---|---|
| Isolated soft spot at an entrance | Full-depth patch, single area |
| Several scattered fatigue areas | Multiple full-depth patches |
| Widespread cracking across drive aisles | Mill and overlay or full-depth reclamation |
| Cracking plus standing water | Repair base + correct drainage first |
Asphalt prices follow oil and the regional index, and Oregon's May-to-October paving window means metro crews book out early. On a Tigard retail lot, the cheapest bid that only patches the surface is usually the most expensive choice over five years, because constant traffic pushes the cracking right back.
We find the real edge of the failure, fix the base, then pave — and we phase the work to keep your lot usable. Cojo is CCB licensed and insured and serves Tigard and Washington County, working the Hwy 217 and Hwy 99W corridors from our Hood River base.
If you have scaly, connected cracking on a Tigard lot or driveway, get it evaluated before it becomes a field of potholes. See our asphalt repair services and our Tigard crack repair page, then request an assessment.
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