What millings are
When roads are resurfaced, the old asphalt is ground off and crushed into small pieces. Those "millings" still contain asphalt binder. Spread, graded and compacted — ideally on a warm day — they knit together into a firm surface that's much less dusty than gravel.
How they compare
| Gravel | Millings | New asphalt | |
|---|---|---|---|
| Relative cost | Lowest | Low to moderate | Highest |
| Dust | A lot on sandy lots | Much less once compacted | None |
| Surface | Loose, ruts | Firm, slightly rough | Smooth |
| Upkeep | Regrade and add rock | Occasional touch-up | Sealcoat and crack seal |
| Look | Rustic | Dark gray, uneven | Finished |
Where millings work well here
- Long drives on larger lots in Rio Rancho Estates and the northern areas
- Side yards, RV and trailer parking, shop and barn access
- Dirt-road lots where you want less dust and mud now and may pave later
- As a base under future asphalt
Where they don't
- Steep slopes where loose edges wash in storms
- Tight turnarounds with lots of tire scrubbing
- Homes in HOAs that require a paved surface
Doing it right on sand
Rio Rancho's loose sand is the challenge. Millings dumped straight onto sand will rut and spread. A good millings driveway starts with grading for drainage, a compacted base, 3–4 inches of millings, heavy rolling, and support along the edges. Some owners add a tack or emulsion spray to bind the top. See paving on sand and caliche.
Cost
Millings typically land well below new asphalt and somewhat above plain gravel per square foot, depending on depth, base work and trucking. For a side-by-side number on your lot, call (505) 207-4231.
Common questions
Do millings get as hard as asphalt?
No, but compacted millings get much firmer than gravel, especially after a summer of sun and traffic.
Are millings environmentally friendly?
They reuse old pavement that would otherwise be hauled away, so many owners like that.
Can I pave over millings later?
Yes. A well-compacted millings driveway can serve as a good base for new asphalt.