Quarry Spalls 3–6″.
Our quarry spalls (3–6″) are angular basalt straight off the quarry face stone that locks, drains, and stays put. It is the ideal working rock under driveways, ditches, and anywhere water needs to move instead of pool.
Where spalls earn their keep.
The jobs this material shows up on every week — straight from the crew that loads it.
French drains, curtain drains and dry wells — the voids between angular stone move water while the rock holds grade.
Stabilizes soft spots under driveways and pads before the structural fill goes on top.
Lines ditches and channel bottoms where moving water would wash smaller stone away.
Farm lanes and ranch roads that see equipment traffic and don’t need a finished look.
One yard of spalls, measured out.
Pick your depth, read what one yard covers, and order by the math — the same math the loader runs.
Depth & coverage
| Depth | 1 Yard Covers | Best For |
|---|---|---|
| 6 in | 54 ft2 | Drainage blankets |
| 8 in | 40 ft2 | Ditch lining |
| 10 in | 32 ft2 | Sub-base lift |
| 12 in | 27 ft2 | Heavy channel armor |
Coverage = 27 ft3 at depth. Angular stone settles less than soil — a 5% fudge factor usually covers it.
The numbers the yard loads by
Spalls, up close.
Photos from the piles and the finished work — what this material looks like when it lands.
The rest of the catalog.
Same-day loads, same truck, same crew — four more materials the yard runs.
Ready when you are.
Know your yards? Call the yard and we’ll load it today. Not sure yet? We’ll do the math with you and quote the whole drop in one call.