Skip to main content

Crushed Stone

We deliver every grade

6a Stone

6A stone is crushed rock sized from about 1 inch down to 1/4 inch. The bigger pieces sit on top and lock together, and the smaller ones fill the gaps between them. It's a clean stone with most of the fines screened out, so water drains through it fast instead of pooling on the surface.

The 6A comes from Michigan DOT's spec in section 902, and you'll see it called out on concrete jobs, drainage jobs, and driveway work across the Great Lakes. It's a size code, so it tells you how big the pieces are and says nothing about what kind of rock they came from. You'll see 6A made from limestone in most of Michigan and from granite or trap rock in other areas. It runs a little pricier than plain crushed run because the sizing is tighter.

4
named grades in this family
4
we can put on a truck

Compare every grade

GradeSizeShapeWashedTop useWe deliver
#6A Stone (3/4″ To 1.5″, Washed, Commercial)3/4" To 1.5"AngularWashedDrainage systemsWe deliver it
#6A Stone (3/4″ To 1.5″, Washed, Drainage)3/4" To 1.5"AngularWashedDriveway baseWe deliver it
#6A Stone (3/4″ To 1.5″, Washed, Mdot)3/4" To 1.5"AngularWashedDrainage systemsWe deliver it
#6A Stone (3/8″ To 1″, Commercial)3/8" To 1"AngularDrainage systemsWe deliver it

What people use it for

Ready-mix concreteDriveway topping over a compacted baseDrainage backfill behind retaining wallsBase under pavers and slabsFrench drains and trench fill

How to choose within 6a stone

Compaction over drainage

Angular pieces lock together. Pick a smaller size when you need the surface to stay put under a driveway or path.

Drainage over compaction

The larger the piece, the more room for water to move through. #1 or #57 for a French drain; #8 or smaller reads as loose gravel.

Washed vs. unwashed

Washed has the dust rinsed out, so it drains faster and won't track into the house. Unwashed compacts harder — better under a paver base.

Other crushed stone families

Browse all crushed stone families →