Crushed Stone
We deliver every grade6aa Stone
6AA stone is crushed rock screened from about 1 inch down to a #8 sieve, with the fines washed out. The pieces are angular and clean, so they lock together and bond well with cement paste. Most Michigan pits make 6AA from limestone or dolomite.
The 6AA name comes from Michigan DOT's spec 902 for coarse concrete stone. The double A means it's the stricter grade, with tighter limits on wear, soundness, and clay lumps than a plain 6A. That's why it costs a bit more than driveway rock: you're paying for stone clean enough to go into bridge decks and highway pavement.
What people use it for
How to choose within 6aa 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
Chip Stone
We deliverChip stone is small crushed rock, roughly 1/4 inch to 1/2 inch across, with the dust screened out.
57 Stone
We deliver#57 stone is crushed rock screened between about 1 inch and 1/4 inch, with the dust washed out.
4 Stone
We deliver#4 stone is crushed rock screened between about 1 1/2 inches and 3/4 inch.
8 Stone
We deliver#8 stone is crushed rock screened between about 3/8 inch and 1/8 inch, with the fines washed out.
67 Stone
We deliver#67 stone is crushed rock screened between about 3/4 inch and 1/4 inch, with most of the dust washed out.
Crushed Stone 3 Stone
We deliver#3 stone is crushed rock in pieces roughly 1 to 2 inches across.
10 Stone
We deliver#10 stone is crushed rock screened down to dust and small pieces smaller than about 3/8 inch.
1 Stone
We deliver#1 stone is large crushed rock, roughly 2 to 4 inches across.
89 Stone
We deliver#89 stone is crushed rock screened between about 3/8 inch and the size of a coarse sand grain.
9 Stone
We deliver#9 stone is crushed rock screened to a 3/8 inch top size, with pieces running down to about the size of a grain of rice.
5 Stone
We deliver#5 stone is crushed rock screened between about 1 inch and 1/2 inch, with the fines washed out.
Crushed Stone 2 Stone
We deliver#2 stone is crushed rock screened between about 2 1/2 inches and 1 1/2 inches, with the dust washed out.