How much #89 stone do you need?
Enter the size of your chip seal, pipe bed or garden walk. You get tons, cubic yards and truck loads of #89 stone.
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How this was worked out
Assumes #89 stone at 1.4 tons per cubic yard. Yard stone runs bigger or smaller from one pile to the next, so ask your supplier for their number.
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About #89 stone
#89 stone is small crushed stone, mostly 3/8 inch and down, with a little coarse sand mixed in. It turns up in tar and chip road surfaces, in asphalt mixes, and as fine bedding around small pipe. Laid an inch or two thick and tamped, it makes a firm walking surface.
More about #89 stone
In the standard size chart, #89 passes a 1/2 inch screen, most of it is held between 3/8 inch and the #16 screen (about 1/20 inch), and a few percent is fine enough to pass a #50 screen. That small tail of sand is what sets it apart from #8 stone.
For a garden walk or dog run, spread 2 inches over a packed base and tamp it. The angular chips knit together better than pea gravel and stay comfortable underfoot. As pipe bedding, 3 to 4 inches under and around a small drain or water line gives the pipe even support along its length.
Some suppliers sell it as 3/8 chip or chip stone. Paving crews spread it over hot liquid asphalt on country roads and roll it in to make a tar and chip surface. The sand in it holds a little more water than clean stone does, so a load from an open pile after rain weighs a bit over the dry figure.