Road Base

Aggregate base course, or ABC, is a dense-graded crushed stone mix.

Top course is the finish layer on a gravel driveway or road.

Fill material is loose dirt, sand, or crushed rock you dump to raise a low spot or plug a hole in the ground.

Sand is rock ground down into loose grains, usually between 0.075 mm and 4.75 mm across.

#10 stone is crushed rock screened to 3/8 inch and smaller, with all the fine dust left in.

Base gravel is crushed rock with all the dust and small chips left in.

Paver base is crushed rock that runs from about 3/4 inch down to a fine dust, all mixed together in one load.

#4 stone is crushed rock roughly 3/4 inch to 1 1/2 inches across, with the fines washed out.

Crushed stone is rock broken down at a quarry and screened into sizes.

Subbase is the layer of rock that sits between the raw ground and your base gravel.

#11 stone is crushed rock screened from about 1/2 inch down to 1/4 inch, with most of the dust washed out.

#2 stone is crushed rock with pieces roughly 1.5 inches to 2.5 inches across.