#73 limestone, also known as #73 stone, dense-graded limestone, compactable limestone base, or driveway base stone, is a well-graded blend of crushed limestone, smaller aggregate, stone dust, and fines. It is commonly produced as 3/4-inch-minus material, meaning the mix contains particles ranging from approximately 3/4 inch down to fine limestone dust. Exact gradation may vary by quarry and regional specification.
The combination of larger stone and fines allows #73 limestone to compact into a dense, firm, and level surface. The coarse aggregate provides load-bearing strength, while the smaller particles fill the spaces between the stone and help the material lock together under pressure. When properly graded, moistened, and mechanically compacted, it creates a durable base that resists shifting, rutting, and settlement.
#73 limestone is widely used for residential, commercial, and roadway construction because it provides dependable compaction and long-term structural support. It performs especially well beneath driveways, access roads, asphalt, concrete, and other finished surfaces that require a stable, accurately graded foundation.
Common Applications of #73 Limestone
- Driveway and residential access-road bases
- Compacted road base and gravel access roads
- Base layer beneath asphalt or concrete
- Parking pads and equipment areas
- Construction entrances and staging zones
- Utility trench and structural backfill
- Foundation and slab base preparation
- Gravel surface reinforcement and resurfacing










