Bulk Aggregates near Greensboro, NC, 27455

Sloped sandy loam needs an interlocked base

At the ZIP's center point, the USDA soil survey identifies Poplar Forest sandy loam on slopes of 15 to 35 percent, and Poplar Forest accounts for 80 percent of that map unit. For a driveway or patio base on ground with this amount of slope, angular crushed stone provides a more interlocked foundation than round stone and needs a controlled edge to hold the surface in place.^[1]

USDA classifies the soil there as well drained and places it in hydrologic group B, meaning moderate infiltration. A compacted crushed-stone base supports traffic, while open Drain Rock at drainage outlets moves water without relying on water-holding fines.^[1]

Rain and freezing temperatures affect layer choices

The NOAA station at Greensboro WTP, NC, about 7 miles away reports 45.9 inches of average yearly precipitation and 63 days when lows reach 32 F or colder. For a patio base or driveway, keep the compacted support layer separate from the drainage layer, using open stone where water needs to move instead of fines that retain it.^[2]

At that NOAA station, the median last spring freeze is April 1 and the median first fall freeze is November 4. For garden beds, use Shredded Mulch as a surface cover around plants when the freeze timing suits planting work, not as structural material below a patio or drive.^[2]

Rock, housing, and material references

The mapped geologic unit at the center point is Granitic Rock, described as granite, and ground elevation is 750 feet. For a patio, use placed and compacted crushed stone for the level support layer because mapped native rock is not a substitute for a prepared base.^[3],[4]

Census data shows 64 percent of homes in this ZIP are detached single-family houses, compared with 52 percent across Greensboro, and the median home construction year is 1995 here versus 1985 across Greensboro. For a driveway at a detached home, use angular crushed stone in the load-bearing layer and reserve round stone for a low-traffic visible surface.^[5]

The North Carolina Department of Transportation names Aggregate Base Course, Section 520, Standard Specifications for Roads and Structures (January 2024) as its road-building standard. In American Rock Supply orders delivered in North Carolina during the last 24 months, Driveway Gravel and Crusher Run were ordered most often, with a median order size of 6 tons.^[6],[7]