Bulk Aggregates near Raleigh, NC, 27613

Angular base on the mapped slope

At the ZIP's center point, the USDA soil survey maps Pacolet sandy loam on 10 to 15 percent slopes. For a driveway or patio, use a compacted angular crushed-stone base with defined edges to support the surface on a grade.^[1]

Pacolet makes up 85 percent of that mapped soil unit, and the top mineral layer is sandy loam. A geotextile beneath a crushed-stone base keeps the sandy loam from mixing upward into the stone.^[1]

Stone layers for moving water

The USDA soil survey rates the mapped soil as well drained and places it in hydrologic group B with moderate infiltration. Use open Drain Rock or #57 Stone for a drainage layer below or beside a hard surface.^[1]

The top 100 cm of soil has low shrink-swell, measured at 2.2 percent. Compacted Road Base provides a firm leveling layer below driveway gravel or a patio surface without relying on loose soil for final grade.^[1]

Rock and weather at the site

Mapped geology at the ZIP's center point is Biotite Gneiss and Schist, including biotite gneiss, mica schist, amphibolite, and granitic rock. When excavation exposes firm rock, grade the subgrade evenly before placing angular base stone instead of filling irregular hollows with surface stone.^[2]

The NOAA station at Raleigh Durham Intl AP, NC, about 4 miles away, records 46.1 inches of average yearly precipitation. Give a patio base or driveway base a drainage path to an open stone layer so rain stays away from fines.^[3]

That NOAA station averages 5.2 inches of snowfall and has 65 days each year when the low reaches 32 F or colder. A well-compacted crushed-stone base and free-draining stone below it limit water held in the layer during freezing conditions.^[3]

The median last spring freeze is March 31, and the median first fall freeze is November 4. For a garden bed, use Top Soil as the planting layer and Shredded Mulch as a separate surface cover instead of mixing mulch into the soil.^[3]

Housing context and road reference

Census data shows 61 percent of homes in this ZIP are detached single-family houses, compared with 44 percent across Raleigh, and the ZIP's median home construction year is 1994 compared with 1997 citywide. For a driveway or patio at a detached property, choose a defined crushed-stone base and restrained surface stone instead of round Natural Pea Gravel for a locked surface.^[4]

The North Carolina DOT road-building standard is Aggregate Base Course, Section 520, Standard Specifications for Roads and Structures (January 2024). For work governed by road plans, use that document to identify the required aggregate base. In North Carolina orders during the last 24 months, customers most often ordered Driveway Gravel and Crusher Run, with a median order size of 6 tons.^[5],[6]