Gravel, Crushed Stone and Soil Delivery in Atlanta, GA

Paved ground over crystalline rock

The USDA soil survey maps the center point of ZIP 30303 as Urban land, with 100 percent of the map unit paved or built over. Any project nearby is likely to meet fill, old base stone or compacted subsoil rather than a natural soil profile.^[1]

Old base stone sometimes turns up just under a removed slab or lawn. If it is clean and packed, it can stay as the lower layer of a new base, which saves digging and hauling.^[1]

Dig a test hole before ordering. Firm, gravelly fill can serve as a subgrade, while soft or debris-laden material should come out of the footprint of any drive, pad or patio and be replaced with packed Road Base.^[1]

New beds and lawns will need soil brought in. Topsoil, Garden Soil and Compost are the starting materials for anything that grows on fully built-over ground.^[1]

The geologic map shows mica schist, gneiss and amphibolite at the center point of ZIP 30303, a Precambrian unit of very old metamorphic rock. These rocks weather slowly into a soft, crumbly layer before they reach hard rock, so an excavation can pass through a zone that digs easily before it meets anything solid.^[2]

The ground at the center point stands 1,050 feet above sea level.^[3]

Hard rock near a planned trench or footing is worth finding early. A rented breaker or a change of layout can save a day of chipping, and the broken pieces can go behind a retaining wall along with the drainage stone.^[2]

Mica in weathered schist makes soil feel slippery and can weaken it when wet. A geotextile under any base keeps that material separate from the stone, so the base stays firm through a rainy season.^[2]

Thunderstorms and runoff

The NOAA normals station at Atlanta Fulton Co AP, GA, about 8 miles away, averages 48.1 inches of precipitation a year. Summer thunderstorms can drop heavy rain in a short time, and built-over ground sends most of it straight to the nearest low point.^[4]

On a small lot, that runoff needs a planned route. Slope every surface away from buildings, line low channels with River Rock or Riprap, and send downspouts to a splash basin of stone or a buried pipe set in Drain Rock.^[1],[4]

Leaves and debris from a summer storm can clog drain inlets and gravel trenches. Clear them after each big rain so the next storm finds an open path.^[4]

Open stone surfaces help. A patio of Pea Gravel or 3/8" Crushed Stone soaks up rain that would run off paving, and a strip of #57 Crushed Stone along a wall catches roof drip before it splashes mud.^[4]

Choosing between Road Base and #57 Crushed Stone under a pad

Road Base and #57 Crushed Stone are both common under parking pads, and they work differently. Road Base contains fines that pack into a dense, almost solid layer. It carries weight well and resists rutting, but water runs off its surface rather than through it.^[1]

#57 Crushed Stone is clean, single-size stone that locks together without fines. Water drains straight through it, which helps on a lot where runoff has nowhere else to go, but it needs fabric underneath and edging to stay in place.^[4]

For a driveway, Road Base under a thin layer of Driveway Gravel gives the firmest result. For a pad that must drain, such as beside a garage or under a shed, #57 Crushed Stone is the better pick.^[1],[4]

Courtyards, planters and mulch

Small outdoor spaces in a dense neighborhood mean containers, tree pits and courtyard beds. Garden Soil fills them straight from the load, and a layer of Drain Rock at the bottom of deep planters lets water escape after a storm.^[1]

A courtyard bed against a building wall should stay a little below the siding or brick line, with a strip of stone between soil and wall so rain splash does not stain the face.^[4]

Mulch helps every bed in a warm climate. Brown Shredded Mulch, Red Mulch or Black Shredded Mulch shades soil, slows evaporation and keeps weeds down. Wood Chips make soft, permeable paths between beds.^[4]

The Fulton Co station records 52 days a year with a low of 32 F or colder. Its median last spring freeze arrives on March 24, and the median first fall freeze on November 8. Plant tender annuals after the spring date, and set out shrubs and trees in fall.^[4]

Shredded mulch and Wood Chips each have a place in a warm, wet yard. Brown Shredded Mulch, Black Shredded Mulch and Red Mulch are fine and even, so they look tidy in beds near the house and knit together against heavy rain.^[4]

Wood Chips are coarser and break down more slowly, which suits tree rings, natural areas and paths. Over a long growing season, both need a top-up each year, and fall is a good time to refresh them before the colder nights arrive.^[4]

Patios, walkways and retaining walls

A paver patio over fill needs a deeper base than one over firm native soil. Clear soft material, lay fabric, pack Road Base or 3/4" Crushed Stone in thin lifts, then screed a thin bed of Concrete Sand and set the pavers. Lock the edges and pitch the surface away from the building.^[1]

Where a patio sits near hard rock, a test hole shows how deep the soft, weathered layer goes. If rock is close, build the base up rather than down.^[2]

Flagstone paths can rest on Stone Dust Screenings, which pack smooth and level. Walkway Gravel works for a simple path, and Decomposed Granite gives a firmer, natural surface for a garden walk.^[4]

Small lots in a dense area may need a short retaining wall to make a level patio or parking space. Set the bottom course on a packed footing of Road Base or 3/4" Crushed Stone, backfill behind the wall with #57 Crushed Stone, and lay a perforated pipe at its base so water drains instead of pushing on the blocks.^[1]

Separate the drainage stone from the soil behind it with fabric. Weathered schist and fill both carry fine particles that would otherwise wash into the stone and clog it within a few seasons.^[2]

Housing in ZIP 30303

The Census counts 1,842 housing units in ZIP 30303. Just 2 percent are detached single-family houses, and the median home was built in 1967. Owners occupy 18 percent of the homes that are lived in.^[5]

Atlanta as a whole has 265,899 housing units. Detached houses account for 36 percent of the city's housing, and the median build year is 1989.^[5]

The Georgia Department of Transportation names the crushed layer under its pavements Graded Aggregate, Section 310, in its Standard Specifications Construction of Transportation Systems (2021).^[6]