Gravel, Stone, Soil and Mulch Delivery in Greensboro, NC

Rain that soaks in slowly

The NOAA station at Greensboro WTP, about 2 miles from the ZIP, averages 45.9 inches of precipitation a year. That is a lot of water to move off a yard, a drive and a roof, and it falls in every season.^[1]

At the ZIP's center point the soil survey places the main soil in hydrologic group C, meaning water infiltrates it slowly. The same soil is rated well drained, so water does leave it, just not quickly during a hard storm. During a downpour, more water runs across the surface than soaks in, and it heads for the lowest spot it can find. On ground like that, a gravel surface should never be the low point of a yard.^[2]

The Greensboro WTP station also records 63 days a year when the low reaches 32 F or colder. Freezing nights on wet ground can lift poorly drained stone, which is one more reason to keep water moving out of a base.^[1]

April 1 is the median last spring freeze at that station. November 4 is its median first fall freeze.^[1]

Gutters and downspouts matter on slow-draining ground. Carry roof water a few feet out from the house with an extension, and let it spill onto a pad of River Rock or into a dry well filled with #57 Crushed Stone, where it can seep away at its own pace.^[1],[2]

Piedmont loam and the rock beneath it

The survey maps the center point in the Mecklenburg-Urban land complex, 2 to 10 percent slopes. About 30 percent of that map unit is urban land, paved or built over, and Mecklenburg soil makes up 50 percent of it.^[2]

Mecklenburg is a loam at that point, with a moderate shrink-swell rating of 5 percent. Soil with that rating swells when wet and shrinks when it dries, enough to shift a thin slab or a poorly built walk over a few seasons. A compacted stone base cushions that movement and spreads it out, so pavers and gravel ride on top without cracking.^[2]

Underneath the soil, the USGS geologic map shows Metamorphosed Granitic Rock, a metagranite from the Cryogenian. Hard crystalline rock like that weathers slowly into the clayey subsoil found across much of the Piedmont, and it can sit close enough to the surface to stop a post-hole digger.^[3]

The ground at the ZIP's center point stands 820 feet above sea level.^[4]

Building a walk or drive on a gentle slope

The mapped slopes run from 2 to 10 percent, so many driveways here climb or fall a little from the street. On a slope, water wants to run straight down the gravel and carry the surface stone with it. Cut a shallow swale or a stone-filled trench across the drive near the top to turn the water aside before it picks up speed.^[2]

Dig out the topsoil and any soft loam until you reach firm subsoil. Lay a fabric over it, since loam with some clay in it can pump fines up into the stone when it is wet. Then compact Road Base in lifts, checking that each lift is firm before the next goes down, and finish with #57 Crushed Stone or Driveway Gravel. A crowned surface with a slight peak down the middle sheds rain to both sides.^[2]

Along the low edge, lay Drain Rock in a trench lined with fabric. With slow infiltration and heavy yearly rain, that trench gives the runoff a place to collect and seep away from the drive.^[1],[2]

Beds and lawns on slow-draining soil

Loam with slow infiltration rewards raised planting. Build beds a few inches above the surrounding grade with Garden Soil, or blend Topsoil with Compost, so roots sit above the wettest layer after a storm. Mixing Compost into the top of the existing loam also opens it up and helps water soak in.^[2]

Spread Brown Shredded Mulch or Black Shredded Mulch after the last spring freeze has passed, a few inches deep. Mulch holds soil moisture in summer and softens the swings in soil temperature on freezing nights, and it keeps hard rain from splashing soil onto siding.^[1]

For a downspout that dumps water into a bed, a splash pad of River Rock spreads the flow and stops it from carving a trench.^[1]

Fill, backfill, compost and garden paths

Backfill around a new wall or a foundation repair should drain, not hold water against the structure. Use #57 Crushed Stone or Drain Rock right behind the wall, wrapped in fabric, and save the loam you dug out for the top few inches where grass will grow. Native soil with a moderate shrink-swell rating pushes on a wall as it wets, while clean stone stays where you put it.^[2]

To raise a low spot in the yard, Fill Dirt is the sensible choice, packed down in thin layers. Finish the top with Topsoil so grass or plants can root. Where a soggy patch keeps coming back after rain, raising it alone may not fix it, and a shallow trench of Drain Rock leading to lower ground deals with the source.^[2]

Compost improves Piedmont loam year by year. Worked into the top layer of a bed, it loosens the soil, helps rain soak in instead of running off, and feeds the soil life that keeps it open. A yearly top dressing, followed by mulch, builds better soil season after season.^[1],[2]

Garden paths on a slope need stone that stays in place. #89 Crushed Stone and 3/8" Crushed Stone pack into a firm walking surface and do not roll the way Pea Gravel can on a grade. Set timber or stone steps where the path climbs steeply, and fill the treads with Walkway Gravel.^[2],[3]

Freezing nights loosen a path a little every winter. A quick rake and a top-up of fresh stone each spring keeps the surface even. Where a path crosses a wet spot, lift it on a layer of #57 Crushed Stone so water can flow under it instead of across it.^[1],[2]

Homes near downtown Greensboro

The Census Bureau's survey counts 9,444 housing units in ZIP 27401, and 48 percent of them are detached single-family houses.^[5]

Greensboro as a whole has 135,665 housing units, 52 percent of them detached. The city's median home was built in 1985.^[5]

In the ZIP, the median home dates to 1973, and owners occupy 36 percent of the homes that are lived in. A mix of older houses and apartments means jobs here range from a whole driveway rebuild to a few tons of stone for a walk.^[5]

The North Carolina Department of Transportation calls the layer under its pavements Aggregate Base Course and covers it in Section 520 of its Standard Specifications for Roads and Structures, dated January 2024.^[6]