Gravel, Stone, Fill and Mulch Delivery in Greenville, NC

Roanoke silt loam on wet, flat ground

The USDA soil survey maps Roanoke silt loam at the ZIP's center point, and the Roanoke series makes up 85 percent of that map unit. The top mineral layer is listed as loam. Roanoke soils form on low, flat ground near streams, where fine sediment settles out of slow water.^[1]

The survey rates the Roanoke soil poorly drained and puts it in hydrologic group C/D. That split rating means it acts like group D, with very little water soaking in, while the water table is high, and like group C, with slow infiltration, where the ground has been drained. Either way, water moves into this soil slowly, and puddles can stand for a long time after a storm.^[1]

Shrink-swell is moderate, at 4.5 percent. The ground swells a little when soaked and shrinks back as it dries, enough to shift a paver edge or crack a thin slab over time, so a flexible gravel base is a good fit.^[1]

Yorktown and Duplin formations below

The state geologic map shows the Yorktown Formation and Duplin Formation, Undivided, under the center point. Those Tertiary beds are made of clay, sand, marl and limestone, laid down when the sea covered this part of the state.^[2]

Marl is a crumbly, limy clay, and its layers, along with the clay beds, slow water moving down through the ground. That helps explain why the soil on top stays wet. A deep hole dug near the center point may pass through sandy beds and shell-rich marl in a short distance.^[1],[2]

Marl spoil from a deep trench is sticky when wet and crumbly when dry, much like a heavy clay. Spread it thin on a lawn area or haul it away rather than packing it back around a drain pipe, where it would slow the water you are trying to move.^[1],[2]

The ground at the center point stands 30 feet above sea level. On low, flat land, building up the grade around a drive or a house is the simplest way to keep water moving away from it.^[3]

Heavy rain at the Greenville station

Weather normals come from the NOAA station at Greenville, NC, about 2 miles away. It averages 53.4 inches of precipitation and 3.3 inches of snow a year. Much of that rain comes in strong summer storms and tropical systems, which can drop a lot of water on poorly drained ground in a single day.^[4]

The Greenville station counts 54 days a year with a low of 32 F or colder. Wet silt loam that freezes overnight can lift slightly and then settle as it thaws, so a base here benefits from staying dry.^[4]

The station's median last spring freeze is March 27, and its median first fall freeze is November 8. Spring beds go in after late March, and the fall window is a good time for shrubs and trees while the soil is still warm.^[4]

A raised, well-drained gravel drive

On poorly drained loam, a gravel drive that sits level with the lawn will stay soft much of the year. The fix is to raise it. Strip the topsoil, shape the subgrade with a crown and lay woven fabric over the whole footprint so the silty soil cannot mix into the stone.^[1]

Build up the drive with compacted Fill Sand if the area needs raising, then add compacted Road Base or Crushed Concrete in lifts on top. With the ground at the center point standing only 30 feet above sea level and water slow to soak in, a drive that sits a few inches higher than the yard drains far better.^[1],[3]

Top the drive with 3/4" Crushed Stone, #57 Crushed Stone or Driveway Gravel. Dig a shallow ditch or a Drain Rock trench along the lower side to carry storm water to the street or a swale. After big storms, rake washed stone back into place before small dips turn into ruts.^[1],[4]

Beds, drainage and foundation stone

Plant roots dislike sitting in water, and on poorly drained Roanoke soil, the ground can stay wet for days. Raised beds filled with Garden Soil, or Topsoil blended with Compost, lift roots above the wettest layer. Mound new shrub beds slightly above the lawn so rain runs off them.^[1]

A French drain made of perforated pipe in Drain Rock, wrapped in fabric, carries water away from a soggy corner or a downspout. At its outlet, a pad of River Rock or Riprap slows the flow so it does not cut into the lawn.^[1],[4]

Mulch beds with Brown Shredded Mulch, Black Shredded Mulch or Red Mulch, keeping it a few inches deep so the surface can dry between storms. A fresh layer after the median first fall freeze of November 8 protects roots through the cold months.^[4]

Fill Sand against Fill Dirt for a low lot

Raising part of a lot is a common fix on poorly drained Roanoke ground, and the first decision is what to raise it with. Fill Sand and Fill Dirt look similar on a delivery ticket, yet they act very differently once spread over wet loam.^[1]

Fill Sand is clean and coarse enough that water drains through it. It compacts well in thin layers with a plate, and it will not turn to mud when the 53.4 inches of yearly rain at the Greenville station soaks the site. That makes it the right fill under a drive, a shed pad or a patio. Fill Dirt carries more silt and clay, so it holds its shape on a mound and supports grass, but it drains slowly, much like the loam already in place.^[1],[4]

A sensible plan for a low back yard is Fill Sand under anything that carries weight and Fill Dirt topped with Topsoil where grass or shrubs will grow. On flat ground standing 30 feet above sea level at the survey point, grade both so they fall gently away from the house.^[1],[3]

Housing in ZIP 27834 and the NCDOT base spec

The Census counts 27,711 housing units in ZIP 27834. Detached single-family houses make up 34 percent of them, and owners live in 37 percent of the occupied homes.^[5]

Greenville as a whole holds 45,767 housing units, and 32 percent are detached houses. The median build year is 1996 in the ZIP and across the city. With many apartments and rentals in the ZIP, a lot of projects are small: mulch for common beds, stone for a parking strip, or Playground Sand for a shared play area.^[5]

For owners in the ZIP planning a first project, start small: one bed refreshed with Garden Soil and Brown Shredded Mulch, or one wet corner fixed with a short Drain Rock trench. Watching how those spots behave through a season of rain shows where larger work is worth doing.^[5]

The North Carolina Department of Transportation specifies Aggregate Base Course in Section 520 of its Standard Specifications for Roads and Structures (January 2024). That section covers the compacted stone layer placed under state roads.^[6]