Gravel, Stone and Soil Delivery in Jacksonville, NC

Grifton soil and a high water table

At the center point of ZIP 28540 the USDA soil survey maps Grifton fine sandy loam. Grifton is the main series, at 80 percent of the unit, and its top mineral layer is fine sandy loam.^[1]

The survey rates Grifton poorly drained. On a coastal plain soil, that rating usually points to water standing close to the surface for long parts of the year. Low spots fill after rain, and a hole dug in a wet month may start to fill from the sides.^[1]

Grifton carries hydrologic group B/D. In wet months, while the water table is up, the soil sheds rain like group D, the slowest class. Where ditches or tile have lowered the water table, it takes rain at the moderate rate of group B. The difference between a drained lot and an undrained one can be large.^[1]

You can often tell which kind of lot you have by watching it after a long rain. If water clears from the yard within a day, the ditches around it are doing their work. If puddles linger for several days, plan on raised work and extra drainage for every stone project.^[1]

Shrink-swell in the top meter is low, at 1.5 percent, so the soil itself moves very little. Every plan below starts by lifting the work and giving water a way out.^[1]

Limestone of the River Bend Formation

Under the center point, the state geologic map shows the River Bend Formation, a Tertiary unit of limestone and calcarenite. Calcarenite is limestone built from sand-sized grains of shell and lime.^[2]

On most home lots that rock sits below the sandy soil and does not come into play. Shell fragments in a deep trench are a sign that the hole has reached the top of it. The ground at the center point is only 30 feet above sea level, which fits a low coastal plain setting.^[2],[3]

Heavy rain at the New River station

The NOAA normals station used for Jacksonville is New River Mcaf, NC, about 7 miles away. It averages 56.5 inches of precipitation a year and 0.6 inches of snow.^[4]

That station counts 43 days a year with a low of 32 F or colder. Its median last spring freeze is March 23. Its median first fall freeze is November 16.^[4]

Rain is the force to plan for. A yearly total of 56.5 inches on poorly drained soil means low parts of a yard can stay wet for days. Coastal storms can drop a large share of a month's rain in one event, so ditches and stone trenches need room for a sudden flow.^[1],[4]

Cold is a lesser concern. Most freezes near the coast are light and short, though a wet base that freezes on a clear winter night can still soften the next morning.^[4]

Summer is the season for big storms here, and it is also the season when most people want to build a patio or a drive. Order the stone for a dry stretch, compact each layer before the next rain, and keep a tarp handy for any Fill Sand or Topsoil left in a pile overnight.^[4]

Lifting a driveway out of the wet

On Grifton ground, start a drive by raising it. Strip the topsoil, then spread Fill Dirt or Fill Sand and compact it in thin lifts until the subgrade stands above the yard around it. Even a modest rise keeps the base out of standing water after a storm.^[1]

Cover the raised subgrade with a woven geotextile. Fine sandy loam turns soft when it is soaked, and the fabric keeps it from pumping up into the stone. Then lay a coarse layer of 1-1/2" Crushed Gravel or #4 Crushed Stone, which drains and spreads the load.^[1]

Over that, add Road Base in compacted layers and finish with Driveway Gravel or #57 Crushed Stone. Shape the top with a crown so rain runs off both sides into shallow ditches. If water crosses the drive in a storm, set a culvert or a stone-filled trench at the low point.^[4]

Crushed Concrete makes a good alternative for the base layer, and Asphalt Millings make a firm, dark top that sheds water well on a crowned drive.^[4]

Sand blows and washes onto drives near the coast, and a thin layer of it on top of the stone fills the gaps and holds water. Sweep or rake it off after storms, and keep the shoulders of the drive planted or mulched so loose sand stays in the yard.^[1]

French drains, dry wells and wet yards

A French drain only works if the water has somewhere lower to go. On flat coastal ground, find the outlet first, such as a ditch, a swale or the street, then dig back from it toward the wet spot, keeping a steady fall. Line the trench with fabric, set a perforated pipe, and fill around it with Drain Rock or #57 Crushed Stone.^[1]

Dry wells are less useful on soil with a high water table. A pit full of stone in wet Grifton ground may already be full of groundwater when the storm arrives. Ditches and swales that carry water away tend to do better.^[1]

Downspouts deserve their own splash pads. A bed of River Rock under each one spreads roof water and stops it from digging a hole beside the foundation. Where the gutters dump a lot of water, a buried line can carry it to a ditch.^[4]

Rain gardens can help on the higher parts of a lot. A shallow, planted basin of Garden Soil mixed with Compost catches roof water and lets it soak in slowly. On poorly drained ground, keep it shallow and well away from the house, and give it an overflow path for the biggest storms.^[4]

Beds and homes in ZIP 28540

Many garden plants dislike wet roots. Raise beds well above the native soil with Garden Soil, or a blend of Topsoil and Compost, and edge them with stone or timber. Cover them with Brown Shredded Mulch or Red Mulch, which knit together and stay put when rain runs across the yard.^[1]

The Census counts 21,131 housing units in ZIP 28540. Detached single-family houses make up 68 percent of them, the median build year is 1986, and owners live in 62 percent of the occupied homes.^[5]

For Jacksonville as a whole, the Census counts 25,417 housing units. Just 49 percent of them are detached houses, and the town's median build year is 1992.^[5]

The North Carolina Department of Transportation sets out Aggregate Base Course for the layer under its roads in Section 520 of the Standard Specifications for Roads and Structures (January 2024).^[6]