Gravel, Stone and Mulch Delivery in Concord, NC

Floodplain loam over granite

The USDA soil survey maps Chewacla sandy loam, 0 to 2 percent slopes, frequently flooded, at the ZIP's center point. The Chewacla series makes up 85 percent of the map unit, and its top mineral layer is loam. The words frequently flooded in the map unit name describe ground beside a stream, where high water spreads out after heavy rain.^[1]

The survey rates the soil somewhat poorly drained and gives it hydrologic group B/D. It behaves like group D, very slow intake, while the water table is high, and like group B, moderate intake, where the ground has been drained. After a wet week, water can sit close to the surface and the next rain runs straight off.^[1]

Shrink-swell in the top 100 cm rates low, at 1.5 percent, so the ground barely moves as it wets and dries. Soft, saturated soil under a load is the problem to plan around, more than any swelling. A loaded truck backing across a wet lawn on this kind of ground leaves deep ruts, so plan deliveries and heavy work for a dry spell, and lay plywood or a temporary stone path where machines must cross soft ground.^[1]

Below the soil, the geologic map shows the Granite of Salisbury Plutonic Suite, a Lochkovian granite. Granite weathers near the surface into coarse, sandy grains, and fresher rock can sit deeper down. A hole that starts in soft loam may end on gritty, broken granite.^[2]

Ground elevation at the center point measures 610 feet. On low, level floodplain ground, the best projects work with the water rather than against it, raising surfaces a little and giving runoff clear paths away from buildings.^[1],[3]

Rain, a little snow and a spring freeze

The NOAA station Concord, NC, about 4 miles away, provides the weather normals. It averages 47.9 inches of precipitation and 3.3 inches of snowfall a year. Rain is spread through every season, with heavy summer storms and soaking winter rains, so wet ground is a regular part of the year.^[4]

The station counts 74 days a year with a low of 32 F or colder. Its median last spring freeze comes on April 1. The median first fall freeze arrives on November 2. Frost seldom reaches deep, but a soaked base that freezes can lift a little and turn soft when it thaws.^[4]

Plant tender annuals and vegetables after the start of April, and cover or harvest them by early November. Fall suits shrubs and trees, since cooler weather and steady rain help roots settle in before spring.^[4]

The few snowy days each winter rarely bury a drive for long, but they matter on gravel. Plowing or shoveling fresh stone pushes it into the lawn, so set a blade high or use a shovel with a flat edge, and rake stray stone back once the snow melts.^[4]

A driveway that survives high water

On wet floodplain loam, height is the main defense. Build the drive a little higher than the yard around it so water runs off its edges instead of soaking in. Strip the topsoil, shape a crown, and compact the loam when it is damp rather than soaked.^[1]

Lay woven fabric across the full width. Start with a layer of #4 Crushed Stone or 1-1/2" Crushed Gravel, which bridges soft spots and keeps a path open for water. Compact Road Base in thin lifts over it, then finish with #57 Crushed Stone or Driveway Gravel.^[1]

Where a drive crosses a low swale, set a culvert big enough to carry storm flow and armor both ends with Riprap. Floodwater that spills over the top of a drive loosens small stone and carries it away, while Riprap at the inlet and outlet holds the banks in place.^[1],[4]

After any high water, walk the drive. Rake washed stone back into place, fill scoured spots with Road Base and compact them, then top up with fresh stone. A quick repair right after a flood stops a small washout from growing.^[1]

Beds and lawns on wet ground

Raised beds suit somewhat poorly drained soil. Build them above the lawn and fill them with Garden Soil or a mix of Topsoil and Compost, so roots sit above the wettest layer. In-ground beds need Compost worked into the loam to open it up.^[1]

Brown Shredded Mulch, Black Shredded Mulch and Red Mulch knit into a mat that stays in place through heavy rain. On ground that may flood, keep mulch away from the lowest spots, since floodwater can lift and carry it off. Use River Rock in those places instead.^[1],[4]

Soggy lawns benefit from a thin layer of Topsoil raked over the surface after core aeration. Where water always stands, a dry well filled with Drain Rock under the low spot gives it a place to go between storms.^[1]

River Rock or Riprap along a stream bank

Yards near a stream often need stone to protect a bank or line a channel. River Rock and Riprap do different jobs. River Rock is rounded and medium sized, good for lining a shallow dry creek bed, a rain garden edge or a gentle swale where water moves slowly.^[1]

Riprap is large, angular and heavy. Its rough pieces lock together and resist being moved by fast water, which makes it the choice for a steep bank, a ditch with strong flow or the end of a pipe. On frequently flooded ground, set Riprap on fabric so the soil behind it does not wash out between the stones.^[1]

Many banks need a mix. Riprap goes at the toe and along the outside of a bend, where the current hits hardest, while River Rock covers the gentler upper slope and the inside of the curve. Plant the top of the bank with deep-rooted grasses or shrubs, mulched with Brown Shredded Mulch, to hold the soil above the stone.^[1]

Homes in ZIP 28025

The Census counts 23,430 housing units in ZIP 28025. Detached single-family houses account for 77 percent of them, compared with 72 percent across Concord. Owners live in 69 percent of the ZIP's occupied homes. The median home in the ZIP was built in 1990, while the city median is 1998. Concord has 43,142 housing units in all.^[5]

On state roads, the North Carolina Department of Transportation calls for Aggregate Base Course under Section 520 of its Standard Specifications for Roads and Structures (January 2024). Private driveways need not follow it, but a dense, rolled stone layer under the surface works for the same reasons.^[6]

A high share of detached houses brings plenty of yard projects: a longer gravel driveway, a parking pad for a camper, Fill Dirt to raise a low corner, and fresh mulch around foundation beds each spring.^[5]