Gravel, Stone and Soil Delivery in Southaven, MS

Collins and Falaya silt loams

At the center point of ZIP 38671, the USDA soil survey maps Collins and Falaya silt loams, local alluvium phases. Collins is the main series and covers 50 percent of the unit. The top mineral layer is silt loam.^[1]

Local alluvium means soil washed in from the nearby slopes and laid down in low areas and along small streams. Ground built this way is soft and deep, with very few stones. It is easy to dig and good for plants, and it turns sticky and slick when soaked.^[1]

Because the soil is so even, the main changes across a yard come from how each part was used and built on. A path packed by years of foot traffic, a strip beside the street that took fill during building, or a corner where the gutter empties can each behave very differently from the open lawn. A test hole at the spot you plan to build on is still the best guide.^[1]

Collins is rated moderately well drained and sits in hydrologic group B, with moderate infiltration. Shrink-swell in the top meter is low, at 1.5 percent. The silt will not crack and heave much, but it gives a weak footing for stone once wet.^[1]

Sand and clay of the Kosciusko formation

Below the soil, the state geologic map shows the Kosciusko formation, an Eocene unit of sand, clay and quartzite.^[2]

Most yard projects stay in the silt loam on top and never touch that older layer. A deep trench may pass from silt into sandier or clayier beds, and the change can affect how fast water drains from the bottom of the cut. The ground at the center point stands 270 feet above sea level.^[2],[3]

Quartzite in that formation is hard and dense, and you may find a few rounded pieces of it in a deep cut. They do not change much about a home project. The silt on top sets the rules for nearly every drive, patio and bed.^[2]

Memphis rain and freeze dates

Weather figures here come from the NOAA normals station Memphis Intl AP, TN, about 7 miles away. It averages 54.9 inches of precipitation and 2.7 inches of snow a year.^[4]

The station counts 44 days a year with a low of 32 F or colder. Its median last spring freeze is March 16, and its median first fall freeze is November 16.^[4]

Rain shapes most gravel work in this area. A wet year near 54.9 inches, often with heavy spring storms, keeps silt soft for weeks at a time. Any surface that carries cars needs a stone layer strong enough to bridge soft ground, and edges that let water leave fast.^[1],[4]

Light snow and brief freezes cause less trouble, though a cold snap after heavy rain can loosen the top of a drive.^[4]

Late summer and fall are often the best months to build on this ground. The silt has dried out after the spring rains, the subgrade compacts well, and the new base has time to settle before winter storms. A base laid in a wet spring can still work, but plan for more drying time between layers.^[4]

A driveway that bridges soft silt

Start by stripping the topsoil and any loose silt. Grade the subgrade so it falls away from the house and toward a ditch or the street. Then lay a woven geotextile across the full width. On silt loam this step matters most, because it stops the soil and the stone from mixing.^[1]

Spread a first layer of 1-1/2" Crushed Gravel or #4 Crushed Stone over the fabric. The large, angular pieces lock together and spread the weight of a car over more of the soft soil. Compact it, then add Road Base in thin lifts and pack each one.^[1]

Finish with Driveway Gravel or #57 Crushed Stone. Shape the top with a crown so rain runs to both edges, and keep the edges lower than the drive. A drive that stays dry underneath stays firm, even on soil that turns soft in the wet season.^[1]

For a shop yard or a turnaround that sees heavy trucks, Railroad Ballast or Crushed Concrete under the Road Base adds strength.^[1]

Old drives that have sunk into the silt over the years usually lack fabric. Rather than piling new stone on top, scrape off the mixed mud and stone, lay fabric over the firm soil below, and rebuild with a coarse layer and Road Base. That one change can end years of patching.^[1]

Drainage, beds and play areas

Low spots in silt yards hold water after storms. A French drain, built with fabric, a perforated pipe and #57 Crushed Stone or Drain Rock, collects that water and leads it to a lower outlet. In a long, flat yard, keep the trench falling the whole way.^[1]

Silt loam is good garden soil. Beds need only Compost worked into the top and a layer of Brown Shredded Mulch, Black Shredded Mulch or Red Mulch to hold moisture and stop rain from crusting the surface. Raised beds of Garden Soil help where water stands.^[1]

Under swings and slides, Playground Sand, Pea Gravel and Wood Chips are common choices. Put a layer of open stone under the play surface on silt, so it dries out faster after rain.^[1]

Around the house, a strip of River Rock under the drip line keeps rain from splashing silt onto the siding.^[1]

For a level gravel patio, Pea Gravel or 3/8" Crushed Stone over a packed base of Road Base gives a quick-draining alternative to pavers. Edge it well, and keep the stone layer fairly thin so chairs do not sink.^[1]

Homes in ZIP 38671 and across Southaven

The Census counts 15,918 housing units in ZIP 38671. Detached single-family houses make up 74 percent of them, the median home was built in 1992, and owners live in 64 percent of the occupied homes.^[5]

Across Southaven, the Census counts 23,046 housing units. Of those, 80 percent are detached houses, and the median build year is 1998.^[5]

With most homes on their own lots, the typical jobs are side drives, parking pads for a boat or a trailer, stone borders and bed refreshes. Gravel Valet delivers the amount each job needs.^[5]

Lots built in the last few decades often have a layer of graded subsoil and builder fill under the lawn. That fill can be firmer or softer than the native silt, and it may hold construction debris. Dig a test hole at the spot where a drive or a patio will go, and adjust the plan if the hole shows mixed fill.^[5]