Gravel, Stone and Garden Soil Delivery in Lafayette, LA

Silt loam on the Prairie Terraces

At the ZIP's center point, the USDA soil survey maps Memphis silt loam, 0 to 1 percent slopes. The Memphis series makes up about 90 percent of that map unit. It is rated well drained, with hydrologic group B, which means moderate infiltration: rain soaks in at a steady pace instead of racing off or ponding for days. The texture is silt loam, and its shrink-swell rating is low, at 2.3 percent. Put simply, the soil does not heave much as it wets and dries, so it makes a cooperative base for gravel once it is compacted.^[1]

Silt has one weakness. When it is wet and churned by tires or boots, it turns slick and loses strength fast. That is why fabric under a base layer is worth adding on silty ground, even when it drains well. Beneath the soil, the state geologic map shows the Prairie Terraces, a Pleistocene deposit of clay, silt, sand and gravel laid down by ancient rivers. The ground at the center point sits close to 40 feet above sea level, so the land is low and gentle, with little natural fall to carry water away.^[1],[2],[3]

The low shrink-swell rating sets this soil apart from the heavy clays that cover other parts of the Gulf Coast. Clay that swells after rain and cracks in drought can tilt pavers and split thin slabs. At 2.3 percent, the movement at the center point is small, so the main worries are water and soft spots rather than seasonal heaving.^[1]

Heavy rain and very few frosts

Lafayette RGNL AP, about 2 miles from the center point, is the closest NOAA normals station. It averages 62.8 inches of precipitation a year, a large amount of water by any measure, and much of it can fall in short, hard bursts. That is the number to design around. Every gravel surface needs a slope, every bed needs a way to shed excess water, and low corners of a yard deserve a look after a big storm before you decide where stone should go.^[4]

Freezes are rare. The same station records about 11 days a year with a low of 32 F or colder. Its median last freeze in spring comes around February 13, and the median first freeze in fall around December 4. Frost heave is a minor concern next to rain, so the focus shifts to keeping water moving and keeping fine soil out of drainage stone.^[4]

Building a driveway on silty ground

A good drive on silt loam starts by stripping grass and roots, shaping a slight crown, and compacting the soil while it is moist but not soggy. Roll out a woven fabric next. It keeps the silt from pumping up into the stone when trucks and cars press down on wet days. Then spread Road Base or 1-1/2" Crushed Gravel in lifts, compacting each one. A deeper base holds up on soft ground after a week of rain.^[1],[4]

For the surface, Driveway Gravel or #57 Crushed Stone gives a clean top that drains through quickly. Crushed Concrete is a solid alternative for the base layer. Run a shallow swale or a stone-lined ditch along the low side so water from the drive has somewhere to go. The state transportation agency names Base Course Aggregates, Stone, under Section 302 Class II Base Course in its Louisiana Standard Specifications for Roads and Bridges (2026) for the stone layer under its pavements.^[3],[5]

Edge the drive with a buried timber or a steel strip on the low side. On flat ground with heavy rain, an edge keeps the base from spreading and keeps the surface stone where the tires need it.^[4]

Homes in ZIP 70501

The Census Bureau puts the number of housing units in ZIP 70501 at about 12,747. Detached single-family houses make up 72 percent of them. Owners live in 41 percent of occupied homes, and the median home was built in 1971.^[6]

Lafayette as a city counts about 59,363 housing units, with detached houses at 63 percent. The citywide median year built is 1981, a decade newer than this ZIP. A neighborhood of mostly detached houses means a lot of driveways, side yards and garden beds, and that is where most bulk orders end up: a fresh layer on a worn drive, a patio extension, or new soil for a vegetable garden.^[6]

Detached houses on their own lots tend to come with a running list of outdoor jobs: a driveway apron worn thin, a backyard that holds water, a patio that never got built. Plan the order of work so drainage comes first, then base, then surface stone and beds. Doing it in that sequence means nothing finished has to be dug up again.^[6]

Keeping water off patios and away from walls

With 62.8 inches of yearly precipitation at the airport gauge, drainage work is almost always part of a project. A French drain filled with Drain Rock or #57 Crushed Stone around a perforated pipe can move water from a soggy corner to the street or a swale. Wrap the stone in fabric so silt does not clog it over time. Riprap lines the outlet of a ditch or a steep swale, where fast water would otherwise carve out the soil.^[1],[4]

Under a paver patio, build compacted Road Base and finish with a thin bed of Concrete Sand to set the pavers on. Pitch the patio slightly away from the house. Because the soil drains well and shrinks and swells little, a properly compacted base on this ground stays flat for years.^[1]

Where a yard falls toward the house, regrade with Fill Dirt to restore a gentle slope away from the walls before adding stone. Pack each layer as you spread it. Loose fill settles, and a low spot beside a foundation is where water gathers on flat, low ground like this.^[1],[3]

A long season for beds and gardens

With a median last freeze around February 13 at the station, gardeners here can plant early and keep beds producing late in the year. Silt loam holds water and nutrients well, but it can crust after a downpour. Working in Compost loosens it and adds organic matter. For new beds, a few inches of Garden Soil or Topsoil over the native ground gives roots an easy start.^[1],[4]

Mulch does two jobs in this climate. Brown Shredded Mulch or Red Mulch shades the soil through hot weather and breaks the force of heavy rain, so the surface stays loose instead of sealing over. Refresh it once or twice a year, since warm, wet conditions break mulch down quickly.^[4]

With only about 11 freezing nights a year at the station, vegetable beds can stay in use for most of the calendar. Between crops, spread a fresh inch of Compost and turn it in lightly. Over a few seasons that habit darkens the silt loam, improves its crumb and makes it easier to dig after rain.^[1],[4]