Gravel Delivery in Texas

Soft, lime rich rock runs under the cities of central and north Texas. The state geologic map shows marlstone, chalk and claystone at both the Dallas and the Austin center points. Fort Worth's center point maps limestone, marl and clay. Marl is a crumbly mix of lime and clay, and chalk is a soft, white limestone. Marl and chalk weather into heavy, sticky soil.^[1]

Harder limestone beds give the angular crushed stone used across the region. Crushed limestone is pale, packs tight and makes plenty of fine dust that binds a layer. Softer chalk and marl break down too fast for a long lasting surface, so stone for a drive comes from the firmer rock.^[1]

Arlington's center point reads sandstone mudstone, layered rock of sand and mud. Toward the coast the rock gives way to young, loose deposits. The Houston center point maps clay and silt, and the Corpus Christi center point maps sand and fine alluvium. Ground like that has no hard rock near the surface, so stone for coastal jobs is hauled in, while sand and silt are close at hand.^[1]

Far west, El Paso's center point shows coarse alluvium and fine alluvium, the sand, gravel and silt that water carries off the mountains in a dry land. Pits in deposits like that yield round gravel and sand in many colors, and the larger cobbles can be crushed into sharp stone.^[1]

The USDA soil survey shows the same spread at the surface. The San Antonio center point reads clay, moderately well drained. Fort Worth's shows gravelly clay loam, well drained, and Arlington's shows fine sandy loam, moderately well drained. El Paso's center point reads very gravelly loam, well drained.^[2]

The Texas Department of Transportation calls its rules for the stone layer under its roads Flexible Base, Item 247, in the 2024 Standard Specifications for Construction and Maintenance of Highways, Streets, and Bridges.^[3]

Clay is the main thing a Texas buyer has to plan for. Clay ground swells when it is wet and shrinks and cracks when it dries. A base laid straight on it can heave and sink. Geotextile fabric and a thick, compacted layer of angular stone spread the load and keep the clay out of the gravel.^[1],[2]

Rain varies more across Texas than in most states. The weather station used for Houston averages 54.1 inches of precipitation a year. The Dallas station logs 38.3 inches, Austin's and Arlington's each 36.2 inches, Fort Worth's 35.3 inches and San Antonio's 34.0 inches. Corpus Christi's station averages 30.9 inches, and El Paso's only 8.8 inches.^[4]

Wet clay is the main access problem. Black clay that is hard as brick in a dry spell turns to deep, slick mud after a storm, and a loaded truck can sink to its axles on a lawn. After heavy rain, plan the drop for pavement or an existing gravel pad, or wait for the ground to firm up.^[2],[4]

Freezes are few in most of the state. The Fort Worth station counts 33 days a year at 32 F or colder, and the Arlington station 36 days. Dallas's station logs 23 days, San Antonio's 22 days, Austin's 12 days, Houston's 5 days and Corpus Christi's 4 days. El Paso's station records 42 days. Snow is rare: the El Paso station averages 2.8 inches a year, Dallas's 1.7 inches, and Houston's 0.0 inches.^[4]

An ice storm can still close roads for a day or two in north Texas, and a frozen drive is slick under a heavy truck. Most winter deliveries go ahead as planned. Heat is the bigger concern in summer for the crew spreading the load, so an early start helps.^[4]

Pick a firm, open spot. The dump bed rises high as it tips, so keep it clear of power lines, trees and carports. Hill Country lots west of Austin can be steep and rocky, and the ground at the Austin center point stands 490 feet above sea level, one reading among many on hilly land. Tell Gravel Valet about any gate, cattle guard, low culvert or soft shoulder on the way in.^[5]

Clay ground shapes most driveway work. On the clay read at the San Antonio center point, strip the top layer, lay a woven fabric and build a thick, compacted layer of Road Base or Crushed Concrete. Finish with Driveway Gravel or 3/4" Crushed Stone. Crown the drive so water runs off to the sides and does not soak into the clay under it. Asphalt Millings make another firm, dark surface for a rural drive.^[2]

Drainage matters most near the coast. With yearly precipitation of 54.1 inches at the Houston station, on clay and silt ground that holds water, a yard can stay soggy for days. A French drain with perforated pipe in Drain Rock or #57 Crushed Stone moves water away from a slab. A dry creek bed of River Rock edged with Riprap carries storm water through a yard.^[1],[4]

Rock yards and xeriscape suit the west. With 8.8 inches of yearly precipitation at the El Paso station, many buyers replace grass with Decomposed Granite, River Rock or Pea Gravel over weed fabric. The well drained, very gravelly loam at the El Paso center point is firm ground for a packed Decomposed Granite path or patio.^[2],[4]

Patios and walks need a stable base on shifting soil. Pack a layer of Road Base, then set pavers in Concrete Sand or Stone Dust Screenings. For a gravel patio, 3/8" Crushed Stone or Walkway Gravel packs firmer than round stone. On the fine sandy loam at the Arlington center point, the base sits on lighter, more even ground than on clay.^[2]

Garden beds on clay need help. Build the bed up with Garden Soil or Topsoil mixed with Compost, and cover it with Brown Shredded Mulch, Black Shredded Mulch or Red Mulch to keep roots cool in summer heat. On the gravelly clay loam at the Fort Worth center point, loosen the ground under the bed before adding soil. Fill Dirt and Fill Sand handle grading and low spots, and Playground Sand or Wood Chips go under swings.^[2]

Mesquite, Garland, Plano, Frisco and the other cities around Dallas and Fort Worth share many of the same jobs: a wider drive for a second car, a pad for a trailer, a side yard path. On the gravelly clay loam read at the Fort Worth center point, the ground holds some stone already, which helps a base set up. Keep the finished surface a little above the lawn so runoff from the next storm passes by instead of across it.^[2]