Dirt Work in Dallas, TX

Building Pads on Dallas County's Black Clay

Dallas County covers about 902 square miles, and the federal soil survey sorts it into seven soil groups. Deep clay on the uplands, led by the Houston Black and Heiden soils, covers about 29 percent of the county. Austin and Houston Black clay over the Austin Chalk adds about 14 percent. Trinity and Frio clay on the river floodplains makes up another 19 percent.

The soil survey calls Houston Black very slowly permeable with high shrink-swell potential. In a dry spell it opens cracks 1/2 inch to 4 inches wide a foot below the surface. DFW Airport averages about 37 inches of rain a year, with May and October the wettest months. Rain soaks in slowly, and a wet pad takes time to dry back to the moisture the compactor needs.

Over the Austin Chalk, the survey maps Eddy, Stephen and Austin soils on about a fifth of the county. Some are only inches deep, so a cut there hits rock fast. A Dallas pad starts with the geotechnical report. Our site preparation follows it: cut and fill to the plan grades, then compaction in tested lifts.

Data Center Site Work on the Dallas Side of the Metro

Industry market reports in 2026 rank Dallas-Fort Worth third among the primary data center markets in the United States. By the middle of the year the metro had more than 1,400 megawatts of data center capacity built. More than 765 megawatts were under construction, and most of that space was leased before it was finished.

A data center campus is a dirt work job before it is anything else. The state's own tax rules set a qualifying data center at 100,000 square feet of building or more. Pads at that scale need clearing, cut and fill, tested compaction and access roads built for heavy loads. Conduit trenches cross the whole site, and the site drainage has to hold what a big roof sheds.

Bankston's Builders does that site work with heavy equipment our crews know well: excavators, dozers, skid steers and a compactor. Access roads come first so the trucks can reach the pads. The pads, the trenches and the drainage then follow the campus plan. Once the dirt is done, the structure and the finish out can run with the same company.

What Does the City of Dallas Require Before Dirt Moves?

Permits in Dallas run through the Planning and Development department and its Permitting and Inspections division, on the DallasNow portal. A commercial building permit covers constructing, altering or renovating a commercial property, and that includes a tenant finish out. The city's development guide also lists separate permits for excavation and for paving and grading.

The city's tree survey rules treat most trees eight inches or more across at chest height as protected. A tree survey can be required with a plat, a zoning change or a building permit. The city can also ask for one when a lot is graded. City arborists review it, and tree removal has its own permit.

Along the Trinity River and the creeks, the Dallas Development Code controls the floodplain. Fill, excavation or other development there needs a fill permit or floodplain alteration permit from the director of water utilities. Under a fill permit the whole building pad rises at least two feet above the design flood elevation. The fill is compacted to 95 percent standard Proctor density, and the city says the permit process averages four months.

Sites that disturb one acre or more also need construction stormwater permit coverage from TCEQ. Texas law requires a Texas 811 locate request at least 48 hours before mechanized digging 16 inches or deeper. Weekends and holidays do not count toward that window. The permit applications belong to the owner and the engineer, and we build to the approved plans.

From the Escarpment Zone to the Great Trinity Forest

South of Interstate 30 in southwest Dallas, the Austin Chalk meets the Eagle Ford shale along the White Rock Escarpment. The Dallas Development Code draws an escarpment zone along that line and bars excavation, filling and tree removal inside it. On the similar slopes around it, an escarpment permit comes first. That permit needs a slope stability analysis, an erosion control plan and a grading plan signed by an engineer.

North and east of downtown the ground flattens out. Uptown, the Design District and the Stemmons corridor along Interstate 35E are built-up commercial ground. Far North Dallas, Preston Hollow and Lake Highlands fill the north side of the city. Pleasant Grove runs toward the Great Trinity Forest to the southeast.

The Dallas Floodway holds 23 miles of levees, completed in 1932 and upgraded by the Army Corps in the 1950s. They protect 51 square miles of watershed through downtown. Southeast of downtown, the Great Trinity Forest covers about 6,000 acres along eleven miles of river, past Interstate 20. Land near the river is floodplain, so the fill permit rules above shape every pad there.