Fill Dirt Delivery & Export in Austin, TX
Central Texas geology doesn’t make it easy. Limestone shelves, caliche layers, and Hill Country terrain mean cut/fill balance is a bigger factor on every project. Soil Depot’s Austin team knows where to find clean fill when the rock says no, how to export your surplus dirt, and how to get material to your site without blowing the haul budget.
The Central Texas Soil Landscape
Austin sits on the Balcones Escarpment where the Hill Country meets the blackland prairie. West of I-35, you’re cutting through limestone and caliche. East of I-35, you’re dealing with expansive clay. Most sites need imported fill because what you dig out of the ground isn’t what the geotech report calls for.
The challenge in Central Texas is sourcing. Clean structural fill is harder to find here than in DFW or Houston. Borrow pits are fewer and farther apart, and the terrain makes haul routes longer. When a tech campus in Round Rock needs 25,000 CY of select fill and the closest source is a residential export site in Pflugerville, the margin between a profitable haul and a losing one comes down to route planning and truck scheduling.
Charlie’s team maintains a live inventory of active export sites across Travis, Williamson, and Hays counties. When material becomes available, we match it to open orders and move fast. In a market where supply is tight, speed is the difference between getting the material and watching it go to a competitor’s site.
Cut/Fill Balance Matters More Here
Hill Country topography means most grading plans involve significant cut and fill. Getting the balance right saves money. If your site is generating more cut than the plan can absorb, you need an export destination. If the plan calls for more fill than the cut produces, you need a source. We handle both sides and can model the logistics before the first truck rolls.
Materials We Deliver in Austin
Every load is sourced to spec and delivered in commercial volumes for contractors, civil crews, and developers across Central Texas.
Select Fill
Clean, compactable structural fill for building pads and load-bearing grade, sourced to your geotech PI and gradation spec, harder to find in Central Texas and worth getting right.
Common Fill
General-purpose fill dirt for bulk volume, elevation changes, and rough grading on Hill Country and prairie sites.
Fill Dirt
Bulk fill dirt delivered across the Austin metro for land leveling, backfill, and filling low areas where cut doesn’t balance the plan.
Topsoil
Screened topsoil delivery for finish grade, landscape areas, and erosion control once the structural work is done.
Sand & Base
Cushion sand, concrete sand, and aggregate base for bedding, sub-base, and utility work across Travis, Williamson, and Hays.
Road Base & Crushed Concrete
Flex base and recycled crushed concrete for drives, lay-down yards, and stabilized access on rocky Hill Country sites.
Dirt Export & Haul-Off in Austin
Hill Country grading generates spoils, and balancing cut and fill on rocky terrain is rarely clean. We export surplus dirt out of Austin job sites and route it to active fill destinations across Central Texas, so you aren’t paying to dump material that another site needs.
For operations exporting common fill or select material, we coordinate trucks, track daily counts, and match your spoils to open orders across Travis, Williamson, and Hays counties. One point of contact for both import and export keeps your earthwork moving and your cut/fill math working in your favor.
Export Dirt From Your SiteCommon Austin Applications
The projects we handle most across the Austin metro and Central Texas:
Areas We Serve Across Central Texas
We deliver fill dirt and soil, and run haul-off, throughout the Austin metro and Central Texas, including:
- Austin
- Round Rock
- Cedar Park
- Leander
- Georgetown
- Pflugerville
- Hutto
- Kyle
- Buda
- San Marcos
- Dripping Springs
- Lakeway
- Bee Cave
- Manor
- Liberty Hill
- Taylor
- Elgin
- Bastrop
The Science of Central Texas Soils
Austin straddles the Balcones Escarpment, the fault zone running roughly along I-35 that splits Central Texas into two very different ground conditions. West of I-35 sits the Edwards Plateau and Hill Country: shallow soils over Cretaceous limestone, with bedrock often just inches down. East of I-35 lies the Blackland Prairie and its deep, expansive smectitic clays. Both regimes push projects toward imported fill, rock and caliche to the west, high-plasticity clay to the east, which is why clean structural fill is genuinely harder to source here than in DFW or Houston.
| Soil series | USDA classification | Depth to bedrock / clay | Engineering behavior |
|---|---|---|---|
| Tarrant | Clayey-skeletal, smectitic, thermic Lithic Calciustolls | bedrock 6-20 in | Shallow over limestone; rock excavation common |
| Brackett | Loamy, carbonatic, thermic, shallow Typic Haplustepts | bedrock 5-20 in | Shallow residuum over Glen Rose / Comanche Peak limestone |
| Eckrant | Clayey-skeletal, smectitic, thermic Lithic Haplustolls | bedrock 4-20 in | Stony, shallow over Edwards limestone |
| Houston Black | Fine, smectitic, thermic Udic Haplusterts (Vertisol) | clay 40-60% | Deep expansive clay east of I-35; high shrink-swell |
Classifications per USDA-NRCS Official Soil Series Descriptions. Confirm parcel-specific properties with the USDA Web Soil Survey.
Why cut/fill balance is harder here
West of I-35, bedrock at 4-20 inches turns grading into rock excavation, and on-site spoils come up rocky and clayey rather than as clean engineered fill. East of I-35, native soils are high-plasticity expansive clays that don’t meet low-PI structural requirements (the 2021 International Building Code flags soil as expansive at a Plasticity Index of 15 or greater). The result: cut volumes rarely yield usable select fill, and Central Texas relies on imported, spec-compliant material. The Austin metro added roughly 58,000 residents between 2023 and 2024 (U.S. Census Bureau) and now exceeds 2.5 million, with semiconductor and data-center campuses in Williamson County driving heavy earthwork demand.
How We Spec & Source Material
Commercial fill is only useful if it meets the spec. We source select fill, flexible base, and structural material to the standards your engineer and the jobsite require, and deliver it with the documentation your testing lab needs.
TxDOT Item 132 - Embankment
The benchmark for select/structural fill: Type A material caps Liquid Limit at 45 and Plasticity Index at 15, with field density tied to PI. TxDOT 2024
TxDOT Item 247 - Flexible Base
Road base and stabilized access: Grade 1-2 caps Plasticity Index at 10 and Liquid Limit at 40, compacted to 100% of max dry density. TxDOT 2024
Compaction & Atterberg testing
Material is verified by Proctor (ASTM D698 / D1557), Atterberg limits / PI (D4318), and USCS classification (D2487).
Edwards Aquifer & stormwater compliance
Over the Edwards recharge/contributing zone, earthwork needs a TCEQ-approved water-quality plan before soil is disturbed (30 TAC 213). Sites disturbing 1+ acre also need a SWPPP under the TCEQ CGP (TXR150000); we plan delivery and staging around both.
Austin Soil Delivery FAQ
References & Authorities
The technical claims on this page are grounded in primary sources:
- USDA-NRCS - Tarrant series
- USDA-NRCS - Brackett series
- USDA-NRCS - Eckrant series
- USDA-NRCS - Houston Black series
- USDA Web Soil Survey
- TWDB - Edwards (Balcones Fault Zone) Aquifer
- TCEQ - Edwards Aquifer Protection Program
- TxDOT - Item 132 Embankment (2024)
- TxDOT - Item 247 Flexible Base (2024)
- ICC - 2021 IBC, expansive soils (§1803.5.3)
- TCEQ - Construction General Permit (TXR150000)
- U.S. Census Bureau - Metro Area Population Trends
Need dirt in Austin?
Tell us the material, the volume, and the site. Charlie will get you a quote the same day.