Auto assembly lines, aircraft maintenance hangars, rail-served logistics and office projects in San Antonio each demand a different slab, and all of them sit on ground that may be rock, clay or aquifer-sensitive. We build the building pads, floors, aprons, paving and underground systems that let those owners open on schedule.
The growth is public. Toyota announced on July 6, 2026 that it will spend $3.6 billion expanding its San Antonio plant, adding a second Tacoma assembly line, 2,000 jobs and 2.5 million square feet, so the plant would be twice its present size by 2030. A September 2025 local report says Port San Antonio covers 1,900 acres on the city's West Side, provides nearly 18,000 jobs directly and has aircraft maintenance operators among its tenants. Plants and campuses of that size bring suppliers, logistics buildings and housing, and each needs site work.
Our approach starts with the soil report and the permit map, because both can change a San Antonio schedule more than the weather will.
The aquifer review that can add 90 days
Anyone building on the recharge, transition or contributing zones of the Edwards Aquifer needs a plan approved first by the TCEQ Edwards Aquifer Protection Program under 30 TAC Chapter 213, and the agency says technical review of an administratively complete application takes 90 days. That review is not optional if a site is in the mapped zones, and it can set the project's timeline before any equipment is mobilized.
We help owners by asking early whether a parcel lies in a regulated zone, reading the approved plan's requirements for temporary and permanent controls, and building them as drawn. Temporary silt fences, sediment basins and stabilized entrances are installed before clearing and maintained. Texas commercial code adoption is municipal, using the International Building Code as a baseline with local amendments, which we confirm with the city.
Plants, an aerospace campus and a railport
A Port San Antonio summary of a 2016 state Comptroller study describes the 1,900-acre campus as accessible by air, rail and truck, with an industrial airport at Kelly Field and an East Kelly Railport supporting the region's energy, construction, manufacturing and retail sectors, and says less than half of the acreage had been developed at that time. In March 2025 the port's board approved more than $7 million to finish design of an office tower aimed at aerospace and defense companies, and the port's existing space totals 10 million square feet at more than 97 percent occupancy.
Those statements show a mixed market: hangars, offices, warehouses and rail-adjacent yards. We bring aircraft hangar, automotive and EV plant and office building site experience, and we price each type separately.
Pads, aprons and underground systems
A hangar needs a thick, flat slab with embedded tie-downs and drains, and a ramp that handles aircraft tires and tugs. A manufacturing plant needs reinforced slabs, trench drains, equipment pits and truck docks. An office project needs a podium or slab, parking and sitework. We build each from the plans, and industrial and manufacturing owners get the same attention to subgrade, joints and curing as anyone else.
Underground, we install fire lines, water, sanitary and storm systems and electrical duct. The water main installation crews we coordinate pressure-test and disinfect lines according to utility requirements, and our utility potholing and locating work reduces strikes in busy corridors.
Heavy trucks, tight sites and open rock
San Antonio plants and airfields combine heavy truck traffic, aircraft movements and tight work areas. We coordinate with site security and operations, mark work zones and use spotters, and we respect restricted airspace and lighting rules near airfields. Where rock excavation is necessary, we follow vibration, dust and noise limits, and we protect nearby utilities. Our trade partners also review the site logistics with plant security before the first load, since a delivery turned away at the gate can ruin a pour day.
Housekeeping matters on these campuses. We sweep haul routes, keep washout pits lined and signed, and clear debris daily so aircraft and vehicles are not exposed to loose material. Visitors to a site should see a clean, orderly operation, and so should the inspector.
Ground that is not uniform
San Antonio sites can change from clay to hard ground over a short distance. Where rock is near the surface, excavation needs different equipment, blasting or hammering restrictions may apply near neighbors, and trench widths and bedding change. We read the boring logs to anticipate it and price rock as a separate item, using our rock and hard ground excavation methods when the plans call for it.
Clay is a separate matter. Swelling soils move with moisture, so we protect prepared subgrades from wetting and drying, and follow the engineer on treatment or moisture conditioning. The right approach depends on borings, not on the neighborhood.
Timing around permits and large projects
Permit review, utility coordination and large nearby projects all affect the calendar. We start permit conversations early, schedule utility shutdowns with the provider and book concrete suppliers ahead of peak demand. If a plant expansion pulls resources, we say so and adjust.
Projects that extend toward the Eagle Ford or the coast use the trade partners and site equipment we coordinate efficiently, and we plan the moves between sites.
Where a San Antonio estimate changes
Rock, permit-driven controls and import or export of material move the numbers most. Rock excavation takes longer and wears equipment. Aquifer-zone controls add temporary measures and inspection. Large-volume projects add haul and disposal costs. We list those items separately so owners can see them.
Another factor is site access in developed areas, where traffic control and limited staging add labor. We ask for those details early and include them.
Discuss your San Antonio site
Send the civil plans, the geotechnical report and any aquifer permit status. We will map out grading, utilities and concrete for your site.
Common Questions
How do I know if my site is in the Edwards Aquifer zones?
The mapped recharge, transition and contributing zones are published by the state environmental agency, and an engineer or the agency can confirm a parcel. If it is in a zone, an approved plan is required before building.
What happens if we find rock during excavation?
We stop, document the condition and follow the contract's differing-site-condition process. Rock excavation uses different equipment and may carry a separate unit price.
Can you build a hangar slab?
Yes. We build thick, flat slabs with embeds, drains and aprons to the engineer's design, and coordinate with the hangar door and steel suppliers on tolerances.
How do you schedule around permit review?
We help the owner map the permit timeline, then plan mobilization for the day approval arrives. Pre-work such as procurement and submittals can proceed during review.
Do you work on large manufacturing campuses?
Yes. We follow the owner's safety program, plan around active operations and keep documentation current.