Chiller and Cooling Plant Pads in Texas

Water decides how a Texas data center rejects its heat. Every megawatt a hall consumes becomes heat that has to leave the site, and the equipment that does it, chillers, dry coolers, cooling towers and their pumps and piping, sits on pads in a plant yard next to the building. Whether that plant uses water, air or both is a design choice with consequences for the pads, the piping, the utility service and the permits.

A chiller or cooling plant pad is the foundation under that equipment. It carries the machine's weight, resists its vibration, keeps it level for its bearings and refrigerant circuits, and gives the piping, electrical and controls a fixed set of connection points. The pad is simple concrete, and it is easy to get wrong in ways that cost a great deal to fix, because the equipment above it is expensive and the schedule behind it is long.

We build the pads, the trenches and the support structures for cooling plants, and we coordinate them with the mechanical contractor so that equipment sets once and connects cleanly.

Texas voters approved Proposition 4 on November 4, 2025, authorizing up to $1 billion per year from existing sales tax revenue, starting in 2027, for water supply projects such as desalination, pipe repair, reuse, conservation and permitted reservoirs. The measure, which the Texas Water Development Board administers, is expected to total about $20 billion over two decades, though transfers occur only when sales tax collections exceed $46.5 billion in a given year. For a data center owner the signal is that water supply is a public priority, and that the supply options near any site may change.

Owners cannot depend on that investment today, so the plant is designed for the supply that exists. An air-cooled plant uses little water but needs more electricity and more pad area. A water-cooled plant is more efficient but needs a reliable supply, treatment and discharge. We show owners the pad and yard consequences of each, so the decision is made with the physical facts in view.

The pads are reinforced concrete, sized for each machine's footprint and weight, with the anchor bolt patterns, housekeeping pads and vibration isolation specified by the manufacturer. Around the pads we install chilled water and condenser water piping trenches or supports, pump bases, electrical duct banks and cable trays, and drainage for the plant area.

For large plants, additional elements appear: thermal storage tank foundations, expansion tank pads, water treatment skids and screen walls. The cooling yard and its connection to the building are described in more detail in cooling water supply and reuse lines, and when the heat load involves direct-to-chip systems, the plant interfaces with liquid cooling infrastructure coordination. Both depend on the pads being right.

The Texas Commission on Environmental Quality states that before building on the recharge, transition or contributing zones of the Edwards Aquifer, a plan must be reviewed and approved by its Edwards Aquifer Protection Program under 30 TAC Chapter 213, and that technical review of an administratively complete application takes 90 days. A cooling plant near San Antonio that handles water, treatment chemicals and stormwater therefore has an approval to plan around, and the pad layout can change what the review needs to cover.

Ground movement is a concern of its own. In the Midland-Odessa area, the Railroad Commission reports six felt earthquakes of magnitude 3.5 or greater between February 2020 and September 2021 in the Gardendale Seismic Response Area, and it suspended certain deep disposal well permits. A cooling plant is not an oil and gas facility, but owners in that region ask whether pads and pipe supports should allow for ground motion. We bring the structural engineer and the mechanical supplier into the conversation, and we detail flexible connections and restraints to the engineer's design.

Cost follows the cooling method. Air-cooled plants need larger pads and more of them, plus larger electrical service, but little water infrastructure. Water-cooled plants need smaller pads for the chillers but add towers, pumps, treatment and storage. Thermal storage tanks add foundations and piping. Redundancy matters as well: an N+1 or 2N plant has more equipment on more pads.

Site conditions add or subtract cost. Rock, high groundwater and soft soil change foundations. A long run between plant and building raises piping and trench cost. We price the plant yard as a package with the building, because owners tend to see the yard cost only after the building is priced. Our central utility plant description shows what the finished yard looks like, and AI and GPU cloud operators are the owners most likely to need an oversized plant.

The pad is reviewed as part of the building permit, and the mechanical equipment is reviewed for refrigerant, electrical and fire safety. Because Texas cities may adopt local amendments to the International Building Code, the review may cover screening, setback and sound requirements that the state statute does not itself state. We confirm the local rules before pads are released for pour.

If the plant uses water, additional approvals may apply: water service, backflow protection, discharge permits and local ordinances on cooling tower drift and treatment. We build a list for each site and place it in the schedule. The mechanical and electrical designers, the owner and the city each have a role, and we keep the list current. Nearby projects around San Antonio and Midland illustrate how much local requirements vary.

Send the cooling method, the equipment list and the site. We will return a yard layout, a pad and piping scope and an approvals list. If the cooling method is not yet chosen, we will price air-cooled and water-cooled options side by side.

How much does a chiller weigh, and does it change the pad?

Chiller weights vary by type and size, and the manufacturer supplies the operating weight and the load points. The pad is designed for those loads, for vibration and for the bolt pattern. We never pour a pad until the equipment submittal is approved, because a late change in model can mean a different footprint.

Why does the pad need isolation?

Chillers and pumps vibrate, and vibration can travel through the structure into pipes and into the building. The manufacturer may require springs, pads or inertia bases. We include the isolation in the pad design and check clearances so that piping connections stay flexible.

Do we need thermal storage?

Sometimes. Storage tanks hold chilled water so that the plant can ride through a short interruption or reduce peak electrical demand. They add foundations, piping and approvals. We help owners compare the cost of storage with the cost of a larger or more redundant plant.

Can the plant be expanded later?

Yes, if we plan the pads, the header sizes and the electrical capacity for future units. We recommend building the expansion pads or the underground connections in the first phase when expansion is likely, because adding them next to running chillers is slow.