Central Utility Plant Construction in Texas

One hundred days at or above 100 degrees in a single year is how the record reads for Wichita Falls in 2011, in the middle of a drought that ran from 2010 to 2013. A central utility plant for a data center has to be designed for a year like that, because the plant is the part of the project that decides whether the halls can stay cool when the weather and the water supply are both against them.

A central utility plant is a separate building or yard that houses the chillers, pumps, cooling towers or dry coolers, thermal storage, water treatment and the electrical gear that serves them. It serves the data halls through underground or overhead piping, and it is sized in modules so capacity can grow with the campus. Many Texas projects place it between the substation and the halls so electrical and piping runs stay short.

We start from power and cooling, then work back to the building and the site. In a plant, that means the heat rejection method and the water source are decided first, and the foundations, pipe racks and buildings follow.

Whether a plant uses evaporative towers, dry coolers or a hybrid of the two depends on water. Some owners buy municipal water, some drill wells, some reuse treated wastewater and some pipe water from a distant source. Texas voters approved Proposition 4 in November 2025, which directs up to $1 billion a year, starting in 2027, to water supply projects including desalination, pipe repair, reuse, conservation and permitted reservoirs, and the Texas Water Development Board administers it. That money may change what is available in some regions, but owners should not plan around funding that has not been committed to their site.

Our cooling water supply and reuse lines service builds the pipelines, tanks and treatment structures that connect a source to the plant, and we advise on how each method affects the electrical load and the land area.

Groundwater rules vary by region. The Harris-Galveston Subsidence District, created by the legislature in 1975, regulates groundwater withdrawal in Harris and Galveston counties because pumping compacts aquifer clay and lowers the ground permanently. A plant that expected to run on wells in that area would face limits that surface water or reuse would not.

In the San Antonio area the Texas Commission on Environmental Quality requires an approved plan from its Edwards Aquifer Protection Program before building on the recharge, transition or contributing zones, and it states that technical review of an administratively complete application takes 90 days. A plant on that land carries tanks, fuel and chemicals, so the review matters. See our San Antonio page and Wichita Falls page for regional site notes.

The plant needs a heavy slab or pile-supported foundation for chillers and pumps, pipe racks and trenches, electrical rooms, a controls room, a laydown area, and truck access for chemical deliveries and maintenance. Pads for chillers and cooling units are poured to tight tolerances so vibration isolation and alignment work as designed. Our chiller and cooling plant pads work covers them.

The plant also needs a secondary containment plan for fluids, a stormwater plan, and sometimes a noise barrier. We build these into the site package so the plant is a completed system when equipment arrives.

Plants are designed with extra chillers, pumps and loops so one can be taken out of service. That redundancy works only if valves, isolation points and cross-connections are physically installed and accessible. We review the design for maintainability before construction: can a technician reach a valve, can a pump be pulled, can a chiller be replaced with a crane.

We also sequence startup so the plant can run before the halls need it. A plant that is commissioned early can support construction cooling, dry-out of the building and early testing of equipment.

The plant needs electrical service of its own, often at medium voltage, and its schedule is tied to the substation. We work with utilities and power developers on the tie-in, and the on-site substation yard is generally built first. Generators serving the plant are discussed under generator and fuel yards. Coordinating the two yards matters because the plant and the generators share fuel, water and electrical rooms, and a clash between their pipe racks and duct banks is far cheaper to solve on paper than in a trench. We run a combined clash review of both yards before any trenching begins, and we keep one set of underground drawings for the whole campus.

Equipment dominates. Chillers, towers, pumps, heat exchangers and controls are bought in lots and priced by capacity, and the electrical gear that feeds them is costly and slow to arrive. Piping is the second large line, especially large-diameter pipe in long runs, and welding, testing and flushing add labor that is easy to underestimate.

The site package is the third line: foundations, trenches, paving, containment, fencing and stormwater. Soil conditions change that package a great deal. Expansive clay needs drilled piers or select fill under heavily loaded pads, and we price geotechnical findings into the plant instead of treating them as a later change.

A central plant draws building, mechanical, electrical, plumbing, fire and environmental permits, and the water side may add discharge or supply permits. The edition of each code depends on the jurisdiction: Texas law makes the International Building Code the municipal baseline, and cities add amendments by ordinance. Energy code compliance follows the state's reference unless the city has adopted a newer edition.

We keep a permit matrix by authority and by trade, with submittal dates and review durations, so the owner sees early which approval will govern the start of equipment setting.

Tell us the water source, the load and the cooling method. We will lay out the plant, the pads and the pipe runs.

Does the plant sit inside the data hall building?

Sometimes for small projects, but larger campuses use a separate plant so noise, water and chemicals stay away from the halls, and so the plant can grow separately. The choice affects piping length and cost.

Can we use treated wastewater for cooling?

Often yes, subject to the supplier's quality, pipeline availability and the owner's treatment plan. Reuse lines are a significant construction item. We price the pipeline and treatment together.

How do drought years affect plant design?

They push owners toward dry or hybrid cooling, storage tanks or reuse. Wichita Falls recorded 100 days of 100 F or higher in 2011 during a multi-year drought, so we design plants with a margin for both heat and water scarcity.

How long are central plant approvals?

Plans that touch protected aquifer zones go through a TCEQ review that takes 90 days after the application is administratively complete, and local reviews run in parallel. We start the paperwork before design is final.