Data Center Construction in Rockwall, Texas

Whether a Rockwall site can host a data center is answered by the utility long before it is answered by an architect, so we organize the project around the interconnect timeline. We start by asking how many megawatts the owner needs, in what stages, and what the serving utility has said about the study, the substation and the transmission upgrades behind the request. Then we set every other date, including land closing, design, equipment orders and shell construction, to that answer.

The city stands on Lake Ray Hubbard's eastern shore, around 20 miles northeast of Dallas, close enough to the load centers of the Metroplex that operators watch it for capacity. Interstate 30 and State Highways 66, 205 and 276 serve the city, together with several farm-to-market roads, giving heavy equipment more than one way in. The city's technology park is a sign of how seriously the area treats industrial land: its third phase had a ribbon cutting on December 1, 2023, bringing 210 shovel-ready acres to a 550-acre park, and between them the earlier two phases house 22 employers whose payrolls total roughly three thousand full-time employees.

Shell and core work matters here as well, because a shell that is ready early gives an owner room to negotiate with the utility. We build the shell and the substation yard as separate packages so that the building can move forward while the utility finishes its work, and so that unfinished power does not hold up the concrete and steel.

Operators seeking tens or hundreds of megawatts, including hyperscale cloud providers, work on a different clock from tenants who lease a suite. They negotiate transmission service, commit to substations and often fund the upgrades themselves, so their construction partner has to be comfortable with long utility agreements and with building the yard that receives the utility's lines.

Smaller enterprise and public-sector owners benefit from the same discipline at a smaller scale. A district or agency that adds a computing room still needs a service upgrade and a transformer, and we help them request it in time. The school district's bond program, with $458.9 million of Proposition A in November 2021 for new campuses and a replacement elementary school plus $16.9 million of Proposition B for technology, is an example of the kind of capital program that creates network and server rooms across a campus.

We begin every project with the date power must arrive and subtract the time needed for testing, commissioning, equipment setting and construction. That produces the date the shell must be dry, the date the substation yard must be complete and the date the utility must release the interconnect. If those dates do not fit, we tell the owner at the start, not after the building is half complete.

Our utility and substation site work package covers grading, grounding grids, foundations, duct banks, oil containment and fencing for the yard, built to the utility's standards and inspected by the utility. We coordinate the schedule with the utility's engineers and keep a written log of every request and response. If the utility changes the point of interconnection or the voltage, we rework the yard layout and tell the owner what it costs in time and money the same week.

Substation sites bring electrical hazards that a normal building site does not. We establish clearances from energized lines and equipment, require qualified workers for any work near them and run pre-task briefings for crane, excavation and trenching activities. Where the utility has its own rules, we adopt them and train every trade partner on them.

Weather also deserves respect near the lake. Wind affects crane operations and the setting of panels or steel, storms bring lightning, and heat limits working hours. We publish stop-work thresholds before the season begins and enforce them equally on every trade.

A realistic schedule has a utility track and a building track, joined at energization. We show both on one chart, with the owner's decisions, the utility's milestones and the manufacturers' delivery dates. Early works, such as site grading, drainage and the substation pad, start while design continues, and the shell follows in phases.

Long-lead gear such as transformers, breakers and switchgear drives the first order dates. We use data center shell and core packages to complete the structure and enclosure while the electrical equipment is manufactured, then install and test as equipment arrives. Where a delivery slips, we resequence the interior work so trade partners stay productive, and we log the change against the energization date it threatens.

Rockwall's distance from Dallas, its highway network and the presence of ready industrial land make it a candidate for owners who want a site outside the densest part of the Metroplex. Larger parcels allow generator yards and substations to sit away from neighbors, and ample frontage helps with truck access.

Owners comparing sites will also look at Garland and Mesquite, where utility conditions and existing infrastructure differ. We prepare comparisons that put each site on the same assumptions for power, land, cost and schedule, and we can advise on whether an on-site substation yard is justified.

Tell us the megawatts, the stages and what the utility has said so far. We will return a combined utility and construction schedule, a substation yard concept and a list of decisions to make first.

How long does utility interconnection take for a large data center?

It depends on the size of the load, the existing grid and the upgrades required, and it can take years for the largest requests. We ask the utility for its study schedule and any known constraints before the owner buys land, then build the project schedule around the answer.

Can the building be built before the substation is finished?

Yes, and often it should be. The shell, the interior and much of the mechanical work can proceed while the utility builds its facilities. The one thing that cannot be finished is final energized testing, so we plan temporary arrangements where they make sense.

Who builds the substation yard?

It depends on the arrangement. The owner may build the yard and equipment pads to the utility's standard while the utility installs its own gear, or the utility may build more of it. We read the agreement and set scope lines clearly.

What does a shell and core package include?

Foundations, slab, structure, roof, exterior walls, base mechanical and electrical rough-in and the site work around the building. The interior fit-out follows later, so an owner can lease or fit out in phases.

How do you manage the trades on a project like this?

We schedule and coordinate concrete, steel, electrical and mechanical trade partners, supervise their work in the field and inspect results against the drawings and the utility's requirements. The owner has one point of contact.