US data center expansion strains electrical grid capacity as buildout outpaces infrastructure investment.

Utilities are planning generation and transmission around enormous projections for data center demand, but announced megawatts don't necessarily become load on schedule.

Nearly 40% of U.S. data center projects scheduled for completion this year could miss their targets by more than three months, according to geospatial analytics company SynMax. Labor shortages, equipment constraints, permitting and—increasingly—access to electricity are slowing the buildout. Here are five projects showing where bottlenecks have emerged.

**Wisconsin: Project Lighthouse waits on transmission**

Oracle's massive Project Lighthouse campus in Port Washington, Wisconsin is under construction, but connecting it to the grid has become more complicated. Vantage Data Centers is developing the four-building campus, with Oracle as the tenant. Utility records put its total electricity demand at roughly 1.3 GW.

American Transmission Co. applied in September 2025 for approval of more than $1 billion in transmission infrastructure needed to serve the campus. Wisconsin regulators later withdrew their determination that the application was complete after extensive revisions, requiring ATC to restart the process. Oracle still lists customer delivery for the second half of 2027.

However, independent analysis from Aterio estimates partial power could arrive in December 2027, with the full 1.3 GW available by October 2028. Those are Aterio estimates, not company targets. Aterio publishes predictive datasets and forecasts on U.S. data centers. Construction can keep moving, but energization is another story.

**New Mexico: Project Jupiter's gas supply hits turbulence**

Oracle's 2.45-GW Project Jupiter in New Mexico highlights another potential bottleneck: even behind-the-meter generation needs fuel. Oracle recently issued a force majeure notice tied to the Stargate campus, although the company says the project remains on track for 2028. The notice could allow Oracle to delay payments if the facility misses that target.

The planned 1,400-acre campus in Doña Ana County, near Santa Teresa, is expected to rely heavily on natural gas-powered fuel cells from Bloom Energy. But the pipeline intended to supply the project has encountered permitting problems and is running roughly six months behind schedule, pushing expected completion to February 2027. Project Jupiter hasn't missed its deadline. Its supporting fuel infrastructure has, adding uncertainty to a project designed in part to sidestep traditional grid constraints.

**Texas: Stargate's ramp takes longer**

The flagship Stargate campus in west Texas is operating, but its ramp to full capacity has taken longer than some early estimates suggested. The $500 billion AI infrastructure initiative in Abilene is backed by OpenAI, Oracle, SoftBank and MGX.

Samaritan Research initially estimated 600 MW would be operational earlier this year. It revised that forecast after an Oracle disclosure indicated about 200 MW was online in April and subsequently projected the full 1.2-GW campus would be operational in the fourth quarter. Oracle reported in September that OpenAI had taken delivery of about 75% of the capacity it's providing at the campus.

The distinction matters for utilities trying to forecast AI-driven electricity demand: building completion, energization, and full compute load are different milestones.

**Ohio: Microsoft blames messy Midwest spring weather**

Spring weather in the Midwest is anything but predictable—and it's been slowing Microsoft's data center buildout in Licking County, Ohio. Microsoft said in May that weather delays and time-sensitive construction milestones could require Sunday work to keep projects in Heath and Hebron on schedule.

In Heath, crews continued site preparation through the summer for a planned five-building, 264-MW data center campus designed to expand Microsoft's cloud infrastructure in central Ohio. In Hebron, construction continued through the summer on Microsoft's six-building, 317-MW data center campus, including site development and substation work across more than 200 acres.

**From canceled to operational in the Buckeye State**

Microsoft's data center buildout in Licking County, Ohio hasn't exactly gone according to plan. After Microsoft walked away from the $1 billion project in April 2025, plans resurfaced with a 2029 operational target.

The current timeline calls for mass grading through November, vertical construction in 2027 and 2028, followed by roughly a year of commissioning and ramp-up. Microsoft reiterated in a June 2026 economic impact report that its three Licking County campuses remain on track.

Aterio, however, says key milestones bear watching: whether grading finishes on schedule, when Heath and Hebron move to vertical construction, and whether the 2029 target holds.

**The bigger problem: Forecast megawatts aren't real megawatts**

Data center projects underscore a growing challenge for power producers and utilities: demand may be real, but its timing isn't guaranteed. Grid connections in major U.S. markets can take three to four years—and as long as seven years in northern Virginia. Of 16 GW of data center capacity announced for delivery in 2026, only about 5 GW was under construction as of this summer, according to TD Economics.

Texas has gone further, halting new data center grid connections while regulators audit projects amid concerns about speculative or duplicate requests. Proposed U.S. data center power requests have topped 700 GW, more than 10 times the estimated electricity currently consumed by U.S. data centers.

For generators, that's the rub. Data centers want gigawatts now. Power plants, pipelines and transmission lines still operate on timelines measured in years. The gap between the two could determine how much of the AI power boom actually shows up on the grid, and when.