A drop-in meeting for a proposed gigawatt data center has been canceled after the company behind it claimed it faced a "credible" bomb threat.

Developer Quantum DC is looking to build the Tungkillo Compute and Energy Hub, a large-scale data center and power campus that could total 1.2GW at full build-out.

Should the Adelaide, Australia, project be approved, the company anticipates the first stage will commence operations in 2028, with the full development completed by 2031.

The company has not previously built or operated data centers.

The project has faced mounting opposition from locals and farmers, who claim that the 220-acre development would impact the natural environment, livestock, and the dark sky reserve. Project documents state that facility construction is expected to require 150 million to 250 million liters of water, with an annual water demand of about 20 million liters once operational.

Quantum DC has sought to use South Australia’s Essential Infrastructure assessment process, which would provide a 15-day public submission period.

The company looked to address some of these local concerns with a drop-in session.

"Unfortunately, due to a credible bomb threat made, we have had to cancel this community drop-in session in the interest of safety," a note from the company said. "This has been reported to SA Police.

"We will share more information very soon about future opportunities for engagement. Please see quantumdc.com.au."

Quantum DC chief executive Alby Tomassi told 7news: “We are extremely disappointed that we were forced to postpone this afternoon’s community drop-in session after a credible bomb threat was received.

“Public safety must always take priority, and we had no choice but to make this decision."

DCD has contacted Tomassi for more details on the incident.