SA government argues MotoGP circuit fits parklands precedent in heritage assessment

South Australia's government is making a deliberate argument: the Adelaide parklands have already absorbed major infrastructure projects without losing their national heritage status, so a MotoGP circuit should be no different. In a submission to the federal government, officials pointed to the O-Bahn tunnel, which opened in 2017, and the Women's and Children's Hospital currently under construction at the old Thebarton Barracks site as proof that substantial, permanent changes to the parklands can be assessed under federal conservation law and deemed not to constitute a "controlled action"—the legal threshold that triggers rigorous environmental and heritage review.

The government's reasoning hinges on precedent. Under federal law, a controlled action is a project determined to have significant impact on the environment or heritage of a place. The state argues that because the O-Bahn tunnel, the hospital, and a south parklands stormwater project all passed that test without triggering controlled action status, the MotoGP circuit—which the government says mostly involves upgrades to existing infrastructure rather than wholesale new construction—should follow the same path. The logic is straightforward: if those projects didn't degrade the parklands' heritage values, neither will this one.

But the legal ground beneath this argument is shifting. Last week, a Federal Court judge dismissed a case challenging the North Adelaide Golf Course redevelopment, also located on the parklands, ruling that tree loss and construction there were unlikely to significantly disturb the landscape. That decision appeared to validate the government's position. Yet a separate Federal Court case against the MotoGP plans is already underway, suggesting the precedent argument may not settle the matter.

The government's assessment acknowledged that past projects cannot be mechanically applied to evaluate the circuit, but it maintained they demonstrated a pattern: substantial changes to the parklands have repeatedly been found to have no significant impact on heritage values. The report also examined potential effects on the grey-headed flying fox, a threatened species present in the project area. It conceded that construction and the race event itself would cause temporary disturbance and result in some loss of foraging habitat, but concluded these impacts would be localized and would not affect roosting sites or critical habitat.

Premier Peter Malinauskas framed the decision to refer the project to the federal government as a strategic move, not a legal necessity. When the circuit design was revealed in late August, he said the government had received expert advice that a Commonwealth referral was not required. But the state chose to refer anyway—a self-referral that shifts the burden of assessment to federal authorities. His reasoning was blunt: time. "We've got to get all this done by November 2027," Malinauskas said, "and so we are naturally concerned about what activist litigation might do if we follow the advice and stick with the self-assessment." The North Adelaide Golf Course case had already demonstrated how legal challenges could stall projects during the referral process. By voluntarily submitting to federal review, the government hoped to preempt that delay.

Public consultation on the submission closed on Friday. The federal government's assessment is now pending, and the outcome will determine whether the MotoGP circuit clears the heritage and environmental hurdles or faces the kind of prolonged legal scrutiny that has already complicated other parklands projects. The report itself did not examine event operations—the race, concerts, spectator facilities, or temporary structures—focusing instead on the infrastructure and landscape changes associated with the circuit itself. That narrower scope may become a point of contention as the federal review proceeds.