Once large infrastructure projects, such as oil and natural gas pipelines, receive federal government approval, they are often the target of legal challenges from opposition groups. Opponents repeatedly argue that the environmental review, pursuant to the National Environmental Policy Act (NEPA), was insufficient. If a court finds deficiencies in the government’s NEPA analysis, can a court halt construction or cease operations even after years of project design, permit approvals at all levels of government, and tens of millions of dollars in investment? This question was at the heart of the ongoing litigation involving the controversial Dakota Access Pipeline (DAPL), and, on October 11, Judge James Boasberg determined “no,” the court would not shut down the pipeline. This case is important precedent for projects being challenged under NEPA. The same issue is at play in the Sabal Trail case currently under review by the US Court of Appeals for the DC Circuit. See Sierra Club, et al. v. FERC, No. 16-1329 (D.C. Cir. filed Sept. 21, 2016).