This week, the U.S. District Court for the Middle District of Louisiana granted a preliminary injunction, halting construction of the $750 million Bayou Bridge Pipeline. Judge Shelly D. Dick concluded that the U.S. Army Corps of Engineers, in authorizing the project, did not provide sufficient explanation for how the proposed off-site mitigation would compensate for the loss of wetlands impacted by construction. In addition, the Court found the Corps’ environmental analysis failed to sufficiently consider and address historical impacts to wetlands from similarly situated pipelines. Thus, the Court held that these deficiencies likely violated the National Environmental Policy Act (NEPA) and ordered the 162-mile oil pipeline to halt construction within the Atchafalaya Basin, a large wetland habitat for a variety of fish and wildlife species and a critical component of regulating flooding and stream recharge in the region. As we recently saw with the D.C. Circuit’s decision to vacate authorizations for the Sabal Trail Pipeline, this is another example of courts and environmental organizations relying on errors in a federal agency’s NEPA analysis to justify enjoining pipeline construction or operations.