The Iowa Supreme Court is considering oral arguments from landowners and environmental activists attempting to unravel approval by the Iowa Utilities Board (IUB) in 2016 for the Dakota Access Pipeline, which is in service and crosses the state. The Grow America’s Infrastructure Now coalition said the IUB conducted 18 public informational meetings and 12 days of public hearings on the four-state, multi-billion dollar oil pipeline owned and operated by Energy Transfer Partners LP. Supporters expect the state high court to reaffirm lower court rulings that rejected challenges to the pipeline.