St. Louis Marcellus/Utica Pipeline Begins Construction Industrywide Issues | Pipelines | Regulation January 9, 2019January 9, 2019 Spire STL Pipeline route (click for larger version) In February 2016, MDN told you about an exciting new market for Marcellus and Utica Shale gas that may open up one day in the Midwest (see New Midwest Pipeline to Tap REX’s Marcellus/Utica Gas). That day is coming–this year. Please Login to view this content. (Not a member? Join Today!) Related