US Army Corp Engineers OKs Halcon Pipeline in Trumbull County, OH Energy Companies | Halcon Resources | Industrywide Issues | Ohio | Pipelines | Regulation | Trumbull County September 9, 2013September 9, 2013 Good news for Halcon Field Services: The Pittsburgh District of the U.S. Army Corps of Engineers has cleared the way for Halcon to horizontally drill and install a natural gas gathering pipeline beneath federal land in Trumbull County, Ohio… Please Login to view this content. (Not a member? Join Today!) Related