The Texas company planning a crude oil pipeline that will cut across Iowa received the final federal permit approvals needed to proceed with construction. Documents posted by the Iowa Utilities Board show the U.S. Army Corps of Engineers approved 60 river crossings in Iowa for Dakota Access, a decision pipeline opponents hoped to stop.The company, a subsidiary of Dallas-based Energy Transfer Partners, plans construction of a $3.8 billion, 1,168-mile project that's already begun in Illinois, North Dakota and South Dakota. Some preliminary work had also begun in Iowa but the final permits were needed for workers to complete large stretches of pipeline, including sections that cross major rivers.