The Seaway pipeline reversal isn't the only one being counted on to relieve the glut of crude oil stored in Cushing.
• The most talked about project is TransCanada's Keystone XL pipeline.
The company had hoped to build a transcontinental pipeline to bring oil from Canada's oil sands and the Bakken Shale in North Dakota through Cushing on its way to refineries on the Gulf Coast, but the Obama administration rejected its bid for a presidential permit in January.
TransCanada subsequently announced plans to build the southern portion of the Keystone XL line, which would transport oil from Cushing to the Gulf. The company also continues to pursue a permit for the full project.
• Tulsa-based Magellan Midstream Partners is looking at reactivating an idle pipeline that could move more oil out of Cushing.
Magellan also plans to reverse a Texas pipeline to provide an alternative transportation option for crude oil to help alleviate the situation at the storage hub.