Enterprise Products Partners LP (NYSE: EPD) began a supplemental binding open season for the Aegis Pipeline between Mont Belvieu, Texas, and the Napoleonville, La., area along the Mississippi River corridor, the company said April 9. The supplemental period began that day and ends May 11.

Incremental capacity for long-term transportation agreements to the Napoleonville area was requested by shippers, the company added.

The 270-mile (m) pipeline system will move purity ethane from Enterprise’s Mont Belvieu liquids storage complex to petrochemical facilities in Texas and Louisiana.

The remainder of the Aegis Pipeline will be completed in two phases, which are scheduled for completion by year-end 2015. The initial 60-m segment from Mont Belvieu to Beaumont, Texas, began service in September 2014.

Houston-based Enterprise Products Partners LP is a domestic-focused midstream company.