Motiva's Port Arthur, Texas refinery was poised last year to become the largest refinery in the United States after an expansion was completed. However, problems arose after the expansion was opened and it was subsequently closed for months.

Extensive damage was caused and the plant was repaired over the winter, and is again set to re-open in the coming days and weeks. However, it suffered another set back this week when a power outage on April 13 tripped it offline. The refinery is again beginning the process of restarting its facility and opening the expansion.

According to Kimberly Windon, Media Relations with Shell, "The Motiva Port Arthur Refinery is in the early process of preparing units for re-start, following a refinery shut-down which took place on April 14, 2013, as a result of the unexpected loss of power from our utility provider. The refinery is safely progressing through a structured and planned restart sequence that will encompass several days."

Motiva's Port Arthur refinery is over 100 years old, and is a 50/50 joint venture between Shell Oil Company and Saudi Refining, Inc.

Once the expansion is operational, the refinery will be able to convert 600,000 barrels of oil per day into 240,000 barrels of gasoline, 190,000 barrels of diesel, 70,000 barrels of jet fuel, 40,000 barrels of lubes, and 8,000 tons per day of fuel coke.