Exxon Mobil’s facility is the second largest oil refinery in the United States located in Baytown, Texas. It has a capacity of 584,000 barrels per day. MK has updated and expanded the site since it first opened in 1919 enabling it to become the largest employer in the city. After our expansion of it in 1988 through 1990, the plant takes up 2,400 acres of land adjacent to the Houston Ship Channel that the company had an integral hand in as well. Today Morrison-Knudsen continues to upgrade the plant to meet the stricter environmental standards required in the petroleum industry.