Established in 2006 as a joint venture between ONEOK Partners and Williams, Overland Pass Pipeline Company operates a 760-mile pipeline from Opal, Wyoming to Conway, Kansas. Additionally, it has extensions into the Piceance and Denver-Julesberg Basins in Colorado. The company's pipeline is designed to transport approximately 245,000 barrels per day of natural gas liquids, serving the Mid-Continent NGL market center.