Crestwood Equity Partners LP engages in investment and management of energy midstream assets. It operates through the following segments: Gathering and Processing; Storage and Transportation; and Marketing, Supply, and Logistics. The Gathering and Processing segment provides gathering and transportation services; processing, treating, and compression services; and disposal services to producers in unconventional shale plays and tight-gas plays. The Storage and Transportation segment includes COLT Hub and equity investments in three joint ventures. The Marketing, Supply, and Logistics segment comprises of natural gas liquids, crude oil, and natural gas marketing and logistics operations. The company was founded by Robert G. Phillips in October 2010 and is headquartered in Houston, TX.