Crestwood Equity Partners LP is a holding company and a master limited partnership (MLP). The Company develops, acquires, owns or controls, and operates assets and operations within the energy midstream sector. The Company's segments include gathering and processing (G&P), which includes its natural gas, crude oil and produced water G&P operations; storage and transportation, which includes its natural gas and crude oil storage and transportation operations, and marketing, supply and logistics, which includes its natural gas liquid (NGL) supply and logistics business, crude oil storage and rail loading facilities and fleet, and salt production business. The Company provides infrastructure solutions to service natural gas and crude oil shale plays across the United States. It owns and operates a portfolio of crude oil and natural gas gathering, processing, storage and transportation assets. Its operating assets are owned by or through its subsidiary, Crestwood Midstream Partners LP.